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19-1017; Rev 0; 10/07
High-Linearity, 815MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2029
General Description
The MAX2029 high-linearity passive upconverter or downconverter mixer is designed to provide +36.5dBm IIP3, 6.7dB NF, and 6.5dB conversion loss for an 815MHz to 1000MHz RF frequency range to support GSM/cellular base-station transmitter or receiver applications. With a 570MHz to 900MHz LO frequency range, this particular mixer is ideal for low-side LO injection architectures. For a pin-to-pin-compatible mixer meant for high-side LO injection, refer to the MAX2031 data sheet. In addition to offering excellent linearity and noise performance, the MAX2029 also yields a high level of component integration. This device includes a double-balanced passive mixer core, a dual-input LO selectable switch, and an LO buffer. On-chip baluns are also integrated to allow for a single-ended RF input for downconversion (or RF output for upconversion), and single-ended LO inputs. The MAX2029 requires a nominal LO drive of 0dBm, and supply current is guaranteed to be below 100mA. The MAX2029 is pin compatible with the MAX2039, MAX2041, MAX2042, MAX2044 series of 1700MHz to 2200MHz, 2000MHz to 3000MHz, and 3200MHz to 3900MHz mixers, making this family of passive upconverters and downconverters ideal for applications where a common printed-circuit board (PCB) layout is used for multiple frequency bands. The MAX2029 is available in a compact 20-pin thin QFN package (5mm x 5mm) with an exposed paddle. Electrical performance is guaranteed over the extended -40C to +85C temperature range.
Features
815MHz to 1000MHz RF Frequency Range 570MHz to 900MHz LO Frequency Range 960MHz to 1180MHz LO Frequency Range (Refer to the MAX2031 Data Sheet) DC to 250MHz IF Frequency Range 6dB/6.5dB (Upconverter/Downconverter) Conversion Loss 36.5dBm/39dBm (Downconverter/Upconverter) Input IP3 +25dBm/+27dBm (Upconverter/Downconverter) Input 1dB Compression Point 6.7dB Noise Figure Integrated LO Buffer Integrated RF and LO Baluns Low -3dBm to +3dBm LO Drive Built-In SPDT LO Switch with 53dB Isolation and 50ns Switching Time Pin Compatible with the MAX2039/MAX2041 1700MHz to 2200MHz Mixers External Current-Setting Resistor Provides Option for Operating Mixer in Reduced-Power/ReducedPerformance Mode Lead-Free Package Available
Ordering Information
PART MAX2029ETP/-T TEMP RANGE PIN-PACKAGE -40C to +85C PKG CODE
20 Thin QFN-EP* T2055-3 (5mm x 5mm) 20 Thin QFN-EP* T2055-3 (5mm x 5mm)
Applications
Cellular Band WCDMA and cdma2000 (R) Base Stations GSM 850/GSM 900 2G and 2.5G EDGE Base Stations TDMA and Integrated Digital Enhanced Network (iDEN(R)) Base Stations PHS/PAS Base Stations WiMAX Base Stations and Customer Premise Equipment Predistortion Receivers Microwave and Fixed Broadband Wireless Access Wireless Local Loop Private Mobile Radios Military Systems Microwave Links Digital and SpreadSpectrum Communication Systems
MAX2029ETP+/+T -40C to +85C
T = Tape and reel. *EP = Exposed paddle. +Denotes lead-free package.
Pin Configuration/ Functional Diagram
GND GND 17
TOP VIEW
20
19
18
16
VCC RF TAP GND GND
GND
IF+
IF-
1 2 3 4 E.P. 5
15
LO2 VCC GND GND LO1
MAX2029
14 13 12 11
cdma2000 is a registered trademark of Telecommunications Industry Association. iDEN is a registered trademark of Motorola, Inc.
6 VCC
7 LOBIAS
8 VCC
9 LOSEL
10 GND
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
High-Linearity, 815MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2029
ABSOLUTE MAXIMUM RATINGS
VCC to GND ...........................................................-0.3V to +5.5V RF (RF is DC shorted to GND through a balun)..................50mA LO1, LO2 to GND ..................................................-0.3V to +0.3V IF+, IF- to GND ...........................................-0.3V to (VCC + 0.3V) TAP to GND ...........................................................-0.3V to +1.4V LOSEL to GND ...........................................-0.3V to (VCC + 0.3V) LOBIAS to GND..........................................-0.3V to (VCC + 0.3V) RF, LO1, LO2 Input Power* ............................................+20dBm Continuous Power Dissipation (TC = +85C) (Note A) 20-Pin Thin QFN-EP................................................................5W JA (Note B)....................................................................+38C/W JC .................................................................................+13C/W Operating Temperature Range (Note C) ....TC = -40C to +85C Maximum Junction Temperature .....................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
Note A: Based on junction temperature TJ = TC + (JC x VCC x ICC). This formula can be used when the temperature of the exposed paddle is known while the device is soldered down to a PCB. See the Applications Information section for details. The junction temperature must not exceed +150C. Note B: Junction temperature TJ = TA + (JA x VCC x ICC). This formula can be used when the ambient temperature of the EV kit PCB is known. The junction temperature must not exceed +150C. See the Applications Information section for details. Note C: TC is the temperature on the exposed paddle of the package. TA is the ambient temperature of the device and PCB. *Maximum reliable continuous input power applied to the RF, LO, and IF ports of this device is +15dBm from a 50 source.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(Typical Application Circuit, VCC = +4.75V to +5.25V, no RF signals applied, TC = -40C to +85C. IF+ and IF- are DC grounded through an IF balun. Typical values are at VCC = +5V, TC = +25C, unless otherwise noted.)
PARAMETER Supply Voltage Supply Current LOSEL Input Logic-Low LOSEL Input Logic-High Input Current SYMBOL VCC ICC VIL VIH IIH, IIL 2 0.01 CONDITIONS MIN 4.75 TYP 5.00 85 MAX 5.25 100 0.8 UNITS V mA V V A
AC ELECTRICAL CHARACTERISTICS
(Typical Application Circuit, C5 = 3.3pF, L1 and C4 not used, VCC = +4.75V to +5.25V, RF and LO ports are driven from 50 sources, PLO = -3dBm to +3dBm, PRF = 0dBm, fRF = 815MHz to 1000MHz, fLO = 570MHz to 900MHz, fIF = 90MHz, fLO < fRF, TC = -40C to +85C, unless otherwise noted. Typical values are at VCC = +5V, PLO = 0dBm, fRF = 920MHz, fLO = 830MHz, fIF = 90MHz, TC = +25C, unless otherwise noted.) (Note 1)
PARAMETER RF Frequency Range LO Frequency Range IF Frequency Range LO Drive SYMBOL fRF fLO fIF PLO (Note 2) (Note 2) External IF transformer dependence (Note 2) (Note 2) LO2 selected, PLO = +3dBm, TC = +25C, fRF = 920MHz to 960MHz, fLO = 830MHz to 870MHz LO1-to-LO2 Isolation (Note 3) LO1 selected, PLO = +3dBm, TC = +25C, fRF = 920MHz to 960MHz, fLO = 830MHz to 870MHz PLO = +3dBm PLO = +3dBm, fRF = 920MHz to 960MHz, fLO = 830MHz to 870MHz (Note 3) CONDITIONS MIN 815 570 DC -3 48 53 dB 50 56 -17 -29.5 -23 dBm dBm TYP MAX 1000 900 250 +3 UNITS MHz MHz MHz dBm
Maximum LO Leakage at RF Port Maximum LO Leakage at IF Port
2
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High-Linearity, 815MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2029
AC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, C5 = 3.3pF, L1 and C4 not used, VCC = +4.75V to +5.25V, RF and LO ports are driven from 50 sources, PLO = -3dBm to +3dBm, PRF = 0dBm, fRF = 815MHz to 1000MHz, fLO = 570MHz to 900MHz, fIF = 90MHz, fLO < fRF, TC = -40C to +85C, unless otherwise noted. Typical values are at VCC = +5V, PLO = 0dBm, fRF = 920MHz, fLO = 830MHz, fIF = 90MHz, TC = +25C, unless otherwise noted.) (Note 1)
PARAMETER LO Switching Time Minimum RF-to-IF Isolation RF Port Return Loss LO1/LO2 port selected, LO2/LO1, RF, and IF terminated into 50 LO1/LO2 port unselected, LO2/LO1, RF, and IF terminated into 50 LO driven at 0dBm, RF terminated into 50 SYMBOL CONDITIONS 50% of LOSEL to IF, settled within 2 degrees fRF = 920MHz to 960MHz, fLO = 830MHz to 870MHz (Note 3) 38 MIN TYP 50 47 18 19 dB 31 23 dB MAX UNITS ns dB dB
LO Port Return Loss
IF Port Return Loss
AC ELECTRICAL CHARACTERISTICS (DOWNCONVERTER OPERATION)
(Typical Application Circuit, C5 = 3.3pF, L1 and C4 not used, VCC = +4.75V to +5.25V, RF and LO ports are driven from 50 sources, PLO = -3dBm to +3dBm, PRF = 0dBm, fRF = 815MHz to 1000MHz, fLO = 570MHz to 900MHz, fIF = 90MHz, fLO < fRF, TC = -40C to +85C, unless otherwise noted. Typical values are at VCC = +5V, PLO = 0dBm, fRF = 920MHz, fLO = 830MHz, fIF = 90MHz, TC = +25C, unless otherwise noted.) (Note 1)
PARAMETER Conversion Loss SYMBOL GC Flatness over any one of three frequency bands (fIF = 90MHz): fRF = 827MHz to 849MHz fRF = 869MHz to 894MHz fRF = 880MHz to 915MHz fRF = 920MHz to 960MHz Conversion Loss Variation Over Temperature Input Compression Point Input Third-Order Intercept Point Input IP3 Variation Over Temperature Output Third-Order Intercept Point P1dB IIP3 TC = +25C to -40C TC = +25C to +85C (Note 4) fRF1 = 920MHz, fRF2 = 921MHz, PRF = 0dBm/tone, PLO = 0dBm, TC = +25C (Note 3) TC = +25C to -40C TC = +25C to +85C fRF1 = 920MHz, fRF2 = 921MHz, PRF = 0dBm/tone, PLO = 0dBm, TC = +25C (Note 3) 2RF - 2LO, PRF = -10dBm, fRF = 920MHz to 960MHz (fLO = 830MHz to 870MHz), TC = +25C 3RF - 3LO, PRF = -10dBm Single sideband PBLOCKER = +8dBm PBLOCKER = +12dBm 26 33 -0.28 0.35 27 36.5 -0.6 0.4 30 CONDITIONS MIN TYP 6.5 MAX UNITS dB
Conversion Loss Flatness (Note 3)
0.2
dB 0.4 dB dBm dBm
IIP3
dB
OIP3
dBm
Spurious Response at IF (Note 3)
2x2 3x3
62
72 96 6.7 15 19
dBc
Noise Figure Noise Figure Under Blocking (Note 5)
NF
dB dB
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3
High-Linearity, 815MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2029
AC ELECTRICAL CHARACTERISTICS (UPCONVERTER OPERATION)
(Typical Application Circuit, L1 = 4.7nH, C4 = 4.7pF, C5 not used, VCC = +4.75V to +5.25V, RF and LO ports are driven from 50 sources, PLO = -3dBm to +3dBm, PIF = 0dBm, fRF = 815MHz to 1000MHz, fLO = 570MHz to 900MHz, fIF = 90MHz, fLO < fRF, TC = -40C to +85C, unless otherwise noted. Typical values are at VCC = +5V, PLO = 0dBm, fRF = 920MHz, fLO = 830MHz, fIF = 90MHz, TC = +25C, unless otherwise noted.) (Note 1)
PARAMETER Conversion Loss SYMBOL GC Flatness over any one of four frequency bands (fIF = 90MHz): fRF = 827MHz to 849MHz fRF = 869MHz to 894MHz fRF = 880MHz to 915MHz fRF = 920MHz to 960MHz TC = +25C to -40C TC = +25C to +85C P1dB IIP3 (Note 4) fIF1 = 90MHz, fIF2 = 91MHz (results in fRF1 = 920MHz, fRF2 = 921MHz), PIF = 0dBm/tone, PLO = 0dBm, TC = +25C (Note 3) TC = +25C to -40C TC = +25C to +85C 34 CONDITIONS MIN TYP 6 MAX UNITS dB
Conversion Loss Flatness
0.3
dB
Conversion Loss Variation Over Temperature Input Compression Point Input Third-Order Intercept Point Input IP3 Variation Over Temperature LO 2IF Spur LO 3IF Spur Output Noise Floor
-0.4 0.3 25 39 -0.6 -0.6 71 86
dB dBm dBm
IIP3
dB dBc dBc dBm/Hz
POUT = 0dBm (Note 5)
-167
Note 1: Note 2: Note 3: Note 4: Note 5:
All limits include external component losses. Output measurements are taken at IF or RF port of the Typical Application Circuit. Operation outside this range is possible, but with degraded performance of some parameters. Guaranteed by design. Compression point characterized. It is advisable not to continuously operate the mixer RF/IF inputs above +15dBm. Measured with external LO source noise filtered, so its noise floor is -174dBm/Hz at 100MHz offset. This specification reflects the effects of all SNR degradations in the mixer, including the LO noise as defined in Maxim Application Note 2021.
4
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High-Linearity, 815MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2029
Typical Operating Characteristics
(Typical Application Circuit, C5 = 3.3pF, L1 and C4 not used, VCC = +5.0V, PLO = 0dBm, PRF = 0dBm, fLO < fRF, fIF = 90MHz, unless otherwise noted.)
Downconverter Curves
CONVERSION LOSS vs. RF FREQUENCY
MAX2029 toc01
CONVERSION LOSS vs. RF FREQUENCY
MAX2029 toc02
CONVERSION LOSS vs. RF FREQUENCY
MAX2029 toc03
9
9
9
8 CONVERSION LOSS (dB)
CONVERSION LOSS (dB)
7
7
CONVERSION LOSS (dB)
TC = +85C
8
8
7
6
TC = -40C
TC = +25C
6
PLO = -3dBm, 0dBm, +3dBm
6
VCC = 4.75V, 5.0V, 5.25V
5
5
5
4 800 850 900 950 1000 RF FREQUENCY (MHz)
4 800 850 900 950 1000 RF FREQUENCY (MHz)
4 800 850 900 950 1000 RF FREQUENCY (MHz)
INPUT IP3 vs. RF FREQUENCY
MAX2029 toc04
INPUT IP3 vs. RF FREQUENCY
MAX2029 toc05
INPUT IP3 vs. RF FREQUENCY
VCC = 5.25V
MAX2029 toc06
42 40 INPUT IP3 (dBm) 38 36 TC = -40C 34 32 30 800 850 900 950 TC = +25C TC = +85C
42 40 INPUT IP3 (dBm) 38 36 34 32 30
42 40 INPUT IP3 (dBm) 38 36 34 32 30 VCC = 4.75V VCC = 5.0V
PLO = -3dBm, 0dBm, +3dBm
1000
800
850
900
950
1000
800
850
900
950
1000
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
NOISE FIGURE vs. RF FREQUENCY
MAX2029 toc07
NOISE FIGURE vs. RF FREQUENCY
MAX2029 toc08
NOISE FIGURE vs. RF FREQUENCY
MAX2029 toc09
10
10
10
9 NOISE FIGURE (dB)
NOISE FIGURE (dB)
PLO = -3dBm 8
NOISE FIGURE (dB)
TC = +25C
9
9 VCC = 4.75V, 5.0V, 5.25V
TC = +85C
8
8
7
7
7
6 TC = -40C 5 800 850 900 950 1000 RF FREQUENCY (MHz)
6
PLO = 0dBm, +3dBm
6
5 800 850 900 950 1000 RF FREQUENCY (MHz)
5 800 850 900 950 1000 RF FREQUENCY (MHz)
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5
High-Linearity, 815MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2029
Typical Operating Characteristics (continued)
(Typical Application Circuit, C5 = 3.3pF, L1 and C4 not used, VCC = +5.0V, PLO = 0dBm, PRF = 0dBm, fLO < fRF, fIF = 90MHz, unless otherwise noted.)
Downconverter Curves
2RF - 2LO RESPONSE vs. RF FREQUENCY
MAX2029 toc10
2RF - 2LO RESPONSE vs. RF FREQUENCY
MAX2029 toc11
2RF - 2LO RESPONSE vs. RF FREQUENCY
PRF = 0dBm VCC = 5.0V VCC = 4.75V
MAX2029 toc12
75 70 2RF - 2LO RESPONSE (dBc)
PRF = 0dBm TC = -40C, +25C, +85C
75 70 2RF - 2LO RESPONSE (dBc) 65 60 PLO = +3dBm 55 50 45
PRF = 0dBm PLO = -3dBm
75 70 2RF - 2LO RESPONSE (dBc) 65 60 VCC = 5.25V 55 50 45
65 60 55 50 45 800 850 900 950 1000 RF FREQUENCY (MHz)
PLO = 0dBm
800
850
900
950
1000
800
850
900
950
1000
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
3RF - 3LO RESPONSE vs. RF FREQUENCY
MAX2029 toc13
3RF - 3LO RESPONSE vs. RF FREQUENCY
MAX2029 toc14
3RF - 3LO RESPONSE vs. RF FREQUENCY
PRF = 0dBm 3RF - 3LO RESPONSE (dBc) 90 VCC = 5.25V VCC = 5.0V 80
MAX2029 toc15
100
PRF = 0dBm
100
PRF = 0dBm
100
3RF - 3LO RESPONSE (dBc)
90
TC = +25C TC = +85C
3RF - 3LO RESPONSE (dBc)
90 PLO = -3dBm, 0dBm, +3dBm 80
80
70
TC = -40C
70
70 VCC = 4.75V
60 800 850 900 950 1000 RF FREQUENCY (MHz)
60 800 850 900 950 1000 RF FREQUENCY (MHz)
60 800 850 900 950 1000 RF FREQUENCY (MHz)
INPUT P1dB vs. RF FREQUENCY
TC = +25C 29 INPUT P1dB (dBm) INPUT P1dB (dBm)
MAX2029 toc16
INPUT P1dB vs. RF FREQUENCY
MAX2029 toc17
INPUT P1dB vs. RF FREQUENCY
VCC = 5.0V 29 INPUT P1dB (dBm) VCC = 5.25V
MAX2029 toc18
31
31
31
29
PLO = -3dBm, 0dBm, +3dBm
27
TC = -40C
27
27 VCC = 4.75V 25
25
TC = +85C
25
23 800 850 900 950 1000 RF FREQUENCY (MHz)
23 800 850 900 950 1000 RF FREQUENCY (MHz)
23 800 850 900 950 1000 RF FREQUENCY (MHz)
6
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High-Linearity, 815MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2029
Typical Operating Characteristics (continued)
(Typical Application Circuit, C5 = 3.3pF, L1 and C4 not used, VCC = +5.0V, PLO = 0dBm, PRF = 0dBm, fLO < fRF, fIF = 90MHz, unless otherwise noted.)
Downconverter Curves
LO SWITCH ISOLATION vs. LO FREQUENCY
MAX2029 toc19
LO SWITCH ISOLATION vs. LO FREQUENCY
MAX2029 toc20
LO SWITCH ISOLATION vs. LO FREQUENCY
MAX2029 toc21
70
70
70
LO SWITCH ISOLATION (dB)
LO SWITCH ISOLATION (dB)
60 TC = -40C
60
LO SWITCH ISOLATION (dB)
60
50
TC = +85C TC = +25C
50 PLO = -3dBm, 0dBm, +3dBm
50 VCC = 4.75V, 5.0V, 5.25V
40 500 600 700 800 900 1000 LO FREQUENCY (MHz)
40 500 600 700 800 900 1000 LO FREQUENCY (MHz)
40 500 600 700 800 900 1000 LO FREQUENCY (MHz)
LO LEAKAGE AT IF PORT vs. LO FREQUENCY
MAX2029 toc22
LO LEAKAGE AT IF PORT vs. LO FREQUENCY
MAX2029 toc23
LO LEAKAGE AT IF PORT vs. LO FREQUENCY
VCC = 4.75V, 5.0V, 5.25V
MAX2029 toc24
-20 LO LEAKAGE AT IF PORT (dBm) TC = -40C -30 TC = +85C -40
-20 PLO = 0dBm, +3dBm LO LEAKAGE AT IF PORT (dBm) -30 PLO = -3dBm -40
-20 LO LEAKAGE AT IF PORT (dBm)
-30
-40
-50 TC = +25C -60 710 760 810 860 910 LO FREQUENCY (MHz)
-50
-50
-60 710 760 810 860 910 LO FREQUENCY (MHz)
-60 710 760 810 860 910 LO FREQUENCY (MHz)
LO LEAKAGE AT RF PORT vs. LO FREQUENCY
MAX2029 toc25
LO LEAKAGE AT RF PORT vs. LO FREQUENCY
MAX2029 toc26
LO LEAKAGE AT RF PORT vs. LO FREQUENCY
MAX2029 toc27
-15 TC = -40C LO LEAKAGE AT RF PORT (dBm) -20 -25 -30 -35 -40 -45 500 600 700
TC = +25C
-15 LO LEAKAGE AT RF PORT (dBm) -20 -25 -30 -35 -40 -45 PLO = -3dBm, 0dBm, +3dBm
-15 LO LEAKAGE AT RF PORT (dBm) -20 -25 -30 -35 -40 -45 VCC = 4.75V, 5.0V, 5.25V
TC = +85C
800
900
1000
500
600
700
800
900
1000
500
600
700
800
900
1000
LO FREQUENCY (MHz)
LO FREQUENCY (MHz)
LO FREQUENCY (MHz)
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7
High-Linearity, 815MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2029
Typical Operating Characteristics (continued)
(Typical Application Circuit, C5 = 3.3pF, L1 and C4 not used, VCC = +5.0V, PLO = 0dBm, PRF = 0dBm, fLO < fRF, fIF = 90MHz, unless otherwise noted.)
Downconverter Curves
RF-TO-IF ISOLATION vs. RF FREQUENCY
MAX2029 toc28
RF-TO-IF ISOLATION vs. RF FREQUENCY
MAX2029 toc29
RF-TO-IF ISOLATION vs. RF FREQUENCY
MAX2029 toc30
60 55 RF-TO-IF ISOLATION (dB) 50 45 TC = -40C 40 35 30 800 850 900 950 TC = +25C TC = +85C
60 55 RF-TO-IF ISOLATION (dB) 50 45 40 35 30
60 55 RF-TO-IF ISOLATION (dB) 50 45 VCC = 4.75V, 5.0V, 5.25V 40 35 30
PLO = -3dBm, 0dBm, +3dBm
1000
800
850
900
950
1000
800
850
900
950
1000
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF PORT RETURN LOSS vs. RF FREQUENCY
MAX2029 toc31
IF PORT RETURN LOSS vs. IF FREQUENCY
MAX2029 toc32
LO SELECTED RETURN LOSS vs. LO FREQUENCY
5 10 15 20 25 30 35 PLO = -3dBm PLO = 0dBm PLO = +3dBm
MAX2029 toc33
0 5 10 15 20 PLO = -3dBm, 0dBm, +3dBm 25 30 770 820 870 920 970
0 5 IF PORT RETURN LOSS (dB) 10 15 20 25 30 35 INCLUDES IF TRANSFORMER 40 VCC = 4.75V, 5.0V, 5.25V
0 LO SELECTED RETURN LOSS (dB)
RF PORT RETURN LOSS (dB)
40 0 100 200 300 400 500 500 600 700 800 900 1000 IF FREQUENCY (MHz) LO FREQUENCY (MHz)
1020
RF FREQUENCY (MHz)
LO UNSELECTED RETURN LOSS vs. LO FREQUENCY
MAX2029 toc34
SUPPLY CURRENT vs. TEMPERATURE (TC)
VCC = 5.25V SUPPLY CURRENT (mA) 90
MAX2029 toc35
0 LO UNSELECTED RETURN LOSS (dB) 5 10 15 20 25 30 35 40 500 600 700 800 900 PLO = -3dBm, 0dBm, +3dBm
100
80
VCC = 5.0V
70
VCC = 4.75V
60 1000 -40 -15 10 35 60 85 LO FREQUENCY (MHz) TEMPERATURE (C)
8
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High-Linearity, 815MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2029
Typical Operating Characteristics
(Typical Application Circuit, L1 = 4.7nH, C4 = 4.7pF, C5 not used, VCC = +5.0V, PLO = 0dBm, PIF = 0dBm, fRF = fLO + fIF, fIF = 90MHz, unless otherwise noted.)
Upconverter Curves
CONVERSION LOSS vs. RF FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc01
CONVERSION LOSS vs. RF FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc02
CONVERSION LOSS vs. RF FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc03
9 8 CONVERSION LOSS (dB) 7 6 5 TC = -40C 4 3 820 870 920 970 TC = +85C
9 8 CONVERSION LOSS (dB) 7 6 5 4 3 PLO = -3dBm, 0dBm, +3dBm
9 8 CONVERSION LOSS (dB) 7 6 5 4 3
TC = +25C
VCC = 4.75V, 5.0V, 5.25V
1020
820
870
920
970
1020
820
870
920
970
1020
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
INPUT IP3 vs. RF FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc04
INPUT IP3 vs. RF FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc05
INPUT IP3 vs. RF FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
VCC = 5.25V 45 INPUT IP3 (dBm) VCC = 5.0V 40
MAX2029 toc06
50 TC = -40C 45 TC = +25C INPUT IP3 (dBm) 40
50
50
45 INPUT IP3 (dBm)
40
35 TC = +85C
35 PLO = -3dBm, 0dBm, +3dBm 30
35 VCC = 4.75V 30
30
25 820 870 920 970 1020 RF FREQUENCY (MHz)
25 820 870 920 970 1020 RF FREQUENCY (MHz)
25 820 870 920 970 1020 RF FREQUENCY (MHz)
LO + 2IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc07
LO + 2IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc08
LO + 2IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
PIF = 0dBm LO + 2IF REJECTION (dBc) 80 VCC = 4.75V 70
MAX2029 toc09
90 PIF = 0dBm TC = -40C LO + 2IF REJECTION (dBc) 80 TC = +85C 70
90
PIF = 0dBm PLO = -3dBm
90
LO + 2IF REJECTION (dBc)
80
VCC = 5.25V
70
60
TC = +25C
60 PLO = +3dBm PLO = 0dBm
60
VCC = 5.0V
50 730 780 830 880 930 LO FREQUENCY (MHz)
50 730 780 830 880 930 LO FREQUENCY (MHz)
50 730 780 830 880 930 LO FREQUENCY (MHz)
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9
High-Linearity, 815MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2029
Typical Operating Characteristics (continued)
(Typical Application Circuit, L1 = 4.7nH, C4 = 4.7pF, C5 not used, VCC = +5.0V, PLO = 0dBm, PIF = 0dBm, fRF = fLO + fIF, fIF = 90MHz, unless otherwise noted.)
Upconverter Curves
LO - 2IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc10
LO - 2IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc11
LO - 2IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
PIF = 0dBm LO - 2IF REJECTION (dBc) 80 VCC = 4.75V 70 VCC = 5.0V
MAX2029 toc12
90 PIF = 0dBm LO - 2IF REJECTION (dBc) TC = -40C 80 TC = +25C 70 TC = +85C 60
90 PIF = 0dBm LO - 2IF REJECTION (dBc) 80 PLO = +3dBm PLO = -3dBm 70 PLO = 0dBm
90
60
60
VCC = 5.25V
50 730 780 830 880 930 LO FREQUENCY (MHz)
50 730 780 830 880 930 LO FREQUENCY (MHz)
50 730 780 830 880 930 LO FREQUENCY (MHz)
LO + 3IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc13
LO + 3IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc14
LO + 3IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
PIF = 0dBm LO + 3IF REJECTION (dBc) 90
MAX2029 toc15
100
PIF = 0dBm TC = +85C TC = -40C
100
PIF = 0dBm
100
LO + 3IF REJECTION (dBc)
90
LO + 3IF REJECTION (dBc)
90
80 TC = +25C 70
80 PLO = -3dBm, 0dBm, +3dBm 70
80 VCC = 4.75V, 5.0V, 5.25V 70
60 730 780 830 880 930 LO FREQUENCY (MHz)
60 730 780 830 880 930 LO FREQUENCY (MHz)
60 730 780 830 880 930 LO FREQUENCY (MHz)
LO - 3IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc16
LO - 3IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc17
LO - 3IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
VCC = 5.25V LO - 3IF REJECTION (dBc) 90 PIF = 0dBm
MAX2029 toc18
100 TC = +25C LO - 3IF REJECTION (dBc) 90
PIF = 0dBm
100
PIF = 0dBm
100
LO - 3IF REJECTION (dBc)
90
80
TC = -40C TC = +85C
80
PLO = -3dBm, 0dBm, +3dBm
80
VCC = 5.0V VCC = 4.75V
70
70
70
60 730 780 830 880 930 LO FREQUENCY (MHz)
60 730 780 830 880 930 LO FREQUENCY (MHz)
60 730 780 830 880 930 LO FREQUENCY (MHz)
10
______________________________________________________________________________________
High-Linearity, 815MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2029
Typical Operating Characteristics (continued)
(Typical Application Circuit, L1 = 4.7nH, C4 = 4.7pF, C5 not used, VCC = +5.0V, PLO = 0dBm, PIF = 0dBm, fRF = fLO + fIF, fIF = 90MHz, unless otherwise noted.)
Upconverter Curves
LO LEAKAGE AT RF PORT vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc19
LO LEAKAGE AT RF PORT vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc20
LO LEAKAGE AT RF PORT vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc21
-10 LO LEAKAGE AT RF PORT (dBm)
-10 LO LEAKAGE AT RF PORT (dBm)
-10 LO LEAKAGE AT RF PORT (dBm)
-20
TC = +25C
-20
-20
-30 TC = -40C -40 TC = +85C -50 730 780 830 880 930 LO FREQUENCY (MHz)
-30
PLO = -3dBm, 0dBm, +3dBm
-30
VCC = 4.75V, 5.0V, 5.25V
-40
-40
-50 730 780 830 880 930 LO FREQUENCY (MHz)
-50 730 780 830 880 930 LO FREQUENCY (MHz)
IF LEAKAGE AT RF vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc22
IF LEAKAGE AT RF vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc23
IF LEAKAGE AT RF vs. LO FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
MAX2029 toc24
-50
-50
-50
IF LEAKAGE AT RF (dBm)
IF LEAKAGE AT RF (dBm)
-70
TC = -40C
TC = +25C
-70 PLO = 0dBm, +3dBm -80
IF LEAKAGE AT RF (dBm)
-60
-60
-60
-70 VCC = 4.75V, 5.0V -80
-80
-90 TC = +85C -100 730 780 830 880 930 LO FREQUENCY (MHz)
-90 PLO = -3dBm -100 730 780 830 880 930 LO FREQUENCY (MHz)
-90 VCC = 5.25V -100 730 780 830 880 930 LO FREQUENCY (MHz)
RF PORT RETURN LOSS vs. RF FREQUENCY (L-C BPF TUNED FOR 940MHz RF FREQUENCY)
5 RF PORT RETURN LOSS (dB) 10 15 20 25 30 35 40 820 870 920 970 1020 RF FREQUENCY (MHz) THE L-C BPF ENHANCES PERFORMANCE IN THE UPCONVERTER MODE BUT LIMITS RF BANDWIDTH L1 AND C4 BPF REMOVED L1 AND C4 BPF INSTALLED
MAX2029 toc25
0
______________________________________________________________________________________
11
High-Linearity, 815MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2029
Pin Description
PIN 1, 6, 8, 14 2 3 4, 5, 10, 12, 13, 16, 17, 20 7 9 11 15 18, 19 EP NAME VCC RF TAP GND FUNCTION Power-Supply Connection. Bypass each VCC pin to GND with capacitors as shown in the Typical Application Circuit. Single-Ended 50 RF Input/Output. This port is internally matched and DC shorted to GND through a balun. Center Tap of the Internal RF Balun. Connect to ground. Ground. Connect to PCB ground plane for proper operation and improved pin-to-pin isolation.
LOBIAS Bias Resistor for Internal LO Buffer. Connect a 523 1% resistor from LOBIAS to the power supply. LOSEL LO1 LO2 IF-, IF+ GND Local Oscillator Select. Logic-control input for selecting LO1 or LO2. Local Oscillator Input 1. Drive LOSEL low to select LO1. Local Oscillator Input 2. Drive LOSEL high to select LO2. Differential IF Input/Outputs Exposed Ground Paddle. Solder the exposed paddle to the ground plane using multiple vias.
Detailed Description
The MAX2029 can operate either as a downconverter or an upconverter mixer. As a downconverter, the MAX2029 yields a 6.5dB conversion loss, a 6.7dB noise figure, and a +36.5dBm third-order input intercept point (IIP3). The integrated baluns and matching circuitry allow for 50 single-ended interfaces to the RF port and the two LO ports. The RF port can be used as an input for downconversion or an output for upconversion. A single-pole, double-throw (SPDT) switch provides 50ns switching time between the two LO inputs with 53dB of LO-to-LO isolation. Furthermore, the integrated LO buffer provides a high drive level to the mixer core, reducing the LO drive required at the MAX2029's inputs to a -3dBm to +3dBm range. The IF port incorporates a differential output for downconversion, which is ideal for providing enhanced IIP2 performance. For upconversion, the IF port is a differential input. Specifications are guaranteed over broad frequency ranges to allow for use in cellular band WCDMA, cdmaOneTM, cdma2000, and GSM 850/GSM 900 2.5G EDGE base stations. The MAX2029 is specified to operate over an 815MHz to 1000MHz RF frequency range, a 570MHz to 900MHz LO frequency range, and a DC to 250MHz IF frequency range. Operation beyond these ranges is possible; see the Typical Operating Characteristics for additional details. The MAX2029 is optimized for low-side LO injection architectures. However, the device can operate in high-side LO injection applications with an extended LO range, but performance degrades as fLO increases. See the Typical Operating Characteristics for measurements taken with
cdmaOne is a trademark of CDMA Development Group. 12
fLO up to 1000MHz. For a pin-compatible device that has been optimized for high-side LO injection, refer to the MAX2031 data sheet.
RF Port and Balun
For using the MAX2029 as a downconverter, the RF input is internally matched to 50, requiring no external matching components. A DC-blocking capacitor is required because the input is internally DC shorted to ground through the on-chip balun. The RF return loss is typically better than 15dB over the entire 815MHz to 1000MHz RF frequency range. For upconverter operation, the RF port is a single-ended output similarly matched to 50.
LO Inputs, Buffer, and Balun
The MAX2029 is optimized for low-side LO injection architectures with a 570MHz to 900MHz LO frequency range. For a device with a 960MHz to 1180MHz LO frequency range, refer to the MAX2031 data sheet. As an added feature, the MAX2029 includes an internal LO SPDT switch that can be used for frequency-hopping applications. The switch selects one of the two singleended LO ports, allowing the external oscillator to settle on a particular frequency before it is switched in. LO switching time is typically less than 50ns, which is more than adequate for nearly all GSM applications. If frequency hopping is not employed, set the switch to either of the LO inputs. The switch is controlled by a digital input (LOSEL): logic-high selects LO2, logic-low selects LO1. To avoid damage to the part, voltage MUST be applied to VCC before digital logic is applied to LOSEL (see the Absolute Maximum Ratings). LO1
______________________________________________________________________________________
High-Linearity, 815MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch
and LO2 inputs are internally matched to 50, requiring an 82pF DC-blocking capacitor at each input. A two-stage internal LO buffer allows a wide inputpower range for the LO drive. All guaranteed specifications are for a -3dBm to +3dBm LO signal power. The on-chip low-loss balun, along with an LO buffer, drives the double-balanced mixer. All interfacing and matching components from the LO inputs to the IF outputs are integrated on-chip. If the 1% bias resistor values are not readily available, substitute standard 5% values.
MAX2029
Layout Considerations
A properly designed PCB is an essential part of any RF/microwave circuit. Keep RF signal lines as short as possible to reduce losses, radiation, and inductance. For the best performance, route the ground-pin traces directly to the exposed pad under the package. The PCB exposed pad MUST be connected to the ground plane of the PCB. It is suggested that multiple vias be used to connect this pad to the lower-level ground planes. This method provides a good RF/thermal conduction path for the device. Solder the exposed pad on the bottom of the device package to the PCB. The MAX2029 evaluation kit can be used as a reference for board layout. Gerber files are available upon request at www.maxim-ic.com.
High-Linearity Mixer
The core of the MAX2029 is a double-balanced, highperformance passive mixer. Exceptional linearity is provided by the large LO swing from the on-chip LO buffer.
Differential IF
The MAX2029 mixer has a DC to 250MHz IF frequency range. Note that these differential ports are ideal for providing enhanced IIP2 performance. Single-ended IF applications require a 1:1 balun to transform the 50 differential IF impedance to 50 single-ended. Including the balun, the IF return loss is better than 15dB. The differential IF is used as an input port for upconverter operation. The user can use a differential IF amplifier following the mixer, but a DC block is required on both IF pins.
Power-Supply Bypassing
Proper voltage-supply bypassing is essential for highfrequency circuit stability. Bypass each VCC pin with the capacitors shown in the Typical Application Circuit. See Table 1.
Applications Information
Input and Output Matching
The RF and LO inputs are internally matched to 50. No matching components are required. As a downconverter, the return loss at the RF port is typically better than 15dB over the entire input range (815MHz to 1000MHz), and return loss at the LO ports are typically 15dB (570MHz to 850MHz). RF and LO inputs require only DC-blocking capacitors for interfacing. An optional L-C bandpass filter (BPF) can be installed at the RF port to improve upconverter performance. See the Typical Application Circuit and Typical Operating Characteristics for upconverter operation with an L-C BPF tuned for 920MHz RF frequency. Performance can be optimized at other frequencies by choosing different values for L1 and C4. Removing L1 and C4 altogether results in a broader match, but performance degrades. Contact factory for details. The IF output impedance is 50 (differential). For evaluation, an external low-loss 1:1 (impedance ratio) balun transforms this impedance to a 50 single-ended output (see the Typical Application Circuit).
Table 1. Typical Application Circuit Component List
COMPONENT C1, C2, C7, C8, C10, C11, C12 C3, C6, C9 C4* C5** L1* R1 T1 U1 VALUE 82pF 10nF 4.7pF 3.3pF 4.7nH 523 1:1 DESCRIPTION Microwave capacitors (0603) Microwave capacitors (0603) Microwave capacitor (0603) Microwave capacitor (0603) Inductor (0603) 1% resistor (0603) IF balun M/A-COM: MABAES0029
MAX2029 Maxim IC
*C4 and L1 installed only when mixer is used as an upconverter. **C5 installed only when mixer is used as a downconverter.
Exposed Pad RF/Thermal Considerations
The exposed paddle (EP) of the MAX2029's 20-pin thin QFN-EP package provides a low-thermal-resistance path to the die. It is important that the PCB on which the MAX2029 is mounted be designed to conduct heat from the EP. In addition, provide the EP with a lowinductance path to electrical ground. The EP MUST be soldered to a ground plane on the PCB, either directly or through an array of plated via holes.
13
Bias Resistor
Bias current for the LO buffer is optimized by fine tuning resistor R1. If reduced current is required at the expense of performance, contact the factory for details.
______________________________________________________________________________________
High-Linearity, 815MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2029
Typical Application Circuit
T1 1 3 4 5
IF
C5 GND GND 17 GND 16 C12 VCC C4 L1 RF TAP GND GND 1 2 3 4 E.P. 5 11 15 LO2 VCC GND GND LO1 C10 6 VCC 7 LOBIAS 8 VCC 9 LOSEL 10 GND LO1 C11 LO2 VCC 14 13 12 LOSEL C6 C7 VCC 20 C3 C1 RF C2
IF+ 19 C8
18
R1 VCC
IF-
MAX2029
VCC NOTE: L1 AND C4 USED ONLY FOR UPCONVERTER OPERATION. C5 USED ONLY FOR DOWNCONVERTER OPERATION.
C9
Chip Information
PROCESS: SiGe BiCMOS
14
______________________________________________________________________________________
High-Linearity, 815MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2029
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)
______________________________________________________________________________________
QFN THIN.EPS
15
High-Linearity, 815MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2029
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

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