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19-2489; Rev 1; 9/02
825MHz to 915MHz, SiGe High-Linearity Active Mixer
General Description
The MAX9982 fully integrated SiGe mixer is optimized to meet the demanding requirements of GSM850, GSM900, and CDMA850 base-station receivers. Each high-linearity device includes a local oscillator (LO) switch, LO driver, and active mixer. On-chip baluns are also integrated to allow for single-ended RF and LO inputs. Since the active mixer provides 2dB of conversion gain, the device effectively replaces the IF amplifier stage, which typically follows most passive mixer implementations. The MAX9982 provides exceptional linearity with an input IP3 of greater than +26dBm. The integrated LO driver allows for a wide range of LO drive levels from -5dBm to +5dBm. In addition, the built-in switch enables rapid LO selection of less than 250ns, as needed for GSM frequency-hopping applications. The MAX9982 is available in a 20-pin QFN package (5mm 5mm) with an exposed paddle and is specified over the -40C to +85C extended temperature range. o +26.8dBm Input IP3 o +13dBm Input 1dB Compression Point o 825MHz to 915MHz RF Frequency Range o 70MHz to 170MHz IF Frequency Range o 725MHz to 1085MHz LO Frequency Range o 2dB Conversion Gain o 12dB Noise Figure o -5dBm to +5dBm LO Drive o 5V Single-Supply Operation o Built-In LO Switch o ESD Protection o Internal RF and LO Baluns for Single-Ended Inputs
Features
MAX9982
Applications
GSM850/GSM900 2G and 2.5G EDGE Base Station Receivers Cellular cdmaOneTM and cdma2000TM Base Station Receivers TDMA and Integrated Digital Enhanced Network (iDEN)TM Base Station Receivers Digital and Spread-Spectrum Communication Systems Microwave Links
TOP VIEW
Ordering Information
PART MAX9982ETP TEMP RANGE -40C to +85C PIN-PACKAGE 20 QFN-EP* (5mm x 5mm)
*EP = exposed paddle.
Pin Configuration/ Functional Diagram
GND GND 17 GND
MAX9982
IF+ 19
20
18
IF-
Typical Application Circuit appears at end of data sheet. cdmaOne is a trademark of CDMA Development Group. cdma2000 is a trademark of Telecommunications Industry Association. iDEN is a trademark of Motorola, Inc.
RF TAP GND RFBIAS GND
1 2 3 4 5
16
15 14 13 12 11
LO2 GND GND GND LO1
LOSEL
GND
GND
VCC
QFN
________________________________________________________________ Maxim Integrated Products
VCC
10
6
7
8
9
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
825MHz to 915MHz, SiGe High-Linearity Active Mixer MAX9982
ABSOLUTE MAXIMUM RATINGS
VCC ........................................................................-0.3V to +5.5V IF+, IF-, RFBIAS, LOSEL.............................-0.3V to (VCC + 0.3V) TAP .....................................................................................+5.0V RFBIAS Current.....................................................................5mA RF, LO1, LO2 Input Power .............................................+20dBm Continuous Power Dissipation (TA = +70C) 20-Pin QFN (derate 20.8mW/C above TA = +70C) ....1.66W Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
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, all RF inputs and outputs terminated with 50, TA = -40C to +85C, unless otherwise noted. Typical values are at VCC = 5V, TA = +25C, unless otherwise noted.)
PARAMETER Supply Voltage Supply Current Input High Voltage Input Low Voltage LOSEL Input Current SYMBOL VCC ICC VIH VIL ILOSEL -5 CONDITIONS MIN 4.75 138 3.5 TYP 5.00 168 MAX 5.25 193 VCC + 0.3V 0.4 +5 UNITS V mA V V A
AC ELECTRICAL CHARACTERISTICS
(Typical Application Circuit, VCC = 4.75V to 5.25V, PLO = -5dBm to +5dBm, fRF = 825MHz to 915MHz, fLO = 725MHz to 1085MHz, TA = -40C to +85C, unless otherwise noted. Typical values at VCC = +5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 870MHz, fLO = 770MHz, TA = +25C, unless otherwise noted.) (Notes 1, 2)
PARAMETER RF Frequency LO Frequency IF Frequency LO Drive Level SYMBOL fRF fLO fIF PLO VCC = +5.0V, fIF = 100MHz, low-side injection, PRF = 0dBm, PLO = -5dBm Cellular band, fRF = 825MHz to 850MHz GSM band, fRF = 880MHz to 915MHz Must meet RF and LO frequency range; IF matching components affect IF frequency range CONDITIONS MIN 825 725 70 -5 2.6 dB 2.1 -0.0135 0.6 dB/C dB TYP MAX 915 1085 170 +5 UNITS MHz MHz MHz dBm
Conversion Gain (Note 3)
GC
Gain Variation Over Temperature Gain Variation from Nominal
TA = -40C to +85C fRF = 825MHz to 915MHz, 3
2
_______________________________________________________________________________________
825MHz to 915MHz, SiGe High-Linearity Active Mixer MAX9982
AC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, VCC = 4.75V to 5.25V, PLO = -5dBm to +5dBm, fRF = 825MHz to 915MHz, fLO = 725MHz to 1085MHz, TA = -40C to +85C, unless otherwise noted. Typical values at VCC = +5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 870MHz, fLO = 770MHz, TA = +25C, unless otherwise noted.) (Notes 1, 2)
PARAMETER Conversion Loss from LO to IF SYMBOL CONDITIONS Inject PIN = -20dBm at fLO + 100MHz into LO port; measure 100MHz at IF port as POUT; no RF signal at RF port NF P1dB IIP3 IIP3 Cellular band, fRF = 825MHz to 850MHz GSM band, fRF = 880MHz to 915MHz Low-side injection High-side injection VCC = +5.0V, PRF = 0dBm, PLO = -5dBm, TA = +25C (Notes 3, 4) TA = -40C to +85C fRF = 915, fLO = 815MHz, fSPUR = 865MHz, PRF = -5dBm fRF = 915, fLO = 815MHz, fSPUR = 848.3MHz, PRF = -5dBm PLO = +5dBm PLO = 0dBm PLO = +5dBm PLO = 0dBm MIN TYP 47 11.3 11.8 12.9 14.5 26.8 0.5 65 dBc 57 89 dBc 89 -40 -28 11 51 250 19 LO port active LO port inactive RF and LO terminated (Note 6) 20 12 15 dBm dBm dB dB ns dB dB dB MAX UNITS dB
Noise Figure Input 1dB Compression Point Input Third-Order Intercept Point Input Third-Order Intercept Point Variation Over Temperature
dB dBm dBm dB
2 RF - 2 LO Spur Rejection
2x2
3 RF - 3 LO Spur Rejection
3x3
Maximum LO Leakage at RF Port Maximum LO Leakage at IF Port Minimum RF to IF Isolation LO1 to LO2 Isolation LO Switching Time RF Return Loss LO Return Loss IF Return Loss
PLO = -5dBm to +5dBm, fLO = 725MHz to 1085MHz PLO = -5dBm to +5dBm, fLO = 725MHz to 1085MHz PLO = -5dBm to +5dBm, fRF = 825MHz to 915MHz fRF = 825MHz to 915MHz, PLO1 = PLO2 = +5dBm, fIF = 100MHz (Note 5) 50% of LOSEL to IF settled within 2
Note 1: Note 2: Note 3: Note 4: Note 5: Note 6:
Guaranteed by design and characterization. All limits reflect losses of external components. Output measurements taken at IF OUT of Typical Application Circuit. Production tested. Two tones at 1MHz spacing, 0dBm each at RF port. Measured at IF port at IF frequency. LO1 and LO2 are offset by 1MHz. IF return loss can be optimized by external matching components.
_______________________________________________________________________________________
3
825MHz to 915MHz, SiGe High-Linearity Active Mixer MAX9982
Typical Operating Characteristics
(Typical Application Circuit, VCC = 5V, fIF = 100MHz, PRF = -5dBm, PLO = 0dBm, TA = +25C, unless otherwise noted.)
CONVERSION GAIN vs. RF FREQUENCY LOW-SIDE INJECTION
MAX9982toc01 MAX9982toc02
BIAS CURRENT vs. TEMPERATURE
180 175 BIAS CURRENT (mA) 170 165 160 155 150 -40 -15 10 35 60 85 TEMPERATURE (C) VCC = 5V VCC = 4.75V VCC = 5.25V 4.0
CONVERSION GAIN vs. RF FREQUENCY HIGH-SIDE INJECTION
fIF = 120MHz 3.0 CONVERSION GAIN (dB) 2.5 2.0 1.5 1.0 0.5 TA = +25C TA = +85C TA = -40C
MAX9982toc03
3.5
fIF = 100MHz 3.5 CONVERSION GAIN (dB) 3.0 2.5 TA = +25C 2.0 1.5 1.0 820 840 860 880 900 TA = -40C
TA = +85C 920
820
840
860
880
900
920
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
CONVERSION GAIN vs. RF FREQUENCY LOW-SIDE INJECTION
fIF = 100MHz 2.8 CONVERSION GAIN (dB) 2.6 2.4 PLO = -5dBm, 0dBm, +5dBm 2.2 2.0 1.8 820 840 860 880 900 920 RF FREQUENCY (MHz)
MAX9982toc04
CONVERSION GAIN vs. RF FREQUENCY HIGH-SIDE INJECTION
MAX9982toc05
CONVERSION GAIN vs. RF FREQUENCY LOW-SIDE INJECTION
fIF = 100MHz 2.8 CONVERSION GAIN (dB) VCC = 4.75V 2.6 2.4 2.2 2.0 1.8 VCC = 5.25V VCC = 5V
MAX9982toc06
3.0
2.6 fIF = 120MHz 2.4 CONVERSION GAIN (dB)
3.0
2.2
2.0 PLO = -5dBm, 0dBm, +5dBm 1.8
1.6 820 840 860 880 900 920 RF FREQUENCY (MHz)
820
840
860
880
900
920
RF FREQUENCY (MHz)
2 RF - 2 LO vs. RF FREQUENCY LOW-SIDE INJECTION
MAX9982 toc07
2 LO - 2 RF RESPONSE vs. RF FREQUENCY HIGH-SIDE INJECTION
MAX9982 toc08
2 RF - 2 LO RESPONSE vs. RF FREQUENCY LOW-SIDE INJECTION
PRF = -5dBm fIF = 100MHz
MAX9982 toc09
80 PRF = -5dBm PLO = +5dBm fIF = 100MHz TA = -40C 70
58 PRF = -5dBm PLO = +5dBm fIF = 120MHz 56 TA = +85C 54 TA = +25C 52 TA = -40C
75 70 65 60 55 50 45 PLO = 0dBm PLO = +5dBm
2 RF - 2 LO RESPONSE (dBc)
2 LO - 2 RF RESPONSE (dBc)
65 TA = +25C 60 TA = +85C 55 820 840 860 880 900 920 RF FREQUENCY (MHz)
2 RF - 2 LO RESPONSE (dBc)
75
PLO = -5dBm
50 820 840 860 880 900 920 RF FREQUENCY (MHz)
820
840
860
880
900
920
RF FREQUENCY (MHz)
4
_______________________________________________________________________________________
825MHz to 915MHz, SiGe High-Linearity Active Mixer MAX9982
Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 5V, fIF = 100MHz, PRF = -5dBm, PLO = 0dBm, TA = +25C, unless otherwise noted.)
2 LO - 2 RF RESPONSE vs. RF FREQUENCY HIGH-SIDE INJECTION
MAX9982 toc10
INPUT IP3 vs. RF FREQUENCY LOW-SIDE INJECTION
MAX9982 toc11
INPUT IP3 vs. RF FREQUENCY HIGH-SIDE INJECTION
fIF = 120MHz 31 30 INPUT IP3 (dBm) 29 TA = +25C 28 27 TA = +85C 26 TA = -40C
MAX9982 toc12
60.0 57.5 55.0 52.5 PLO = +5dBm 50.0 PLO = -5dBm 47.5 45.0 820 840 860 880 900 PRF = -5dBm fIF = 120MHz PLO = 0dBm
29 fIF = 100MHz 28 INPUT IP3 (dBm) TA = +85C
32
2 LO - 2 RF RESPONSE (dBc)
27 TA = -40C 26 TA = +25C
25 920 820 840 860 880 900 920 RF FREQUENCY (MHz) RF FREQUENCY (MHz)
25 820 840 860 880 900 920 RF FREQUENCY (MHz)
INPUT IP3 vs. RF FREQUENCY LOW-SIDE INJECTION
MAX9982 toc13
INPUT IP3 vs. RF FREQUENCY HIGH-SIDE INJECTION
MAX9982 toc14
INPUT IP3 vs. RF FREQUENCY LOW-SIDE INJECTION
fIF = 100MHz 27.5 INPUT IP3 (dBm) VCC = 5.25V
MAX9982 toc15
28.0 fIF = 100MHz PLO = 0dBm INPUT IP3 (dBm) 27.5 PLO = -5dBm
30 PLO = -5dBm 29 PLO = 0dBm INPUT IP3 (dBm) 28 PLO = +5dBm fIF = 120MHz
28.0
27.0
27.0
PLO = +5dBm
27
26
26.5 VCC = 4.75V 26.0 820 840 860 880 900 920 820 840 860
VCC = 5.0V
26.5 820 840 860 880 900 920 RF FREQUENCY (MHz)
25 RF FREQUENCY (MHz)
880
900
920
RF FREQUENCY (MHz)
INPUT P1dB vs. RF FREQUENCY LOW-SIDE INJECTION
MAX9982 toc16
INPUT P1dB vs. RF FREQUENCY HIGH-SIDE INJECTION
MAX9982 toc17
INPUT P1dB vs. RF FREQUENCY LOW-SIDE INJECTION
fIF = 100MHz 13.25
MAX9982 toc18
14.0 fIF = 100MHz 13.5 INPUT P1dB (dBm)
16.0 fIF = 120MHz 15.5 INPUT P1dB (dBm) 15.0 14.5 TA = +25C 14.0 TA = -40C 13.5 TA = +85C
13.50
INPUT P1dB (dBm)
TA = +85C 13.0
PLO = -5dBm 13.00
12.5
TA = -40C
TA = +25C
12.75 PLO = +5dBm 12.50 PLO = 0dBm
12.0 820 840 860 880 900 920 RF FREQUENCY (MHz)
13.0 820 840 860 880 900 920 RF FREQUENCY (MHz)
820
840
860
880
900
920
RF FREQUENCY (MHz)
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5
825MHz to 915MHz, SiGe High-Linearity Active Mixer MAX9982
Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 5V, fIF = 100MHz, PRF = -5dBm, PLO = 0dBm, TA = +25C, unless otherwise noted.)
INPUT P1dB vs. RF FREQUENCY LOW-SIDE INJECTION
MAX9982 toc19
LO SWITCH ISOLATION vs. RF FREQUENCY LOW-SIDE INJECTION
MAX9982 toc20
LO SWITCH ISOLATION vs. RF FREQUENCY HIGH-SIDE INJECTION
LO OFFSET 1MHz fIF = 120MHz LO SWITCH ISOLATION (dB) 54
MAX9982 toc21
14.0 fIF = 100MHz 13.5 INPUT P1dB (dBm) VCC = 5.25V
54 LO OFFSET 1MHz fIF = 100MHz LO SWITCH ISOLATION (dB) 53 TA = +85C 52
55
53
TA = +85C
13.0 VCC = 5V 12.5 VCC = 4.75V 12.0 820 840 860 880 900 920 RF FREQUENCY (MHz)
51 TA = +25C TA = -40C 50
52 TA = +25C 51 TA = -40C
49 820 840 860 880 900 920 RF FREQUENCY (MHz)
50 820 840 860 880 900 920 RF FREQUENCY (MHz)
LO SWITCH ISOLATION vs. RF FREQUENCY LOW-SIDE INJECTION
MAX9982 toc22
LO LEAKAGE AT IF PORT vs. LO FREQUENCY
MAX9982 toc23
LO LEAKAGE AT IF PORT vs. LO FREQUENCY
MAX9982 toc24
54 LO OFFSET 1MHz fIF = 100MHz LO SWITCH ISOLATION (dB) 53 PLO = -5dBm
-30.0 -32.5 TA = -40C LO LEAKAGE (dBm) -35.0 -37.5 -40.0 -42.5 TA = +85C -45.0 TA = +25C
-20 PLO = +5dBm -30 LO LEAKAGE (dBm)
52
-40 PLO = 0dBm PLO = -5dBm -50
51 PLO = 0dBm PLO = +5dBm 50
49 820 840 860 880 900 920 RF FREQUENCY (MHz)
-60 725 825 925 1025 1125 725 825 925 1025 1125 LO FREQUENCY (MHz) LO FREQUENCY (MHz)
LO LEAKAGE AT RF PORT vs. LO FREQUENCY
MAX9982 toc25
RF LEAKAGE AT IF PORT vs. RF FREQUENCY
TA = -40C
MAX9982 toc26
RF LEAKAGE AT IF PORT vs. RF FREQUENCY
MAX9982 toc27
-38 PLO = +5dBm PLO = 0dBm -42 PLO = -5dBm
-10 -12 RF LEAKAGE (dBc) -14 -16 TA = +25C -18 -20 -22 TA = +85C
-10
-40 LO LEAKAGE (dBm)
-12 RF LEAKAGE (dBc) PLO = -5dBm, 0dBm, +5dBm -14
-44
-16
-46
-18
-48 700 800 900 1000 1100 LO FREQUENCY (MHz)
-20 820 840 860 880 900 920 820 840 860 880 900 920 RF FREQUENCY (MHz) RF FREQUENCY (MHz)
6
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825MHz to 915MHz, SiGe High-Linearity Active Mixer MAX9982
Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC = 5V, fIF = 100MHz, PRF = -5dBm, PLO = 0dBm, TA = +25C, unless otherwise noted.)
NOISE FIGURE vs. RF FREQUENCY LOW-SIDE INJECTION
MAX9982 toc28
NOISE FIGURE vs. RF FREQUENCY HIGH-SIDE INJECTION
MAX9982 toc29
RF RETURN LOSS vs. RF FREQUENCY
MAX9982 toc30
14 SINGLE SIDEBAND 13 NOISE FIGURE (dB) TA = +25C 12 TA = -40C TA = +85C
16 SINGLE SIDEBAND TA = +85C 15 NOISE FIGURE (dB)
0 5 RETURN LOSS (dB) 10 PLO = -5dBm, 0dBm, +5dBm 15 20 25
14
11
13
TA = +25C
10
12 TA = -40C
9 820 840 860 880 900 920 RF FREQUENCY (MHz)
11 820 840 860 880 900 920 RF FREQUENCY (MHz)
30 820 840 860 880 900 920 RF FREQUENCY (MHz)
LO RETURN LOSS vs. LO FREQUENCY
MAX9982 toc31
IF RETURN LOSS vs. IF FREQUENCY
IF MATCH IS TUNED FOR 70MHz. MATCHING FOR HIGHER FREQUENCIES IS POSSIBLE.
MAX9982 toc32
0 5 RETURN LOSS (dB) 10 PLO = -5dBm 15 PLO = +5dBm 20 25 PLO = 0dBm 30 700 800 900 1000 MEASURED ON LO1 PORT LOSEL IS LOGIC HIGH (LO1 INPUT SELECTED)
0 5 RETURN LOSS (dB) 10 15 20 25 30
1100
70
90
110
130
150
170
LO FREQUENCY (MHz)
IF FREQUENCY (MHz)
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7
825MHz to 915MHz, SiGe High-Linearity Active Mixer MAX9982
Pin Description
PIN 1 2 3, 5, 7, 9, 12, 13, 14, 16, 17, 20, EP 4 6, 10 8 11 15 18, 19 NAME RF TAP GND FUNCTION RF Input. This input is internally matched to 50 and is DC shorted to ground. RF Balun Center Tap. Connect bypass capacitors from this pin to ground. Ground Bias control for the mixer. Connect a 249 resistor from this pin to ground to set the bias current for the mixer. Power-Supply Connections. Connect a 0.1F bypass capacitor from each VCC pin to ground. Local Oscillator Select. Set this pin to logic HIGH to select LO1; set to logic LOW to select LO2. Local Oscillator Input 1. This input is internally matched to 50 and is DC shorted to ground when selected. Requires a DC-blocking capacitor. Local Oscillator Input 2. This input is internally matched to 50 and is DC shorted to ground when selected. Differential IF Output. Connect 560nH pullup inductors and 137 pullup resistors from each of these pins to VCC for a 70MHz to 120MHz IF range.
RFBIAS VCC LOSEL LO1 LO2 IF-, IF+
Table 1. Component List
COMPONENT C1, C2, C6, C7 C3 C4, C5 C8, C11 C9, C10 L1, L2 R1 R3, R4 T1 U1 VALUE 33pF 0.033F 0.1F 220pF 330pF 560nH 249 1% 137 1% 4:1 (200:50) -- SIZE 0603 0603 0603 0603 0603 1008 0603 0603 -- 20-pin 5mm x 5mm QFN PART Murata GRM1885C1H330J Murata GRM188R71E333K Murata GRM188FS1E104Z Murata GRM1885C1H221J Murata GRM1885C1H331J Coilcraft 1008CS-561XJBB Panasonic ERJ-3EKF2490V Panasonic ERJ-3EKF1370V Mini-Circuits TC4-1W-7A MAX9982ETP
Detailed Description
The MAX9982 downconverter mixer is designed for GSM and CDMA base station receivers with an RF frequency between 825MHz and 915MHz. It implements an active mixer that provides 2dB of overall conversion gain to the receive path, removing the need for an additional IF amplifier. The mixer has excellent input IP3 measuring +26.8dBm. The device also features integrated RF and LO baluns that allow the mixers to be driven with single-ended signals.
8
RF Inputs
The MAX9982 has one input (RF) that is internally matched to 50 requiring no external matching components. A 33pF DC-blocking capacitor is required at the input since the input is internally DC shorted to ground through a balun. The input frequency range is 825MHz to 915MHz.
LO Inputs
The mixer can be used for either high-side or low-side injection applications with an LO frequency range of
_______________________________________________________________________________________
825MHz to 915MHz, SiGe High-Linearity Active Mixer
725MHz to 1085MHz. An internal LO switch allows for switching between two single-ended LO ports; this is useful for fast frequency changes/frequency hopping. LO switching time is typically less than 250ns. The switch is controlled by a digital input (LOSEL) that when high, selects LO1 and when low, selects LO2. Internal LO buffers allow for a wide power range on the LO ports. The LO signal power can vary from -5dBm to +5dBm. LO1 and LO2 are internally matched to 50, so only a 33pF DC-blocking capacitor is required at each LO port.
Bias Circuitry
Connect a bias resistor from RFBIAS to ground to set the mixer bias current. A nominal resistor value of 249 sets an input IP3 of +26.8dBm and supply current of 168mA.
MAX9982
Applications Information
Layout Considerations
A properly designed PC board is an essential part of any RF/microwave circuit. Keep RF signal lines as short as possible to reduce losses, radiation, and inductance. For best performance, route the ground pin traces directly to the exposed paddle underneath the package. Solder the exposed pad on the bottom of the device package evenly to the board ground plane to provide a heat transfer path along with RF grounding. If the PC board ground plane is not immediately available on the top metal layer, provide multiple vias between the exposed paddle connection and the PC board ground plane.
IF Outputs
This mixer has an IF frequency range of 70MHz to 170MHz. The differential IF output ports require external pullup inductors to VCC to resonate out the differential on-chip capacitance of 1.8pF. See the Typical Application Circuit for recommended component values for an IF optimized for 70MHz to 100MHz. Higher IF frequencies can be optimized by reducing the values of L1 and L2. Removing the ground plane from underneath L1 and L2 reduces parasitic capacitive loading and improves VSWR.
Power-Supply Bypassing
Proper voltage supply bypassing is essential for highfrequency circuit stability. Bypass each VCC pin with a 0.1F capacitor. Bypass TAP by placing a 33pF (C2) to ground within 100 mils of the TAP pin.
Chip Information
TRANSISTOR COUNT: 179 PROCESS: BiCMOS
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9
825MHz to 915MHz, SiGe High-Linearity Active Mixer MAX9982
Typical Application Circuit
C9 L1 5V C8 L2 C11 R4 R3
3 2 1
T1
6
IF OUT
4:1 (200:50) TRANSFORMER 4
C10 GND GND 17 GND IF+ 19 IF18
20
C1 RFIN C3 C2
RF TAP GND RFBIAS
MAX9982
1 2 3 4 5 15 14 13 12 11
16
LO2 GND GND GND LO1 C6 C7
LO2
R1
GND
LO1
LOSEL
GND
GND
VCC
5V C4 LO SELECT
VCC
10 5V C5
6
7
8
10
______________________________________________________________________________________
9
825MHz to 915MHz, SiGe High-Linearity Active Mixer MAX9982
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
L
REV.
0.15 C A
D2
C L
D
b D2/2
0.10 M C A B
PIN # 1 I.D.
D/2
0.15 C B
k
PIN # 1 I.D. 0.35x45
E/2 E2/2 E (NE-1) X e
C L
E2
k L
DETAIL A
e (ND-1) X e
C L
C L
L
e 0.10 C A 0.08 C
e
C
A1 A3
PROPRIETARY INFORMATION TITLE:
PACKAGE OUTLINE 16, 20, 28, 32L, QFN THIN, 5x5x0.8 mm
APPROVAL DOCUMENT CONTROL NO.
21-0140
C
1 2
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11
825MHz to 915MHz, SiGe High-Linearity Active Mixer MAX9982
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.)
COMMON DIMENSIONS
EXPOSED PAD VARIATIONS
NOTES: 1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994. 2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES. 3. N IS THE TOTAL NUMBER OF TERMINALS. 4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED WITHIN THE ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE. 5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.25 mm AND 0.30 mm FROM TERMINAL TIP. 6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY. 7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION. 8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS. 9. DRAWING CONFORMS TO JEDEC MO220. 10. WARPAGE SHALL NOT EXCEED 0.10 mm.
PROPRIETARY INFORMATION TITLE:
PACKAGE OUTLINE 16, 20, 28, 32L, QFN THIN, 5x5x0.8 mm
APPROVAL DOCUMENT CONTROL NO. REV.
21-0140
C
2 2
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.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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