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 19-0512; Rev 0; 6/06
KIT ATION EVALU LE B AVAILA
700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer
General Description
The MAX2058 high-linearity digital-variable-gain amplifier (DVGA) is designed to provide 62dB of total gain range and typical output IP3 and output P1dB levels of +32.3dBm and +19dBm, respectively. The device is ideal for a variety of applications, including RFID handheld and portal readers, as well as single and multicarrier 700MHz to 1200MHz GSM/EDGE, cdma2000 (R), WCDMA, and iDEN (R) base stations. The MAX2058 yields a high level of component integration, which includes two 5-bit, 31dB digital attenuators, a two-stage driver amplifier, a loopback mixer, and a serial interface to control the attenuators. The MAX2058 is pin compatible with the MAX2059 1800MHz to 2200MHz DVGA, facilitating an easy design-in for applications where a common PC board layout is used for both frequency bands. The MAX2058 is available in a 40-pin thin QFN package with an exposed paddle. Electrical performance is guaranteed over a -40C to +85C temperature range. o +32.3dBm Typical Output IP3 o +19dBm Typical Output 1dB Compression Point o 700MHz to 1200MHz RF Frequency Range o 1800MHz to 2200MHz RF Frequency Range (MAX2059) o 10.5dB Typical Small-Signal Gain o Includes Two Independent 31dB Attenuator Stages, Yielding 62dB of Total Gain-Control Range with 1dB Steps o 3-Wire SPITM/MICROWIRETM-Compatible o Integrated Loopback Mixer for Tx/Rx SelfDiagnostics o +5V Single-Supply Operation o External Current-Setting Resistors for Scalable Device Power o Lead-Free Package Available
Features
MAX2058
Applications
GSM 850/GSM 900 2G and 2.5G EDGE BaseStation Transmitters and Power Amplifiers Cellular cdmaOneTM, cdma2000, and Integrated Digital Enhanced Network (iDEN) Base-Station Transmitters and Power Amplifiers WCDMA 850MHz and Other 3G Base-Station Transmitters and Power Amplifiers Transmitter Gain Control Receiver Gain Control Broadband Systems Automatic Test Equipment Digital and Spread-Spectrum Communication Systems Microwave Terrestrial Links RFID Handheld and Portal Readers
SPI is a trademark of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. cdma2000 is a registered trademark of Telecommunications Industry Association. iDEN is a registered trademark of Motorola, Inc. cdmaOne is a trademark of CDMA Development Group.
Ordering Information
PART MAX2058ETL MAX2058ETL-T MAX2058ETL+ TEMP RANGE -40C to +85C -40C to +85C -40C to +85C PIN-PACKAGE PKG CODE
40 Thin QFN-EP** T4066-3 (6mm x 6mm) 40 Thin QFN-EP** T4066-3 (6mm x 6mm) 40 Thin QFN-EP** T4066-3 (6mm x 6mm) 40 Thin QFN-EP** T4066-3 (6mm x 6mm)
MAX2058ETL+T -40C to +85C
**EP = Exposed paddle. +Denotes lead-free package. T = Tape-and-reel.
Pin Configuration/Functional Diagram appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products
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.
700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer
MAX2058
ABSOLUTE MAXIMUM RATINGS
VCC to GND ...........................................................-0.3V to +5.5V RSET1, RSET2......................................................+1.2V to +4.0V LBBIAS .......................................................(VCC - 1.5V) to +5.5V LB_EN, DATA, CS, CLK .............................-0.3V to (VCC + 0.3V) ATTEN_INA, ATTEN_INB, ATTEN_OUTA, ATTEN_OUTB Input Power .................................................................+24dBm AMPIN, Differential LO Input Power ...............................+12dBm Continuous Power Dissipation (TA = +70C) 40-Pin TQFN (derated 26.3mW/C above +70C) ......2100mW Operating Temperature Range (Note A) .............-40C to +85C Junction Temperature ......................................................+150C JC ....................................................................................10C/W JA ....................................................................................38C/W Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
Note A: TC is the temperature on the exposed paddle of the package.
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
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, R1 = 1.2k, R2 = 3.92k, R3 = 2k, TC = -40C to +85C. Typical values are at VCC = +5.0V and TC = +25C, unless otherwise noted.) (Note 1)
PARAMETER Supply Voltage Total Supply Current SYMBOL V CC ICC CONDITIONS Reference to VCC, VCCLB, VCCLOGIC, VCCBIAS1, VCCBIAS2, VCCAMP LB mixer disabled (LB_EN = 1) LB mixer enabled (LB_EN = 0) 2.4 0.8 0.01 0.01 MIN 4.75 TYP 5.0 134 158 MAX 5.25 156 186 UNITS V mA
LOGIC INPUTS (DATA, CS, CLK, LB_EN) Input High Voltage Input Low Voltage Input Current with Logic-High Input Current with Logic-Low VIH V IL IIH IIL V V A A
AC ELECTRICAL CHARACTERISTICS
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz fRF 1200MHz, 40MHz fLO 100MHz, TC = -40C to +85C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, PLO = -6dBm, fLO = 45MHz, fLBOUT = fRF - fLO, and TC = +25C, unless otherwise noted.) (Note 1)
PARAMETER RF Frequency (Note 2) Small-Signal Gain Gain Variation vs. Temperature Output Power Output Power Flatness Attenuation Range Output Third-Order Intercept Point OIP3 Two tones: fRF1 = 940MHz, fRF2 = 941MHz, POUT1 = POUT2 = +5dBm POUT AV SYMBOL MAX2058 MAX2059 fRF = 940MHz, TC = +25C All attenuation settings TC = -40C to +25C TC = +25C to +85C 8.4 800MHz to 900MHz 900MHz to 1000MHz CONDITIONS MIN 700 1800 8.4 10.5 -0.014 -0.021 10.5 0.13 -0.52 62 32.3 12.8 TYP MAX 1200 2200 12.8 UNITS MHz dB dB/C dBm dB dB dBm
PIN = 0dBm, fRF = 940MHz, TC = +25C PIN = 0dBm
2
_______________________________________________________________________________________
700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz fRF 1200MHz, 40MHz fLO 100MHz, TC = -40C to +85C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, PLO = -6dBm, fLO = 45MHz, fLBOUT = fRF - fLO, and TC = +25C, unless otherwise noted.) (Note 1)
PARAMETER Output -1dB Compression Point (Note 3) RMS Error Vector Magnitude Spurious Emissions in 30kHz Bandwidth (Note 4) Noise Figure Input Return Loss Output Return Loss 5-BIT DIGITAL ATTENUATORS Insertion Loss Attenuator measured separately ZS = ZL = 50 IIP3 Attenuator measured separately ZS = ZL = 50, two tones: fRF1 = 940MHz, fRF2 = 941MHz, PIN1 = PIN2 = +5dBm 800MHz to 900MHz 900MHz to 1000MHz 800MHz to 1000MHz, TC = -40C to +25C 800MHz to 1000MHz, TC = +25C to +85C 3.3 dB NF 50 source, minimum attenuation setting 50 load, minimum attenuation setting SYMBOL OP1dB EVM POUT = +12dBm, EDGE modulation 200kHz offset POUT = +12dBm, EDGE modulation 400kHz offset 600kHz offset 1.2MHz offset CONDITIONS MIN TYP 19 0.5 -39.2 -73.5 -82.7 -85.7 6.8 18 20 dB dB dB dBc MAX UNITS dBm %
MAX2058
Input Third-Order Intercept Point Control Range Attenuation Step Size Variation vs. Frequency
44 31 0.08 0.06 0.002
dBm dB dB
Attenuation Variation vs. Temperature Step Size Relative Step Accuracy Absolute Step Accuracy
dB/C 0.003 1 -0.2 +0.4 -0.2 +0.5 dB dB dB
800MHz to 1000MHz 800MHz to 1000MHz No RF input, attenuator A stepped from 0 to 2dB, 7dB to 9dB, 15dB to 17dB, 0 to 31dB, 31dB to 0dB, with attenuator B at 0dB; attenuator B stepped from 0 to 2dB, 7dB to 9dB, 15dB to 17dB, 0 to 31dB, 31dB to 0dB, with attenuator A at 0dB From chip select transitioning high to the output settling to within 1dB of steady state output
Spurious Emissions in 300kHz Bandwidth (Note 5)
-85
dBm
Switching Speed
0.3
s
_______________________________________________________________________________________
3
700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer
MAX2058
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz fRF 1200MHz, 40MHz fLO 100MHz, TC = -40C to +85C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, PLO = -6dBm, fLO = 45MHz, fLBOUT = fRF - fLO, and TC = +25C, unless otherwise noted.) (Note 1)
PARAMETER LOOPBACK MIXER LO Frequency (Note 2) LO Input Power Output Power (Note 6) Gain Accuracy Output Third-Order Intercept Point (Note 6) Output Noise Floor ON/OFF Switching Time LBOUT to ATTEN_OUTB Isolation ATTEN_OUTB to LBOUT Isolation Output Return Loss LO Port Return Loss SERIAL PERIPHERAL INTERFACE (SPI) Maximum Clock Speed Data to Clock Setup Time Data to Clock Hold Time Clock to CS Setup Time CS Positive Pulse Width CS Negative Pulse Width CLOCK Pulse Width tCS tCH tES tEW tEWN tCW 38 1 9 4 18 24 13 MHz ns ns ns ns ns ns OIP3 fLO PLO P IN = +5dBm, fRF = 940MHz, TC = +25C P IN = +5dBm, TC = -40C to +25C 800MHz to 900MHz 900MHz to 1000MHz -14.7 40 -6 -12.7 1.7 1.7 10.6 -137 0.12 0.12 67 50 22 23 32 100 0 -10.8 MHz dBm dBm dB dBm dBc/Hz s dB dB dB dB SYMBOL CONDITIONS MIN TYP MAX UNITS
Two tones: fRF1 = 940MHz, fRF2 = 940.2MHz, PIN1 = PIN2 = +2dBm, TC = +25C P IN = +5dBm LB_EN enable time LB_EN disable time Mixer enabled, attenuators A and B both set to 31dB, PIN = +5dBm Mixer disabled, PIN = 0dBm Mixer enabled, 50 load Mixer disabled, 50 load 50 source
Note 1: All limits include external component losses. Output measurements taken at RFOUT or LBOUT ports of the Typical Application Circuit. Note 2: Operating outside this range is possible, but with degraded performance of some parameters. Note 3: Compression point characterized. It is advisable not to continuously operate the VGA RF input above +15dBm. Note 4: Input RF source contribution to spurious emissions (Agilent ESG 4435B, PSA E4443A): 200kHz = -39.2dBc, 400kHz = -73.5dBc, 600kHz = -83.2dBc, 1.2MHz = -85.7dBc Note 5: No SPI clock input applied. Note 6: Guaranteed by design and characterization.
4
_______________________________________________________________________________________
700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer
Typical Operating Characteristics
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz fRF 1200MHz, 40MHz fLO 100MHz, TC = -40C to +85C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT = fRF - fLO, and TC = +25C, unless otherwise noted.) GAIN vs. RF FREQUENCY GAIN vs. RF FREQUENCY GAIN vs. RF FREQUENCY ADJUSTING ATTEN A (MAXIMUM GAIN) (MAXIMUM GAIN)
MAX2058 toc01
MAX2058
12 11
GAIN (dB)
TC = +5C TC = -40C
12 11
VCC = 5.25V
MAX2058 toc02
5
GAIN (dB)
GAIN (dB)
10 9 8 7 6 700 800 900 1000 1100 RF FREQUENCY (MHz) 1200 TC = +25C TC = +85C
10 9 8 7 6 700
VCC = 5.0V VCC = 4.75V
-5
-15
-25
800 900 1000 1100 1200
700
800
RF FREQUENCY (MHz)
900 1000 1100 RF FREQUENCY (MHz)
1200
ATTEN A ABS ACCURACY vs. RF FREQUENCY
MAX2058 toc04
ATTEN A REL ACCURACY vs. RF FREQUENCY
MAX2058 toc05
GAIN vs. RF FREQUENCY ADJUSTING ATTEN B
MAX2058 toc06
1.0
1.0
15
0.5
ERROR (dB) ERROR (dB)
0.5
GAIN (dB)
5
0
0
-5
-0.5
-0.5
-15
-1.0 700 800 900 1000 1100 RF FREQUENCY (MHz) 1200
-1.0 700 800 900 1000 1100 RF FREQUENCY (MHz) 1200
-25 700 800 900 1000 1100 RF FREQUENCY (MHz) 1200
ATTEN B ABS ACCURACY vs. RF FREQUENCY
MAX2058 toc07
ATTEN B REL ACCURACY vs. RF FREQUENCY
MAX2058 toc08
OUTPUT IP3 vs. RF FREQUENCY
TC = +5C TC = -40C 33
OUTPUT IP3 (dBm)
MAX2058 toc09
1.0
1.0
34
0.5
ERROR (dB)
0.5
ERROR (dB)
32
0
0
31
TC = +25C TC = +85C
-0.5
-0.5
30
-1.0 700
-1.0 800 900 1000 1100 RF FREQUENCY (MHz) 1200 700 800 900 1000 1100 RF FREQUENCY (MHz) 1200
29 800 850 900 950 RF FREQUENCY (MHz) 1000
_______________________________________________________________________________________
MAX2058 toc03
13
13
15
5
700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer
MAX2058
Typical Operating Characteristics (continued)
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz fRF 1200MHz, 40MHz fLO 100MHz, TC = -40C to +85C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT = fRF - fLO, and TC = +25C, unless otherwise noted.)
OUTPUT IP3 vs. RF FREQUENCY
MAX2058 toc10
NOISE FIGURE vs. RF FREQUENCY
TC = +85C TC = +25C
MAX2058 toc11
NOISE FIGURE vs. RF FREQUENCY
MAX2058 toc12
34 VCC = 5.25V 33
OUTPUT IP3 (dBm)
10 9
NOISE FIGURE (dB)
10 9 VCC = 5.25V
NOISE FIGURE (dB)
8 7 6 5 TC = -40C 4 TC = +5C
8 7 6
32
VCC = 5.0V
31
VCC = 5.0V
VCC = 4.75V
VCC = 4.75V 5 4
30
29 800 850 900 950 RF FREQUENCY (MHz) 1000
700
800
900 1000 1100 RF FREQUENCY (MHz)
1200
700
800
900 1000 1100 RF FREQUENCY (MHz)
1200
OUTPUT P1dB vs. RF FREQUENCY
MAX2058 toc13
OUTPUT P1dB vs. RF FREQUENCY
21 20
OUTPUT P1dB (dBm)
INPUT RETURN LOSS vs. RF FREQUENCY ATTEN A VARIED
MAX2058 toc14 MAX2058 toc15
22 21 20
OUTPUT P1dB (dBm)
22 VCC = 5.25V
0 5
INPUT RETURN LOSS (dB)
TC = -40C
TC = +5C
0dB 2dB 4dB
19 18 17 16 15 14 700 800 900 1000 1100 RF FREQUENCY (MHz) 1200 TC = +85C TC = +25C
19 18 VCC = 5.0V 17 16 15 14 700 800 900 1000 1100 RF FREQUENCY (MHz) 1200 VCC = 4.75V
10 15 20 25
16dB, 31dB 30 700 800
8dB
1dB 1200
900 1000 1100 RF FREQUENCY (MHz)
INPUT RETURN LOSS vs. RF FREQUENCY ATTEN B VARIED
MAX2058 toc16
OUTPUT RETURN LOSS vs. RF FREQUENCY ATTEN A VARIED
MAX2058 toc17
OUTPUT RETURN LOSS vs. RF FREQUENCY ATTEN B VARIED
MAX2058 toc18
0 5
INPUT RETURN LOSS (dB)
0
0 16dB, 31dB
OUTPUT RETURN LOSS (dB)
OUTPUT RETURN LOSS (dB)
10 31dB 20
10 4dB 20
10 31dB 15 20 0dB, 1dB 25
30 0dB
30
2dB 0dB 1dB 700 800
8dB
30 700 800 900 1000 1100 RF FREQUENCY (MHz) 1200
40 700 800 900 1000 1100 RF FREQUENCY (MHz) 1200
40
900 1000 1100 RF FREQUENCY (MHz)
1200
6
_______________________________________________________________________________________
700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer
Typical Operating Characteristics (continued)
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz fRF 1200MHz, 40MHz fLO 100MHz, TC = -40C to +85C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT = fRF - fLO, and TC = +25C, unless otherwise noted.)
REVERSE GAIN vs. RF FREQUENCY ADJUSTING ATTEN A AND B
MAX2058 toc19
MAX2058
MIXER CONV LOSS vs. RF FREQUENCY
TC = +85C 19
CONVERSION LOSS (dB)
MAX2058 toc20
MIXER CONV LOSS vs. RF FREQUENCY
MAX2058 toc21
-30
20 TC = +25C
20 19
CONVERSION LOSS (dB)
-40 ATTEN A AND B, 0dB
GAIN (dB)
18 17 16 15 TC = +5C TC = -40C
18 17 16
VCC = 4.75V
-50
-60 ATTEN A, 31dB -70 ATTEN B, 31dB 700 800 900 1000 1100 RF FREQUENCY (MHz) 1200
VCC = 5.25V VCC = 5.0V
15 14
-80
14 800 850 900 950 RF FREQUENCY (MHz) 1000
800
850 900 950 RF FREQUENCY (MHz)
1000
MIXER CONV LOSS vs. RF FREQUENCY
MAX2058 toc22
MIXER OUTPUT IP3 vs. RF FREQUENCY
TC = +5C 12
OUTPUT IP3 (dBm)
MIXER OUTPUT IP3 vs. RF FREQUENCY
MAX2058 toc23
TC = -40C
VCC = 5.25V 12
OUTPUT IP3 (dBm)
19
CONVERSION LOSS (dB)
PLO = -3dBm 18 PLO = -6dBm 17 16 PLO = 0dBm 15 14 800 850 900 950 RF FREQUENCY (MHz) 1000 8 7 800 850 900 950 RF FREQUENCY (MHz) 1000 TC = +85C 8 7 800 850 900 950 RF FREQUENCY (MHz) 1000 11 10 9 TC = +25C 11 10 VCC = 4.75V 9 VCC = 5.0V
MIXER OUTPUT IP3 vs. RF FREQUENCY
PLO = -3dBm, 0dBm 12
OUTPUT IP3 (dBm)
MAX2058 toc25
MIXER OUTPUT RETURN LOSS vs. RF FREQUENCY (MIXER ENABLED)
MAX2058 toc26
MIXER OUTPUT RETURN LOSS vs. RF FREQUENCY (MIXER ENABLED)
MAX2058 toc27
13
0
0
MIXER OUT RETURN LOSS (dB)
10 TC = +5C 20 TC = -40C
MIXER OUT RETURN LOSS (dB)
10
11 10 PLO = -6dBm 9 8 7 800 850 900 950 RF FREQUENCY (MHz) 1000 PLO = 0dBm
20
30
TC = +85C TC = +25C
30 VCC = 4.75V, 5.0V, 5.25V 40
40 700 800 900 1000 1100 RF FREQUENCY (MHz) 1200
700
800
900 1000 1100 RF FREQUENCY (MHz)
1200
_______________________________________________________________________________________
MAX2058 toc24
20
13
13
7
700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer
MAX2058
Typical Operating Characteristics (continued)
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz fRF 1200MHz, 40MHz fLO 100MHz, TC = -40C to +85C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT = fRF - fLO, and TC = +25C, unless otherwise noted.)
MIXER OUTPUT RETURN LOSS vs. RF FREQUENCY (MIXER DISABLED)
MAX2058 toc28
MIXER OUTPUT RETURN LOSS vs. RF FREQUENCY (MIXER DISABLED)
MAX2058 toc29
LO RETURN LOSS vs. LO FREQUENCY (MIXER ENABLED)
MAX2058 toc30
0
0
0
MIXER OUT RETURN LOSS (dB)
MIXER OUT RETURN LOSS (dB)
VCC = 4.75V, 5.0V, 5.25V 20
TC = +5C 20
TC = -40C
LO RETURN LOSS (dB)
10
10
10
20 TC = +25C 30
TC = +85C
30 TC = +85C 40 700 800 900 1000 1100 RF FREQUENCY (MHz) 1200 TC = +25C
30
TC = -40C TC = +5C
40 700 800 900 1000 1100 RF FREQUENCY (MHz) 1200
40 0 50 100 150 LO FREQUENCY (MHz) 200
LO RETURN LOSS vs. LO FREQUENCY (MIXER ENABLED)
MAX2058 toc31
ATTEN A ONLY GAIN vs. RF FREQUENCY
MAX2058 toc32
ATTEN A ONLY GAIN vs. RF FREQUENCY (NMT 450MHz BAND)
MAX2058 toc33
0
0
0
LO RETURN LOSS (dB)
10
GAIN (dB)
-10
-10
GAIN (dB)
20 VCC = 4.75V, 5.0V, 5.25V 30
-20
-20
-30
-30
40 0 50 100 150 200 LO FREQUENCY (MHz)
-40 700 800 900 1000 1100 1200 RF FREQUENCY (MHz)
-40 300 350 400 450 500 550 RF FREQUENCY (MHz)
ATTEN A ONLY ABS ACCURACY vs. RF FREQUENCY
MAX2058 toc34
1.5 1.0
1.5 1.0
MAX2058 toc35
0.5
ERROR (dB)
ERROR (dB)
ERROR (dB)
0.5 0 -0.5 -1.0 -1.5 -2.0 700 800 900 1000 1100 1200 RF FREQUENCY (MHz)
0.5 0 -0.5 -1.0 -1.5 -2.0 300 350 400 450 500 550 RF FREQUENCY (MHz)
0
-0.5
-1.0 700 800 900 1000 1100 1200 RF FREQUENCY (MHz)
8
_______________________________________________________________________________________
MAX2058 toc36
2.0
ATTEN A ONLY ABS ACCURACY vs. RF FREQUENCY (NMT 450MHz BAND)
2.0
ATTEN A ONLY REL ACCURACY vs. RF FREQUENCY
1.0
700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer
Typical Operating Characteristics (continued)
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz fRF 1200MHz, 40MHz fLO 100MHz, TC = -40C to +85C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT = fRF - fLO, and TC = +25C, unless otherwise noted.)
ATTEN A ONLY REL ACCURACY vs. RF FREQUENCY (NMT 450MHz BAND)
MAX2058 toc37
MAX2058
MAX2058 toc38
0.5
ERROR (dB)
-10
-10
GAIN (dB)
GAIN (dB)
0
-20
-20
-0.5
-30
-30
-1.0 300 350 400 450 500 550 RF FREQUENCY (MHz)
-40 700 800 900 1000 1100 1200 RF FREQUENCY (MHz)
-40 300 350 400 450 500 550 RF FREQUENCY (MHz)
ATTEN B ONLY ABS ACCURACY vs. RF FREQUENCY
MAX2058 toc40
ATTEN B ONLY ABS ACCURACY vs. RF FREQUENCY (NMT 450MHz BAND)
1.5 1.0
ERROR (dB)
MAX2058 toc41
2.0 1.5 1.0
2.0
ERROR (dB)
0.5 0 -0.5 -1.0 -1.5 -2.0 700 800 900 1000 1100 1200 RF FREQUENCY (MHz)
0.5 0 -0.5 -1.0 -1.5 -2.0 300 350 400 450 500 550 RF FREQUENCY (MHz)
_______________________________________________________________________________________
MAX2058 toc39
1.0
0
ATTEN B ONLY GAIN vs. RF FREQUENCY
0
ATTEN B ONLY GAIN vs. RF FREQUENCY (NMT 450MHz BAND)
9
700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer
MAX2058
Typical Operating Characteristics (continued)
(MAX2058 Typical Application Circuit, VCC = +4.75V to +5.25V, digital attenuators set for maximum gain, 700MHz fRF 1200MHz, 40MHz fLO 100MHz, TC = -40C to +85C. Typical values are at VCC = 5.0V, PIN = 0dBm, fRF = 940MHz, fLO = 45MHz, fLBOUT = fRF - fLO, and TC = +25C, unless otherwise noted.)
ATTEN B ONLY REL ACCURACY vs. RF FREQUENCY
MAX2058 toc42
ATTEN B ONLY REL ACCURACY vs. RF FREQUENCY (NMT 450MHz BAND)
MAX2058 toc43
1.0
1.0
0.5
0.5
ERROR (dB)
ERROR (dB)
0
0
-0.5
-0.5
-1.0 700 800 900 1000 1100 1200 RF FREQUENCY (MHz)
-1.0 300 350 400 450 500 550 RF FREQUENCY (MHz)
SUPPLY CURRENT vs. SUPPLY VOLTAGE (MIXER DISABLED)
MAX2058 toc44
SUPPLY CURRENT vs. SUPPLY VOLTAGE (MIXER ENABLED)
MAX2058 toc45
150 TC = +85C
180
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
140
170
TC = +85C
TC = +25C
160
130
150 TC = +5C 140 TC = -40C
120
TC = +25C
TC = +5C
TC = -40C
110 4.750
4.875
5.000 VCC (V)
5.125
5.250
130 4.750
4.875
5.000 VCC (V)
5.125
5.250
10
______________________________________________________________________________________
700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer
Pin Description
PIN 1 2 3 4 5 6 7 8 9 10, 11, 13, 14, 16, 17, 19, 22, 24, 25, 26, 30, 32, 34, 35, 37, 38 12 15 18 20 21 23 27 28 29 31 33 36 39 40 EP NAME LO+ LOVCCLB LBOUT LB_EN DATA CLK CS VCCLOGIC FUNCTION Loopback Mixer Local Oscillator Positive Input Loopback Mixer Local Oscillator Negative Input Loopback Mixer Supply Voltage. +5V supply for the internal loopback mixer. Bypass to GND with 100pF and 0.1F capacitors as close as possible to the pin. Loopback Mixer RF Output. Internally matched to 50. AC-couple with a capacitor. Loopback Mixer Logic Input. Set to logic-low 0 to enable the mixer. Set to logic-high 1 to disable the mixer. SPI Digital Data Input SPI Clock Input SPI Chip-Select Input Logic Supply Voltage. +5V supply for the internal logic circuitry. Bypass to GND with 100pF and 0.1F capacitors as close as possible to the pin.
MAX2058
GND
Ground
ATTEN_OUTB Attenuator B Output. Internally matched to 50. VCC ATTEN_INB RSET2 VCCBIAS2 AMPOUT VCCAMP AMPIN VCCBIAS1 RSET1 Attenuator B Supply. +5V supply for attenuator B. Bypass to GND with 100pF and 0.01F capacitors as close as possible to the pin. Attenuator B Input. Internally matched to 50. Output Amplifier Bias-Current-Setting Resistor. Sets the bias current for the output amplifier stage. Connect a 3.92k resistor to ground. Bias Circuit Supply Voltage. +5V supply for the internal bias circuitry. Bypass to GND with 1000pF and 0.1F capacitors as close as possible to the pin. RF Amplifier Output. Internally matched to 50. RF Amplifier Supply Voltage. +5V supply for the RF amplifier. Bypass to GND with 1000pF and 0.1F capacitors as close as possible to the pin. RF Amplifier Input. Internally matched to 50. Bias Circuit Supply Voltage. +5V supply for the internal bias circuitry. Bypass to GND with 1000pF and 0.1F capacitors as close as possible to the pin. Input Amplifier Bias-Current-Setting Resistor. Sets the bias current for the input amplifier stage. Connect a 1.2k resistor to ground.
ATTEN_OUTA Attenuator A Output. Internally matched to 50. VCC ATTEN_INA LBBIAS GND Attenuator A Supply Voltage. +5V supply for attenuator A. Bypass to GND with 100pF and 0.01F capacitors as close as possible to the pin. Attenuator A Input. Internally matched to 50. Loopback Mixer Bias-Current-Setting Resistor. Sets the bias current for the mixer. Connect a 2k resistor to ground. Exposed Ground Paddle. Solder the exposed paddle to GND using multiple vias.
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11
700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer
MAX2058
Detailed Description
The MAX2058 high-linearity DVGA consists of two 5-bit, 31dB digital attenuators, a fixed-gain two-stage driver amplifier, a loopback mixer, and a serial interface to control the attenuators. This high level of component integration makes the MAX2058 ideal for base-station transmitter applications. The MAX2058 is designed to operate in the 700MHz to 1200MHz frequency ranges. The overall cascaded performance of the MAX2058 produces a typical 10.5dB gain, a +32.3dBm OIP3, a 19dBm OP1dB, and a total 62dB gain-control range.
Driver Amplifier
The MAX2058 includes a two-stage medium power amplifier with a fixed 17.5dB gain. The driver amplifier circuit is optimized for high linearity and medium output power capability for the 800MHz to 1000MHz frequency range. The driver amplifier is intended to amplify a modulated signal and drive a high-power amplifier in base-station transmitters. In a typical application, the driver amplifier is cascaded in between the two digital attenuators. See the Typical Application Circuit. The two-stage amplifier stage can be disabled for applications where only the digital attenuators and/or loopback mixer are used. To disable the two-stage amplifier, ground or leave unconnected the amplifier supplies VCCBIAS2, VCCAMP, VCCBIAS1, and also the inputs for setting the amplifier bias currents RSET1, RSET2. This reduces the supply current by approximately 132mA under typical conditions.
5-Bit Attenuators
The MAX2058 integrates two 5-bit digital attenuators to achieve a high dynamic range. Each attenuator has a 31dB control range, a 1dB step size, and is programmed with the 3-wire SPI. See the Applications Information section and Table 1 for attenuator programming details. The attenuators can be used for both static and dynamic power control.
Loopback Mixer
The MAX2058 loopback mixer uses a double-balanced active architecture designed to operate with a 700MHz to 1200MHz RF frequency range, and a 40MHz to 100MHz LO frequency range. The RF port of the mixer is connected internally (with an on-chip switch) to the input of the first attenuator stage. The mixer's IF port is matched for a single-ended 50 impedance, while the LO port requires a differential input impedance of 100. The loopback mixer facilitates a self-diagnostic mode for cellular transceivers, whereby the Tx band signal at the input of the mixer can be translated up or down to the corresponding Rx band. This translated signal can then be fed back to the radio's receiver for complete Tx/Rx loop diagnostics. The loopback mixer is enabled and disabled with LB_EN. Set LB_EN to a logic-low 0 to enable the mixer, set LB_EN to a logic-high 1 to disable the mixer.
Table 1. Attenuator Programming
ATTENUATOR A (5 MSBs) Bit 9 = 16dB step Bit 8 = 8dB step Bit 7 = 4dB step Bit 6 = 2dB step Bit 5 = 1dB step ATTENUATOR B (5 LSBs) Bit 4 = 16dB step Bit 3 = 8dB step Bit 2 = 4dB step Bit 1 = 2dB step Bit 0 = 1dB step
DATA MSB
BIT 9
BIT 8
BIT 1
BIT 0
LSB
Applications Information
CLOCK tCS CS tEWN tES tEW NOTES: DATA ENTERED ON CLOCK RISING EDGE. ATTENUATOR STATE CHANGE ON CS RISING EDGE. tCH tCW
SPI Interface and Attenuator Settings
The two 5-bit attenuators are programmed with the 3wire SPI/MICROWIRE-compatible serial interface using 10-bit words. Bit 9 of the 10-bit data is shifted in first, along with all remaining data bits, on the rising edge of the clock regardless of CS being high or low. Once all the data bits are shifted in, all will be sent to the attenuators on the rising edge of CS, thus changing the attenuation state. For standard SPI operation, pull CS low for the duration of a valid 10-bit data set (tEWN). This CS negative pulse width includes the setup time of the rising clock edge to CS transitioning high (tES). See Figure 1.
Figure 1. SPI Timing Diagram
12
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700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer
The 5 MSBs of the 10-bit word program attenuator A, and the 5 LSBs of the 10-bit word program attenuator B. Each bit sets the attenuators to a corresponding attenuation level. For example, logic-low 0 for bit 5 and bit 0 of attenuator A and B, respectively, sets both attenuators at 1dB. 00000 configures both attenuators for 31dB attenuation and 11111 sets for 0dB attenuation. See Table 1 for programming details. 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 PC board, either directly or through an array of plated via holes.
MAX2058
Table 2. Component List Referring to the Typical Application Circuit
COMPONENT C1, C4, C10, C13, C16 C2, C5, C8, C17 C3, C6, C14, C19 C7, C18 C9, C12, C15 C11 R1 R2 R3 R4 T1 U1 VALUE 0.1F 100pF 47pF 0.01F 1000pF 3.9pF 1.2k 3.92k 2.0k 110 2:1 -- DESCRIPTION Microwave capacitors (0603) Microwave capacitors (0402) Microwave capacitors (0402) Microwave capacitors (0402) Microwave capacitors (0402) Microwave capacitor (0402) 1% resistor (0402) 1% resistor (0402) 1% resistor (0402) 1% resistor (0402) RF transformer (100:50) Mini-Circuits TC2-1T MAX2058 MAXIM IC
External Bias
Bias currents for the two-stage amplifier and the loopback mixer are set and optimized with external resistors. Resistor R1 (pin 31) sets the bias current for the input amplifier, R2 (pin 20) sets the bias current for the output amplifier, and R3 (pin 40) sets the bias for the loopback mixer. The external biasing resistor values can be increased for reduced current operation at the expense of performance. Contact the factory for details.
Board Layout
The pin configuration of the MAX2058 has been optimized to facilitate a very compact physical layout of the device and its associated discrete components. The exposed paddle (EP) of the MAX2058's thin QFNEP package provides a low thermal-resistance path to the die. It is important that the PC board on which the MAX2058 is mounted be designed to conduct heat
MAX5873 DUAL DAC I 12
MAX4395 QUAD AMP
MAX2021/MAX2022/MAX2023* ZERO-IF MODS/DEMODS
MAX2058/MAX2059* RF DIGITAL VGAs
0 90 Q 12
31dB
17.5dB
31dB RF OUT
SPI LOGIC
MAX9491* VCO + PLL *FUTURE PRODUCTS--CONTACT FACTORY FOR SAMPLES
45, 80, OR 95MHz LO
LOOPBACK Rx SPI OUT OFF CONTROL (FEEDS BACK INTO Rx CHAIN FRONT-END)
Figure 2. Direct Conversion Transmitter for GSM/EDGE Basestations
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13
700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer
MAX2058
Direct-Conversion Base-Station Transmitter
The MAX2058/MAX2059 are designed to interface directly with Maxim's direct-conversion quadrature modulators and high-speed DACs to provide a complete solution for GSM/EDGE base-station transmitter applications. See Figure 2. The MAX2058/MAX2059,
together with the MAX2021/MAX2022/MAX2023* directconversion modulators/demodulators, the MAX5873 dual-channel DAC, and the MAX4395 quad amplifier, form an ideal total transmitter lineup. This overall system is highly efficient and low cost, while maintaining high linearity and low noise performance.
Typical Application Circuit
V CC
RF INPUT R3
LBBIAS
C17 C19
ATTN_INA
C18 R1
RSET1
ATTEN_OUTA
GND
GND
GND
GND
LO INPUT
T1 LO+ LOVCCLB C1 C2 LBOUT LB_EN DATA CLK CS VCCLOGIC C4 C5 GND
40 R4 1 2 3
39
38
37
36
35
34
33
GND
VCC
32
31 30 29 28 GND C15 VCCBIAS1 AMPIN VCCAMP C12 C13 C14
VCC
5-BIT ATTENUATOR A
C16
VCC
MAX2058 4 5 6 7 8 9 10 11
GND
27 DRIVER AMP
VCC
C3 LBOUT
26 GND 25 GND GND
SPI
24 23 5-BIT ATTENUATOR B E.P. 22 21
C11 AMPOUT GND VCCBIAS2 C9 12
ATTEN_OUTB
VCC
VCC C10
13
GND
14
GND
15
VCC
16
GND
17
GND
18
ATTEN_INB
19
GND
20
RSET2
R2
C6 RF OUTPUT
C8
C7
14
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700MHz to 1200MHz High-Linearity, SPI-Controlled DVGA with Integrated Loopback Mixer
Pin Configuration/Functional Block Diagram
ATTEN_OUTA ATTEN_INA
MAX2058
LBBIAS
40 LO+ 1 LO- 2 VCCLB 3
39
38
37
36
35
34
33
32
5-BIT ATTENUATOR A
RSET1
31 30 GND 29 VCCBIAS1 28 AMPIN 27 VCCAMP 26 GND 25 GND 24 GND 23 AMPOUT 22 GND 21 VCCBIAS2 20
GND
GND
GND
GND
MAX2058 LBOUT 4 LB_EN 5 DATA 6 CLK 7 CS 8 VCCLOGIC 9 GND 10 11 12 13 14 15 16 17 18 19 5-BIT ATTENUATOR B SPI DRIVER AMP
ATTEN_OUTB
ATTEN_INB
VCC
GND GND
VCC
RSET2
GND
GND
GND
GND
GND
Chip Information
PROCESS: SiGe BiCMOS
Package Information
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15
(c) 2006 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.


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