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19-3445; Rev 0; 10/04
KIT ATION EVALU BLE AVAILA
Broadband Variable-Gain Amplifiers
General Description Features
Low-Noise VGA Eliminates PIN Attenuator 22dB Gain-Control Range Low Noise Figure: 5dB at Maximum Gain Setting High Linearity: +19dBm IIP3 (MAX3538) at Maximum Gain Setting Low Power Consumption: <200mW (MAX3537) Available in a 4mm x 4mm, 12-Pin Thin QFN Package
MAX3537/MAX3538
The MAX3537/MAX3538 broadband RF variable-gain amplifiers (VGA) are designed for digital and OpenCableTM set-tops and televisions. These devices feature a unique design that integrates a dual-band (UHF and VHF) input and a low-noise, variable-gain amplifier. The integrated RF VGA covers a 10MHz to 1GHz input frequency range and provides 22dB of gain-control range. The MAX3538 is intended for the most difficult signal conditions where performance is critical. The external pullup inductor improves IIP2 and IIP3 while also increasing gain for better sensitivity. The MAX3537 does not need an external pullup inductor and is ideal for low-power applications with less demanding receiver distortion requirements such as smaller TVs using indoor antennas. The MAX3537/MAX3538 are specified for operation in the 0C to +85C temperature range and are available in 4mm x 4mm, 12-pin thin QFN packages with exposed paddle (EP).
Applications
OpenCable Set-Top Boxes and Televisions Digital Set-Top Boxes Media Gateways Digital Terrestrial Receivers TV IF Strips
PART MAX3537UTC MAX3538UTC
Ordering Information
TEMP RANGE 0C to +85C 0C to +85C PIN-PACKAGE 12 Thin QFN-EP* 12 Thin QFN-EP* PKG CODE T1244-3 T1244-3
*EP = Exposed paddle.
Pin Configuration/ Functional Diagram
OpenCable is a trademark of Cable Television Laboratories, Inc.
RF_GND2 11 VHF_IN GND 10
12
UHF_IN RF_GND1 UHF_SHUNT
1 2 3
9 8 7
LNAOUT VCC RFAGC
MAX3537/3538
4 RBIAS
5 SEL_UHF
6 SHDN
________________________________________________________________ Maxim Integrated Products
1
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Broadband Variable-Gain Amplifiers MAX3537/MAX3538
ABSOLUTE MAXIMUM RATINGS
VCC to GND ...........................................................-0.3V to +5.5V RFAGC, UHF_IN, SEL_UHF, VHF_IN, SHDN, RBIAS, RF_GND1, RF_GND2, UHF_SHUNT to GND....................................................-0.3V to (VCC + 0.3V) LNAOUT Short-Circuit Duration..............................................10s UHFIN, VHFIN Maximum RF Input Power.........................14dBm Continuous Power Dissipation (TA = +70C) 12-Pin Thin QFN (derate 16.9mW/C above +70C)............................................................1349mW Operating Temperature Range...............................0C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
CAUTION! ESD SENSITIVE DEVICE 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
(MAX3537/MAX3538 EV kit, VCC = 4.75V to 5.25V, no RF signal applied, TA = 0C to +85C, unless otherwise noted. Typical values are at VCC = 5V, RBIAS = 11.8k (MAX3537) or 9.1k (MAX3538), TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER Supply Voltage Supply Current RFAGC Input Bias Current RFAGC Control Voltage (Note 2) Input Logic-Level Low Input Logic-Level High 0.7 x VCC Operational mode MAX3537 MAX3538 -50 3 1 0.3 x VCC CONDITIONS MIN 4.75 38 48 2 TYP MAX 5.25 45.8 58 100 +50 UNITS V mA A A V V V
Standby mode (VENABLE = VSEL_UHF = 0.1V) VRFAGC = 1V and 3V Maximum gain Minimum gain
AC ELECTRICAL CHARACTERISTICS (MAX3537)
(MAX3537 EV kit, VCC = 4.75V to 5.25V, TA = 0C to +85C, unless otherwise noted. Typical values are at VCC = 5V, RBIAS = 11.8k, TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER Operating Frequency Range Input Return Loss Input Power Range Per Channel Voltage Gain Linear Gain-Control Range Gain Flatness Noise Figure Input 2nd-Order Intercept Point Maximum gain Measured at 50MHz, difference between maximum and minimum gain From 50MHz to 878MHz, VRFAGC = 3V (Note 2) Maximum gain, diplexer loss included Maximum gain, VRFAGC = 3V (Notes 2, 3) Minimum gain, VRFAGC = 1V 21.6 42.5 5 26 48 Diplex filter included, worst case across band, any gain setting (Note 2) CONDITIONS MIN 50 4.3 -35 7.7 19.2 9.6 23.1 2.8 8.5 +50 12.7 TYP MAX 878 UNITS MHz dB dBmV dB dB dB dB dBm
2
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Broadband Variable-Gain Amplifiers
AC ELECTRICAL CHARACTERISTICS (MAX3537) (continued)
(MAX3537 EV kit, VCC = 4.75V to 5.25V, TA = 0C to +85C, unless otherwise noted. Typical values are at VCC = 5V, RBIAS = 11.8k, TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER Input 3rd-Order Intercept Point 1dB Compression Point Isolation Output Return Loss CONDITIONS Maximum gain, VRFAGC = 3V (Note 4) Minimum gain, VRFAGC = 1V (Note 2) Maximum gain (Note 2) Shutdown mode, 50MHz to 878MHz, RF input to RF output Port to port Unbalanced 75 load MIN 12.7 28.2 0 TYP 17 33 1.9 37 23 10 dB MAX UNITS dBm dBm dBc
MAX3537/MAX3538
AC ELECTRICAL CHARACTERISTICS (MAX3538)
(MAX3538 EV kit, VCC = 4.75V to 5.25V, TA = 0C to +85C, unless otherwise noted. Typical values are at VCC = 5V, RBIAS = 9.1k, TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER Operating Frequency Range Input Return Loss Input Power Range Per Channel Voltage Gain Linear Gain-Control Range Gain Flatness Noise Figure Input 2nd-Order Intercept Point Input 3rd-Order Intercept Point 1dB Compression Point Isolation Output Return Loss Maximum gain Measured at 50MHz, difference between maximum and minimum gain From 50MHz to 878MHz, VRFAGC = 3V (Note 2) Maximum gain, diplexer loss included Maximum gain, VRFAGC = 3V (Notes 2, 3) Minimum gain, VRFAGC = 1V Maximum gain, VRFAGC = 3V (Note 4) Minimum gain, VRFAGC = 1V (Note 2) Maximum gain. (Note 2) Shutdown mode, 50MHz to 878MHz, RF input to RF output Port to port Unbalanced 75 load 27 47.6 15.4 30 2.2 5 34 53 19 33 4 41 24 10 dB Diplex filter included, worst case across band, any gain setting (Note 2) CONDITIONS MIN 50 5.4 -35 9.7 19 12.4 23 2.9 8.5 +50 15.7 TYP MAX 878 UNITS MHz dB dBmV dB dB dB dB dBm dBm dBm dBc
Note 1: Note 2: Note 3: Note 4:
Guaranteed by production test at TA = +25C and +85C and does not include diplex filter loss, unless otherwise noted. Guaranteed by design and characterization from TA = 0C to +85C. Tested with input tones at 210MHz and 660MHz at -12dBm/tone. Diplexer is not included. Tested with input tones at 760MHz and 810MHz at -12dBm/tone. Diplexer is not included.
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Broadband Variable-Gain Amplifiers MAX3537/MAX3538
Typical Operating Characteristics
(MAX3537 EV kit with diplex filter removed, VCC = 5V, VRFAGC = 3V, TA = +25C, unless otherwise noted.)
MAX3537
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX3537 toc01
GAIN vs. FREQUENCY
MAX3537 toc02
GAIN vs. GAIN-CONTROL VOLTAGE
MAX3537 toc03
46 44 SUPPLY CURRENT (mA) 42 40 38 36 34 32 30 4.7 4.8 4.9 5.0 5.1 5.2 TA = 0C TA = +25C
20 18 16 14 GAIN (dB) 12 10 8 6 4 2 0 TA = +85C TA = +25C TA = 0C
15 10 fRF = 878MHz 5 GAIN (dB) 0 -5 -10 -15
TA = +85C
fRF = 50MHz
5.3
SUPPLY VOLTAGE (V)
10 120 230 340 450 560 670 780 890 1000 FREQUENCY (MHz)
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 VRFAGC (V)
NOISE FIGURE vs. FREQUENCY
MAX3537 toc04
NOISE FIGURE vs. GAIN
MAX3537 toc05
IIP2 vs. GAIN-CONTROL VOLTAGE
65 60 55 IIP2 (dBm) 50 45 40 35 30 f1 = 400MHz f2 = 450MHz 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 VRFAGC (V)
MAX3537 toc06
12 11 10 NOISE FIGURE (dB) 9 8 7 6 5 4 3 2 TA = 0C TA = +85C TA = +25C
35 30 NOISE FIGURE (dB) 25 20 15 10 5 0 fRF = 50MHz
70
fRF = 878MHz -15 -10 -5 0 5 10
25 20
10 120 230 340 450 560 670 780 890 1000 FREQUENCY (MHz)
GAIN (dB)
IIP3 vs. VRFAGC
MAX3537 toc07
INPUT RETURN LOSS vs. FREQUENCY
WITH DIPLEXER 5.00 INPUT RETURN LOSS (dB) B 10.00 15.00 20.00 25.00 30.00 50 170 290 410 530 650 770 890 FREQUENCY (MHz) A: TA = +85C, UHF_IN ENABLED D: TA = +85C, VHF_IN ENABLED B: TA = +25C, UHF_IN ENABLED E: TA = +25C, VHF_IN ENABLED C: TA = 0C, UHF_IN ENABLED F: TA = 0C, VHF_IN ENABLED D E F C A
MAX3537 toc08
OUTPUT RETURN LOSS vs. FREQUENCY
2.00 OUTPUT RETURN LOSS (dB) 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00 50 170 290 410 530 650 770 890 FREQUENCY (MHz) A: TA = +85C, UHF_IN ENABLED D: TA = +85C, VHF_IN ENABLED B: TA = +25C, UHF_IN ENABLED E: TA = +25C, VHF_IN ENABLED C: TA = 0C, UHF_IN ENABLED F: TA = 0C, VHF_IN ENABLED F E D WITH DIPLEXER A B C
MAX3537 toc09
50 45 40 IIP3 (dBm) 35 30 25 20 15 10 f1 = 400MHz f2 = 450MHz
0
0
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 VRFAGC (V)
4
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Broadband Variable-Gain Amplifiers
Typical Operating Characteristics (continued)
(MAX3537 EV kit with diplex filter removed, VCC = 5V, VRFAGC = 3V, TA = +25C, unless otherwise noted.)
MAX3537/MAX3538
MAX3537
SUPPLY CURRENT AND IIP3 vs. RBIAS
MAX3537 toc10
GAIN vs. RBIAS
MAX3537 toc11
43 41 SUPPLY CURRENT (mA) 39 37 35 33 31 29 27 25 11.8 12.6 13.4 RBIAS (k) 14.2 f1 = 400MHz f2 = 450MHz PIN = -12dBm/tone CURRENT IIP3
23 21 19 GAIN (dB) 17 15 13 11 9 7 5 IIP3 (dBm)
14 12
fRF = 400MHz
-25.00 -30.00 -35.00
WITH DIPLEXER
8 6 4 2 0 11.8 12.6 13.4 RBIAS (k) 14.2 15.0
GAIN (dB)
10
-40.00 -45.00 -50.00 -55.00 -60.00 -65.00 -70.00 10 120 230 340 450 560 670 780 890 1000 FREQUENCY (MHz)
15.0
Typical Operating Characteristics
(MAX3538 EV kit with diplex filter removed, VCC = 5V, VRFAGC = 3V, TA = +25C, unless otherwise noted.)
MAX3538
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX3538 toc01
GAIN vs. FREQUENCY
15 14 13 GAIN (dB) GAIN (dB) 12 11 10 9 TA = +85C TA = +25C
MAX3538 toc02
GAIN vs. GAIN-CONTROL VOLTAGE
MAX3538 toc03
56 54 SUPPLY CURRENT (mA) 52 50 48 46 44 42 40 4.7 4.8 4.9 5.0 5.1 5.2 TA = 0C TA = +25C TA = +85C
16
15 10 fRF = 878MHz 5 0 -5 -10 -15 fRF = 50MHz
TA = 0C
8 7 6 5.3 SUPPLY VOLTAGE (V) 10 120 230 340 450 560 670 780 890 1000 FREQUENCY (MHz)
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 VRFAGC (V)
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5
MAX3537 toc12
45
SHUTDOWN ISOLATION vs. FREQUENCY
-20.00
25
16
Broadband Variable-Gain Amplifiers MAX3537/MAX3538
Typical Operating Characteristics (continued)
(MAX3538 EV kit with diplex filter removed, VCC = 5V, VRFAGC = 3V, TA = +25C, unless otherwise noted.)
MAX3538
NOISE FIGURE vs. FREQUENCY
MAX3538 toc04
NOISE FIGURE vs. GAIN
MAX3538 toc05
11 10 NOISE FIGURE (dB) 9 8 7 6 5 4 3 2 TA = +25C TA = 0C TA = +85C
25 NOISE FIGURE (dB) 20 15 10 5 fRF = 878MHz
65 60 IIP2 (dBm)
fRF = 50MHz
55 50 45 40 35 f1 = 400MHz f2 = 450MHz 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 VRFAGC (V)
0 10 120 230 340 450 560 670 780 890 1000 FREQUENCY (MHz) -15 -10 -5 0 GAIN (dB) 5 10 15
30
IIP3 vs. VRFAGC
MAX3538 toc07
INPUT RETURN LOSS vs. FREQUENCY
MAX3538 toc08
OUTPUT RETURN LOSS vs. FREQUENCY
WITH DIPLEXER OUTPUT RETURN LOSS (dB) 5.00 10.00 15.00 20.00 E 25.00 D 30.00 F A, B, C
MAX3538 toc09
50 45 40 IIP2 (dBm) 35 30 25 20 15 10 f1 = 400MHz f2 = 450MHz
0 5.00 INPUT RETURN LOSS (dB) 10.00 15.00
WITH DIPLEXER
0
A, B, C
F 20.00 25.00 30.00 E D
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 VRFAGC (V)
50
170
290
410
530
650
770
890
50
170
290
410
530
650
770
890
FREQUENCY (MHz) FREQUENCY (MHz) A: TA = +85C, UHF_IN ENABLED D: TA = +85C, VHF_IN ENABLED A: TA = +85C, UHF_IN ENABLED D: TA = +85C, VHF_IN ENABLED B: TA = +25C, UHF_IN ENABLED E: TA = +25C, VHF_IN ENABLED B: TA = +25C, UHF_IN ENABLED E: TA = +25C, VHF_IN ENABLED C: TA = 0C, UHF_IN ENABLED F: TA = 0C, VHF_IN ENABLED C: TA = 0C, UHF_IN ENABLED F: TA = 0C, VHF_IN ENABLED
SUPPLY CURRENT AND IIP3 vs. RBIAS
MAX3538 toc10
GAIN vs. RBIAS
MAX3538 toc11
SHUTDOWN ISOLATION vs. FREQUENCY
-25.00 -30.00 -35.00 GAIN (dB) -40.00 -45.00 -50.00 -55.00 WITH DIPLEXER
MAX3538 toc12
50 48 46 SUPPLY CURRENT (mA) 44 42 40 38 36 34 32 30 9.1 10.0 RBIAS (k) 10.9 f1 = 400MHz f2 = 450MHz PIN = -12dBm/tone CURRENT IIP3
25 23 21 19 GAIN (dB) 17 15 13 11 9 7 5 IIP3 (dBm)
18 16 14 12 10 8 6 4 2 9.1 10.0 RBIAS (k) 10.9 fRF = 400MHz
-20.00
-60.00 -65.00 -70.00 11.8 10 120 230 340 450 560 670 780 890 FREQUENCY (MHz)
11.8
6
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MAX3538 toc06
12
IIP2 vs. VRFAGC
70
30
Broadband Variable-Gain Amplifiers
Pin Description
PIN 1 2 3 4 5 6 7 8 9 10 11 12 EP NAME UHF_IN RF_GND1 UHF_SHUNT RBIAS SEL_UHF SHDN RFAGC VCC LNAOUT GND RF_GND2 VHF_IN GND FUNCTION UHF Input. This input is terminated into 75 when not selected. First RF Ground. Connect a 1000pF capacitor from RF_GND1 to GND. Do not connect RF_GND1 to RF_GND2. UHF Shunt. Connects to GND when SEL_UHF is low, high impedance when SEL_UHF is high. Amplifier Bias. Connect an 11.8k 1% (MAX3537) or 9.1k 1% (MAX3538) resistor from RBIAS to GND. Band-Select Input. Selects between the UHF and VHF inputs. Logic low to select VHF, logic high to select UHF. Shutdown. Logic low to put the device in standby mode. Logic high for normal operation. Automatic Gain-Control Input. Accepts a DC voltage from 1V (minimum gain) to 3V (maximum gain). Supply Voltage. Bypass to GND with 47pF and 1000pF capacitors placed as close to the device as possible. RF Output. Requires a DC-blocking capacitor. The MAX3538 requires a 560nH pullup inductor from LNAOUT to VCC. Ground Second RF Ground. Connect a 1000pF capacitor from RF_GND2 to GND. Do not connect RF_GND2 to RF_GND1. VHF Input. This input is terminated into approximately 75 when not selected. Exposed Paddle. Solder evenly to the board's ground plane for proper operation.
MAX3537/MAX3538
Detailed Description
The MAX3537/MAX3538 variable-gain amplifiers are designed for US digital television applications, specifically to meet ATSC's recommended receiver requirements. The MAX3538 uses an external pullup inductor for maximum linearity and gain and is ideal for performance-driven applications. The MAX3537 does not require an external pullup inductor and requires 10mA less current than the MAX3538. This results in slightly lower linearity and gain but is an acceptable option for cost- and/or power-sensitive applications. The two parts are otherwise identical and can use the same layout and application schematic except for the pullup inductor and RBIAS resistor.
Table 1. SEL_UHF Operation
SEL_UHF 0 1 FUNCTION Receive VHF channels (50MHz to 230MHz) or cable channels below approximately 305MHz. Receive UHF channels (470MHz to 810MHz) or cable channels above approximately 305MHz.
Broadband Variable-Gain Amplifier (VGA)
The MAX3537/MAX3538 integrate a broadband lownoise variable-gain amplifier. The MAX3538 VGA has an open-collector output and requires a pullup inductor to VCC, while the MAX3537 has an internal pullup to VCC. Both the MAX3537 and MAX3538 outputs require a DC-blocking capacitor. The MAX3537/MAX3538 provide a 22dB gain-control range for increased system linearity. A DC voltage applied at the RFAGC pin controls the devices' overall gain, and can range from 1V to 3V with 3V providing the maximum gain setting.
Dual-Band Inputs
The MAX3537/MAX3538 feature two RF inputs, one for the VHF band (50MHz to 230MHz) and one for the UHF band (470MHz to 810MHz). An external diplex filter attenuates the undesired band. The diplex filter is easily implemented with discrete components, see the Typical Application Circuit for typical component values. Selection between the two inputs is achieved with a single digital input, SEL_UHF. See Table 1 for a description of SEL_UHF operation. The VHF and UHF inputs are terminated into approximately 75 when not selected.
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7
Broadband Variable-Gain Amplifiers MAX3537/MAX3538
TYPICAL APPLICATION CIRCUIT FREQUENCY RESPONSE
20.00 15.00 10.00 GAIN (dB) 5.00 0 C D NF (dB) A B 9 8 7 6 5 4 3 10 120 230 340 450 560 670 780 890 1000 FREQUENCY (MHz) A: MAX3538, VHF_IN ENABLED C: MAX3538, UHF_IN ENABLED B: MAX3537, VHF_IN ENABLED D: MAX3537, UHF_IN ENABLED 2 10
TYPICAL APPLICATION CIRCUIT NOISE FIGURE (MAX3537)
VHF_IN ENABLED
-5.00 -10.00 -15.00 -20.00
UHF_IN ENABLED
10 120 230 340 450 560 670 780 890 1000 FREQUENCY (MHz)
Figure 1. Frequency Response of the MAX3537/MAX3538 Typical Application Circuit
Figure 2. Noise Figure of MAX3537 Typical Application Circuit
TYPICAL APPLICATION CIRCUIT NOISE FIGURE (MAX3538)
10 9 8 7 NF (dB) 6 5 4 UHF_IN ENABLED 3 2 10 120 230 340 450 560 670 780 890 1000 FREQUENCY (MHz) VHF_IN ENABLED
filter attenuates the undesired channels, improving second-order distortion performance.
Terrestrial + Cable Television Applications
Television receivers having one RF input or multiple inputs that must receive cable and terrestrial channels must cover a 50MHz to 860MHz frequency range. The diplex filter must allow reception within this range while still providing attenuation of the undesired band. The Typical Application Circuit provides acceptable gain and noise figure performance over the diplexer transition band between VHF and UHF, see Figures 1 and 3.
Layout Considerations
The EV kit serves as a guide for PC board layout. Keep RF signal lines as short as possible to minimize losses and radiation. Use controlled impedance on all highfrequency traces. For proper operation, solder the exposed paddle evenly to the ground plane. Use abundant vias beneath the exposed paddle for maximum heat dissipation. Use abundant ground vias between RF traces to minimize undesired coupling. Bypass VCC to ground with 47nF and 1000nF capacitors placed as close to the pin as possible, with the 47nF capacitor closest to the device.
Figure 3. Noise Figure of MAX3538 Typical Application Circuit
Applications Information
Terrestrial Television Applications
Television receivers having dedicated RF inputs for cable and terrestrials reception can optimize the terrestrial path to better meet the difficult requirements recommended by ATSC. For dedicated terrestrial reception, the diplex filter is optimized for reception of VHF and UHF channels (50MHz to 230MHz, and 470MHz to 810MHz). The diplex
8
Chip Information
TRANSISTOR COUNT: 1982 PROCESS: BiCMOS
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Broadband Variable-Gain Amplifiers
Typical Application Circuit
C11 1000pF L4 56nH C10 10pF L3 56nH RF_GND2 C12 4.7pF
MAX3537/MAX3538
C8 1000pF VHF_IN
GND
12 C1 6.8pF RFIN L1 22nH C2 6.8pF L2 8.2nH
11
10
C7 1000pF
TV TUNER INPUT
UHF_IN RF_GND1
1 2 3
9 8 7
LNAOUT VCC VCC RFAGC C5 47pF
L2*
C3 1000pF
MAX3537/3538
UHF_SHUNT
C6 1000pF
R2 20k VRFAGC 4 RBIAS 5 SEL_UHF 6 SHDN C4 100nF ENABLE SEL_UHF
* R1 L2
MAX3537 MAX3538 11.8k OPEN 9.1k 560nH
R1*
Figure 4. Typical Application Circuit
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9
Broadband Variable-Gain Amplifiers MAX3537/MAX3538
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.) 24L QFN THIN.EPS
PACKAGE OUTLINE 12, 16, 20, 24L THIN QFN, 4x4x0.8mm
21-0139
C
1
2
10
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Broadband Variable-Gain Amplifiers
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.)
MAX3537/MAX3538
PACKAGE OUTLINE 12, 16, 20, 24L THIN QFN, 4x4x0.8mm
21-0139
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 (c) 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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