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19-1915; Rev 0; 1/01
MAX2130 Evaluation Kit
General Description
The MAX2130 evaluation kit (EV kit) simplifies evaluation of the MAX2130 broadband, high-dynamic range, two-output amplifier for digital TV tuner applications. The EV kit is fully assembled and tested, allowing simple evaluation of all device functions. All signal ports utilize SMA connectors and 50-to-75 impedance transformation networks, providing a convenient interface to 50 RF test equipment. o Easy Evaluation of MAX2130 o All Critical Peripheral Components Included o SMA Input and Output Signal Connectors o 50-to-75 Impedance Transformation Networks o Fully Assembled and Tested
Features
Evaluates: MAX2130
Component List
DESIGNATION C1 C2, C3 C4-C7 C9 C10 L1 R1, R5, R7 R2, R4, R6 R3 QTY 1 2 4 1 0 1 3 3 1 DESCRIPTION 1000pF ceramic capacitor (0603) 47pF ceramic capacitors (0603) 0.1F ceramic capacitors (0603) 10F, 10V tantalum capacitor, AVX TAJB106M010 Not installed Ferrite bead, Murata BLM11A221SG (0603) 43.2 1% resistors (0603) 86.6 1% resistors (0603) 15k 1% resistor (0603) PART MAX2130EVKIT
Ordering Information
TEMP. RANGE -40C to +85C IC PACKAGE 8 MAX-EP*
*Exposed Paddle
Connections and Setup
1) DC Power Supply: Set the power-supply voltage to +5V. Turn the power supply off and connect it to the VCC and GND connections of the EV kit. If desired, place an ammeter in series with the power supply to measure supply current and a voltmeter in parallel with the VCC and GND connections to measure the supply voltage delivered to the device. 2) RF Signal Source: Set the signal generator to an RF frequency of 500MHz at an output power level of -14.3dBm. Turn the output of the signal generator off. Connect the signal generator to the IN port SMA connector using a 50 SMA cable. Because the IN port of the MAX2130 is internally matched to 75, and the test equipment is a 50 source, an external matching network converts the load seen by the signal generator to 50. The power loss of this impedance-matching network is approximately 5.7dB. The actual power delivered to the IN port of the MAX2130 is -14.3dBm - 5.7dBm = -20dBm. 3) Spectrum Analyzer: Connect the spectrum analyzer to the OUT1 port SMA connector using a 50 SMA cable. Set the center frequency of the spectrum analyzer to 500MHz, the span to 1MHz, and the reference level to 0dBm. Because the MAX2130 is intended to drive a 75 load, a 75-to-50 impedance-matching network is included between OUT1 of the MAX2130 and the OUT1 port of the EV kit. The power loss of this impedance-matching network is approximately 5.7dB. 4) 50 Termination: Terminate the OUT2 port SMA connector with a 50 terminator.
Test Equipment Required
This section lists the test equipment required for evaluating the MAX2130: * * One power supply capable of providing 150mA of supply current at +5V. One HP8648C RF signal generator or equivalent (50) sine-wave source capable of delivering at least +10dBm of output power from 44MHz to 878MHz. One HP8561E RF spectrum analyzer or equivalent high-sensitivity spectrum analyzer. Two 50 SMA cables (RG-58A/U or equivalent). One 50 SMA terminator Optional: digital multimeters (DMMs) to monitor DC supply voltage and supply current.
* * * *
________________________________________________________________ Maxim Integrated Products
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For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
MAX2130 Evaluation Kit Evaluates: MAX2130
Analysis
Turn on the power supply and signal generator. The ammeter, if used, should read approximately 90mA. The gain of the IN-to-OUT1 path of the MAX2130 is typically 15.0dB. Applying -14.3dBm to the IN SMA connector, and taking into account the loss of the 50-to75 matching networks, the spectrum analyzer should show an output power of approximately -10.7dBm at the OUT1 port of the EV kit. POUT = PIN - match loss + gain - match loss POUT = -14.3dBm - 5.7dB + 15.0dB - 5.7dB = -10.7dBm Be sure to take into account cable losses when calculating power gain. To evaluate the IN-to-OUT2 path gain, connect the spectrum analyzer to the OUT2 port SMA connector using a 50 SMA cable and terminate the OUT1 port with the 50 terminator. The gain of the IN-to-OUT2 path of the MAX2130 is typically 8.7dB. Applying -14.3dBm to the IN SMA connector, and taking into account the loss of the 50-to-75 matching networks, the spectrum analyzer should show an output power of approximately -17.0dBm at the OUT2 port of the EV kit. POUT = PIN - match loss + gain - match loss POUT = -14.3dBm - 5.7dB + 8.7dB - 5.7dB = -17.0dBm Once again, be sure to take into account cable losses when calculating power gain. Adjust resistor R3 to trade off between the linearity and supply current. Please refer to the MAX2130 data sheet for more information.
Layout and Bypassing
Good PC board layout is an essential aspect of RF circuit design. The MAX2130 EV board can serve as a guide for layout of your board. Keep PC board trace lengths as short as possible to minimize parasitics and losses. Keep bypass capacitors as close to the device as possible with low-inductance connections to the ground plane.
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MAX2130 Evaluation Kit Evaluates: MAX2130
L1 VCC C9 10F 16V C10 OPEN R1 43.2 1% IN SMA R2 86.6 1% C5 0.1F 2 IN C1 1000pF C2 47pF 1 VCC OUT1 8
C3 47pF
C4 0.1F OUT1 R5 43.2 1% R4 86.6 1% SMA
GND
C6 0.1F
U1 MAX2130
GND 7
3
BIAS
GND
6
R3 15k 4 5 C7 0.1F
R7 43.2 1% R6 86.6 1%
OUT2 SMA
GND
OUT2
*EXPOSED PADDLE IS CONNECTED TO GND.
Figure 1. MAX2130 EV Kit Schematic
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MAX2130 Evaluation Kit Evaluates: MAX2130
1.0"
Figure 2. MAX2130 EV Kit Component Placement Guide-- Component Side
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Figure 3. MAX2130 EV Kit PC Board Layout--Component Side
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Figure 4. MAX2130 EV Kit PC Board Layout--Ground Plane
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.
4 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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