19-2896; Rev 0; 6/03 MAX7438 Evaluation Kit Features ♦ ±5.0V Power Supplies ♦ Selectable Input 75Ω Termination or DAC Termination ♦ Selectable 75Ω Output Series Termination ♦ Selectable High-Frequency Boost Levels ♦ Surface-Mount Construction ♦ Fully Assembled and Tested Component List DESIGNATION QTY C1, C2 2 2 C3, C4 IN1, OUT1, IN2, OUT2, IN3, OUT3 6 JU1–JU22, JU24, JU26 24 DESCRIPTION 1µF ±20%, 6.3V X5R ceramic capacitors (0603) Taiyo Yuden JMK107BJ105MA 0.1µF ±10%, 16V X7R ceramic capacitors (0603) Taiyo Yuden EMK107BJ104KA TDK C1608X7R1C104KT BNC PC board-mount jack connectors 2-pin headers JU23, JU25, JU27 3 3-pin headers R1, R5, R13, R21 4 10kΩ ±1% resistors (0603) R2, R10, R18 3 75kΩ ±1% resistors (0603) R3, R11, R19 3 5.11kΩ ±1% resistors (0603) R4, R9, R12, R17, R20, R25 6 56.2kΩ ±1% resistors (0603) R6, R14, R22 3 82.5kΩ ±1% resistors (0603) R7, R15, R23 3 33.2kΩ ±1% resistors (0603) R8, R16, R24 3 61.9kΩ ±1% resistors (0603) R26–R29, R31, R33 6 75Ω ±1% resistors (0603) R30, R32, R34 3 200Ω ±1% resistors (0603) R35, R36, R37 3 162Ω ±1% resistors (0603) TB1 1 Three-circuit terminal block U1 1 MAX7438ETP (20-pin thin QFN 5mm x 5mm) None 3 Shunts None 1 MAX7438 PC board Ordering Information PART TEMP RANGE IC PACKAGE MAX7438EVKIT 0°C to +70°C 20 Thin QFN-EP* *EP = Exposed paddle. Note: To evaluate the MAX7439, please order a MAX7439ETP free sample with the MAX7438EVKIT. Quick Start Recommended Equipment • ±5.0V dual DC power supplies • Video signal generator (e.g., Tektronix TG 2000) • Video measurement equipment (e.g., Tektronix VM 700A) The MAX7438 EV kit is a fully assembled and tested surface-mount board. Follow the steps below to verify board operation. Do not turn on the power supply until all connections are completed: Evaluating Channel 1 1) Verify that there are shunts across jumpers JU6, JU22, JU24, and JU26. 2) Verify that a shunt is installed across pins 1 and 2 on jumpers JU23, JU25, and JU27. 3) Verify that the rest of the jumpers are open. 4) Connect the output of the video signal generator to the IN1 BNC connector on the EV kit. 5) Connect the OUT1 BNC connector on the EV kit to the input of the video measurement equipment. ________________________________________________________________ Maxim Integrated Products 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. 1 Evaluates: MAX7438/MAX7439 General Description The MAX7438 evaluation kit (EV kit) is a fully assembled and tested surface mount board. The MAX7438 EV kit includes the MAX7438, a three-channel standard-definition video reconstruction filter with a back-porch clamp that sets the output blanking level of the video signal to ground. The MAX7438 has an internal gain of +2V/V, and the EV kit provides five levels of high-frequency boost. The EV kit operates from ±5V dual supplies. The MAX7438 EV kit can also be used to evaluate the MAX7439, which is a three-channel, standard-definition video reconstruction filter with an internal gain of +3V/V. Evaluates: MAX7438/MAX7439 MAX7438 Evaluation Kit 6) Connect both power-supply grounds to the threecircuit terminal block labeled GND. 7) Connect one +5.0V supply to the three-circuit terminal block labeled VCC. Connect the -5.0V supply to the three-terminal block labeled VSS. 8) Set the video signal generator for the desired video input signal, such as multiburst sweep. This signal must contain sync information (i.e., composite or Y). 9) Turn on all power supplies, and enable the signal generator. 10) Analyze the output signal with the VM700 video measurement equipment. output, the 200Ω termination resistor is provided on the board and is selected by changing jumpers JU23, JU25, and JU27 for channels 1, 2, and 3, respectively. A typical DAC termination resistor is 200Ω. The external resistors R2–R25 form a voltage-divider between VCC and GND, and are used to program the level of high-frequency boost for each channel by setting different voltage levels at HFB_ pins. The MAX7438 EV kit incorporates jumpers to provide five different boost options for each individual channel. Refer to the HighFrequency Boost section in the MAX7438/MAX7439 data sheet. The resistor values used in the EV kit are for demonstration purposes only. Use the resistor values in Table 1 in the MAX7438/MAX7439 data sheet for actual designs. These lower value resistors have less coupling to noise. Table 2 lists the JU1–JU18 functions. Detailed Description Jumper Selection The MAX7438 EV kit provides options for evaluating with a video signal generator output or a current-output video DAC/encoder. Table 1 lists the jumper settings for selecting the input from either a video generator or a DAC. When interfacing to a video DAC or encoder Evaluating the MAX7439 The MAX7438 EV kit can be also used to evaluate the MAX7439. To evaluate the MAX7439, replace the MAX7438ETP with a MAX7439ETP. Table 1. Jumpers JU23, JU25, and JU27 Functions JU23 SHUNT LOCATION JU25 SHUNT LOCATION JU27 SHUNT LOCATION INPUT TERMINATION Pins 1 and 2 Pins 1 and 2 Pins 1 and 2 75Ω Pins 2 and 3 Pins 2 and 3 Pins 2 and 3 200Ω All other combinations Undefined Note: To emulate a 200Ω DAC source resistor when driving from a 75Ω generator, remove jumpers JU22, JU24, and JU26. The 162Ω resistor added to a standard 75Ω termination equals approximately 200Ω. Table 2. Jumpers JU1–JU18 Functions NOMINAL BOOST LEVEL (dB) MAX7438 JUMPER IS CLOSED MAX7439 CHANNEL 1 CHANNEL 2 CHANNEL 3 0 0 JU2 JU8 JU14 0.5 0.75 JU3 JU9 JU15 1.0 1.50 JU4 JU10 JU16 1.5 2.25 JU5 JU11 JU17 2.0 3.00 JU1 JU7 JU13 Bypass Bypass JU6 JU12 JU18 Note: Make sure only one shunt is installed at a time for each channel. Component Suppliers PHONE FAX Taiyo Yuden SUPPLER 800-348-2496 847-925-0899 www.t-yuden.com WEBSITE TDK 847-803-6100 847-390-4405 www.component.tdk.com Note: Please indicate that you are using the MAX7438/MAX7439 when contacting these suppliers. 2 _______________________________________________________________________________________ _______________________________________________________________________________________ R9 56.2kΩ R8 61.9kΩ IN1 JU5 2 VCC R29 75Ω 1 JU23 JU10 JU9 R11 5.11kΩ JU12 R13 10kΩ R15 33.2kΩ JU8 JU7 OUT1 N.C. IN1 R17 56.2kΩ 5 4 2 HFB1 VCC 6 R10 75kΩ JU19 R26 75Ω JU22 R35 162Ω 3 VCC R12 56.2kΩ 2 1 R30 200Ω JU3 JU6 JU2 R3 5.11kΩ R2 75kΩ TB1 R14 82.5kΩ JU11 OUT1 1 2 3 JU4 R5 10kΩ R4 56.2kΩ HFB1 R16 61.9kΩ R7 33.2kΩ R6 82.5kΩ JU1 GND VSS HFB2 17 HFB2 C2 1µF 6.3V 20 VSS U1 IN2 IN2 1 2 1 3 2 7 N.C. R31 75Ω JU25 R32 200Ω JU24 MAX7438 R36 162Ω 1 10 R1 10kΩ 15 19 HFB3 8 OUT2 JU20 R27 75Ω OUT3 N.C. IN3 HFB3 VSS RTRIM N.C. N.C. N.C. N.C. 9 18 C4 0.1µF GRD 11 C3 0.1µF C1 1µF 6.3V TERMINAL BLOCK TB1-1 TB1-2 TB1-3 VCC 12 13 16 14 2 OUT2 1 2 JU16 JU15 R21 10kΩ OUT3 1 R34 200Ω R20 56.2kΩ JU27 1 2 3 R33 75Ω R23 33.2kΩ R22 82.5kΩ 2 R18 75kΩ IN3 JU14 R19 5.11kΩ NOTE: 1. ALL RESISTORS ARE 1% 2. U1 EXPOSED PADDLE IS CONNECTED TO VSS 1 JU21 R28 75Ω JU26 R37 162Ω JU18 JU17 R25 56.2kΩ R24 61.9kΩ JU13 VCC Evaluates: MAX7438/MAX7439 VCC MAX7438 Evaluation Kit Figure 1. MAX7438 EV Kit Schematic 3 Evaluates: MAX7438/MAX7439 MAX7438 Evaluation Kit Figure 2. MAX7438 EV Kit Component Placement Guide—Top Silkscreen 4 _______________________________________________________________________________________ MAX7438 Evaluation Kit Evaluates: MAX7438/MAX7439 Figure 3. MAX7438 EV Kit PC Board Layout—Component Side _______________________________________________________________________________________ 5 Evaluates: MAX7438/MAX7439 MAX7438 Evaluation Kit Figure 4. MAX7438 EV Kit PC Board Layout—Solder Side 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. 6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.