19-2993; Rev 0; 10/03 MAX7445 Evaluation Kit Features ♦ Single +5V Power Supply ♦ Selectable Input 75Ω Termination or DAC Termination ♦ Selectable AC- or DC-Output Couple ♦ Selectable Output Buffer Gains (MAX7445) ♦ Surface-Mount Construction ♦ Fully Assembled and Tested Component List DESIGNATION C1 C2–C6 C7–C10 QTY 1 Ordering Information DESCRIPTION 1µF ±20%, 6.3V X5R ceramic capacitor (0603) Taiyo Yuden JMK107BJ105MA or equivalent 5 0.1µF ±10%, 16V X7R ceramic capacitors (0603) Taiyo Yuden EMK107BJ104KA or TDK C1608X7R1C104KT or equivalent 4 220µF ±20%, 6.3V aluminum electrolytic capacitors (6.3mm x 6.0mm) Sanyo 6CV220AX EXTSYNC 1 50Ω BNC PC board mount-jack connector IPA-IPD, OPA-OPD 8 75Ω BNC PC board mount-jack connectors JU1–JU7 7 3-pin headers JU8–JU16 8 2-pin headers R1–R8 8 75Ω ±1% resistors (0603) R9–R12 4 200Ω ±1% resistors (0603) R13–R16 4 162Ω ±1% resistors (0603) R17 1 0Ω resistor (0603) TB1 1 2-circuit terminal block U1 1 MAX7445EUD (14-pin TSSOP) None 15 Shunts None 1 MAX7445 PC board PART MAX7445EVKIT TEMP RANGE IC PACKAGE 0°C to +70°C 14 TSSOP-EP* *EP = Exposed pad. Note: To evaluate the MAX7446–MAX7449, order a free sample of the MAX7446EUD–MAX7449EUD with the MAX7445EVKIT. Quick Start The following equipment is recommended: • Single +5V 500mA DC power supply • Video signal generator (e.g., Tektronix TG 2000) • Video measurement equipment (e.g., Tektronix VM 700A) The MAX7445 EV kit is a fully assembled and tested surface-mount board. Follow the steps below to verify the 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 JU5 (pins 2 and 3, GAIN = +6.0dB), JU6 (pins 2 and 3, SELECT = GND), and JU7 (pins 2 and 3, output enabled). 2) Verify that a shunt is installed across pins 1 and 2 of jumpers JU1–JU4 (75Ω termination). 3) Verify that there are shunts across jumpers JU8, JU10, JU11, and JU12. 4) Verify that the remaining jumpers are open. 5) Connect the output of the video signal generator to the IPA BNC connector on the EV kit. ________________________________________________________________ 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: MAX7445–MAX7449 General Description The MAX7445 evaluation kit (EV kit) is a fully assembled and tested surface-mount board. The MAX7445 EV kit includes a MAX7445 4-channel video-reconstruction filter, ideal for anti-aliasing and digital-to-analog converter (DAC)-smoothing video applications. The EV kit provides three different output buffer-gain settings. The input signal is AC-coupled, and the output signal can be DC- or ACcoupled. The EV kit operates from a single +5V supply. The MAX7445 EV kit can be used to evaluate the MAX7445–MAX7449. Evaluates: MAX7445–MAX7449 MAX7445 Evaluation Kit Component Suppliers SUPPLER PHONE FAX WEBSITE Sanyo 619-661-6835 619-661-1055 www.sanyo.com Taiyo Yuden 800-348-2496 847-925-0899 www.t-yuden.com TDK 847-803-6100 847-390-4405 www.component.tdk.com Note: Please indicate that you are using the MAX7445–MAX7449 when contacting these suppliers. 6) Connect the OPA BNC connector on the EV kit to the input of the video measurement equipment. 7) Connect the positive of the +5V supply to the 2-circuit terminal block labeled VCC. Connect the negative of the power supply to the 2-circuit terminal block labeled GND. 8) Set the video signal generator for the desired videoinput signal (e.g., multiburst sweep). This signal must contain sync information (composite or CVBS). 9) Turn on the power supply, and enable the signal generator. 10) Analyze the output signal with the video-measurement equipment. Detailed Description Jumper Selection The MAX7445 EV kit provides options for evaluating the MAX7445 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 with a video DAC or an encoder output, the 200Ω termination resistor is on the board and is selected by changing jumpers JU1–JU4 for channels A through D, respectively. A typical DAC termination resistor is 200Ω. The EV kit incorporates jumpers to control GAIN (JU5), SELECT (JU6), and DISABLE (JU7) pins. Tables 2, 3, and 4 list the jumper functions for JU5, JU6, and JU7. Evaluating the MAX7446–MAX7449 The MAX7445 EV kit can be used to evaluate the MAX7446–MAX7449. To evaluate the MAX7446– MAX7449, replace the MAX7445EUD with a MAX7446EUD–MAX7449EUD, and verify that there is a shunt across pins 2 and 3 of JU5 (GAIN = GND). Place a shunt across JU9 and replace R17 with a 49.9Ω resistor when evaluating the MAX7449. Connect the video measurement equipment to OPB, OPC, and OPD to view the output signal. The MAX7449 requires an external TTL logic signal (H-sync) connected to EXTSYNC (as a sync source) to turn on or off the internal clamp circuits. See Table 5 for channel assignment, clamp voltage level, and sync source. Table 1. Jumper Functions (JU1–JU4) JU1 SHUNT LOCATION JU2 SHUNT LOCATION JU3 SHUNT LOCATION JU4 SHUNT LOCATION INPUT TERMINATION Pins 1 and 2 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 Pins 2 and 3 All other combinations 200Ω Undefined Note: To emulate a 200Ω DAC source resistor when driving from a 75Ω generator, remove jumpers JU8, JU10, JU11, and JU12. The 162Ω resistor added to the standard 75Ω terminate equals approximately 200Ω. Table 2. JU5 Functions (GAIN) JU5 SHUNT LOCATION GAIN PIN MAX7445 OUTPUT BUFFER GAIN (dB) Pins 1 and 2 Connected to VCC +9.5 Pins 2 and 3 (default) Connected to GND +6.0 Open (not installed) Floating +12 2 _______________________________________________________________________________________ MAX7445 Evaluation Kit Evaluates: MAX7445–MAX7449 Table 3. JU6 Functions (SELECT) OPERATING MODE JU6 SHUNT LOCATION SELECT PIN Pins 1 and 2 CHANNEL CHANNEL ASSIGNMENT A CVBS 0.8 Channel A B Y 0.8 Channel A Connected to VCC Pins 2 and 3 (default) Connected to GND Open (not installed) Floating CLAMP LEVEL (V) SYNC SOURCE C C 1.6 Channel A D CVBSASYNC 0.8 Channel D A CVBS 0.8 Channel A B R 1.4 Channel A C G 1.4 Channel A D B 1.4 Channel A A G (with sync) 0.8 Channel A B R 1.4 Channel A C B 1.4 Channel A D CVBSASYNC 0.8 Channel D Table 4. JU7 Functions (DISABLE) JU7 SHUNT LOCATION DISABLE PIN MAX7445 OUTPUT Pins 1 and 2 Connected to VCC Outputs disabled Pins 2 and 3 (default) Connected to GND Outputs enabled Open (not installed) Floating Undefined Table 5. MAX7449 Channel Assignment EV KIT I/O LABELS CHANNEL ASSIGNMENT CLAMP LEVEL (V) SYNC SOURCE IPB, OPB R 1.4 EXTSYNC IPC, OPC G 1.4 EXTSYNC IPD, OPD B 1.4 EXTSYNC Note: JU9 is closed. _______________________________________________________________________________________ 3 4 IPC Figure 1. MAX7445 EV Kit Schematic _______________________________________________________________________________________ 3 1 2 R11 200Ω JU3 IPD 3 1 2 R10 200Ω JU2 R4 75Ω NOTE: ALL RESISTORS ARE 1% UNLESS OTHERWISE SPECIFIED. R3 75Ω IPB R2 75Ω IPA R1 75Ω 3 1 2 3 1 2 R16 162Ω JU12 R15 162Ω JU11 R14 162Ω JU10 R13 162Ω JU8 EXTSYNC R12 200Ω JU4 R9 200Ω JU1 1 2 3 R17 0Ω JU7 VCC C6 0.1µF C5 0.1µF C4 0.1µF C3 0.1µF JU9 VCC 6 5 4 3 2 1 GND DISABLE IND INC INB INA U1 C2 0.1µF C1 1µF OUTD OUTC OUTB OUTA GAIN SELECT GND 8 GND MAX7445 VCC 10 VCC VCC TERMINAL BLOCK JU6 1 2 3 VCC R8 75Ω R7 75Ω R6 75Ω R5 75Ω 7 JU5 9 11 12 13 14 1 2 3 VCC C10 220µF JU16 C9 220µF JU15 C8 220µF JU14 C7 220µF JU13 OPD OPC OPB OPA Evaluates: MAX7445–MAX7449 MAX7445 Evaluation Kit MAX7445 Evaluation Kit Evaluates: MAX7445–MAX7449 Figure 2. MAX7445 EV Kit Component Placement Guide—Top Silkscreen _______________________________________________________________________________________ 5 Evaluates: MAX7445–MAX7449 MAX7445 Evaluation Kit Figure 3. MAX7445 EV Kit PC Board Layout—Component Side 6 _______________________________________________________________________________________ MAX7445 Evaluation Kit Evaluates: MAX7445–MAX7449 Figure 4. MAX7445 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 7 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.