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19-2802; Rev 0; 4/03
MAX7440 Evaluation Kit
General Description
The MAX7440 evaluation kit (EV kit) is a fully assembled and tested surface-mount board. The MAX7440 EV kit includes the MAX7440, a six-channel reconstruction filter, unity-gain input-level-shift circuits, and output buffers with a gain of 2V/V. The input and output buffers are included to ease the evaluation of the MAX7440, and are not needed in the actual application. The MAX7440 EV kit can be also used to evaluate the MAX7441 and MAX7442.
Features
o Selectable Input 75 Termination or DAC Termination o Input Buffer Bypass Option o Output Buffer to Drive Cable o Separate Level Shift Settings for Each Channel o Direct-Coupled Input/Direct-Coupled Output o Surface-Mount Construction o Fully Assembled and Tested
Evaluates: MAX7440/MAX7441/MAX7442
Component List
DESIGNATION C1, C2, C3, C23-C27 QTY 8 DESCRIPTION 1F 10%, 10V X5R ceramic capacitors (0603) TDK C1608X5R1A105K 0.1F 10%, 16V X7R ceramic capacitors (0603) Taiyo Yuden EMK107BJ104KA or TDK C1608X7R1C104KT BNC PC board mount connectors 3-pin headers 2-pin headers 75 1% resistors (0603) 200 1% resistors (0603) 162 1% resistors (0603) 511 1% resistors (0805) 511 0.1% resistors (0805) IRC PFC-W0805R-03-5110B 5.11k 1% resistors (0805) 5.76k 1% resistors (0805) Three-circuit terminal block Six-circuit terminal block MAX7440ESD (14-pin SO) MAX4390EXT-T (6-pin SC70, Top Mark ABE) Shunts MAX7440 PC board PART MAX7440EVKIT
Ordering Information
TEMP RANGE 0C to +70C IC PACKAGE 14 SO
Note: To evaluate the other devices MAX7441/MAX7442, please order a free MAX7441ESD/MAX7442ESD sample with the MAX7440EVKIT.
C4-C22
18
Quick Start
* * *
Recommended Equipment
Three 5.0VDC power supplies (optionally one) Video signal generator (e.g., Tektronix TG 2000) Video measurement equipment (e.g., Tektronix VM 700A)
INPUT1-INPUT6, OUTPUT1-OUTPUT6 JU1-JU18 JU19-JU35 R1-R12 R13-R18 R19-R24 R25-R36 R37-R48 R49-R54 R55-R60 TB1 TB2 U1 U2-U13 None None
12 18 17 12 6 6 12 12 6 6 1 1 1 12 35 1
Recommended Channel Assignment
CHANNEL NO. 1 2 3 4 5 6 ASSIGNMENT CVBS Y or G Pr or R Pb or B Y C
The MAX7440 EV kit is a fully assembled and tested surface-mount board. Utilize the following steps to verify the board operation. Do not turn on the power supply until all connections are completed.
Evaluating Channel 1 with a GroundReferenced Video Generator
1) Verify that there are shunts across on JU1 (pins 1 and 2), JU2 pins (1 and 2), and JU3 pins (1 and 2). 2) Verify that there are shunts across jumpers JU19 and JU31.
________________________________________________________________ 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.
MAX7440 Evaluation Kit Evaluates: MAX7440/MAX7441/MAX7442
Component Suppliers
SUPPLIER IRC Taiyo Yuden TDK PHONE 361-992-7900 800-348-2496 847-803-6100 FAX 361-992-3377 847-925-0899 847-390-4405 WEBSITE www.irctt.com www.t-yuden.com www.component.tdk.com
Note: Please indicate that you are using the MAX7440/MAX7441/MAX7442 when contacting these suppliers.
3) Connect the output of the ground-referenced video signal generator to the INPUT1 BNC connector on the EV kit. 4) Connect the input of the ground-referenced video measurement equipment to the OUTPUT1 BNC connector on the EV kit. 5) Connect all grounds of the power supplies together. Connect the power-supply ground to GND. 6) Connect one 5.0V supply to the three-circuit terminal block labeled VCC1. Connect another 5.0V supply to VCC2. 7) Connect the third 5.0V supply to the six-circuit terminal block labeled VB1. 8) Set the video signal generator for the desired video input signal, such as multiburst sweep. 9) Turn on all power supplies, and enable the signal generator. 10)Analyze the output signal with the VM700 video measurement equipment. Note 1: To evaluate the other channel(s), see Tables 1 and 3 for jumper settings. Note 2: VCC1: 5V max VCC2: 5V typ, 10V max VB1-VB6: 5V typ, 10V max
Detailed Description
Input Level-Shift Circuit
The MAX7440 EV kit is designed for evaluating the MAX7440/MAX7441/MAX7442 with ground-referenced video equipment or a DAC output with 200 termination. To evaluate the EV kit with ground-referenced video equipment, the input signals need to be level shifted before entering the MAX7440/MAX7441/ MAX7442, since most video generators are bipolar and ground referenced. The input buffer (MAX4390) is used with an external bias voltage as a level shift circuit with a gain of +1V/V. The MAX7440 EV kit provides jumpers JU1, JU4, JU7, JU10, JU15, and JU18 to terminate the input signals with either 75 or 200. Table 1 lists jumper settings for the ground-referenced video equipment. To evaluate the EV kit with an input signal coming directly from a video DAC or video encoder output, the level shift circuit needs to be bypassed. Table 2 lists the jumpers' settings for evaluating with a DAC.
Table 1. Jumper Settings for Evaluating with Ground-Referenced Video Equipment
CHANNEL INPUT1 INPUT2 INPUT3 INPUT4 INPUT5 INPUT6 TERMINATION JUMPER JU1, pins 1 and 2 JU4, pins 1 and 2 JU7, pins 1 and 2 JU10, pins 1 and 2 JU13, pins 1 and 2 JU16, pins 1 and 2 LEVEL SHIFT BYPASS JUMPER JU2, pins 1 and 2 JU5, pins 1 and 2 JU8, pins 1 and 2 JU11, pins 1 and 2 JU14, pins 1 and 2 JU17, pins 1 and 2 JU3, pins 1 and 2 JU6, pins 1 and 2 JU9, pins 1 and 2 JU12, pins 1 and 2 JU15, pins 1 and 2 JU18, pins 1 and 2
2
_______________________________________________________________________________________
MAX7440 Evaluation Kit Evaluates: MAX7440/MAX7441/MAX7442
Table 2. Jumper Settings for Evaluating with a DAC
CHANNEL INPUT1 INPUT2 INPUT3 INPUT4 INPUT5 INPUT6 TERMINATION JUMPER JU1, pins 2 and 3 JU4, pins 2 and 3 JU7, pins 2 and 3 JU10, pins 2 and 3 JU13, pins 2 and 3 JU16, pins 2 and 3 LEVEL SHIFT BYPASS JUMPER JU2, pins 2 and 3 JU5, pins 2 and 3 JU8, pins 2 and 3 JU11, pins 2 and 3 JU14, pins 2 and 3 JU17, pins 2 and 3 JU3, pins 2 and 3 JU6, pins 2 and 3 JU9, pins 2 and 3 JU12, pins 2 and 3 JU15, pins 2 and 3 JU18, pins 2 and 3
Note: To emulate a 200 DAC source resistor, remove jumpers JU19, JU21, JU23, JU25, JU27, and JU29. The 162 resistor added to the standard 75 termination equals approximately 200.
Bias Voltage
An external bias voltage is required in the level shift circuit for every channel. The MAX7440 EV kit provides options to tie each bias voltage to VB1 or to have an individual bias voltage. If the individual bias voltage is desired, remove its respective jumper and connect it to a separate power supply. Table 3 lists the bias voltage settings. Do not set a bias voltage higher than 10V.
Table 3. Bias Voltage Settings
CHANNEL INPUT2 INPUT3 INPUT4 INPUT5 INPUT6 BIAS VOLTAGE JUMPER JU20, installed JU20, not installed JU22, installed JU22, not installed JU24, installed JU24, not installed JU26, installed JU26, not installed JU28, installed JU28, not installed BIAS VOLTAGE Connected to VB1 Connected to VB2 Connected to VB1 Connected to VB3 Connected to VB1 Connected to VB4 Connected to VB1 Connected to VB5 Connected to VB1 Connected to VB6
Output Buffers The MAX7440/MAX7441/MAX7442 require external buffering to drive a standard 150 video load. The MAX7440 EV kit uses the MAX4390 op amp configured to a gain of +2V/V to drive standard video loads. If the output buffer is not needed, remove the shunts from jumpers JU30-JU35. Access the output signals from test points OUT1-OUT6. To alleviate any output clipping, increase VCC2 up to 10V. Since the circuit is DC-coupled and the output buffer has a gain of 2V/V, output clipping can occur if the level shift input circuitry is set incorrectly. This can be resolved by either using different power supplies for the level shift input circuitry, or by increasing VCC2 up to 10V. (Remember to keep VCC1 at 5V.) Evaluating MAX7441/MAX7442 The MAX7440 EV kit can also be used to evaluate the MAX7441/MAX7442. To evaluate the MAX7441/MAX7442, replace the MAX7440ESD with a MAX7441ESD/ MAX7442ESD.
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3
MAX7440 Evaluation Kit Evaluates: MAX7440/MAX7441/MAX7442
TB1 VB1 R1 75 1% C5 0.1F IN1 INPUT1 1 2 JU1 3 R13 200 1% JU19 R19 162 1% R55 5.76k 1% TERMINAL BLOCK VCC2 VCC1 C1 1F C6 0.1F 3 U2 R49 5.11k 1%
MAX4390
TB2 VCC1 VCC2 C2 1F TB2-1 VB1 VB1 JU20 VB2 TB2-2 VB3 JU22 VB3 TB2-3 VB4 JU24 C25 1F C24 1F VB2 C23 1F TERMINAL BLOCK VB1 C3 1F
VCC1 GND
TB1-1 TB1-2 TB1-3
R25 511 1% 1 2 3
C4 0.1F
VCC2
6 1 R26 511 1% 1 2 3 JU3 1 IN1 4 VCC 11 GND
JU2
4 2
U1 VB2 R2 75 1% C7 0.1F IN2 INPUT2 1 2 JU4 3 R14 200 1% JU21 R20 162 1% R56 5.76k 1% VCC2
MAX7440
OUT1 14 13 12 10 9 8 OUT1 OUT2 JU26 OUT3 OUT4 OUT5 OUT6 VB6 TB2-6 VB5 TB2-5 VB6 JU28 VB4 TB2-4 VB5 C8 0.1F 3 U3 6 1 R28 511 1% 1 2 3 JU6 2 IN2 OUT6
MAX4390
R27 511 1% 1 2 3
OUT2 OUT3 OUT4 OUT5
C26 1F
JU5
R50 5.11k 1%
4 2
C27 1F
VB3 R3 75 1% C9 0.1F IN3 INPUT3 1 2 JU7 3 R15 200 1% JU23 R21 162 1%
R57 5.76k 1%
VCC2
VCC2
R60 5.76k 1%
VB6 R6 75 1% C15 0.1F R24 162 1% IN6 1 2 3 JU29 R18 200 1% JU16 INPUT6
R29 511 1% 1 2 3
C10 0.1F 3 U4 6 1 R30 511 1% 1 2 3 JU9 3 IN3 IN6 7 JU18 1 2 3
C16 0.1F 6 1 R36 511 1% U7
MAX4390
3
R35 511 1% 1 2 3
JU8
JU17
R51 5.11k 1%
MAX4390
4 2
4 2
R54 5.11k 1%
VB4 R4 75 1% C11 0.1F IN4 INPUT4 1 2 JU10 3 R16 200 1% JU25 R22 162 1%
R58 5.76k 1%
VCC2
VCC2
R59 5.76k 1%
VB5 R5 75 1% C13 0.1F R23 162 1% IN5 1 2 3 JU27 R17 200 1% JU13 INPUT5
R31 511 1% 1 2 3
C12 0.1F 3 U5 6 1 R32 511 1% 1 2 3 JU12 5 IN4 IN5 6 JU15 1 2 3
C14 0.1F 6 1 R34 511 1% U6
MAX4390
3
R33 511 1% 1 2 3
JU11
JU14
R52 5.11k 1%
MAX4390
4 2
4 2
R53 5.11k 1%
Figure 1. MAX7440 EV Kit Schematic (Sheet 1 of 2) 4 _______________________________________________________________________________________
MAX7440 Evaluation Kit Evaluates: MAX7440/MAX7441/MAX7442
VCC2 OUT1 JU31 OUT1 3 U8 R37 511 0.1%
MAX4390
C17 0.1F 6 1 R38 511 0.1%
R7 75 1%
OUTPUT1
4 2
VCC2 OUT2 JU32 OUT2 3 U9 R39 511 0.1%
MAX4390
C18 0.1F 6 1 R40 511 0.1%
R8 75 1%
OUTPUT2
4 2
VCC2 OUT3 JU33 OUT3 3 U10 R41 511 0.1%
MAX4390
C19 0.1F 6 1 R42 511 0.1%
R9 75 1%
OUTPUT3
4 2
VCC2 OUT4 JU34 OUT4 3 U11 R43 511 0.1%
MAX4390
C20 0.1F 6 1 R44 511 0.1%
R10 75 1%
OUTPUT4
4 2
VCC2 OUT5 JU35 OUT5 3 U12 R45 511 0.1%
MAX4390
C21 0.1F 6 1 R46 511 0.1%
R11 75 1%
OUTPUT5
4 2
VCC2 OUT6 JU30 OUT6 3 U13 R47 511 0.1%
MAX4390
C22 0.1F 6 1 R48 511 0.1%
R12 75 1%
OUTPUT6
4 2
Figure 2. MAX7440 EV Kit Schematic (Sheet 2 of 2) _______________________________________________________________________________________ 5
MAX7440 Evaluation Kit Evaluates: MAX7440/MAX7441/MAX7442
Figure 3. MAX7440 EV Kit Component Placement Guide--Component Side 6 _______________________________________________________________________________________
MAX7440 Evaluation Kit Evaluates: MAX7440/MAX7441/MAX7442
Figure 4. MAX7440 EV Kit PC Board Layout--Component Side _______________________________________________________________________________________ 7
MAX7440 Evaluation Kit Evaluates: MAX7440/MAX7441/MAX7442
Figure 5. MAX7440 EV Kit PC Board Layout--Inner Layer 2 (GND Layer) 8 _______________________________________________________________________________________
MAX7440 Evaluation Kit Evaluates: MAX7440/MAX7441/MAX7442
Figure 6. MAX7440 EV Kit PC Board Layout--Inner Layer 3 (VCC1 and VCC2 Layers) _______________________________________________________________________________________ 9
MAX7440 Evaluation Kit Evaluates: MAX7440/MAX7441/MAX7442
Figure 7. MAX7440 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.
10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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