- 您现在的位置：买卖IC网 > Sheet目录1228 > MAX7474EVKIT+ (Maxim Integrated Products)KIT EVAL FOR MAX7474
MAX7474 Evaluation Kit
Quick Start
Required Equipment
Before beginning, the following equipment is needed:
? 5V, > 100mA DC power supply
? Video signal generator (e.g., Tektronix TG-700 or
equivalent)
? Video measurement equipment (e.g., Tektronix VM-
700T or equivalent)
? Active differential cable driver
Procedure
The MAX7474 EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Caution: Do not turn on the power supply until all
connections are completed.
1) Install a shunt across pins 2-3 of jumper JU1 and a
shunt across pins 1-2 of jumper JU2 (for ≥ 225m
manual cable length equalization).
2) Install a shunt across pins 1-2 of jumper JU3
(back-porch DC level set by R4).
3) Verify that no shunt is installed on jumper JU4 (AC-
coupled video output).
4) Connect the differential video input signal to the
VIN connector or the V_INP and VINN test points.
5) Connect the VOUT BNC connector on the EV kit to
the input of the video measurement equipment.
6) Connect the power-supply ground to the GND pad
on the EV kit.
7) Connect the 5V DC power supply to the VCC pad
on the EV kit.
8) Set the video signal generator for the desired video
input signal.
9) Turn on the power supply and enable the video
signal generator output.
The MAX7474 EV kit accepts differential video input
signals and provides a single-ended output nominal
1V P-P . A differential video input signal can be connect-
ed to the VIN RJ-45 connector (pins 7-8), or the V_INP
and V_INN test points on the MAX7474 EV kit. See
Table 4 in the Jumper Selection section for the VIN RJ-
45 connector pin configuration.
The MAX7474 EV kit automatically equalizes the base-
band composite video signal from a low-cost UTP cable,
and provides an option to set the fixed equalization
level to compensate for different input cable lengths up
to 300m in the absence of a burst signal. The MAX7474
fixed equalization level is jumper selectable. See the
Jumper Selection section for more details.
The MAX7474 EV kit provides an option to set the
back-porch DC level for the video output signal. The
video output’s back-porch DC level can be set by an
on-board voltage reference (U2) or by an external volt-
age source connected to the BP_LVL BNC connector.
U2 is a MAX6037 voltage reference that provides an
on-board 0 to 2.5V voltage reference for the back-
porch DC level. Potentiometer R4 is used to set the
back-porch DC level. The back-porch DC level is set to
1.4V at the factory. See the Jumper Selection section
for more detail.
Jumper Selection
Fixed Equalization Level (FEQ0, FEQ1)
The MAX7474 EV kit provides an option to set the fixed
equalization level for the video input signal to compen-
sate for different cable lengths in the absence of burst.
Jumpers JU1 and JU2 set the fixed equalization level
pins (FEQ0 and FEQ1) of the MAX7474 IC. When using
cable lengths greater than 75m, set the fixed equaliza-
tion level according to Table 1.
Table 1. JU1 and JU2 Jumper Selection
(FEQ0, FEQ1)
10) Analyze the video output signal with the video
measurement equipment.
Detailed Description of Hardware
SHUNT POSITION
JU2 JU1
(FEQ1) (FEQ0)
EQUALIZATION
LEVEL (dB)
COMPENSATED
CABLE
LENGTH (m)
The MAX7474 EV kit is designed to evaluate the
MAX7474 in a 16-pin SSOP package. The MAX7474 is
an adaptive equalizer for video over UTP cable. The EV
kit circuit is designed on a 2-layer, 1oz copper PCB
and all components are installed on the top layer. The
2-3 (low)
2-3 (low)
1-2* (high)
1-2 (high)
2-3 (low)
1-2 (high)
2-3* (low)
1-2 (high)
0
+4.5
+10.5
+10.5
0 to 75
75 to 225
≥ 225
≥ 225
MAX7474 EV kit operates from a 5V DC power supply
that can deliver at least 100mA of current.
*Default position.
2
_______________________________________________________________________________________
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
MAX8525EVKIT
EVAL KIT FOR MAX8525
MAX8536EVKIT
EVAL KIT FOR MAX8536
MAX8555AEVKIT
EVAL KIT FOR MAX8555
MAX8814EVKIT+
KIT EVAL FOR MAX8814
MAX8821EVKIT+
KIT EVAL FOR MAX8821
MAX9235EVKIT+
KIT EVAL FOR MAX9235
MAX9258EVKIT+
EVAL KIT FOR MAX9258
MAX9390EVKIT+
KIT EVAL FOR MAX9390
相关代理商/技术参数
MAX747CPD
功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
MAX747CPD+
功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
MAX747CSD
功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
MAX747CSD+
功能描述:DC/DC 开关控制器 Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
MAX747CSD+T
功能描述:DC/DC 开关控制器 Integrated Circuits (ICs)
RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
MAX747CSD-T
功能描述:DC/DC 开关控制器
RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
MAX747EPD
功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
MAX747ESD
功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK