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参数资料
| 型号： | MAX5424ETA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/11页 |
| 文件大小： | 0K |
| 描述： | IC POT DGTL 256-TAP NV 8-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 接片： | 256 |
| 电阻（欧姆）： | 200k |
| 电路数： | 1 |
| 温度系数： | 标准值 35 ppm/°C |
| 存储器类型： | 非易失 |
| 接口： | 3 线串口 |
| 电源电压： | 2.7 V ~ 5.25 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WDFN 裸露焊盘 |
| 供应商设备封装： | 8-TDFN-EP（3x3） |
| 包装： | 标准包装 |
| 其它名称： | MAX5424ETA+TDKR |
Write Wiper Register
Data written to this register (C1, C0 = 00) controls the
wiper positions. The 8 data bits (D7 to D0) indicate the
position of the wiper. For example, if DIN = 0000 0000,
the wiper moves to the position closest to L. If DIN =
1111 1111, the wiper moves closest to H.
This command writes data to the volatile random
access memory (RAM), leaving the NV registers
unchanged. When the device powers up, the data
stored in the NV registers transfers to the volatile wiper
register, moving the wiper to the stored position.
Write NV Register
The “write NV register” command (C1, C0 = 01) stores
the position of the wipers to the NV registers for use at
power-up. Alternatively, the “copy wiper register to NV
register” command writes to the NV register. Writing to the
NV registers, does not affect the position of the wipers.
Copy Wiper Register to NV Register
The “copy wiper register to NV register” command (C1,
C0 = 10) stores the current position of the wiper to the
NV register for use at power-up.
Copy NV Register to Wiper Register
The “copy NV register to wiper register” (C1, C0 = 11)
restores the wiper position to the current value stored in
the NV register.
Standby Mode
The MAX5422/MAX5423/MAX5424 feature a low-power
standby mode. When the device is not being pro-
grammed, it enters into standby mode and supply cur-
rent drops to 0.5A (typ).
Nonvolatile Memory
The internal EEPROM consists of a nonvolatile register
that retains the last value stored prior to power-down.
The nonvolatile register is programmed to midscale at
the factory. The nonvolatile memory is guaranteed for
50 years for wiper data retention and up to 200,000
wiper write cycles.
Power-Up
Upon power-up, the MAX5422/MAX5423/MAX5424
load the data stored in the nonvolatile wiper register
into the volatile wiper register, updating the wiper posi-
tion with the data stored in the nonvolatile wiper regis-
ter. This initialization period takes 10s.
Applications Information
The MAX5422/MAX5423/MAX5424 are intended for cir-
cuits requiring digitally controlled adjustable resis-
tance, such as LCD contrast control (where voltage
biasing adjusts the display contrast), or programmable
filters with adjustable gain and/or cutoff frequency.
Positive LCD Bias Control
Figures 3 and 4 show an application where a voltage-
divider or variable resistor is used to make an
adjustable, positive LCD-bias voltage. The op amp pro-
vides buffering and gain to the resistor-divider network
made by the potentiometer (Figure 3) or to a fixed
resistor and a variable resistor (see Figure 4).
MAX5422/MAX5423/MAX5424
256-Tap, Nonvolatile, SPI-Interface,
Digital Potentiometers
_______________________________________________________________________________________
9
VOUT
30V
5V
W
H
L
MAX5422
MAX5423
MAX5424
Figure 3. Positive LCD-Bias Control Using a Voltage-Divider
VOUT
30V
5V
W
H
L
MAX5422
MAX5423
MAX5424
Figure 4. Positive LCD-Bias Control Using a Variable Resistor
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5426AEUD | 功能描述:特殊用途放大器 RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
| MAX5426AEUD+ | 功能描述:仪表放大器 Prec Resistor Net for Prog Inst Amp RoHS:否 制造商:Texas Instruments 通道数量: 输入补偿电压:150 V 可用增益调整: 最大输入电阻:10 kOhms 共模抑制比（最小值）:88 dB 工作电源电压:2.7 V to 36 V 电源电流:200 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:MSOP-8 封装:Bulk |
| MAX5426AEUD+T | 功能描述:仪表放大器 Prec Resistor Net for Prog Inst Amp RoHS:否 制造商:Texas Instruments 通道数量: 输入补偿电压:150 V 可用增益调整: 最大输入电阻:10 kOhms 共模抑制比（最小值）:88 dB 工作电源电压:2.7 V to 36 V 电源电流:200 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:MSOP-8 封装:Bulk |
| MAX5426AEUD-T | 功能描述:特殊用途放大器 RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
| MAX5426BEUD | 功能描述:特殊用途放大器 RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
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