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參數(shù)資料
| 型號： | MAX5424ETA+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 11/11頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC POT DGTL 256-TAP NV 8-TDFN |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 1 |
| 接片： | 256 |
| 電阻（歐姆）： | 200k |
| 電路數(shù)： | 1 |
| 溫度系數(shù)： | 標準值 35 ppm/°C |
| 存儲器類型： | 非易失 |
| 接口： | 3 線串口 |
| 電源電壓： | 2.7 V ~ 5.25 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-WDFN 裸露焊盤 |
| 供應商設備封裝： | 8-TDFN-EP（3x3） |
| 包裝： | 標準包裝 |
| 其它名稱： | 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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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5426AEUD | 功能描述:特殊用途放大器 RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
| MAX5426AEUD+ | 功能描述:儀表放大器 Prec Resistor Net for Prog Inst Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk |
| MAX5426AEUD+T | 功能描述:儀表放大器 Prec Resistor Net for Prog Inst Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk |
| MAX5426AEUD-T | 功能描述:特殊用途放大器 RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
| MAX5426BEUD | 功能描述:特殊用途放大器 RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
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