数字电位计 IC IC Dual 8-Bit I2C
Product Details
The AD5280/AD5282 are single-channel and dual-channel, 256-position, digitally controlled variable resistors VRs2. The devices perform the same electronic adjustment function as a potentiometer, trimmer, or variable resistor. Each VR offers a completely programmable value of resistance between the A terminal and the wiper or the B terminal and the wiper. The fixed A-to-B terminal resistance of 20 kΩ, 50 kΩ, or 200 kΩ has a 1% channel-to-channel matching tolerance. The nominal temperature coefficient of both parts is 30 parts per million/ degrees centigrade ppm/°C. Another key feature is that the parts can operate up to +15 V or ±5 V.
Wiper position programming defaults to midscale at system power-on. When powered, the VR wiper position is programmed by an I2C-compatible, 2-wire serial data interface. The AD5280/ AD5282 feature sleep mode programmability. This allows any level of preset in power-up and is an alternative to a costly EEPROM solution. Both parts have additional programmable logic outputs that enable users to drive digital loads, logic gates, LED drivers, and analog switches in their system.
The AD5280/AD5282 are available in thin, surface-mounted 14-lead TSSOP and 16-lead TSSOP. All parts are guaranteed to operate over the extended industrial temperature range of −40°C to +85°C. For 3-wire SPI-compatible interface applica-tions, see the AD5260/AD5262 product information on www.analog.com
**Applications**
* Multimedia, video, and audio
* Communications
* Mechanical potentiometer replacement
* Instrumentation: gain, offset adjustment
* Programmable voltage source
* Programmable current source
* Line impedance matching
1 Assert shutdown and program the device during power-up, then deassert the shutdown to achieve the desired preset level.
2 The terms digital potentiometer, VR, and RDAC are used interchangeably.
Data Sheet, Rev. C, 7/09
### Features and Benefits
±5.5 V dual-supply operation
30 ppm/°C
−40°C to +85°C
容差 ±30 %
供电电流 0.0001 mA
电路数 2
针脚数 256
时钟频率 400kHz max
电阻 50 kΩ
阻值偏差 ±30 %
静态电流 100 nA
工作温度Max 85 ℃
工作温度Min -40 ℃
安装方式 Surface Mount
引脚数 16
封装 TSSOP-16
长度 5 mm
宽度 4.4 mm
高度 1.05 mm
封装 TSSOP-16
工作温度 -40℃ ~ 85℃
温度系数 ±30 ppm/℃
产品生命周期 Active
包装方式 Tape & Reel TR
RoHS标准 RoHS Compliant
含铅标准 Lead Free
ECCN代码 EAR99
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
AD5282BRUZ50-REEL7 ADI 亚德诺 | 当前型号 | 当前型号 |
AD5282BRUZ50 亚德诺 | 完全替代 | AD5282BRUZ50-REEL7和AD5282BRUZ50的区别 |
AD5282BRU50 亚德诺 | 完全替代 | AD5282BRUZ50-REEL7和AD5282BRU50的区别 |
AD5282BRU50-REEL7 亚德诺 | 类似代替 | AD5282BRUZ50-REEL7和AD5282BRU50-REEL7的区别 |