ISL95311

Digitally Controlled Potentiometer (XDCP™)

Product Status: Mass Production

OVERVIEW

Terminal Voltage 0V to 13.2V, 128 Taps I2 C Interface

The Intersil ISL95311 is a digitally controlled potentiometer (XDCP). The device consists of a resistor array, wiper switches, a control section, and nonvolatile memory. The wiper position is controlled by an I2 C interface. The potentiometer is implemented by a resistor array composed of 127 resistive elements and a wiper switching network. Between each element and at either end are tap points accessible to the wiper terminal. The wiper of the potentiometer has an associated volatile Wiper Counter Register (WR) and a non-volatile Initial Value Register (IVR) that can be directly written to and read by the user. The contents of the WR controls the position of the wiper on the resistor array through the switches. At power-up, the device recalls the contents of the IVR to the corresponding WR.

The device can be used as a three-terminal potentiometer or as a two-terminal variable resistor in a wide variety of applications, including:
  • LCD contrast control
  • Parameter and bias adjustments
  • Industrial and automotive control
  • Mechanical pot replacement

KEY FEATURES

  • Non-volatile solid-state potentiometer
  • I2C serial interface
  • DCP terminal voltage, 0V to +13.2V
  • 128 wiper tap points - 0.8% resolution
  • Wiper position stored in nonvolatile memory and recalled on power-up
  • 127 resistive elements
  • Temperature compensated
  • Low wiper resistance 70Ω typical @ 3.3V
  • Low power CMOS
  • Standby current, 2µA @ VCC = +3.6V
  • High reliability
  • Endurance, 200,000 data changes per bit
  • Register data retention 50 years @ T < 75°C
  • RTOTAL values = 10kΩ, 50kΩ
  • 10 Ld MSOP package
  • Pb-free available (RoHS compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL95311
Basic Information
生产状态
Mass Production
器件/通道数量
1
抽头数量
128
内存类型
Nonvolatile
总线/输出接口
I2C
阻抗选项 (kΩ)
10
供电电压Vcc (最小值) (V)
2.7
供电电压Vcc (最大值) (V)
5.5
供电电流Icc
5 µA
阻抗变化特性
Linear
VL最小终端电压
0 V
VL最大终端电压
13.2 V
Wiper电流 (mA)
3
Wiper电阻 (Ω)
70
双电源范围 (V)
8 to 13.2
最高工作温度
85 °C
端到端温度系数 (ppm/øC)
45
中点比率温度系数
4
特性
Dual supply required to obtain terminal voltage higher than Vcc
资质级别
Standard
单电源范围 (V)
0 to 13.2
供电电压Vcc范围 (V)
2.7 to 5.5
采样
YES
温度范围
-40 to +85

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