ISL23711
Volatile Digitally Controlled Potentiometer (XDCP™); Terminal Voltage ±3V or ±5V, 128 Taps I²C Serial Interface

Key Features

• I²C Serial Interface with Hardwire Slave Address Allows up to Four Devices
• DCP Terminal Voltage, from V- to V_CC
• 127 Resistive Elements
• Typical R_TOTAL tempco ±50ppm/°C
• Typical ratiometric tempco ±4ppm/°C
• End to end resistance range ±20%
• Wiper resistance = 70Ω typ at V_CC = 3.3V
• Low Power CMOS
• Standby current, 500nA max
• Active current, 200µA max
• V_CC = 2.7V to 5.5V
• V- = -2.7V to -5.5V
• R_TOTAL Values = 10kΩ, 50kΩ
• Volatile Wiper Storage
• Package
• 10 Ld MSOP
• Pb-Free Plus Anneal Available (RoHS Compliant)

Description

The Intersil ISL23711 is a digitally controlled potentiometer (XDCP). The device consists of a resistor array, wiper switches, and a control section. The wiper position is controlled by an I²C interface.

The potentiometer is implemented by a resistor array composed of 127 resistive elements and a wiper switching network. The wiper terminal can be connected to either end of the resistor array or at any one of the Tap Positions in between, providing 128 steps of resolution between RL and RH. The "position" of the wiper is determined by the value assigned to the volatile Wiper Register (WR). The WR can be directly written to and read from using standard I²C interface protocol. The device is available in either a 10kΩ or 50kΩ version.

The device can be used as a three-terminal potentiometer or as a two-terminal variable resistor in a wide variety of applications including:

• Industrial and Automotive Control
• Parameter and Bias Adjustments
• Amplifier Bias and Control