This document is the reference manual for ISL90727, ISL90728 Single Volatile 128-Tap XDCP Digitally Controlled Potentiometer (XDCP™), which introduces the product's function, features, usage methods and application scenarios.
The ISL90727 and ISL90728 are volatile, solid‑state, digitally controlled potentiometers (XDCP) featuring a 127‑element resistor array and 128 wiper tap points. They are intended to replace mechanical potentiometers and are used for sensor adjustment, LCD contrast, RF biasing, and gain control.
Key specifications include a supply voltage range of 2.7 V to 5.5 V, operating temperature from –40 °C to +85 °C, low standby current (500 nA), and an I²C serial interface with addresses 0x5C (ISL90727) and 0x7C (ISL90728). The devices are offered in a 6‑lead SC‑70 package.
| Number of wiper tap points | 128 |
|---|---|
| Resistor array elements | 127 |
| Supply voltage range | 2.7 V to 5.5 V |
| Standby current (max) | 500 nA |
The standby current is specified as 500 nA maximum.
It provides 128 wiper tap points.
The devices operate from 2.7 V to 5.5 V.