ISL22346

Features:

• Four potentiometers in one package
• 128 resistor taps
• I2C serial interface
- Three address pins, up to eight devices/bus
• Non-volatile storage of wiper position
• Wiper resistance: 70 typical @ 3.3V
• Shutdown mode
• Shutdown current 5A max
• Power supply: 2.7V to 5.5V
• 50k or 10k total resistance
• High reliability
- Endurance: 1,000,000 data changes per bit per register
- Register data retention: 50 years @ T <55
• 20 Ld TSSOP
• Pb-free plus anneal product (RoHS compliant)




Pinout






Specifications

Storage Temperature . . . . . . . . . . . . . . . . . . . . . .-65 to +150
Voltage at any Digital Interface Pin
with Respect to GND . . . . . . . . . . . . . . . . . . . . . -0.3V to V_CC+0.3
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to +6V
Voltage at any DCP Pin with Respect to GND. . . . . . . -0.3V to V_CC
Lead Temperature (Soldering, 10s) . . . . . . . . . . . . . . . . . . . 300
IW (10s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±6mA
Latchup (Note 4) . . . . . . . . . . . . . . . .. Class II, Level B @ +125
ESD (HBM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5kV
(CDM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1kV




Description

The ISL22346 integrates four digitally controlled potentiometers (DCP) and non-volatile memory on a monolithic CMOS integrated circuit. The digitally controlled potentiometers are implemented with a combination of resistor elements and CMOS switches. The position of the wipers are controlled by the user through the I2C bus interface. Each potentiometer has an associated volatile Wiper 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. At power-up the device recalls the contents of the two DCPs IVR to the corresponding WRs. The DCPs can be used as a three-terminal potentiometers or as a two-terminal variable resistors in a wide variety of applications including control, parameter adjustments, and signal processing.