ISL22426

Features:

• Two potentiometers in one package
• 128 resistor taps
• SPI serial interface
• 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
• 14 Lead 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
V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . -0.3V to +6V
Voltage at any DCP pin with Respect to GND . . . . . -0.3V to V_CC
Lead Temperature (Soldering, 10s) . . . . . . . . . . . .. . . . . . 300
I_W (10s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±6mA
Latchup (Note 4) . . . . . . . . . . . . . . . . Class II, Level B @ +125
ESD (HBM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5kV
(CDM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . .1kV
NOTE:
3. _JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details. 4. Jedec Class II pulse conditions and failure criterion used. Level B exceptions are: using a max positive pulse of 6.5V on the SHDN pin, and using a max negative pulse of -0.8V for all pins.

Description

The ISL22426 integrates two 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 SPI serial 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 ISL22426 recalls the contents of the DCPs IVR to the corresponding WR. The DCPs can be used as three-terminal potentiometers or as two-terminal variable resistors in a wide variety of applications including control, parameter adjustments, and signal processing.