GENERAL DESCRIPTION

The AD5172/AD5173 are dual-channel, 256-position, one-time programmable (OTP) digital potentiometers1 that employ fuse link technology to achieve memory retention of resistance settings. OTP is a cost-effective alternative to EEMEM for users who do not need to program the digital potentiometer setting in memory more than once. These devices perform the same electronic adjustment function as mechanical potentiometers or variable resistors but with enhanced resolution, solid-state reliability, and superior low temperature coefficient performance.

FEATURES

2-channel, 256-position potentiometers

One-time programmable (OTP) set-and-forget resistance

setting provides a low cost alternative to EEMEM

Unlimited adjustments prior to OTP activation

OTP overwrite allows dynamic adjustments with user-defined preset

End-to-end resistance: 2.5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ

Compact 10-lead MSOP: 3 mm × 4.9 mm

Fast settling time: tS = 5 μs typical on power-up

Full read/write of wiper register

Power-on preset to midscale

Extra package address decode pins: AD0 and AD1 (AD5173 )

Single supply: 2.7 V to 5.5 V

Low temperature coefficient: 35 ppm/°C

Low power: IDD = 6 μA maximum

Wide operating temperature: −40°C to +125°C

APPLICATIONS

Systems calibration

Electronics level setting

Mechanical trimmers replacement in new designs

Permanent factory PCB setting

Transducer adjustment of pressure, temperature, position,

chemical, and optical sensors

RF amplifier biasing

Automotive electronics adjustment

Gain control and offset adjustment