Dual Channel, 128-/256-Position, SPI,
Nonvolatile Digital Potentiometer
10 kΩ and 100 kΩ resistance options
Resistor tolerance: 8% maximum
Wiper current: ±6 mA
Low temperature coefficient: 35 ppm/°C
Wide bandwidth: 3 MHz
Fast start-up time < 75 µs
Linear gain setting mode
Single- and dual-supply operation
Independent logic supply: 1.8 V to 5.5 V
Wide operating temperature: −40°C to +125°C
3 mm × 3 mm package option
4 kV ESD protection
Portable electronics level adjustment
LCD panel brightness and contrast controls
Programmable filters, delays, and time constants
Programmable power supplies
The AD5122/AD5142 potentiometers provides a nonvolatile
solution for 128-/256-position adjustment applications, offering
guaranteed low resistor tolerance errors of ±8% and up to ±6 mA
current density in the Ax, Bx, and Wx pins.
The low resistor tolerance and low nominal temperature coefficient
simplify open-loop applications as well as applications requiring
The linear gain setting mode allows independent programming
of the resistance between the digital potentiometer terminals,
through the RAW and RWB string resistors, allowing very accurate
The high bandwidth and low total harmonic distortion (THD)
ensure optimal performance for ac signals, making these
devices suitable for filter design.
The low wiper resistance of only 40 Ω at the ends of the resistor
array allows for pin-to-pin connection.
The wiper values can be set through an SPI-compatible digital
interface that is also used to read back the wiper register and
The AD5122/AD5142 is available in a compact, 16-lead, 3 mm ×
3 mm LFCSP and a 16-lead TSSOP. The parts are guaranteed to
operate over the extended industrial temperature range of −40°C
FUNCTIONAL BLOCK DIAGRAM
Table 1. Family Models
1 Two potentiometers and two rheostats.
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