Dual Channel, 128-/256-Position, I2C,
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
FUNCTIONAL BLOCK DIAGRAM
The AD5122A/AD5142A potentiometers provide 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 RAW and RWB the string resistors, allowing very accurate
The high bandwidth and low total harmonic distortion (THD)
ensure optimal performance for ac signals, making it 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 I2C-compatible digital
interface that is also used to read back the wiper register and
The AD5122A/AD5142A are 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 to +125°C.
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Table 1. Family Models
Model Channel Position
AD5121 Single 128
AD5141 Single 256
1 Two potentiometers and two rheostats.
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