AD5122A Dual Channel, 128-Position, I2C, Nonvolatile Digital Potentiometer

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 tolerance matching.

The linear gain setting mode allows independent programming of the resistance between the digital potentiometer terminals, RAW and RWB, allowing very accurate resistor matching.

The high bandwidth and low total harmonic distortion (THD) ensure an optimal performance for ac signals, making it suitable for filter design.

The low wiper resistance at the ends of the resistor array of only 40 Ω, allowing pin-to-pin connection.

The wiper values can be set through an I2C-compatible digital interface that is also used to readback the wiper register and EEPROM content.

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.

Applications

Portable electronics level adjustment
LCD panel brightness and contrast controls
Programmable filters, delays, time constants
Programmable power supplies

Features and Benefits

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 < 100 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

Digital to Analog Converters

Digital Potentiometers

IBIS Models

AD5122A/AD5142A IBIS Model .IBS

Data Sheets

Document	note
AD5122A/AD5142A: Dual Channel, 128-/256-Position, I2C, Nonvolatile Digital Potentiometer Data Sheet (Rev. A)	PDF 646 kB

Application Notes

Document	note
AN-1291: Digital Potentiometers: Frequently Asked Questions (Rev. A)	PDF 805 kB
AN-1169: Linear Gain Setting Mode: A Detailed Description (Rev. A)	PDF 214 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD5122ABCPZ10-RL7 Production	16 ld LFCSP (3x3mm, 1.6mm exposed pad)	REEL 1500	-40 to 125C	0	1.45	Y
AD5122ABCPZ100-RL7 Production	16 ld LFCSP (3x3mm, 1.6mm exposed pad)	REEL 1500	-40 to 125C	0	1.45	Y
AD5122ABRUZ10 Production	16 ld TSSOP	OTH 96	-40 to 125C	1.61	1.45	Y
AD5122ABRUZ10-RL7 Production	16 ld TSSOP	REEL 1000	-40 to 125C	0	0	Y
AD5122ABRUZ100 Production	16 ld TSSOP	OTH 96	-40 to 125C	1.61	1.45	Y
AD5122ABRUZ100-RL7 Production	16 ld TSSOP	REEL 1000	-40 to 125C	0	0	Y