AD5291 Single Channel, 256-Position, 1% R-Tol, Digital Potentiometer with 20-Times Programmable Memory

The AD5291 and AD5292 are single-channel, 256-/1024-position digital potentiometers1 that combine industry leading variable resistor performance with nonvolatile memory (NVM) in a compact package. These devices are capable of operat-ing across a wide voltage range, supporting both dual supply operation at ±10.5 V to ±16.5 V and single supply operation at +21 V to +33 V, while ensuring less than 1% end-to-end resistor tolerance error and offering 20-time programmable (20-TP) memory.

The guaranteed industry leading low resistor tolerance error feature simplifies open-loop applications as well as precision calibration and tolerance matching applications.

The AD5291 and AD5292 device wiper settings are controllable through the SPI digital interface. Unlimited adjustments are allowed before programming the resistance value into the 20-TP memory. The AD5291 and AD5292 do not require any external voltage supply to facilitate fuse blow, and there are 20 opportunities for permanent programming. During 20-TP activation, a permanent blow fuse command freezes the wiper position (analogous to placing epoxy on a mechanical trimmer).

The AD5291 and AD5292 are available in a compact 14-lead TSSOP package. The part is guaranteed to operate over the extended industrial temperature range of −40°C to +105°C.

1The terms digital potentiometer and RDAC are used interchangeably.

Applications

Mechanical potentiometer replacement
Instrumentation: gain and offset adjustment
Programmable voltage-to-current conversion
Programmable filters, delays, and time constants
Programmable power supply
Low resolution DAC replacement
Sensor calibration

Features and Benefits

Single-channel, 256-/1024-position resolution
20 kΩ, 50 kΩ, and 100 kΩ
nominal resistance
Maximum ±1% nominal resistor tolerance error (resistor performance mode)
20-times programmable wiper memory

Rheostat mode temperature coefficient: 35 ppm/°C
Voltage divider temperature coefficient: 5 ppm/°C
+9 V to +33 V single-supply operation
±9 V to ±16.5 V dual-supply operation
See data sheet for additional features

Digital to Analog Converters

Digital Potentiometers

IBIS Models

AD529x IBIS Model .IBS

Data Sheets

Document	note
AD5291/AD5292: 256-/1024-Position, Digital Potentiometers with Maximum ±1% R-Tolerance Error and 20-TP Memory Data Sheet (Rev. E)	PDF 387 kB

Application Notes

Document	note
AN-1291: Digital Potentiometers: Frequently Asked Questions (Rev. A)	PDF 805 kB
AN-1205: 30 V Low Cost DAC Using the AD5292 Digital Potentiometer (Rev. B)	PDF 225 kB
AN-1206: Variable Gain Inverting Amplifier Using the AD5292 Digital Potentiometer and the OP184 Op Amp (Rev. C)	PDF 177 kB

Frequently Asked Questions

Document	note

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD5291BRUZ-100 Production	14 ld TSSOP	OTH 96	-40 to 105C	2.79	2.29	Y
AD5291BRUZ-100-RL7 Production	14 ld TSSOP	REEL 1000	-40 to 105C	0	2.29	Y
AD5291BRUZ-20 Production	14 ld TSSOP	OTH 96	-40 to 105C	2.79	2.29	Y
AD5291BRUZ-20-RL7 Production	14 ld TSSOP	REEL 1000	-40 to 105C	0	2.29	Y
AD5291BRUZ-50 Production	14 ld TSSOP	OTH 96	-40 to 105C	2.79	2.29	Y
AD5291BRUZ-50-RL7 Last Time Buy	14 ld TSSOP	REEL 1000	-40 to 105C	0	2.29	Y