Data Sheet AD5291/AD5292
256-/1024-Position, Digital Potentiometers with Maximum ±1% R-Tolerance Error
and 20-TP Memor...
Data Sheet AD5291/AD5292
256-/1024-Position, Digital Potentiometers with Maximum ±1% R-Tolerance Error
and 20-TP Memory
FEATURES
FUNCTIONAL BLOCK DIAGRAM
► Single-channel, 256-/1024-position resolution ► 20 kΩ, 50 kΩ, and 100 kΩ nominal resistance ► Maximum ±1% nominal resistor tolerance error (resistor perform-
ance 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 ► SPI-compatible serial interface ► Wiper setting readback ► Power-on refreshed from 20-TP memory
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
VLOGIC SCLK SYNC DIN SDO RDY
VDD POWER-ON
RESET
RESET
AD5291/ AD5292
RDAC
REGISTER
A
SERIAL DATA
INTERFACE
W
OTP
MEMORY
BLOCK
B
VSS
EXT_CAP GND
Figure 1.
07674-001
GENERAL DESCRIPTION
The AD5291/AD5292 are single-channel, 256-/1024-position digital potentiometers that combine industry leading variable resistor performance with nonvolatile memory (NVM) in a compact package. These devices are capable of operating 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 ...