AD5292BRUZ-100 Datasheet, PDF (1/32 Pages) Analog Devices – 256-/1024-Position, Digital Potentiometers

256-/1024-Position, Digital Potentiometers with
Maximum ±1% R-Tolerance Error and 20-TP Memory
AD5291/AD5292
FEATURES
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
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
V_LOGIC
SCLK
SYNC
DIN
SDO
RDY
FUNCTIONAL BLOCK DIAGRAM
V_DD
RESET
POWER-ON
RESET
AD5291/
AD5292
RDAC
REGISTER
A
SERIAL DATA
INTERFACE
W
OTP
MEMORY
BLOCK
B
V_SS
EXT_CAP
Figure 1.
GND
GENERAL DESCRIPTION
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 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 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.
1 _{The terms digital potentiometer and RDAC are used interchangeably.}
Rev. D
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