Single-Channel, 1024-Position, Digital Rheostat
with I2C Interface and 50-TP Memory
Single-channel, 1024-position resolution
10 kΩ nominal resistance
50-times programmable (50-TP) wiper memory
Rheostat mode temperature coefficient: 35 ppm/°C
2.7 V to 5.5 V single-supply operation
±2.5 V to ±2.75 V dual-supply operation for ac or bipolar
Wiper setting and memory readback
Power on refreshed from memory
Resistor tolerance stored in memory
Thin LFCSP, 10-lead, 3 mm × 3 mm × 0.8 mm package
Compact MSOP, 10-lead 3 mm × 4.9 mm × 1.1 mm package
Mechanical rheostat replacements
Op-amp: variable gain control
Instrumentation: gain, offset adjustment
Programmable voltage to current conversions
Programmable filters, delays, time constants
Programmable power supply
FUNCTIONAL BLOCK DIAGRAM
The AD5175 is a single-channel, 1024-position digital rheostat
that combines industry leading variable resistor performance
with nonvolatile memory (NVM) in a compact package.
This device supports both dual-supply operation at ±2.5 V to
±2.75 V and single-supply operation at 2.7 V to 5.5 V, and offers
50-times programmable (50-TP) memory.
The AD5175 device wiper settings are controllable through the
I2C–compatible digital interface. Unlimited adjustments are
allowed before programming the resistance value into the
50-TP memory. The AD5175 does not require any external
voltage supply to facilitate fuse blow and there are 50 oppor-
tunities for permanent programming. During 50-TP activation,
a permanent blow fuse command freezes the resistance position
(analogous to placing epoxy on a mechanical rheostat).
The AD5175 is available in a 3 mm × 3mm 10-lead LFCSP
package and in a 10-lead MSOP package. The part is guaranteed
to operate over the extended industrial temperature range of
−40°C to +125°C.
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rights of third parties that may result from its use. Specifications subject to change without notice. No
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