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AD5272
1024-Position, 1% Resistor Tolerance Error, Single Channel I2C Interface and 50-TP Memory Digital Rheostat
Overview
Features and Benefits
- Single-channel, 1024-/256-position resolution
- 20 kΩ, 50 kΩ, 100 kΩ nominal resistance
- Maximum ±1% nominal resistor tolerance error
- 50-times programmable (50-TP) wiper memory
- Rheostat mode temperature coefficient: 5 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 operations
- I2C-compatible interface
- Wiper setting readback
- Power on refreshed from 50-TP 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
Product Details
The AD5272 / AD5274 are single-channel, 1024-/256-position digital rheostats that combine industry leading variable resistor performance with nonvolatile memory (NVM) in a compact package.
The AD5272 / AD5274 ensure less than 1% end-to-end resistor tolerance error and offer 50-times programmable (50-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 AD5272 / AD5274 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 AD5272 / AD5274 do not require any external voltage supply to facilitate fuse blow and there are 50 opportunities for permanent programming. During 50-TP activation, a permanent blow fuse command freezes the wiper position (analogous to placing epoxy on a mechanical trimmer).
The AD5272 / AD5274 are available in a 3 mm × 3 mm 10-lead LFCSP package and in a 10-lead MSOP package. The parts are guaranteed to operate over the extended industrial temperature range of −40°C to +125°C.
APPLICATIONS
- 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
- Sensor calibration
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Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation
Application Notes (2)
Frequently Asked Questions (1)
Software & Systems Requirements
Device Drivers
Tools & Simulations
IBIS Models
Reference Materials
Product Selection Guide (1)
Rarely Asked Questions (28)
Design Resources
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PCN-PDN Information
Sample & Buy
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