Description

Quad 256-Position I2C Nonvolatile Memory, Digital Potentiometer Features: Quad 256-position resolution 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ Nonvolatile memory stores wiper settings w/write protection Power-on refreshed to EEMEM settings in 300 μs typ EEMEM rewrite time = 540 μs typ Resistance tolerance stored in nonvolatile memory 12 extra bytes in EEMEM for user-defined information I2C-compatible serial interface Direct read/write access of RDAC and EEMEM registers Predefined linear increment/decrement commands Predefined ±6 dB step change commands Synchronous or asynchronous quad-channel update Wiper setting readback 4 MHz bandwidth—1 kΩ version Single supply 2.7 V to 5.5 V Dual supply ±2.25 V to ±2.75 V 2 slave address-decoding bits allow operation of 4 devices 100-year typical data retention, TA = 55°C Operating temperature: –40°C to +105°C