DESCRIPTION

· The AD5235 is a dual-channel, nonvolatile memory, digitally controlled potentiometer with 1024-step resolution.

· It offers a guaranteed maximum low resistor tolerance error of ±8%.

· The device performs electronic adjustment functions similar to a mechanical potentiometer with enhanced resolution, solid-state reliability, and superior low temperature coefficient performance.

· It features versatile programming via an SPI-compatible serial interface with 16 modes of operation.

· The AD5235 is available in a 16-lead TSSOP package and operates over the extended industrial temperature range of −40°C to +85°C.

FEATURES

· Dual-channel, 1024-position resolution.

· Nominal resistance options: 25 kΩ, 250 kΩ.

· Maximum ±8% nominal resistor tolerance error.

· Low temperature coefficient: 35 ppm/°C.

· Operates with 2.7 V to 5 V single supply or ±2.5 V dual supply.

· SPI-compatible serial interface.

· Nonvolatile memory stores wiper settings.

· Power-on refreshed with EEMEM settings.

· Permanent memory write protection.

· Resistance tolerance stored in EEMEM.

· 26 bytes extra nonvolatile memory for user-defined information.

· 1M programming cycles.

· 100-year typical data retention.

APPLICATIONS

· DWDM laser diode driver, optical supervisory systems.

· Mechanical potentiometer replacement.

· Instrumentation: gain, offset adjustment.

· Programmable voltage-to-current conversion.

· Programmable filters, delays, time constants.

· Programmable power supply.

· Low resolution DAC replacement.

· Sensor calibration.