AD5235BRU250

非易失性内存，双通道1024位数字电位器 Nonvolatile Memory, Dual 1024 Position Digital Potentiometers

**GENERAL DESCRIPTION**

The AD5235 is a dual-channel, nonvolatile memory, digitally controlled potentiometer2 with 1024-step resolution, offering guaranteed maximum low resistor tolerance error of ±8%. The device performs the same electronic adjustment function as a mechanical potentiometer with enhanced resolution, solid state reliability, and superior low temperature coefficient performance. The versatile programming of the AD5235 via an SPI®-compatible serial interface allows 16 modes of operation and adjustment including scratchpad programming, memory storing and restoring, increment/decrement, ±6 dB/step log taper adjustment, wiper setting readback, and extra EEMEM for user defined information such as memory data for other components,

look-up table, or system identification information.

**FEATURES**

**Dual-channel, 1024-position resolution**

**25 kΩ, 250 kΩ nominal resistance**

**Maximum ±8% nominal resistor tolerance error**

**Low temperature coefficient: 35 ppm/°C**

**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**