AD5270BRMZ-20

AD5270 is a single-channel, digital rheostat. It combine industry leading variable resistor performance with non-volatile memory (NVM) in a compact package. It ensures less than 1% end-to-end resistor tolerance error and offer 50-times programmable (50-TP) memory. The wiper settings are controllable through the SPI digital interface. Unlimited adjustments are allowed before programming the resistance value into the 50-TP memory. It doesn't 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 resistance position (analogous to placing epoxy on a mechanical trimmer). It is widely used in application such as 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 etc.

• Nominal resistance is 20Kohm
• Resolution is 1,024bits
• Rheostat mode temperature coefficient is 5ppm/°C
• SPI-compatible interface, resistor noise density is 13nV/√Hz at RAW = 20Kohm
• Wiper setting readback, total harmonic distortion is −90dB at RAW = 20Kohm
• Single-supply operation is 2.7V to 5.5V
• Dual-supply operation for ac or bipolar operation is ±2.5V to ±2.75V
• Bandwidth is 300kHz typ at RAW = 20Kohm
• Operating temperature range is -40°C to +125°C
• Packaging style is 10-lead MSOP

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