AD5203ARUZ100-REEL

Overview

The AD5203ARUZ100-REEL is a quad-channel, 64-position digital potentiometer from Analog Devices. It integrates four independent variable resistors in a TSSOP-24 package with a nominal resistance of 100 kΩ. The device operates on a single +2.7 V to +5.5 V supply and features a 3-wire SPI-compatible serial interface for data loading at rates up to 10 MHz. Each channel includes a volatile latch that retains settings during shutdown mode. Key electrical parameters include a temperature coefficient of 700 ppm/°C, wiper resistance of 45–100 Ω, and a power shutdown current of less than 5 mA.

Feature Summary

• Quad-channel architecture providing four independent 6-bit digitally controlled variable resistors
• 100 kΩ nominal end-to-end resistance with linear taper
• 3-wire SPI-compatible serial interface supporting daisy-chaining via SDO pin
• Power shutdown mode (SHDN) isolates terminals A and shorts wiper to B

Applications

• Mechanical potentiometer replacement in space-constrained designs
• Programmable filters, delays, and time constant adjustments
• Volume control and panning in audio circuits
• Line impedance matching and power supply voltage adjustment

Procurement Notes

Verify the specific ordering suffix '-REEL' confirms tape and reel packaging rather than tube or cut tape. Confirm the 'ARU' designation corresponds to the TSSOP-24 package and the '100' indicates the 100 kΩ resistance value. Ensure compatibility with the -40°C to +85°C industrial temperature range specified for this variant.

Selection Notes

Select this component when four independent variable resistors are required in a compact surface-mount package. The 100 kΩ value suits applications requiring higher impedance levels compared to the 10 kΩ variant. Note that the device uses volatile memory; if non-volatile retention across power cycles is needed, consider the AD512x series instead. The 6-bit resolution provides 64 tap positions suitable for general-purpose adjustment.

Part Context

This part belongs to the AD5203 family of quad-channel digital potentiometers. It serves as a lower-resolution alternative to the AD8403, which offers 256 positions (8-bit). The AD5203 is designed to replace mechanical pots in systems where digital control of resistance ratios is necessary without the complexity of DACs.

Replacement Considerations

For direct pin-compatible upgrades requiring higher resolution, the AD8403 series is the documented substitute. For non-volatile functionality, the AD512x series may be considered, though pinouts and interfaces differ.