AD5203ARUZ100

Overview

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

Feature Summary

• Quad-channel architecture providing four independent 6-bit (64-position) digitally controlled variable resistors.
• 100 kΩ nominal end-to-end resistance with ±30% tolerance and 700 ppm/°C temperature coefficient.
• 3-wire serial interface supporting clock rates up to 10 MHz with daisy-chain capability via SDO pin.
• Active-low SHDN pin enables microwatt power shutdown by opening Terminal A and shorting Wiper to Terminal 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 suffix '100' confirms the 100 kΩ resistance value, as the 'U' indicates the TSSOP-24 package. Confirm that the component requires external ESD precautions due to sensitivity. Ensure the design accounts for the volatile nature of the latches, which retain settings only during active operation or shutdown modes.

Selection Notes

Select this model when four independent high-resistance (100 kΩ) channels are required in a compact surface-mount footprint. Consider the 700 ppm/°C temperature coefficient for thermal stability requirements. For higher resolution needs, evaluate the 256-position AD8403. Ensure the application supports the 3-wire serial protocol and provides adequate pull-up for the open-drain SDO output if daisy-chaining.

Part Context

The AD5203 series replaces multiple mechanical potentiometers with a single integrated circuit. The ARUZ100 variant specifically denotes the industrial temperature range (-40°C to +85°C), the wide body SOIC/TSSOP package options, and the 100 kΩ resistance value. It is part of Analog Devices' portfolio for programmable analog signal conditioning.

Replacement Considerations

Public confirmed substitute part numbers: None listed in source material. Note that the AD8403 offers pin compatibility with 256-position resolution but differs in bit depth.