AD5203ARU100

Overview

The AD5203ARU100 is a quad-channel, 64-position digital potentiometer manufactured by Analog Devices Inc. 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 input. Each channel includes a volatile latch that retains settings during power shutdown. The component is housed in a compact 24-lead Thin Shrink Small Outline Package (TSSOP) and is rated for operation within the extended industrial temperature range of –40°C to +85°C.

Feature Summary

• Quad-channel architecture providing four independent 100 kΩ variable resistors
• 6-bit resolution offering 64 discrete tap positions per channel
• 3-wire SPI-compatible serial interface supporting daisy-chaining via SDO pin
• Power shutdown mode reduces current consumption to less than 5 mA

Applications

• Mechanical potentiometer replacement in embedded systems
• Programmable filters, delays, and time constant adjustments
• Volume control and audio panning circuits
• Line impedance matching applications
• Power supply voltage adjustment

Procurement Notes

Verify the specific suffix ARU100 confirms the 100 kΩ resistance value and TSSOP-24 package type. Confirm availability status as older revisions may be discontinued or replaced by updated variants. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS input structures.

Selection Notes

Select this model when a 100 kΩ end-to-end resistance is required rather than the 10 kΩ variant. The TSSOP-24 package is suitable for space-constrained surface-mount designs. Consider the 700 ppm/°C temperature coefficient for thermal stability requirements. Verify that the 6-bit resolution meets the precision needs of the target application.

Part Context

This component belongs to the AD5203 family of digital potentiometers. It serves as a solid-state alternative to mechanical pots, offering programmability and durability. Higher resolution options within the same ecosystem include the AD8403, which provides 256 positions instead of 64.

Replacement Considerations

For higher resolution requirements, consider the AD8403 series which offers 256 positions. For lower resistance values, the AD5203ARU10 provides the same package and functionality with a 10 kΩ nominal resistance.