AD5203ARZ10

Overview

The AD5203ARZ10 is a quad-channel, 64-position digital potentiometer from Analog Devices Inc., housed in a 24-lead SOIC package. It operates on a single +2.7 V to +5.5 V supply and features a 10 kΩ nominal resistance with a ±30% tolerance. The device utilizes a 3-wire SPI-compatible serial interface for data loading at rates up to 10 MHz. Key electrical parameters include a wiper resistance of 45 Ω to 100 Ω, a temperature coefficient of 700 ppm/°C, and a shutdown current of less than 5 mA. It supports midscale preset via the RS pin and power shutdown via the SHDN pin.

Feature Summary

• Quad-channel architecture providing four independent 6-bit variable resistors
• 3-wire SPI-compatible serial interface with daisy-chain capability via SDO
• Power shutdown mode reduces current consumption to under 5 mA
• Midscale preset function accessible through the dedicated RS pin

Applications

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

Procurement Notes

Verify the specific suffix '10' confirms the 10 kΩ resistance value against the manufacturer's ordering guide. Confirm the 'R' designation corresponds to the wide-body SOIC package variant. Ensure compatibility with the required -40°C to +85°C industrial temperature range for the target environment.

Selection Notes

Select this component when four independent digitally controlled resistors are required in a single package. The 64-position resolution (6 bits) suits applications not requiring high precision. Consider the 100 kΩ variant if higher impedance levels are needed, or the AD8403 if 256-position resolution is necessary for finer control.

Part Context

The AD5203 belongs to the AD520x family of digital potentiometers. It serves as a direct electronic replacement for mechanical pots. Higher resolution alternatives in the same form factor include the AD8403, which offers 256 positions. The device integrates ESD protection on digital inputs and maintains latch settings during power-down cycles.

Replacement Considerations

Public confirmed substitute part numbers: AD5203ARZ100 (100 kΩ version).

FAQ

How does the AD5203 handle data persistence after power loss?

The device retains the programmed resistance values in its internal latches during power shutdown. Upon returning to operational mode, the wipers resume their previous resistance settings.

What is the function of the SDO pin?

The Serial Data Output (SDO) pin allows for daisy-chaining multiple devices. It shifts out the previously entered bit to facilitate data transfer to subsequent components without additional decoding logic.

How is the midscale position achieved?

Asserting the active-low Reset (RS) pin forces all RDAC latches to load the hexadecimal value 20H, positioning the wipers at the midscale point of the resistor ladder.