AD5204BN50

Overview

The AD5204BN50 is a four-channel, 256-position digitally controlled variable resistor from Analog Devices. It features a nominal terminal resistance of 50 kΩ with a temperature coefficient of 700 ppm/°C. The device operates on a single supply of +2.7 V to +5.5 V or dual supplies of ±2.3 V to ±2.7 V. It utilizes a 3-wire SPI-compatible serial interface for programming. Each channel includes an independent latch holding the resistance value. The part is housed in a 24-lead TSSOP package and functions over an industrial temperature range of −40°C to +85°C.

Feature Summary

• Four independently programmable channels with 256 tap positions
• Nominal 50 kΩ end-to-end resistance with linear taper
• 3-wire SPI-compatible serial interface with daisy-chain capability via SDO pin
• Power-on midscale preset and hardware reset (PR) pin functionality

Applications

• Mechanical potentiometer replacement in embedded systems
• Instrumentation gain and offset adjustment circuits
• Programmable voltage-to-current conversion stages
• Line impedance matching networks

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current data sheet to confirm package type and resistance tolerance. The BN suffix indicates a 24-lead PDIP package variant; however, standard availability often favors surface-mount options like BRUZ. Confirm lead-free status and RoHS compliance requirements prior to procurement to ensure alignment with assembly specifications.

Selection Notes

Select this component when a multi-channel digital solution is required without non-volatile memory storage. The volatile nature of the latches necessitates reprogramming after power cycles unless a hardware reset is utilized. Ensure the system logic levels match the specified VIH and VIL thresholds for the chosen supply voltage. Consider thermal dissipation limits if operating near maximum current ratings across the 50 kΩ terminals.

Part Context

This part belongs to the AD5204 family of 4-channel digital potentiometers. It shares architectural similarities with the AD5206 (6-channel) and AD5202/AD5203 (1/2-channel) variants. The primary distinction lies in the channel count and specific resistance codes, where the '50' suffix denotes the 50 kΩ nominal value. It serves as a direct electronic substitute for mechanical multi-gang potentiometers in precision analog control applications.

Replacement Considerations

Direct functional replacements include the AD5204BRZ50 for surface-mount TSSOP applications or the AD5204CPZ50 for commercial grade operation. For higher resolution needs, consider the AD5252 series which offers 1024 positions. Verify that the replacement package matches the PCB footprint and thermal requirements of the existing design.