Analog Devices Inc. AD5203ARUZ10

Overview

AD5203ARUZ10 from Analog Devices is a quad-channel, 64-position digital potentiometer in TSSOP-24 package with 10 kΩ end-to-end resistance, ±1% channel-to-channel matching, 700 ppm/°C temperature coefficient, and 3-wire SPI-compatible serial interface operating from +2.7 V to +5.5 V. It replaces four mechanical potentiometers in programmable gain amplifiers and line impedance matching circuits.

For engineers reviewing the AD5203ARUZ10 datasheet, AD5203ARUZ10 pinout, AD5203ARUZ10 application, or AD5203ARUZ10 equivalent, key selection criteria include guaranteed monotonicity (±0.1 LSB DNL), midscale preset via RS pin, microwatt shutdown mode (<5 µA), daisy-chainable SDO output, and industrial temperature range (–40°C to +85°C).

Technical Context

The AD5203ARUZ10 implements four independent 6-bit resistor ladders, each decoded by A1/A0 address bits in an 8-bit serial word (2 addr + 6 data). Each channel features a dedicated latch holding wiper position, updated via internal shift register clocked at up to 10 MHz.

It supports both rheostat (A–W or B–W) and potentiometer divider (A–W–B) configurations. In divider mode, voltage output exhibits 20 ppm/°C tempco due to ratiometric operation; in rheostat mode, absolute resistance drifts at 700 ppm/°C. Shutdown disconnects all A terminals and shorts W to B, reducing supply current to <5 µA.

Key Specifications

Pinout & Package

TSSOP-24 (RU-24) package: 0.65 mm pitch, 4.4 mm × 7.8 mm body, 1.1 mm max height, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital potentiometer applications.

Compared with AD5203ARUZ100 and AD8403ARUZ10, the AD5203ARUZ10 offers optimal balance of speed (600 kHz BW), low wiper resistance (45 Ω), and cost-effective 64-step control - making it preferred for general-purpose programmable resistive functions where fine resolution is unnecessary.

Availability

AD5203ARUZ10 is available at Aetrix Electronics and suitable for programmable gain amplifiers, line impedance matching, volume control, panning, and power supply adjustment requiring stable component supply across industrial temperature ranges.

Supply support for AD5203ARUZ10 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and consumer markets since 1965.

The AD5203ARUZ10 belongs to Analog Devices' precision digital potentiometer product line, designed specifically for replacing mechanical trimmers in automated calibration, sensor conditioning, and programmable analog front-ends.

FAQ

What is the maximum clock frequency supported by the AD5203ARUZ10 serial interface?

The AD5203ARUZ10 supports a maximum serial clock frequency of 10 MHz, enabling full 4-channel updates in under 3.2 µs. This timing assumes clean signal edges and proper setup/hold times (tDS ≥ 5 ns, tDH ≥ 5 ns). At 10 MHz, the AD5203ARUZ10 achieves the fastest possible configuration cycle for its 64-position resolution while maintaining reliable data capture across the industrial temperature range.

Does the AD5203ARUZ10 retain wiper settings during shutdown?

Yes, the AD5203ARUZ10 retains all wiper position settings in its internal latches during shutdown. When SHDN is asserted (logic low), the device opens all A terminals and shorts each W to its corresponding B terminal, but the programmed 6-bit codes remain stored. Upon returning SHDN to logic high, the wipers immediately resume their pre-shutdown resistance values without requiring reinitialization.

Can the AD5203ARUZ10 be used in a 3.3 V system?

Yes, the AD5203ARUZ10 operates from +2.7 V to +5.5 V, making it fully compatible with 3.3 V systems. Its digital inputs accept VIH ≥ 2.1 V (at VDD = +3 V) and VIL ≤ 0.6 V, and supply current remains below 4 mA in TTL mode. The 10 kΩ version maintains specified performance including 600 kHz bandwidth and <0.003% THD+N at 3.3 V operation.

How does the AD5203ARUZ10 handle channel-to-channel crosstalk?

The AD5203ARUZ10 achieves <–65 dB crosstalk at 100 kHz by incorporating four dedicated analog ground pins (AGND1–AGND4) positioned between adjacent A/W/B terminals. To realize this spec, all AGND pins must be connected to the same low-impedance ground plane as DGND. Failure to tie AGNDs properly degrades isolation and increases inter-channel interference in sensitive analog signal paths.

Is the AD5203ARUZ10 pin-compatible with other packages in the same family?

No, the AD5203ARUZ10 (TSSOP-24) is not pin-compatible with AD5203AN10 (PDIP-24) or AD5203AR10 (SOIC-24), despite sharing identical functionality and pin functions. Pin numbering differs across packages - for example, VDD is pin 16 in TSSOP but pin 12 in SOIC. PCB layout must match the RU-24 footprint; migration requires board redesign.