Analog Devices Inc. AD5231BRUZ10-REEL7

Overview

AD5231BRUZ10-REEL7 from Analog Devices is a nonvolatile digital potentiometer with 1024-position resolution, 10 kΩ terminal resistance, SPI-compatible serial interface, and embedded EEPROM (EEMEM) for wiper setting retention across power cycles. It operates from 3 V to 5 V single supply or ±2.5 V dual supply and is used in precision gain/offset calibration loops requiring stable, field-programmable resistance.

For engineers reviewing the AD5231BRUZ10-REEL7 datasheet, AD5231BRUZ10-REEL7 pinout, AD5231BRUZ10-REEL7 application, or AD5231BRUZ10-REEL7 equivalent, key selection considerations include EEMEM restore time (140 µs), monotonic 10-bit operation, ±6 dB/step log taper support, wiper readback capability, and TSSOP-16 package compatibility with industrial temperature range (−40°C to +85°C).

Technical Context

The AD5231BRUZ10-REEL7 implements a 10-bit RDAC architecture with scratchpad register and separate 28-byte EEMEM for user data storage. Its SPI interface supports CPHA = 0/1 and CPOL = 0/1 modes, enabling interoperability with ADuC8xx, MC68HC11, and similar microcontrollers.

It features hardware PR (preset) and WP (write protect) pins, open-drain SDO/RDY outputs requiring external pull-ups, and dual-supply operation enabling ground-referenced bipolar signal adjustment. Terminal voltage compliance is bounded by VSS and VDD, with internal clamping diodes protecting A/B/W terminals.

Key Specifications

Pinout & Package

AD5231BRUZ10-REEL7 is housed in a 16-lead TSSOP package (4.4 mm × 5.0 mm, 0.65 mm pitch), rated for −40°C to +85°C operation and compatible with standard reflow profiles (peak 260°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5232BRUZ10-REEL7, the AD5231BRUZ10-REEL7 reduces component count and layout area for single-channel designs, while compared with MCP42010-I/ST, it adds essential nonvolatility and 4× finer resolution-critical for calibration-critical instrumentation.

Availability

AD5231BRUZ10-REEL7 is available at Aetrix Electronics and suitable for instrumentation calibration, programmable power supplies, sensor signal conditioning, and programmable filter tuning requiring stable component supply and long-term parameter retention.

Supply support for AD5231BRUZ10-REEL7 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.

The AD5231 belongs to Analog Devices' precision digital potentiometer product line, engineered specifically for replacing mechanical trimmers in industrial, medical, and test equipment where long-term stability, programmability, and nonvolatile configuration are mandatory.

FAQ

What is the terminal resistance tolerance of the AD5231BRUZ10-REEL7?

The AD5231BRUZ10-REEL7 has a nominal terminal resistance of 10 kΩ with a tolerance of −40% to +20%, as specified in Table 1 of the Rev. E datasheet. This tolerance applies to the A–B resistance at full-scale code (0x3FF) and must be accounted for in precision divider designs where absolute resistance accuracy impacts system gain error.

Does the AD5231BRUZ10-REEL7 support dual-supply operation?

Yes, the AD5231BRUZ10-REEL7 supports dual-supply operation from ±2.25 V to ±2.75 V. This enables true bipolar signal adjustment-such as ground-referenced AC coupling-with VA, VB, and VW operating between VSS and VDD. The internal level-shifter ensures digital logic remains functional regardless of analog terminal common-mode voltage.

How does the PR pin function on the AD5231BRUZ10-REEL7?

The PR (Preset) pin on the AD5231BRUZ10-REEL7 is an active-high hardware override that, on its rising edge, reloads the RDAC register with the current EEMEM value in 70 µs. It provides deterministic, glitch-free wiper restoration independent of SPI traffic-critical for safety-critical recalibration during fault recovery sequences in the AD5231BRUZ10-REEL7.

Can the AD5231BRUZ10-REEL7 be used as a DAC replacement?

Yes, the AD5231BRUZ10-REEL7 can replace low-resolution DACs in unipolar or bipolar configurations. In voltage-divider mode with VA = VDD and VB = 0 V, it delivers 10-bit monotonic output at VW with ±0.4 LSB INL. Its 370 kHz bandwidth and 0.045% THD make it suitable for DC and low-frequency AC applications-not high-speed waveform generation.

What is the maximum current rating for the A, B, and W terminals of the AD5231BRUZ10-REEL7?

The AD5231BRUZ10-REEL7 supports ±2 mA continuous current and ±20 mA intermittent current through any A–B, A–W, or B–W path, as defined in Absolute Maximum Ratings (Table 3). Exceeding these limits risks switch degradation or thermal damage; design must ensure I²R heating stays within package power dissipation limits (0.05 mW typical).