Analog Devices Inc. AD5144BRUZ10

Overview

AD5144BRUZ10 from Analog Devices is a quad-channel, 256-position, nonvolatile digital potentiometer with I²C/SPI interface, 10 kΩ nominal resistance, ±8% resistor tolerance, and 35 ppm/°C temperature coefficient. It operates from −40°C to +125°C and supports single- or dual-supply configurations for precision analog gain/offset adjustment in programmable power supplies and LCD brightness control.

For engineers reviewing the AD5144BRUZ10 datasheet, AD5144BRUZ10 pinout, AD5144BRUZ10 application, or AD5144BRUZ10 equivalent, this page delivers verified specifications, validated TSSOP-20 pin functions, confirmed EEPROM retention (50 years), real-world wiper current limits (±6 mA), and two rigorously cross-checked alternative parts for design continuity.

Technical Context

The AD5144BRUZ10 implements four independent 256-step RDACs with nonvolatile EEPROM storage per channel, enabling power-up wiper position restoration without external memory. Its linear gain setting mode allows independent programming of RAW and RWB resistances for precise resistor matching across channels.

It supports both SPI (CPOL=0/1, CPHA=0/1) and I²C (Standard/Fast mode) interfaces on shared pins, with dedicated SYNC (SPI) or RESET/ADDR (I²C) pins depending on configuration. The device features dual supply capability (±2.25 V to ±2.75 V), independent logic supply (1.8 V to 5.5 V), and guaranteed monotonicity in potentiometer divider mode.

Key Specifications

Pinout & Package

AD5144BRUZ10 is packaged in a 20-lead TSSOP (4.4 mm × 6.5 mm, 0.65 mm pitch) with exposed pad. Pin functions are defined for SPI interface mode per datasheet Figure 9 and Table 10.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5144BRUZ10, AD5142BRUZ10 offers half the channel count but identical resolution and nonvolatility, while MAX5487ETE+ eliminates EEPROM to reduce cost and complexity at the expense of power-loss resilience.

Availability

AD5144BRUZ10 is available at Aetrix Electronics and suitable for programmable power supplies, LCD panel controls, portable audio systems, and sensor signal conditioning requiring stable component supply and guaranteed industrial temperature operation.

Supply support for AD5144BRUZ10 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, automotive, communications, and healthcare markets.

The AD51xx family delivers precision, nonvolatile digital potentiometers optimized for closed-loop calibration, programmable gain/offset, and reconfigurable analog signal paths in harsh environments.

FAQ

What is the maximum wiper current rating for AD5144BRUZ10?

The AD5144BRUZ10 supports ±6 mA continuous wiper current when configured with 10 kΩ resistance. This rating applies to all four RDAC channels simultaneously and is valid across the full operating temperature range (−40°C to +125°C). Exceeding this limit risks switch degradation or resistance drift. The AD5144BRUZ10 datasheet specifies that maximum current is bounded by both switch capability and terminal voltage range (VSS to VDD).

Does AD5144BRUZ10 retain its wiper settings after power cycling?

Yes, AD5144BRUZ10 retains wiper settings after power cycling due to on-chip EEPROM storage per channel. Each RDAC's position is automatically restored at power-up unless overridden by a new command. The EEPROM guarantees 50 years of data retention after 1000 write cycles and 100,000 endurance cycles, making AD5144BRUZ10 suitable for applications requiring fail-safe configuration persistence.

Can AD5144BRUZ10 operate with separate analog and digital supply voltages?

Yes, AD5144BRUZ10 supports independent analog (VDD/VSS) and digital (VLOGIC) supplies. VLOGIC ranges from 1.8 V to 5.5 V and can differ from VDD, enabling interfacing with low-voltage MCUs while driving higher-voltage analog circuits. This separation minimizes digital noise coupling into sensitive analog nodes - a key design advantage confirmed in the AD5144BRUZ10 functional description and electrical characteristics tables.

What package type is used for AD5144BRUZ10?

AD5144BRUZ10 uses a 20-lead TSSOP package (4.4 mm × 6.5 mm, 0.65 mm pitch) with exposed thermal pad. This package is explicitly listed in the AD5144 family ordering guide and pin configuration diagrams for SPI-interface variants. It differs from the 24-lead LFCSP option used in AD5144BCPZ variants, and pin functions align with Table 10 in the Rev. E datasheet.

Is AD5144BRUZ10 compatible with both SPI and I²C protocols?

AD5144BRUZ10 supports both SPI and I²C interfaces, but not simultaneously on the same device variant. The BRUZ10 suffix denotes the TSSOP package with SPI interface (SYNC, SCLK, SDI, SDO pins). I²C functionality is implemented in the AD5144A variant (e.g., AD5144ABRUZ), which substitutes RESET, SCL, SDA, and ADDR pins. Therefore, AD5144BRUZ10 is SPI-only; I²C compatibility requires selecting the AD5144A part number.