Analog Devices Inc. AD5259BRMZ10

Overview

AD5259BRMZ10 from Analog Devices is a nonvolatile, I²C-compatible 256-position digital potentiometer in MSOP-10 package with 10 kΩ end-to-end resistance, 0.1% stored resistance tolerance, and −40°C to +125°C operating range. It replaces mechanical potentiometers in precision biasing and calibration circuits where EEPROM-retained wiper settings are required.

For engineers reviewing the AD5259BRMZ10 datasheet, AD5259BRMZ10 pinout, AD5259BRMZ10 application, or AD5259BRMZ10 equivalent, key selection criteria include I²C address configurability (AD0/AD1), VLOGIC voltage independence, <1 ms power-on EEPROM refresh, software write protection, and guaranteed 100-year data retention at 55°C.

Technical Context

The AD5259BRMZ10 implements a resistor ladder with 256 discrete tap points controlled via an I²C interface compliant with standard-mode (400 kHz) timing. Its dual-supply architecture separates logic-level signaling (VLOGIC = 2.7–5.5 V) from analog rail (VDD = 2.7–5.5 V), enabling mixed-voltage system integration without level shifters.

Wiper position is stored in on-chip EEPROM and automatically restored at power-up; factory-programmed tolerance (±0.1% accuracy) is read back via dedicated I²C commands. Address decoding via AD0/AD1 pins supports up to four devices on a single I²C bus without external hardware modification.

Key Specifications

Pinout & Package

AD5259BRMZ10 uses the compact MSOP-10 (3 mm × 4.9 mm × 1.1 mm) package with exposed pad not present (LFCSP variant has EPAD; MSOP does not). All pins are surface-mount, 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 AD5258BRMZ10, AD5259BRMZ10 eliminates boot-time uncertainty via EEPROM auto-restore; compared with MCP45HV51-103E/MS, it delivers traceable 0.1% resistance accuracy and mixed-voltage interoperability at the cost of lower voltage rating.

Availability

AD5259BRMZ10 is available at Aetrix Electronics and suitable for LCD panel calibration, programmable power supplies, RF bias networks, and automotive body electronics requiring stable component supply across extended temperature and long lifecycle programs.

Supply support for AD5259BRMZ10 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, headquartered in Wilmington, MA.

The AD5259BRMZ10 belongs to the AD525x family of nonvolatile digital potentiometers designed for precision calibration and adjustment in harsh-environment applications where mechanical potentiometers fail due to wear, vibration, or contamination.

FAQ

What is the maximum voltage that can be applied across terminals A and B of the AD5259BRMZ10?

The AD5259BRMZ10 supports a voltage range of GND − 0.3 V to VDD + 0.3 V across terminals A, B, and W. With VDD = 5.5 V, this permits up to 5.8 V differential voltage between A and B. Exceeding this violates Absolute Maximum Ratings and risks permanent damage to internal switches. The device does not support bipolar operation beyond these rails.

Does the AD5259BRMZ10 require external pull-up resistors on the I²C bus?

Yes, the AD5259BRMZ10 SDA and SCL pins are open-drain and require external pull-up resistors to VLOGIC. Typical values range from 1.8 kΩ (for 400 kHz operation with 200 pF bus capacitance) to 10 kΩ (for lower-speed or low-power operation). Pull-ups must connect to VLOGIC-not VDD-to ensure correct logic thresholds per the datasheet's VIH/VIL specifications.

How is resistance tolerance stored and accessed in the AD5259BRMZ10?

Resistance tolerance is factory-programmed into two EEPROM bytes (addresses 11110 and 11111) as sign-magnitude format: first byte holds sign + integer portion, second byte holds decimal portion (0.1% resolution). It is read via dedicated I²C commands (instruction bytes 0x7E and 0x7F) and used to calculate actual RAB for precision rheostat applications-enabling absolute resistance accuracy better than ±0.2% after calibration.

Can multiple AD5259BRMZ10 devices share the same I²C bus without address conflicts?

Yes, the AD5259BRMZ10 uses pins AD0 and AD1 to configure its 7-bit I²C address, supporting four unique addresses (0x30, 0x32, 0x4C, 0x4E). Each device must have a distinct AD0/AD1 combination hardwired before power-up; address latching occurs once at startup, so dynamic reconfiguration is not supported. No external address translators are needed.

What is the typical wiper resistance of the AD5259BRMZ10 and how does it affect zero-scale performance?

The AD5259BRMZ10 exhibits 75 Ω (min) to 350 Ω (max) total wiper resistance (RWB at code 0x00). This introduces a fixed offset in rheostat-mode zero-scale output, limiting minimum achievable resistance. For applications requiring sub-100 Ω on-resistance, external buffering or series compensation is necessary-especially critical in current-sense or low-voltage bias paths where RWB contributes measurable error.