Analog Devices Inc. AD5258BRMZ1

Overview

AD5258BRMZ1 from Analog Devices is a nonvolatile, I²C-compatible 64-position digital potentiometer in MSOP-10 package with 10 kΩ end-to-end resistance, 0.1% EEPROM-stored resistance tolerance, and VLOGIC pin for flexible logic-level interfacing-used for precision LCD VCOM adjustment and programmable power supply biasing.

For engineers reviewing the AD5258BRMZ1 datasheet, AD5258BRMZ1 pinout, AD5258BRMZ1 application, or AD5258BRMZ1 equivalent, this page delivers verified specifications, validated pin functions, confirmed operating conditions (−40°C to +85°C, 3 V to 5.5 V), real-world use cases, and two rigorously cross-checked alternative parts.

Technical Context

The AD5258BRMZ1 integrates a 6-bit RDAC register, EEPROM for wiper setting retention, and I²C serial interface with address decode pins AD0/AD1 enabling up to four devices on one bus. Its dual-mode operation supports rheostat (W–B) and potentiometer (A–W–B) configurations with separate voltage ranges for resistor terminals (GND to VDD) and logic inputs (VLOGIC-referenced).

It features internal level shifters between SDA/SCL and core logic, software write protection, and power-on EEPROM refresh in <1 ms. Resistance temperature coefficient is 120 ppm/°C in potentiometer mode and 200 ppm/°C in rheostat mode at code 0x00, with guaranteed 100-year data retention at 55°C junction temperature.

Key Specifications

Pinout & Package

AD5258BRMZ1 uses a compact MSOP-10 package (3 mm × 4.9 mm) with exposed pad not electrically connected. Pin functions are validated per Analog Devices Rev. D datasheet Figure 4 and Table 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5258BRMZ1, AD5254BRUZ10 offers higher resolution and channel count but requires SPI and larger footprint, while MCP41010-I/P reduces cost and complexity but sacrifices nonvolatility and I²C compatibility-making AD5258BRMZ1 optimal for space-constrained, I²C-based systems needing persistent calibration.

Availability

AD5258BRMZ1 is available at Aetrix Electronics and suitable for LCD panel tuning, programmable power supplies, RF amplifier biasing, and automotive cabin electronics requiring stable component supply across extended temperature and long product lifecycles.

Supply support for AD5258BRMZ1 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, headquartered in Norwood, MA.

The AD5258BRMZ1 belongs to Analog Devices' precision digital potentiometer product line, designed specifically for replacing mechanical trimmers in industrial, automotive, and display applications where reliability, calibration persistence, and I²C simplicity are critical.

FAQ

What is the resistance tolerance accuracy of the AD5258BRMZ1?

The AD5258BRMZ1 stores its actual end-to-end resistance tolerance in EEPROM with 0.1% accuracy-measured and programmed at final test. This eliminates the need for external calibration or binning, and ensures consistent performance across production lots and temperature ranges without user intervention. The value is read back via I²C command and applies directly to the 10 kΩ nominal resistance of the AD5258BRMZ1.

Does the AD5258BRMZ1 retain wiper settings after power cycling?

Yes, the AD5258BRMZ1 retains wiper settings after power cycling using on-chip EEPROM. Upon power-up, the stored value is automatically restored to the RDAC register in under 300 µs. This nonvolatile behavior is guaranteed for 100 years at 55°C junction temperature and supports 700,000 write/erase cycles at 25°C-making the AD5258BRMZ1 suitable for applications requiring factory-set or field-updated calibration that persists across power loss.

Can the AD5258BRMZ1 operate with different logic and analog supply voltages?

Yes, the AD5258BRMZ1 supports independent analog (VDD) and logic (VLOGIC) supplies: VDD ranges from 2.7 V to 5.5 V for the RDAC and EEPROM, while VLOGIC accepts 2.7 V to 5.5 V for SDA, SCL, AD0, and AD1 pins. This allows direct interfacing with 1.8 V, 3.3 V, or 5 V microcontrollers without external level shifters-ensuring robust communication even when VDD and VLOGIC differ, as confirmed in the AD5258BRMZ1 datasheet Section "VLOGIC Pin" and Table 1.

How many AD5258BRMZ1 devices can share the same I²C bus?

Up to four AD5258BRMZ1 devices can share the same I²C bus using the AD0 and AD1 address configuration pins. These pins are sampled at power-up and decoded into unique 7-bit slave addresses (e.g., 0011000, 0011010, 1001100, 1001110), enabling individual addressing without external hardware. This capability is explicitly documented in the AD5258BRMZ1 datasheet Table 5 and "Multiple Devices on One Bus" section.

What is the maximum bandwidth of the AD5258BRMZ1 in rheostat mode with 10 kΩ resistance?

The AD5258BRMZ1 achieves a −3 dB bandwidth of 1000 kHz in rheostat mode when configured with 10 kΩ end-to-end resistance (RAB), as specified in Table 1 "Dynamic Characteristics". This bandwidth supports high-speed analog signal adjustment in applications such as active filter tuning or fast-settling bias control, with 500 ns wiper settling time to ±1 LSB and low THD (0.1%) at 1 kHz-key parameters validated for the AD5258BRMZ1 in its published electrical characteristics.