Analog Devices Inc. AD5124BRUZ100-RL7

Overview

AD5124BRUZ100-RL7 from Analog Devices is a quad-channel, 128-position, nonvolatile digital potentiometer with I²C/SPI interface, 100 kΩ end-to-end 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 bias control.

For engineers reviewing the AD5124BRUZ100-RL7 datasheet, AD5124BRUZ100-RL7 pinout, AD5124BRUZ100-RL7 application, or AD5124BRUZ100-RL7 equivalent, this device delivers verified 128-step resolution, EEPROM-persistent wiper settings, fast 75 µs start-up, and guaranteed 50-year data retention - critical for industrial embedded systems requiring long-term calibration stability without recalibration.

Technical Context

The AD5124BRUZ100-RL7 implements four independent RDAC channels in a single IC, each configurable as either a rheostat (two-terminal) or potentiometer (three-terminal) with linear gain setting mode enabling precise resistor matching between channels. Its architecture integrates SPI/I²C-compatible serial interface, EEPROM-backed wiper registers, and independent logic supply (1.8 V to 5.5 V) decoupled from analog rails.

It supports dual-supply operation (±2.25 V to ±2.75 V), enabling bipolar signal adjustment with ground-referenced terminals, and features low wiper resistance (≤230 Ω at zero scale for 100 kΩ version), 3 MHz bandwidth, and −90 dB THD at 1 kHz - making it suitable for AC-coupled filter tuning and audio-level control where distortion and settling time matter.

Key Specifications

Pinout & Package

AD5124BRUZ100-RL7 is housed in a 20-lead TSSOP package (4.4 mm × 6.5 mm, 0.65 mm pitch), optimized for high-density PCB layouts and industrial thermal cycling. Pin functions are defined for SPI interface configuration per Analog Devices Rev. E 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 AD5124BRUZ100-RL7, AD5144BRUZ100-RL7 offers higher resolution at identical footprint and interface compatibility, while MCP45HV51-104E/ST trades nonvolatility for lower unit cost and simpler SPI-only control - making AD5124BRUZ100-RL7 optimal for calibration-critical, field-deployed systems.

Availability

AD5124BRUZ100-RL7 is available at Aetrix Electronics and suitable for programmable power supplies, LCD panel biasing, industrial sensor conditioning, and embedded audio level control requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for AD5124BRUZ100-RL7 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 with precision components.

The AD5124 series belongs to Analog Devices' precision digital potentiometer product line, designed specifically for nonvolatile, temperature-stable resistance adjustment in calibration-critical analog signal chains and programmable power systems.

FAQ

What is the resistance tolerance and temperature coefficient of the AD5124BRUZ100-RL7?

The AD5124BRUZ100-RL7 has a guaranteed nominal resistance tolerance of ±8% and a temperature coefficient of 35 ppm/°C over −40°C to +125°C. These specifications apply to the 100 kΩ end-to-end resistance and are measured at full-scale code. The low drift enables stable gain-setting in open-loop applications without active compensation circuits, and the tight tolerance reduces binning requirements in production calibration.

Does the AD5124BRUZ100-RL7 support both I²C and SPI interfaces simultaneously?

No - the AD5124BRUZ100-RL7 uses pin-strapped interface selection: the TSSOP variant (like AD5124BRUZ100-RL7) is configured for SPI by default (SYNC/SCLK/SDI/SDO pins), while the AD5144A variant uses I²C (SCL/SDA/ADDR/RESET). Interface mode is determined by internal metal option and package variant - AD5124BRUZ100-RL7 is SPI-only and does not support runtime switching to I²C.

How many wiper positions does the AD5124BRUZ100-RL7 provide per channel?

The AD5124BRUZ100-RL7 provides 128 wiper positions (7-bit resolution) per channel. This is confirmed in Table 1 (Family Models) and Electrical Characteristics Table 2 of the Rev. E datasheet. Each of the four RDAC channels can be independently programmed to any of these 128 discrete resistance values, with monotonicity guaranteed across the full range.

What is the maximum continuous current rating for the AD5124BRUZ100-RL7 wiper terminals?

For the 100 kΩ version (AD5124BRUZ100-RL7), the maximum continuous wiper current is ±1.5 mA, as specified in Table 2 under "Maximum Continuous Current" for RAB = 100 kΩ. This limit applies to IA, IB, and IW terminals and is derived from thermal constraints and switch robustness - exceeding it risks long-term degradation of wiper contact resistance or EEPROM reliability.

Can the AD5124BRUZ100-RL7 operate with dual supplies, and what are the valid voltage ranges?

Yes - the AD5124BRUZ100-RL7 supports dual-supply operation with VDD ranging from +2.25 V to +2.75 V and VSS from −2.25 V to −2.75 V (i.e., ±2.25 V to ±2.75 V). This enables true bipolar signal handling, such as AC-coupled sensor offset nulling or audio signal attenuation with ground-referenced inputs. Terminal voltages (VA, VW, VB) must remain within VSS − 0.3 V to VDD + 0.3 V per Absolute Maximum Ratings.