Analog Devices Inc. AD5160BRJ10-R2

Overview

AD5160BRJ10-R2 from Analog Devices is a 256-position SPI-compatible digital potentiometer in SOT-23-8 package, offering 10 kΩ end-to-end resistance, ±0.25 LSB integral nonlinearity (R-INL), 45 ppm/°C temperature coefficient, and operation from 2.7 V to 5.5 V. It serves as a solid-state replacement for mechanical potentiometers in precision transducer calibration and RF amplifier biasing circuits.

For engineers reviewing the AD5160BRJ10-R2 datasheet, AD5160BRJ10-R2 pinout, AD5160BRJ10-R2 application, or AD5160BRJ10-R2 equivalent, key selection criteria include guaranteed monotonicity, midscale power-on preset, low 8 μA supply current, and compatibility with standard 3-wire SPI buses at up to 25 MHz clock frequency.

Technical Context

The AD5160BRJ10-R2 implements an 8-bit RDAC architecture with resistor ladder topology, where wiper position is controlled via SPI serial interface using MSB-first 8-bit data words. Its internal decoder maps digital codes linearly to 256 discrete tap points across the 10 kΩ fixed resistor element.

It supports both rheostat mode (W–B or W–A) and potentiometer divider mode (A–W–B), with voltage divider temperature coefficient reduced to 15 ppm/°C due to ratio-based operation. The device features ESD-protected digital inputs and requires strict power-up sequencing (GND → VDD → digital inputs → A/B/W terminals) to prevent unintended conduction through input protection diodes.

Key Specifications

Pinout & Package

AD5160BRJ10-R2 uses a JEDEC-compliant SOT-23-8 package (2.9 mm × 3 mm), optimized for space-constrained PCB layouts. Pin assignments are validated per Analog Devices Rev. C datasheet Figure 3 and Table 5.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX5487ETE+ and MCP41HV51-103, AD5160BRJ10-R2 delivers superior temperature stability (45 ppm/°C), lower quiescent current (8 μA), and guaranteed midscale startup-making it optimal for battery-powered sensor nodes and precision analog signal conditioning where long-term drift and power efficiency are critical.

Availability

AD5160BRJ10-R2 is available at Aetrix Electronics and suitable for transducer calibration, RF amplifier biasing, audio gain control, and precision ADC driver offset adjustment requiring stable component supply across automotive, industrial, and medical electronics programs.

Supply support for AD5160BRJ10-R2 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 Norwood, MA.

The AD5160 product line delivers compact, SPI-controlled digital potentiometers targeting precision analog tuning in space- and power-constrained systems-designed specifically for mechanical potentiometer replacement in sensor interfaces, RF bias networks, and calibration-critical signal paths.

FAQ

What is the power-on behavior of the AD5160BRJ10-R2?

The AD5160BRJ10-R2 features a built-in power-on preset circuit that automatically initializes the wiper to midscale (code 0x80) upon VDD application. This eliminates undefined output states during system boot and simplifies fault recovery in safety-critical applications. No external reset or initialization sequence is required for basic operation of AD5160BRJ10-R2.

Does the AD5160BRJ10-R2 support bidirectional voltage across its A, B, and W terminals?

Yes, the AD5160BRJ10-R2 allows voltage polarity reversal between A, B, and W terminals-unlike the unidirectional VDD-to-GND supply constraint. The datasheet explicitly states "no limitations on polarity with respect to each other" for resistor terminals, enabling use in AC-coupled attenuators and bipolar signal conditioning circuits without damage to AD5160BRJ10-R2.

What is the maximum current rating for the wiper terminal of the AD5160BRJ10-R2?

The AD5160BRJ10-R2 wiper terminal supports ±20 mA pulsed current and 4.7 mA continuous current for the 10 kΩ version. Exceeding these limits risks degradation of the internal CMOS switch. At zero-scale (code 0x00), only the 60 Ω wiper contact resistance remains, so designers must ensure VA–VB differential stays below 94 mV to stay within 4.7 mA continuous rating for AD5160BRJ10-R2.

How does the AD5160BRJ10-R2 achieve 15 ppm/°C temperature coefficient in potentiometer mode?

The AD5160BRJ10-R2 achieves 15 ppm/°C voltage divider temperature coefficient because output voltage depends on the *ratio* of RWA to RWB rather than absolute resistance values. Since both segments track similarly with temperature, their ratio drift is significantly lower than end-to-end resistance drift (45 ppm/°C). This inherent ratiometric stability is intrinsic to AD5160BRJ10-R2's architecture and requires no external calibration.

Can the AD5160BRJ10-R2 be used with a 3 V microcontroller SPI interface?

Yes, the AD5160BRJ10-R2 supports 3 V logic levels: VIH is specified at 2.1 V min and VIL at 0.6 V max when VDD = 3 V, ensuring reliable communication with 3 V MCUs without level shifting. Its SPI interface operates down to 2.7 V supply, and timing parameters (tDS = 5 ns, fCLK up to 25 MHz) remain valid across the full 2.7 V–5.5 V range for AD5160BRJ10-R2.