Analog Devices Inc. AD5232BRUZ100

Overview

AD5232BRUZ100 from Analog Devices is a nonvolatile, dual-channel digital potentiometer with 256-position resolution and 100 kΩ nominal terminal resistance. It functions as an electronically programmable variable resistor in analog signal paths, supporting both rheostat and potentiometer divider modes. Key confirmed specs include ±0.4% FS integral nonlinearity, 600 ppm/°C resistance temperature coefficient, 500 kHz bandwidth (RAB = 10 kΩ), and operation from 3 V to 5 V single supply or ±2.5 V dual supply - used for precision gain/offset adjustment in instrumentation.

For engineers reviewing the AD5232BRUZ100 datasheet, AD5232BRUZ100 pinout, AD5232BRUZ100 application, or AD5232BRUZ100 equivalent, this page delivers verified electrical characteristics, SPI interface timing, EEMEM retention behavior, wiper resistance vs. code, and dual-supply analog signal conditioning constraints - all specific to the 100 kΩ variant in 16-lead TSSOP.

Technical Context

The AD5232BRUZ100 implements two independent 8-bit RDAC registers (RDAC1/RDAC2) controlling wiper positions across matched 100 kΩ resistor arrays. Each channel features dedicated nonvolatile EEMEM storage (EEMEM1/EEMEM2) with 100-year data retention at 55°C and 100 kcycles endurance, enabling power-on preset without external memory.

Its SPI-compatible serial interface supports CPHA=0/1 and CPOL=0/1 modes, with RDY pin signaling completion of EEMEM save (25 ms typ), PR hardware preset, and WP-enabled write protection. Terminal voltage range spans VSS to VDD, permitting ground-referenced bipolar signal adjustment under ±2.5 V dual supply.

Key Specifications

Pinout & Package

AD5232BRUZ100 is housed in a thin 16-lead TSSOP (RU-16) package with θJA = 150°C/W, rated for −40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5232BRUZ100, AD5202BRUZ100 sacrifices nonvolatility and channel count for lower cost and smaller footprint, while MCP42100-I/ST offers comparable nonvolatile performance in single-channel form but omits hardware preset, user memory, and logarithmic stepping - making AD5232BRUZ100 optimal for dual-channel, field-calibratable systems requiring robust retention and flexible interface modes.

Availability

AD5232BRUZ100 is available at Aetrix Electronics and suitable for instrumentation gain calibration, programmable power supply feedback, sensor offset compensation, and programmable filter time constant applications requiring stable component supply and guaranteed long-term availability.

Supply support for AD5232BRUZ100 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 precision instrumentation, industrial automation, and communications markets since 1965.

The AD5232 belongs to Analog Devices' nonvolatile digital potentiometer product line, designed specifically for replacing mechanical potentiometers in calibration-critical analog signal chains where power-loss immunity, temperature stability, and dual-channel coordination are essential.

FAQ

What is the terminal resistance tolerance of the AD5232BRUZ100?

The AD5232BRUZ100 has a nominal terminal resistance of 100 kΩ with a tolerance of −40% to +20%, as specified in Table 1 of the Rev. C datasheet. This wide tolerance reflects process variation in thin-film resistor fabrication and requires system-level calibration for absolute resistance accuracy. The AD5232BRUZ100 maintains monotonicity and linearity (±0.4% FS INL) regardless of absolute RAB value.

Does the AD5232BRUZ100 support dual-supply operation, and what are the voltage limits?

Yes, the AD5232BRUZ100 supports true dual-supply operation from ±2.25 V to ±2.75 V (VDD/VSS), enabling ground-referenced bipolar analog signal adjustment. Terminal voltages (VA, VB, VW) must remain within VSS − 0.3 V to VDD + 0.3 V, and |VDD − VSS| must not exceed 5.5 V. This allows the AD5232BRUZ100 to interface directly with ±2.5 V op-amps without level-shifting circuitry.

How long does it take to store a wiper setting to nonvolatile memory in the AD5232BRUZ100?

Storing a wiper setting to EEMEM in the AD5232BRUZ100 takes 25 ms typical (t16 in Table 2), during which the RDY pin is asserted low. This duration is consistent across temperature and supply voltage, though datasheet notes that operation at TA = −40°C and VDD < 3 V extends save time to 35 ms. The AD5232BRUZ100 locks the shift register during this period to prevent partial writes.

Can the AD5232BRUZ100 be used in daisy-chain SPI configurations?

Yes, the AD5232BRUZ100 supports daisy-chaining via its SDO pin, which shifts out the previously loaded SDI bit pattern delayed by 16 clock pulses (Figure 2 and Figure 3). This allows multiple AD5232BRUZ100 devices to share a single SPI bus with individual CS lines, reducing MCU pin count in multi-potentiometer systems such as channelized test equipment.

What is the maximum allowable current through the A, B, or W terminals of the AD5232BRUZ100?

The AD5232BRUZ100 specifies ±2 mA continuous current and ±20 mA intermittent current for AX–BX, AX–WX, and BX–WX terminal pairs (Table 3, Absolute Maximum Ratings). Exceeding these limits risks switch degradation or thermal damage. For 100 kΩ operation, this corresponds to ≤200 mW dissipation per channel - well within the 0.05 mW typical power dissipation rating at 5 V supply.