Analog Devices Inc. AD7265BSUZ-REEL

Overview

AD7265BSUZ-REEL from Analog Devices is a dual 12-bit, 1 MSPS successive approximation ADC with 3-channel multiplexed analog inputs per ADC, pin-configurable single-ended/differential/pseudo-differential input modes, on-chip 2.5 V reference (±0.2% max at 25°C), and SPI/QSPI/MICROWIRE/DSP-compatible serial interface - used in high-speed industrial data acquisition and motor control feedback loops.

For engineers reviewing the AD7265BSUZ-REEL datasheet, AD7265BSUZ-REEL pinout, AD7265BSUZ-REEL application, or AD7265BSUZ-REEL equivalent, key selection criteria include simultaneous dual-channel sampling latency (875 ns), channel-to-channel isolation (–88 dB typ), flexible analog input range selection (0 V to VREF or 0 V to 2×VREF), low power consumption (7 mW at 3 V/1 MSPS), and operation across –40°C to +125°C.

Technical Context

The AD7265BSUZ-REEL integrates two independent 12-bit SAR ADCs, each with a 3-channel analog multiplexer and wide-bandwidth track-and-hold amplifier supporting >30 MHz input frequencies. Conversion is initiated on the falling edge of CS, with timing fully synchronized to SCLK (up to 16 MHz).

It supports three analog input configurations per ADC: 12 single-ended channels, 6 fully differential pairs, or 6 pseudo-differential pairs - selected via SGL/DIFF, RANGE, and A2–A0 pins. Output coding is straight binary or twos complement, with no pipeline delay and deterministic 14-SCLK conversion time.

Key Specifications

Pinout & Package

AD7265BSUZ-REEL is packaged in a 32-lead TQFP (SU-32-2) with exposed pad, requiring connection of EPAD to DGND/AGND plane via multiple vias for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel SAR ADC applications.

Compared with AD7265BSUZ-REEL, AD7266BCPZ-REEL7 offers higher throughput without layout changes, while ADS8684IPWR trades simultaneous dual-channel capability for on-chip signal conditioning - making AD7265BSUZ-REEL optimal for phase-coherent, high-speed dual-sensor acquisition where timing determinism is critical.

Availability

AD7265BSUZ-REEL is available at Aetrix Electronics and suitable for industrial motor control, automotive battery monitoring, PLC analog input modules, and energy metering applications requiring stable component supply, extended temperature operation, and high channel-to-channel coherence.

Supply support for AD7265BSUZ-REEL 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 AD7265 belongs to Analog Devices' precision SAR ADC product line, engineered for high-speed, low-latency data acquisition in industrial automation, motor control, and energy infrastructure where deterministic timing and channel matching are essential.

FAQ

What is the maximum sampling rate supported by the AD7265BSUZ-REEL?

The AD7265BSUZ-REEL supports a maximum throughput rate of 1 MSPS per ADC, with simultaneous dual-channel conversion enabled by its two independent SAR cores. At 16 MHz SCLK, the total conversion and readout time is fixed at 875 ns (14 SCLK cycles), and this timing remains consistent across the full operating temperature range (–40°C to +125°C). The AD7265BSUZ-REEL does not support oversampling or decimation modes that increase effective resolution at lower rates.

Does the AD7265BSUZ-REEL require an external reference, or can it operate with its internal reference?

The AD7265BSUZ-REEL can operate with its internal 2.5 V reference (±0.2% max at 25°C, 20 ppm/°C drift) by tying REF SELECT to DGND and connecting 470 nF decoupling capacitors to DCAPA and DCAPB. An external reference (100 mV to VDD) may be applied via DCAPA/DCAPB when REF SELECT is high - enabling higher accuracy or custom voltage scaling. The internal reference is sufficient for most industrial applications without added BOM cost or board space.

How does the AD7265BSUZ-REEL handle simultaneous dual-channel conversion and data readout?

The AD7265BSUZ-REEL performs true simultaneous sampling and conversion on both ADCs, with results appearing concurrently on DOUTA and DOUTB after 875 ns. Each output delivers 12-bit data MSB-first, prefixed by two leading zeros. If only one serial port is available, holding CS low for 16 additional SCLK cycles retrieves the second ADC's data on the same pin - preserving hardware simplicity while maintaining temporal coherence critical for vector control algorithms.

What are the analog input configuration options supported by the AD7265BSUZ-REEL?

The AD7265BSUZ-REEL supports three analog input modes per ADC: 12 single-ended channels (VA1–VA6, VB1–VB6), 6 fully differential pairs (e.g., VA1+/VA1−), or 6 pseudo-differential pairs - selected via SGL/DIFF (differential vs. single-ended), RANGE (0–VREF vs. 0–2×VREF), and A2–A0 (channel pair address). All configurations use the same pin assignments; no external switching or re-routing is needed, reducing design complexity and layout risk.

Is the AD7265BSUZ-REEL pin-compatible with other devices in the AD726x family?

Yes - the AD7265BSUZ-REEL shares identical pinout and package (32-lead TQFP) with the AD7266BCPZ-REEL7 (2 MSPS version) and AD7265BRUZ (32-lead LFCSP variant). Firmware and layout are interchangeable between AD7265BSUZ-REEL and AD7266BCPZ-REEL7, enabling performance scalability without redesign. However, the AD7265BSUZ-REEL is not pin-compatible with earlier AD7262 or AD7264 due to differing channel count, reference architecture, and pin functions.