Analog Devices Inc. AD7266BSUZ

Overview

AD7266BSUZ from Analog Devices is a dual 12-bit, 2 MSPS successive approximation ADC with pin-configurable analog inputs (12 single-ended, 6 fully differential, or 6 pseudo-differential channels), on-chip 2.5 V reference (±0.2% max @ 25°C), and SPI/QSPI/MICROWIRE/DSP-compatible serial interface - used in high-speed industrial data acquisition, motor control feedback, and power quality monitoring systems.

For engineers reviewing the AD7266BSUZ datasheet, AD7266BSUZ pinout, AD7266BSUZ application, or AD7266BSUZ equivalent, key selection criteria include simultaneous dual-channel sampling (437.5 ns conversion time), flexible input range selection (0–VREF or 0–2×VREF), channel-to-channel isolation (–88 dB typ), low-power operation (9 mW @ 3 V/1.5 MSPS), and LFCSP/TQFP package compatibility for space-constrained designs.

Technical Context

The AD7266BSUZ integrates two independent SAR ADCs, each with a 3-channel multiplexer and wide-bandwidth track-and-hold amplifier supporting >30 MHz input frequencies. Conversion is initiated on the falling edge of CS, with no pipeline delay and deterministic timing controlled by SCLK frequency (up to 32 MHz).

It supports three analog input configurations via SGL/DIFF and RANGE pins: straight binary or twos complement coding, selectable 0–VREF or 0–2×VREF ranges, and common-mode voltage options (VCM = VREF/2 or VREF). Reference flexibility includes internal 2.5 V ±0.2% reference or external reference (100 mV to VDD) applied to DCAPA/DCAPB pins.

Key Specifications

Pinout & Package

AD7266BSUZ is available in a 32-lead TQFP (SU-32-2) package with exposed pad grounded for thermal and noise performance. Pin functions are validated per Analog Devices Rev. C datasheet Figure 3 and Table 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7265BRUZ, AD7266BSUZ delivers 2× throughput at modest power increase; compared with ADS8860IDRCT, it trades resolution for simultaneous dual-channel acquisition and integrated multiplexing - critical for real-time multi-signal correlation.

Availability

AD7266BSUZ is available at Aetrix Electronics and suitable for industrial motor drives, power quality analyzers, and PLC analog input modules requiring stable component supply across extended temperature (–40°C to +125°C) and long product lifecycles.

Supply support for AD7266BSUZ 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, serving industrial, automotive, communications, and healthcare markets.

The AD7266BSUZ belongs to Analog Devices' high-speed precision SAR ADC product line, designed specifically for applications demanding simultaneous multi-channel sampling, low-latency control feedback, and robust operation in electrically noisy industrial environments.

FAQ

What is the maximum sampling rate supported by the AD7266BSUZ?

The AD7266BSUZ supports a maximum throughput rate of 2 MSPS, achieved with a 32 MHz SCLK and VDD = 4.75 V to 5.25 V. At this rate, conversion time is fixed at 437.5 ns (14 SCLK cycles), and power consumption is 27 mW. Lower rates (e.g., 1.5 MSPS at 24 MHz SCLK) reduce power to 9 mW with 3 V supplies - making AD7266BSUZ adaptable to both speed- and power-critical designs.

Does the AD7266BSUZ require an external reference, or does it have an internal one?

The AD7266BSUZ includes a precision internal 2.5 V reference with ±0.2% maximum accuracy at 25°C and 20 ppm/°C temperature coefficient. REF SELECT pin controls selection: tied low for internal reference (DCAPA/DCAPB decoupled), tied high for external reference (100 mV to VDD range). This eliminates external reference components in most applications while retaining flexibility for metrology-grade designs requiring ultra-low-drift references.

How many analog input channels does the AD7266BSUZ support, and how are they configured?

The AD7266BSUZ supports up to 12 analog input channels: six per ADC (ADC A: VA1–VA6; ADC B: VB1–VB6), configurable as 12 single-ended, 6 fully differential, or 6 pseudo-differential pairs. Configuration is controlled by SGL/DIFF (differential vs. single-ended) and RANGE (0–VREF vs. 0–2×VREF) pins, with channel selection via A2–A0 address lines - enabling flexible signal routing without external multiplexers.

What package options are available for the AD7266BSUZ, and what does 'BSUZ' indicate?

The AD7266BSUZ uses the 32-lead TQFP package (SU-32-2 footprint), with 'BSUZ' denoting the RoHS-compliant, lead-free, tape-and-reel packaged variant rated for –40°C to +125°C operation. It shares pinout compatibility with the 32-lead LFCSP version (AD7266BCPZ), allowing layout reuse across thermal or board-space constrained designs - though thermal impedance differs (55°C/W for TQFP vs. 108.2°C/W for LFCSP).

Can the AD7266BSUZ perform simultaneous sampling on both ADCs, and how is timing controlled?

Yes, the AD7266BSUZ performs true simultaneous sampling: both ADCs acquire their respective inputs on the same falling edge of CS, with conversion initiated immediately. Timing is fully synchronous - no pipeline delay, no latency mismatch. The 437.5 ns conversion time (at 32 MHz SCLK) and 200 ps max aperture delay matching ensure sub-nanosecond inter-channel alignment, critical for vector control and power calculations requiring phase-coherent voltage/current pairs.