Analog Devices Inc. AD7265BSUZ-REEL7

Overview

AD7265BSUZ-REEL7 from Analog Devices is a dual 12-bit, 1 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 at 25°C), and SPI/QSPI/MICROWIRE/DSP-compatible serial interface. It operates from 2.7 V to 5.25 V supplies and supports −40°C to +125°C industrial temperature range - used in motor control feedback loops, power quality monitoring, and multi-channel sensor acquisition systems.

For engineers reviewing the AD7265BSUZ-REEL7 datasheet, AD7265BSUZ-REEL7 pinout, AD7265BSUZ-REEL7 application, or AD7265BSUZ-REEL7 equivalent, key selection considerations include simultaneous dual-conversion timing (875 ns), channel-to-channel isolation (−88 dB typ), flexible input range selection (0 V to VREF or 0 V to 2×VREF), and low-power operation (7 mW at 3 V / 1 MSPS).

Technical Context

The AD7265BSUZ-REEL7 integrates two independent 12-bit SAR ADCs, each with a 3-channel multiplexer and wide-bandwidth track-and-hold amplifier capable of >30 MHz input frequencies. Conversion is initiated on the falling edge of CS, with sampling instant precisely controlled and no pipeline delay.

It supports three analog input configurations per ADC via SGL/DIFF and RANGE pins: single-ended (0 V to VREF), pseudo-differential (0 V to VREF), or fully differential (VCM ± VREF/2). Reference selection is configurable between internal 2.5 V (±20 ppm/°C) or external (100 mV to VDD), with DCAPA/DCAPB pins serving as buffered reference outputs.

Key Specifications

Pinout & Package

AD7265BSUZ-REEL7 is packaged in a 32-lead TQFP (SU-32-2) with exposed pad, requiring connection of EPAD to system AGND/DGND plane via multiple vias for thermal and noise performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7265BSUZ-REEL7, the AD7266BCPZ-REEL7 offers double throughput in identical footprint for speed-critical upgrades, while the ADS8327IPWR trades dual-channel integration and internal reference for higher resolution - making it suitable only when precision outweighs synchronization and BOM simplicity.

Availability

AD7265BSUZ-REEL7 is available at Aetrix Electronics and suitable for motor control systems, power quality analyzers, industrial IoT sensor nodes, and high-speed data acquisition modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD7265BSUZ-REEL7 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 since 1965.

The AD7265 is part of Analog Devices' precision SAR ADC portfolio designed for applications demanding simultaneous multi-channel acquisition, low power, and robust operation in harsh environments - especially where timing determinism and channel correlation are critical.

FAQ

What is the maximum sampling rate supported by the AD7265BSUZ-REEL7?

The AD7265BSUZ-REEL7 supports a maximum throughput rate of 1 MSPS per ADC, with simultaneous dual conversion enabled by its two independent SAR cores. This is achieved using a 16 MHz SCLK, resulting in an 875 ns conversion + read time. The device maintains specified AC performance (e.g., 70 dB SINAD) up to this rate in differential mode, as confirmed in Table 1 of the Rev. C datasheet.

Does the AD7265BSUZ-REEL7 require an external reference, or does it have an internal one?

The AD7265BSUZ-REEL7 includes an accurate on-chip 2.5 V reference with ±0.2% maximum initial error at 25°C and 20 ppm/°C maximum temperature coefficient. REF SELECT pin controls selection: tied low enables internal reference (DCAPA/DCAPB used for decoupling); tied high allows external reference (100 mV to VDD) applied to DCAPA and/or DCAPB. No external reference is required for standard operation.

Can the AD7265BSUZ-REEL7 perform true differential measurements on all input channels?

Yes - the AD7265BSUZ-REEL7 supports true fully differential input mode on six channel pairs: VA1/VA2, VA3/VA4, VA5/VA6 for ADC A, and VB1/VB2, VB3/VB4, VB5/VB6 for ADC B. In this mode, input range is VCM ± VREF/2 (with VCM = VREF/2) or VCM ± VREF (with VCM = VREF), as defined in Table 1 under "ANALOG INPUT" and validated in Figure 24–25 of the datasheet.

What package type is used for the AD7265BSUZ-REEL7, and what are its thermal characteristics?

The AD7265BSUZ-REEL7 uses a 32-lead TQFP (SU-32-2) package with exposed pad. Its θJA thermal impedance is 55°C/W, and θJC is 32.71°C/W. The exposed pad must be connected to the PCB ground plane via multiple thermal vias to maintain junction temperature within 150°C under maximum power dissipation (21 mW), as specified in Table 3 and Figure 2 of the Rev. C datasheet.

How does the AD7265BSUZ-REEL7 handle simultaneous dual-channel readout?

The AD7265BSUZ-REEL7 provides simultaneous dual-channel readout via dedicated DOUTA and DOUTB pins, each delivering 12-bit conversion data MSB-first on the falling edge of SCLK. Both outputs are valid concurrently after 14 SCLK cycles (875 ns @ 16 MHz). Alternatively, holding CS low for 16+ cycles allows sequential readout of both channels on a single DOUT line - enabling flexibility in microcontroller interface design.