Analog Devices Inc. AD7265BCP

Overview

AD7265BCP 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 and supports −40°C to +125°C industrial temperature range, enabling simultaneous sampling in motor control feedback loops.

For engineers reviewing the AD7265BCP datasheet, AD7265BCP pinout, AD7265BCP application, or AD7265BCP equivalent, key selection criteria include dual-channel simultaneous 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 AD7265BCP integrates two independent 12-bit 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 timing fully controlled by SCLK (up to 16 MHz).

It supports three analog input configurations per ADC-single-ended, pseudo-differential, and fully differential-selected via SGL/DIFF and RANGE pins. Output coding is straight binary or twos complement, and the internal reference can be overdriven by an external source (100 mV to VDD) when REF SELECT is high.

Key Specifications

Pinout & Package

AD7265BCP is available in a 32-lead LFCSP (CP-32-2) package with exposed pad for thermal management. Pin layout supports separate analog/digital ground planes (AGND ×3, DGND ×2), dual decoupling capacitor pins (DCAPA/DCAPB), and dedicated analog input banks (VA1–VA6, VB1–VB6).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7266BCPZ, AD7265BCP trades 1 MSPS lower speed for 5 mW lower power at 3 V, making it optimal for thermally constrained or battery-operated systems; versus ADS8327IPW, AD7265BCP provides simultaneous dual-channel acquisition essential for vector control but with 4-bit lower resolution.

Availability

AD7265BCP is available at Aetrix Electronics and suitable for motor control feedback, industrial PLC analog input modules, energy metering, and automotive battery monitoring requiring stable component supply across extended temperature ranges.

Supply support for AD7265BCP 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, headquartered in Norwood, MA.

The AD7265 belongs to Analog Devices' precision SAR ADC product line, engineered for industrial automation, energy infrastructure, and automotive systems demanding simultaneous multi-channel acquisition with low latency and high DC/AC accuracy.

FAQ

What is the maximum sampling rate supported by the AD7265BCP?

The AD7265BCP supports a maximum throughput rate of 1 MSPS. This is achieved with a 16 MHz SCLK and results in a total conversion time of 875 ns (14 SCLK cycles). The device maintains specified dynamic performance-including 70 dB SINAD at 50 kHz-only up to this rated speed, and operation beyond 1 MSPS is not guaranteed per the datasheet.

Does the AD7265BCP require an external reference voltage?

No, the AD7265BCP includes an accurate on-chip 2.5 V reference (±0.2% max at 25°C, 20 ppm/°C max). External reference is optional and enabled only when the REF SELECT pin is driven high; in that case, an external source (100 mV to VDD) may be applied to DCAPA or DCAPB. For most applications, the internal reference eliminates BOM cost and board space.

How does the AD7265BCP handle simultaneous sampling of two channels?

The AD7265BCP contains two independent 12-bit SAR ADCs, each with its own track-and-hold amplifier and 3-channel multiplexer. When CS falls, both ADCs sample their selected inputs (e.g., VA1 and VB1) at the exact same instant. Aperture delay matching is guaranteed ≤200 ps, ensuring time-aligned digitization critical for vector calculations in motor control.

What package options are available for the AD7265BCP?

The AD7265BCP is offered exclusively in a 32-lead LFCSP (CP-32-2) package with an exposed thermal pad. This RoHS-compliant, lead-free package measures 5 mm × 5 mm × 0.85 mm and features a θJA of 108.2°C/W. It is distinct from the TQFP variant (AD7265BSTZ); the "BCP" suffix specifically denotes the LFCSP option.

Can the AD7265BCP interface directly with common microcontrollers?

Yes, the AD7265BCP features an SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface with standard control signals (CS, SCLK, DOUTA, DOUTB). It operates with logic levels defined by VDRIVE (2.7 V to 5.25 V), allowing direct connection to MCUs such as ADSP-BF532, TMS320C541, or ARM Cortex-M series without level-shifting, provided VDRIVE matches the host I/O voltage.