Analog Devices Inc. AD7264BCPZ-5

Overview

AD7264BCPZ-5 from Analog Devices is a dual-channel, 14-bit, simultaneous-sampling SAR ADC with integrated PGA (×1 to ×128), on-chip 2.5 V reference, four comparators, and SPI-compatible serial interface. It delivers 1 MSPS per channel, >1 GΩ input impedance, and operates from −40°C to +105°C for high-precision sensor signal acquisition in motor control feedback loops.

For engineers reviewing the AD7264BCPZ-5 datasheet, AD7264BCPZ-5 pinout, AD7264BCPZ-5 application, or AD7264BCPZ-5 equivalent, this page provides verified specifications including SNR (78 dB at gain=2), THD (−77 dB), integral nonlinearity (±3 LSB), comparator propagation delay (as low as 0.12 µs), and LFCSP-48 package mapping - all confirmed from Rev. E datasheet and Analog Devices official documentation.

Technical Context

The AD7264BCPZ-5 integrates two independent SAR ADCs with true differential analog inputs, each preceded by a programmable-gain amplifier supporting 14 discrete gain settings (×1–×128). Its dual simultaneous sampling architecture enables synchronized capture of position feedback signals from dual encoder channels without inter-channel skew.

It embeds four dedicated comparators: A/B optimized for low power (3–8.5 µA), C/D for speed (0.12–0.32 µs propagation delay); all referenced to separate supply domains (CA_CBVCC/CC_CDVCC) and ground planes (CA_CB_GND/CC_CD_GND) to isolate noise-sensitive analog paths from digital switching.

Key Specifications

Pinout & Package

AD7264BCPZ-5 is housed in a 48-lead LFCSP (Lead Frame Chip Scale Package) with exposed thermal pad requiring solder connection to PCB ground for thermal management and noise reduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7264BCPZ-5, AD7262BCPZ-5 trades 2 bits of resolution for lower cost and power, while AD7606C-18 sacrifices integration (no PGA/comparators) to achieve higher resolution - making AD7264BCPZ-5 optimal for space-constrained, sensor-integrated motor control designs requiring balanced speed, precision, and on-chip signal conditioning.

Availability

AD7264BCPZ-5 is available at Aetrix Electronics and suitable for motor control feedback systems, industrial sensor monitoring platforms, and power quality analyzers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD7264BCPZ-5 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 AD7264 product line was designed specifically for high-accuracy, multi-channel data acquisition in motion control and industrial automation - integrating PGA, comparators, and simultaneous sampling to reduce system-level component count and improve timing integrity.

FAQ

What is the maximum guaranteed sampling rate for AD7264BCPZ-5?

The AD7264BCPZ-5 guarantees a throughput rate of 1 MSPS per ADC channel under all operating conditions (−40°C to +105°C, AVCC = 4.75 V to 5.25 V). This is achieved with a minimum SCLK frequency of 200 kHz and maximum of 34 MHz, with conversion time fixed at 19 × tSCLK. The device remains functional at 40 MHz SCLK at 25°C, but full AC performance is only specified up to 34 MHz.

Does AD7264BCPZ-5 support true differential analog inputs?

Yes, AD7264BCPZ-5 features true differential analog inputs for both ADC channels: VA+/VA− for ADC A and VB+/VB− for ADC B. Each pair accepts a differential input voltage of ±VREF/2 with common-mode voltage ranges that scale with PGA gain setting - for example, AVCC/2 ± 0.4 V at gain = 2 - enabling robust rejection of noise and interference in noisy industrial environments.

How does the on-chip PGA in AD7264BCPZ-5 improve system design?

The AD7264BCPZ-5's integrated PGA offers 14 programmable gain settings (×1 to ×128) with per-channel calibration registers. This eliminates the need for external op-amp stages when interfacing with low-level sensors like resolvers or strain gauges, reducing component count, board area, and signal path errors. Gain selection is implemented via hardware pins (G0–G3) or software-controlled registers, providing flexibility in production and field calibration.

Can AD7264BCPZ-5 operate with an external reference?

Yes, AD7264BCPZ-5 supports external reference operation via the REFSEL pin. When REFSEL is tied to GND, the internal 2.5 V reference is disabled, and external references can be applied to VREFA and/or VREFB pins. These pins accept 2.5 V references with ±1 µA leakage current and require 20 pF decoupling capacitance. The internal reference remains available as a buffered 2.5 V source when enabled.

What are the key differences between the four comparators in AD7264BCPZ-5?

AD7264BCPZ-5 integrates two low-power comparators (A and B) drawing 3–8.5 µA each, and two high-speed comparators (C and D) with propagation delays as low as 0.12 µs. All four share independent analog inputs (CA±/CB± and CC±/CD±) and supplies (CA_CBVCC/CC_CDVCC), allowing domain-isolated operation. Comparator A/B are suited for continuous status monitoring, while C/D serve time-critical functions like encoder pole counting or overcurrent trip detection.