Analog Devices Inc. AD7264BCPZ-RL7

Overview

AD7264BCPZ-RL7 from Analog Devices is a dual-channel, 14-bit, 1 MSPS simultaneous-sampling SAR ADC with integrated PGA (×1 to ×128), four on-chip comparators, and internal 2.5 V reference. It operates from a single 5 V analog supply, supports true differential analog inputs, and delivers 78 dB SNR at gain = 2 - ideal for high-precision motor position feedback in industrial servo drives.

For engineers reviewing the AD7264BCPZ-RL7 datasheet, AD7264BCPZ-RL7 pinout, AD7264BCPZ-RL7 application, or AD7264BCPZ-RL7 equivalent, this page provides verified specifications, validated LFCSP-48 pin mapping, confirmed comparator timing behavior (e.g., 0.12 µs propagation delay for Comparator C/D), and real-world use cases in encoder interface and sensor signal conditioning.

Technical Context

The AD7264BCPZ-RL7 implements two independent successive approximation register (SAR) ADCs sharing a common clock domain, enabling true simultaneous sampling of VA± and VB± channels with no inter-channel skew. Each channel includes a programmable gain amplifier (PGA) with 14 discrete gain settings and configurable offset/gain calibration registers.

Four dedicated comparators are partitioned into two low-power pairs (A/B) and two high-speed pairs (C/D), each with separate supply domains (CA_CBVCC and CC_CDVCC) and ground references (CA_CB_GND, CC_CD_GND). The device uses a 2.5 V internal reference with ±5 mV accuracy and 20 ppm/°C drift, selectable via REFSEL pin.

Key Specifications

Pinout & Package

AD7264BCPZ-RL7 is housed in a 48-lead LFCSP (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad requiring solder connection to PCB ground. Pin functions are validated per Analog Devices Rev. E datasheet Figures 3–4 and Table 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7264BCPZ-RL7, AD7262BCPZ-RL7 trades 2 bits of resolution and all comparator functions for lower power, while ADS8684IPWR offers higher resolution at half the speed and no integrated analog front-end - making AD7264BCPZ-RL7 uniquely balanced for real-time motor control with minimal external components.

Availability

AD7264BCPZ-RL7 is available at Aetrix Electronics and suitable for industrial servo drives, high-precision sensor interfaces, and real-time protection circuits requiring stable component supply across extended temperature ranges (−40°C to +105°C).

Supply support for AD7264BCPZ-RL7 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 AD7264 product line was designed specifically for closed-loop motion control systems requiring simultaneous multi-channel acquisition, on-the-fly gain adjustment, and deterministic comparator response - targeting servo drives, robotics, and CNC equipment.

FAQ

What is the maximum guaranteed sampling rate for AD7264BCPZ-RL7?

The AD7264BCPZ-RL7 guarantees 1 MSPS throughput per ADC 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; performance is not specified above 34 MHz even though functionality extends to 40 MHz at 25°C.

Does AD7264BCPZ-RL7 support true differential input on both channels?

Yes, AD7264BCPZ-RL7 supports true differential analog inputs on both VA± and VB± channels. Each pair accepts common-mode voltages from VCM − 0.6 V to VCM + 0.8 V (at gain ≥48) with >1 GΩ input impedance, enabling direct connection to resolver secondaries or isolated current sense transformers without level-shifting circuitry.

How does the internal calibration function work in AD7264BCPZ-RL7?

The AD7264BCPZ-RL7 provides hardware-initiated offset calibration triggered by a 2 µs pulse on the CAL pin, which automatically adjusts internal registers to null device offset error. System gain calibration is performed by applying known reference signals and writing correction values to programmable gain adjust registers - both features eliminate production test calibration steps.

Can AD7264BCPZ-RL7 use an external reference instead of the internal 2.5 V source?

Yes, AD7264BCPZ-RL7 supports external reference operation. Tying REFSEL to GND disables the internal 2.5 V reference, allowing external precision references (e.g., ADR4525) to be applied to VREFA and/or VREFB pins. Input leakage is ±1 µA, and input capacitance is 20 pF - compatible with standard reference buffer designs.

What are the power supply requirements for the comparators in AD7264BCPZ-RL7?

AD7264BCPZ-RL7 uses split comparator supplies: CA_CBVCC (pins 1, 44) powers Comparators A/B (low-power mode, 3–8.5 µA total), while CC_CDVCC (pin 12, 44) powers Comparators C/D (high-speed mode, 60–170 µA total). Both accept 2.7 V to 5.25 V and require local decoupling to their respective ground planes (CA_CB_GND, CC_CD_GND).