AD7631BCPZ Equivalent & Substitute Parts

Part Overview

The AD7631BCPZ is an 18-bit Analog to Digital Converter (ADC) manufactured by Analog Devices Inc., part of the PulSAR® series. This single-input SAR (Successive Approximation Register) ADC operates at a 250 kSPS sampling rate with differential input configuration and supports multiple data interfaces including SPI, Parallel, and DSP protocols. The device is packaged in a 48-LFCSP-VQ (7x7) surface mount package.

The AD7631BCPZ has reached obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this ADC architecture.

Substiute Parts

AD7631BCPZ

Analog Devices Inc.In Stock: 1294AD7631BCPZ Datasheet

Current PartRFQ

AD7631BSTZ

Analog Devices Inc.In Stock: 1265AD7631BSTZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AD7631BCPZ is determined by strict equivalence across the following core parameters:

• Resolution: 18 bits
• Sampling Rate: 250 kSPS
• Input Configuration: Single differential input
• Architecture: SAR topology
• Data Interface Support: SPI, Parallel, and DSP protocols
• Supply Voltages: 5V analog and digital
• Operating Temperature Range: -40°C to 85°C
• Base Product Number: AD7631

The AD7631BSTZ qualifies as a direct functional equivalent. Both devices share identical electrical specifications, resolution, sampling performance, and interface capabilities. The primary distinction lies in packaging format and product lifecycle status.

Parameter Comparison

Engineering Selection Recommendations

The AD7631BSTZ is the qualified substitute for the obsolete AD7631BCPZ. Both devices are manufactured by Analog Devices Inc. and maintain identical electrical and functional specifications across all critical parameters.

The AD7631BSTZ carries Active product status, ensuring continued availability and manufacturer support. This device is RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

The primary consideration for substitution is the package format transition from 48-LFCSP-VQ to 48-LQFP. Both packages maintain identical 7x7 mm footprints and surface mount compatibility. PCB layout modifications may be required to accommodate the different pin configuration and lead geometry between LFCSP and LQFP packages.

Frequently Asked Questions (FAQ)

Q: Are the AD7631BCPZ and AD7631BSTZ electrically interchangeable?

A: Yes. Both devices share identical 18-bit resolution, 250 kSPS sampling rate, differential input configuration, and support for SPI, Parallel, and DSP data interfaces. Electrical performance and functional operation are equivalent.

Q: What is the primary difference between these two parts?

A: The main difference is packaging. The AD7631BCPZ uses a 48-LFCSP-VQ package, while the AD7631BSTZ uses a 48-LQFP package. Both maintain the same 7x7 mm footprint but differ in lead configuration and soldering approach.

Q: Can I use the AD7631BSTZ as a direct drop-in replacement?

A: Electrical functionality is direct. However, PCB layout modifications are necessary due to different package geometries. Pin assignments and lead positions differ between LFCSP and LQFP packages, requiring design review and potential board redesign.

Q: Why is the AD7631BCPZ listed as obsolete?

A: The AD7631BCPZ has reached end-of-life status. The AD7631BSTZ remains in active production and is the recommended path forward for new designs and ongoing supply requirements.

Q: Are there any compliance differences between these parts?

A: The AD7631BSTZ is RoHS3 compliant and REACH unaffected. Both devices share identical MSL 3 moisture sensitivity ratings. The active status of the AD7631BSTZ ensures compliance with current regulatory standards.

Q: What supply voltages do these ADCs require?

A: Both devices require 5V for analog supply and 5V for digital supply. Operating temperature range is -40°C to 85°C for both parts.