AD7623ACPZ Equivalent & Substitute Parts

Part Overview

The AD7623ACPZ is a 16-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 1.33 Megasamples per second with differential input configuration and supports multiple data interfaces including SPI, Parallel, and DSP protocols. The device is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

AD7623ACPZ

Analog Devices Inc.In Stock: 1230AD7623ACPZ Datasheet

Current PartRFQ

AD7623ASTZ

Analog Devices Inc.In Stock: 1441AD7623ASTZ Datasheet

SimilarRFQ

AD7985BCPZ

Analog Devices Inc.In Stock: 2450AD7985BCPZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AD7623ACPZ is determined by the following critical parameters: resolution (16-bit), architecture (SAR), number of inputs (1), reference capability (external and internal), supply voltage range (2.37V ~ 2.63V), and operating temperature range (-40°C ~ 85°C). Package type and mounting configuration are secondary considerations that may require PCB redesign but do not affect functional compatibility.

Two substitute parts meet the core functional requirements:

AD7623ASTZ maintains identical electrical specifications to the AD7623ACPZ, including 16-bit resolution, 1.33 Megasamples per second sampling rate, differential input configuration, and full data interface support (SPI, Parallel, DSP). The primary difference is packaging: AD7623ASTZ uses 48-LQFP (7x7) instead of 48-LFCSP-VQ. This part is currently active in production.

AD7985BCPZ provides 16-bit resolution and SAR architecture with identical supply voltage and temperature specifications. However, this part operates at 2.5 Megasamples per second (higher sampling rate), features pseudo-differential input configuration (versus differential), and supports only SPI and DSP interfaces (parallel interface not available). The package is 20-LFCSP (4x4), representing a significant footprint reduction. This part is currently active in production.

Parameter Comparison

Engineering Selection Recommendations

For Direct Functional Replacement: AD7623ASTZ is the preferred substitute when package redesign is not feasible. Both parts share identical electrical specifications, sampling rate, and interface capabilities. AD7623ASTZ is currently in active production status with ROHS3 compliance certification, ensuring long-term availability and regulatory alignment.

For Space-Constrained Applications: AD7985BCPZ offers a 75% reduction in package footprint (20-LFCSP versus 48-LFCSP) and provides higher sampling rate performance (2.5 Megasamples per second versus 1.33 Megasamples per second). Selection of this part requires design accommodation for pseudo-differential input configuration and elimination of parallel interface dependency, as only SPI and DSP protocols are supported. This part is currently in active production with ROHS3 compliance certification.

Both substitute parts maintain identical supply voltage ranges, temperature operating specifications, and SAR architecture. Selection between AD7623ASTZ and AD7985BCPZ depends on application requirements for sampling rate, input configuration, interface protocol support, and physical package constraints.

Frequently Asked Questions (FAQ)

Q: Can AD7623ASTZ directly replace AD7623ACPZ without firmware changes?

A: Yes. AD7623ASTZ maintains identical electrical specifications, sampling rate (1.33 Megasamples per second), resolution (16-bit), input configuration (differential), and data interface support (SPI, Parallel, DSP). The primary design consideration is package type: AD7623ASTZ uses 48-LQFP versus the original 48-LFCSP-VQ. PCB layout modification is required, but no firmware or signal processing changes are necessary.

Q: What are the key differences between AD7623ASTZ and AD7985BCPZ?

A: AD7623ASTZ maintains 1.33 Megasamples per second sampling rate with differential input and full interface support (SPI, Parallel, DSP). AD7985BCPZ increases sampling rate to 2.5 Megasamples per second, changes input configuration to pseudo-differential, and supports only SPI and DSP interfaces (parallel interface not available). AD7985BCPZ also provides significant package size reduction (20-LFCSP versus 48-LFCSP).

Q: Is parallel interface support critical for my application?

A: If your design requires parallel data output, AD7985BCPZ is not suitable as it supports only SPI and DSP interfaces. In this case, AD7623ASTZ is the appropriate substitute. If your application uses only SPI or DSP protocols, AD7985BCPZ becomes a viable option with the added benefit of higher sampling rate and smaller footprint.

Q: What is the difference between differential and pseudo-differential input configurations?

A: Differential input (AD7623ACPZ and AD7623ASTZ) accepts two independent signal inputs and measures the voltage difference between them. Pseudo-differential input (AD7985BCPZ) references one input against a common-mode voltage, typically ground or a reference voltage. Application-specific signal conditioning requirements determine which configuration is appropriate.

Q: Are both substitute parts currently available?

A: Yes. Both AD7623ASTZ and AD7985BCPZ are classified as active products in current production. The original AD7623ACPZ is obsolete. Both substitutes carry ROHS3 compliance certification and are available through authorized Analog Devices distributors.

Q: What supply voltage tolerance should I verify?

A: AD7623ACPZ and AD7623ASTZ require 2.37V ~ 2.63V for both analog and digital supplies. AD7985BCPZ requires 2.375V ~ 2.625V for both supplies. These ranges are compatible with standard 2.5V supply rails. Verify your power supply regulation meets the specified tolerance before implementation.