AD7714AR-3 Equivalent & Substitute Parts

Part Overview

The AD7714AR-3 is a 24-bit Sigma-Delta analog-to-digital converter manufactured by Analog Devices Inc., designed for precision data acquisition applications. This device features 3 to 5 differential and pseudo-differential inputs with integrated programmable gain amplification (PGA) and operates across a wide temperature range of -40°C to 85°C. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

AD7714AR-3

Analog Devices Inc.In Stock: 1253AD7714AR-3 Datasheet

Current PartRFQ

AD7714ARZ-3

Analog Devices Inc.In Stock: 1980AD7714ARZ-3 Datasheet

DirectRFQ

AD7124-4BRUZ

Analog Devices Inc.In Stock: 3755AD7124-4BRUZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AD7714AR-3 is determined by the following critical parameters: 24-bit resolution, Sigma-Delta architecture, external reference capability, SPI/DSP interface compatibility, and surface-mount packaging. Substitute parts must maintain functional equivalence in data acquisition performance while accommodating the electrical and mechanical constraints of the original design.

The substitute parts are grouped into two categories:

Direct Equivalent (AD7714ARZ-3): Identical electrical specifications, architecture, and packaging. Differs only in product status (active vs. obsolete) and packaging format (tube vs. unspecified).

Functional Alternative (AD7124-4BRUZ): Maintains core 24-bit Sigma-Delta architecture and SPI interface but introduces differences in input count, sampling rate, package type, and supply voltage flexibility. This part is suitable only when design constraints permit accommodation of these parameter variations.

Parameter Comparison

Engineering Selection Recommendations

AD7714ARZ-3 is the recommended direct substitute for the obsolete AD7714AR-3. This part maintains identical electrical specifications, input configuration, and package footprint while offering active product status and ROHS3 compliance. The transition from the original part to AD7714ARZ-3 requires no circuit redesign or PCB layout modification. Both parts are classified as REACH Unaffected and carry identical ECCN and HTSUS codes.

AD7124-4BRUZ serves as a functional alternative when design flexibility permits accommodation of the following differences: increased input channel count (4 to 7 vs. 3 to 5), higher sampling rate (19.2 kHz vs. 1 kHz), reduced package size (24-TSSOP vs. 24-SOIC), and expanded supply voltage range. This part introduces single-ended input capability and an integrated temperature sensor. The narrower digital supply voltage range (1.65V to 3.6V) and different package type necessitate PCB redesign. Selection of this alternative is appropriate only when the application requirements align with its enhanced specifications and the design can accommodate package footprint changes.

Frequently Asked Questions (FAQ)

Q: Can AD7714ARZ-3 be used as a direct replacement for AD7714AR-3 without circuit modification?

A: Yes. AD7714ARZ-3 is electrically and mechanically identical to AD7714AR-3. Both parts feature 24-bit resolution, 1 kHz sampling rate, 3 to 5 differential/pseudo-differential inputs, identical supply voltage ranges, and 24-SOIC packaging. No circuit redesign is required.

Q: What are the key differences between AD7714AR-3 and AD7124-4BRUZ?

A: The primary differences are: sampling rate (1 kHz vs. 19.2 kHz), input channel count (3-5 vs. 4-7), input type flexibility (pseudo-differential only vs. differential and single-ended), package type (24-SOIC vs. 24-TSSOP), digital supply voltage range (3V-5.25V vs. 1.65V-3.6V), and additional integrated temperature sensor in AD7124-4BRUZ. These differences require circuit and PCB redesign.

Q: Is AD7124-4BRUZ suitable for applications requiring the exact 1 kHz sampling rate of AD7714AR-3?

A: AD7124-4BRUZ operates at 19.2 kHz, which is 19.2 times faster than the original part. While the higher sampling rate provides enhanced performance in many applications, it does not match the original specification. Selection depends on whether the application can tolerate or benefit from increased sampling rate.

Q: What compliance certifications apply to the substitute parts?

A: AD7714ARZ-3 and AD7124-4BRUZ are both ROHS3 compliant and REACH unaffected. Both carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications as the original AD7714AR-3.

Q: Does the package change from 24-SOIC to 24-TSSOP affect PCB compatibility?

A: Yes. The 24-TSSOP package (0.173" width) is significantly smaller than the 24-SOIC package (0.295" width). PCB layout and footprint must be redesigned to accommodate the different package dimensions and pin spacing.

Q: Are there inventory considerations when selecting between substitute parts?

A: AD7714ARZ-3 has 1,924 units in stock, while AD7124-4BRUZ has 3,647 units available. Both parts are in active production status, ensuring long-term availability compared to the obsolete AD7714AR-3.