AD7492ARZ Equivalent & Substitute Parts

Part Overview

The AD7492ARZ is a 12-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc., designed for single-ended input data acquisition applications. This SAR (Successive Approximation Register) architecture device operates at 1 MHz sampling rate with parallel data interface output. The part is currently in active production status with 1319 units available in stock. Alternative equivalent parts may be required due to packaging constraints, input channel requirements, or interface protocol preferences in system design.

Substiute Parts

AD7492ARZ

Analog Devices Inc.In Stock: 1372AD7492ARZ Datasheet

Current PartRFQ

AD7091BCPZ-RL7

Analog Devices Inc.In Stock: 11460AD7091BCPZ-RL7 Datasheet

SimilarRFQ

AD7091R-8BRUZ

Analog Devices Inc.In Stock: 2448AD7091R-8BRUZ Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AD7492ARZ is determined by the following core parameters: resolution (12 bits), sampling rate (1 MHz), input configuration (single-ended), SAR architecture, and supply voltage compatibility (2.7V ~ 5.25V minimum overlap). The AD7492ARZ uses a parallel data interface with internal reference, which represents a specific functional configuration.

Two substitute parts are identified:

AD7091BCPZ-RL7: Maintains 12-bit resolution, 1 MHz sampling rate, single-ended input, and SAR architecture. Differs in data interface (SPI/DSP instead of parallel), reference type (supply-based instead of internal), package format (8-LFCSP-UD instead of 24-SOIC), and operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C). Supply voltage range is 2.09V ~ 5.25V.

AD7091R-8BRUZ: Maintains 12-bit resolution, 1 MHz sampling rate, SAR architecture, and supply voltage compatibility (2.09V ~ 5.25V). Differs in number of inputs (8 channels vs. 1 channel), data interface (SPI/DSP instead of parallel), reference type (external/internal vs. internal only), package format (24-TSSOP instead of 24-SOIC), and operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C).

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active production status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. The AD7492ARZ is the primary selection when parallel data interface output is required and operating temperature does not exceed 85°C.

The AD7091BCPZ-RL7 is suitable when system architecture requires SPI or DSP serial interface communication, compact package footprint (8-LFCSP-UD), and extended operating temperature capability to 125°C. This part operates at lower minimum supply voltage (2.09V vs. 2.7V).

The AD7091R-8BRUZ is appropriate for multi-channel single-ended input applications requiring 8 simultaneous input channels, SPI/DSP interface, and extended temperature range to 125°C. The 24-TSSOP package provides a different footprint option compared to the 24-SOIC of the primary part. This device supports both external and internal reference configurations.

Frequently Asked Questions (FAQ)

Q: Can AD7091BCPZ-RL7 directly replace AD7492ARZ in existing designs?

A: Direct replacement requires interface protocol modification. The AD7492ARZ outputs data via parallel interface, while AD7091BCPZ-RL7 uses SPI/DSP serial interface. PCB layout and firmware changes are necessary. Package footprints differ (8-LFCSP-UD vs. 24-SOIC), requiring board redesign.

Q: What is the primary difference between AD7091BCPZ-RL7 and AD7091R-8BRUZ?

A: The AD7091BCPZ-RL7 is a single-input device in an 8-pin compact package, while AD7091R-8BRUZ provides 8 input channels in a 24-pin package. Both use SPI/DSP interface. The AD7091R-8BRUZ supports external reference configuration in addition to internal reference.

Q: Are all three parts compatible with 3.3V supply voltage?

A: Yes. The AD7492ARZ operates at 2.7V ~ 5.25V, while AD7091BCPZ-RL7 and AD7091R-8BRUZ operate at 2.09V ~ 5.25V. All three support 3.3V supply voltage within their specified ranges.

Q: Which substitute part maintains the closest functional equivalence to AD7492ARZ?

A: Neither substitute maintains complete functional equivalence. AD7091BCPZ-RL7 matches resolution, sampling rate, and single input configuration but differs in interface protocol and package. AD7091R-8BRUZ matches resolution and sampling rate but adds 8 input channels and changes interface protocol. Selection depends on specific system requirements.

Q: Can AD7091R-8BRUZ be used in applications requiring only single-channel input?

A: Yes. AD7091R-8BRUZ provides 8 input channels, but only one channel requires connection in single-channel applications. Unused channels can remain unconnected. This approach introduces unnecessary component cost and board space compared to single-input alternatives.

Q: What are the package considerations for each part?

A: AD7492ARZ uses 24-SOIC (0.295" width), AD7091BCPZ-RL7 uses 8-LFCSP-UD (2x2mm CSP), and AD7091R-8BRUZ uses 24-TSSOP (0.173" width). Each requires different PCB footprint design and assembly process considerations. The 8-LFCSP-UD is the most compact option.