AD7875CQ Equivalent & Substitute Parts

Part Overview

The AD7875CQ 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 with dual supply voltages (±5V) and supports both SPI and parallel data interfaces. The part is currently in active production status with 36,100 units in stock. Alternative equivalent parts are available to address inventory constraints, operational temperature requirements, or packaging preferences in system designs.

Substiute Parts

AD7875CQ

Analog Devices Inc.In Stock: 36129AD7875CQ Datasheet

Current PartRFQ

AD7875KNZ

Analog Devices Inc.In Stock: 1981AD7875KNZ Datasheet

SimilarRFQ

AD7870CQ

Analog Devices Inc.In Stock: 1348AD7870CQ Datasheet

Parametric EquivalentRFQ

AD7870BQ

Analog Devices Inc.In Stock: 684AD7870BQ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AD7875CQ is determined by strict equivalence across the following critical parameters: 12-bit resolution, 100 kSPS sampling rate, single-ended input configuration, SPI and parallel data interface support, SAR architecture, internal reference, ±5V dual supply operation, and through-hole mounting compatibility. Parts are grouped into two categories:

Similar Substitute (Package Variant): AD7875KNZ maintains identical electrical specifications and base product lineage but operates within a narrower temperature range (0°C to 70°C) and uses 24-PDIP packaging instead of 24-CDIP. This part is suitable for applications not requiring extended low-temperature operation.

Parametric Equivalents (Base Product Variants): AD7870CQ and AD7870BQ are functionally equivalent across all electrical parameters and package specifications. These parts belong to the AD7870 base product family rather than AD7875, but deliver identical performance characteristics for the specified application requirements.

Parameter Comparison

Engineering Selection Recommendations

AD7875CQ (Primary Selection): Recommended for applications requiring the full operational temperature range of -40°C to 85°C with 24-CDIP ceramic package specifications. Highest inventory availability (36,100 units) ensures supply continuity. ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1) support long-term storage and reliability requirements.

AD7875KNZ (Temperature-Constrained Applications): Suitable for systems operating within 0°C to 70°C temperature limits where 24-PDIP plastic package is acceptable. Maintains identical electrical performance and interface compatibility. Use only when extended low-temperature operation below 0°C is not required.

AD7870CQ and AD7870BQ (Parametric Equivalents): Functionally interchangeable with AD7875CQ across all electrical and mechanical specifications. Both support full -40°C to 85°C temperature range and 24-CDIP packaging. Selection between these variants depends on packaging availability and inventory status. Both are ROHS3 compliant with unlimited MSL rating.

All substitute parts maintain identical compliance certifications (ROHS3, REACH Unaffected, EAR99 ECCN classification) and are suitable for direct substitution within the specified electrical and thermal operating envelope.

Frequently Asked Questions (FAQ)

Q: Can AD7875KNZ replace AD7875CQ in all applications?

A: AD7875KNZ is electrically equivalent but operates only within 0°C to 70°C. Substitution is valid only for applications not requiring operation below 0°C or above 70°C. The 24-PDIP package differs from the 24-CDIP ceramic package of the primary part; verify PCB footprint compatibility before substitution.

Q: What is the difference between AD7875CQ and AD7870CQ?

A: Both parts are 12-bit, 100 kSPS SAR ADCs with identical electrical specifications, supply requirements, and 24-CDIP packaging. The primary difference is the base product family designation (AD7875 versus AD7870). Both support the full -40°C to 85°C temperature range and are functionally interchangeable.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. AD7875CQ, AD7875KNZ, AD7870CQ, and AD7870BQ are all ROHS3 compliant with REACH Unaffected status. All parts carry unlimited moisture sensitivity rating (MSL 1).

Q: Which substitute part should I select if inventory of AD7875CQ becomes constrained?

A: AD7870CQ and AD7870BQ are parametric equivalents with identical electrical and thermal specifications. AD7870CQ has higher inventory (1,240 units) compared to AD7870BQ (672 units). Both support the full -40°C to 85°C operating range and 24-CDIP packaging required for direct substitution.

Q: Can I use AD7875KNZ in a design originally specified for AD7875CQ?

A: Only if your application operates within 0°C to 70°C. If the system requires operation below 0°C or above 70°C, AD7875KNZ is not suitable. Additionally, verify that your PCB footprint accommodates the 24-PDIP package; the 24-CDIP ceramic package has different mechanical specifications.

Q: Are the data interfaces identical across all substitute parts?

A: Yes. All parts support both SPI and parallel data interfaces with identical electrical characteristics, single-ended input configuration, and internal reference architecture.