ADCS7478AIMF Equivalent & Substitute Parts

Part Overview

The ADCS7478AIMF is an 8-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, housed in a SOT-23-6 surface mount package. This single-channel SAR (Successive Approximation Register) architecture device operates across a 2.7V to 5.25V supply range with a 1M samples per second sampling rate. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

ADCS7478AIMF

Texas InstrumentsIn Stock: 1562ADCS7478AIMF Datasheet

Current PartRFQ

ADCS7478AIMF/NOPB

National SemiconductorIn Stock: 16160ADCS7478AIMF/NOPB Datasheet

DirectRFQ

ADCS7478AIMFE/NOPB

Texas InstrumentsIn Stock: 1043ADCS7478AIMFE/NOPB Datasheet

Parametric EquivalentRFQ

ADCS7478AIMFX/NOPB

Texas InstrumentsIn Stock: 1727ADCS7478AIMFX/NOPB Datasheet

Parametric EquivalentRFQ

AD7478AAKSZ-500RL7

Analog Devices Inc.In Stock: 1606AD7478AAKSZ-500RL7 Datasheet

MFR RecommendedRFQ

AD7478AAKSZ-REEL7

Analog Devices Inc.In Stock: 3744AD7478AAKSZ-REEL7 Datasheet

MFR RecommendedRFQ

AD7478ARTZ-500RL7

Analog Devices Inc.In Stock: 1115AD7478ARTZ-500RL7 Datasheet

MFR RecommendedRFQ

AD7478ARTZ-REEL7

Analog Devices Inc.In Stock: 6888AD7478ARTZ-REEL7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ADCS7478AIMF is determined by strict equivalence across the following critical parameters: 8-bit resolution, 1M SPS sampling rate, single-channel single-ended input configuration, SPI/DSP data interface, SAR architecture, 2.7V to 5.25V dual supply voltage range, and SOT-23-6 package compatibility.

Substitute parts are grouped into three categories:

Direct Manufacturer Equivalent: ADCS7478AIMF/NOPB maintains identical electrical specifications and packaging, differing only in packaging format (Bulk vs. unspecified original packaging) and manufacturer designation (National Semiconductor vs. Texas Instruments).

Parametric Equivalents: ADCS7478AIMFE/NOPB and ADCS7478AIMFX/NOPB are Texas Instruments variants with identical core specifications but supplied in Tape & Reel format. Both are RoHS3 compliant and active products.

Manufacturer Recommended Alternatives: AD7478AAKSZ-500RL7, AD7478AAKSZ-REEL7, AD7478ARTZ-500RL7, and AD7478ARTZ-REEL7 are Analog Devices equivalents that maintain 8-bit resolution, single-channel single-ended input, SPI/DSP interface, and SAR architecture. These parts differ in package type (SC-70-6 vs. SOT-23-6) and operating temperature range (-40°C to 85°C vs. -40°C to 125°C), with sampling rates of 1.2M SPS for SC-70-6 variants and 1M SPS for SOT-23-6 variants.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the obsolete ADCS7478AIMF with minimal design modification, ADCS7478AIMFE/NOPB or ADCS7478AIMFX/NOPB are preferred. Both are active Texas Instruments products with identical electrical specifications, SOT-23-6 packaging, and extended operating temperature range (-40°C to 125°C). Both achieve RoHS3 compliance, addressing environmental regulatory requirements.

ADCS7478AIMF/NOPB from National Semiconductor provides direct parametric equivalence and active product status, though RoHS compliance status is not specified in available documentation.

For applications where package type flexibility exists, AD7478ARTZ-500RL7 and AD7478ARTZ-REEL7 maintain SOT-23-6 packaging with 1M SPS sampling rate and full parametric compatibility. These Analog Devices parts are RoHS3 compliant and active, with the trade-off of a reduced operating temperature maximum of 85°C.

AD7478AAKSZ-500RL7 and AD7478AAKSZ-REEL7 offer higher sampling rate (1.2M SPS) but require PCB layout modification due to SC-70-6 package substitution for SOT-23-6. Operating temperature is limited to -40°C to 85°C. These parts are suitable only when package redesign is acceptable and higher sampling rate provides system benefit.

Frequently Asked Questions (FAQ)

Q: Can ADCS7478AIMFE/NOPB directly replace ADCS7478AIMF without PCB modification?

A: Yes. ADCS7478AIMFE/NOPB maintains identical SOT-23-6 packaging, pin configuration, and electrical specifications. No PCB layout changes are required. The primary difference is packaging format (Tape & Reel) and RoHS3 compliance status.

Q: What is the key difference between AD7478ARTZ variants and AD7478AAKSZ variants?

A: AD7478ARTZ variants use SOT-23-6 packaging with 1M SPS sampling rate, matching the original ADCS7478AIMF footprint. AD7478AAKSZ variants use SC-70-6 packaging with 1.2M SPS sampling rate. Package selection depends on PCB layout constraints and sampling rate requirements.

Q: Are all substitute parts RoHS3 compliant?

A: ADCS7478AIMFE/NOPB, ADCS7478AIMFX/NOPB, and all Analog Devices AD7478 variants are RoHS3 compliant. ADCS7478AIMF/NOPB compliance status is not specified. The original ADCS7478AIMF is RoHS non-compliant.

Q: Does the reduced operating temperature range of AD7478 parts affect compatibility?

A: AD7478 variants operate to -40°C to 85°C, compared to ADCS7478AIMF at -40°C to 125°C. Substitution is valid only for applications where the maximum operating temperature does not exceed 85°C. Verify system thermal requirements before selection.

Q: Can I use AD7478AAKSZ parts as a direct replacement?

A: AD7478AAKSZ parts require PCB redesign due to SC-70-6 package substitution. Direct socket replacement is not possible. Use only when package change is acceptable and higher sampling rate (1.2M SPS) provides system benefit.

Q: What inventory considerations apply to these substitutes?

A: ADCS7478AIMF/NOPB has the highest inventory (16,142 pcs), followed by AD7478ARTZ-REEL7 (6,807 pcs) and AD7478AAKSZ-REEL7 (3,705 pcs). Verify supplier availability for production volume requirements.