ADCS7478AIMFE Equivalent & Substitute Parts

Part Overview

The ADCS7478AIMFE is an 8-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for single-ended input applications with a 1 MHz sampling rate. The device operates across a supply voltage range of 2.7V to 5.25V for both analog and digital domains, utilizing a Successive Approximation Register (SAR) architecture with integrated Sample-and-Hold functionality. The main part number ADCS7478AIMFE is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity.

Key Parameters

Parameter	Value
Resolution	8 Bit
Sampling Rate	1 MHz
Number of Inputs	1
Input Type	Single Ended
Data Interface	SPI, DSP
Architecture	SAR
Configuration	S/H-ADC
Voltage - Supply, Analog	2.7V ~ 5.25V
Voltage - Supply, Digital	2.7V ~ 5.25V
Operating Temperature	-40°C ~ 125°C
Package / Case	SOT-23-6
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the ADCS7478AIMFE is determined by strict equivalence across the following critical parameters: 8-bit resolution, 1 MHz sampling rate, single-ended input configuration, SPI/DSP data interface, SAR architecture with integrated Sample-and-Hold, dual supply voltage range (2.7V to 5.25V for both analog and digital), operating temperature range (-40°C to 125°C), and SOT-23-6 surface mount package. Substitute parts are grouped into two categories: Direct Manufacturer Equivalents (same part number with different packaging designations) and Parametric Equivalents (functionally identical specifications from the same or equivalent manufacturer base).

Parameter Comparison

Parameter	ADCS7478AIMFE	ADCS7478AIMFE/NOPB	ADCS7478AIMF/NOPB	ADCS7478AIMFX/NOPB
Manufacturer	Texas Instruments	Texas Instruments	National Semiconductor	Texas Instruments
Product Status	Obsolete	Active	Active	Active
Number of Bits	8	8	8	8
Sampling Rate (Per Second)	1M	1M	1M	1M
Number of Inputs	1	1	1	1
Input Type	Single Ended	Single Ended	Single Ended	Single Ended
Data Interface	SPI, DSP	SPI, DSP	SPI, DSP	SPI, DSP
Architecture	SAR	SAR	SAR	SAR
Voltage - Supply, Analog	2.7V ~ 5.25V	2.7V ~ 5.25V	2.7V ~ 5.25V	2.7V ~ 5.25V
Voltage - Supply, Digital	2.7V ~ 5.25V	2.7V ~ 5.25V	2.7V ~ 5.25V	2.7V ~ 5.25V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	SOT-23-6	SOT-23-6	SOT-23-6	SOT-23-6
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant
Packaging Type	Not specified	Tape & Reel (TR)	Bulk	Tape & Reel (TR)

Engineering Selection Recommendations

For new designs and production applications, ADCS7478AIMFE/NOPB and ADCS7478AIMFX/NOPB are the primary recommended substitutes, both manufactured by Texas Instruments with Active product status and ROHS3 compliance. These parts maintain identical electrical and mechanical specifications while offering improved regulatory compliance compared to the obsolete ADCS7478AIMFE. ADCS7478AIMF/NOPB, manufactured by National Semiconductor, provides parametric equivalence with Active status but lacks specified RoHS certification. Selection between Tape & Reel and Bulk packaging variants depends on production volume and supply chain requirements. All substitute parts maintain full compatibility with existing circuit designs utilizing the ADCS7478AIMFE.

Frequently Asked Questions (FAQ)

Q: Can ADCS7478AIMFE/NOPB directly replace ADCS7478AIMFE in existing designs?

A: Yes. ADCS7478AIMFE/NOPB is a direct manufacturer equivalent with identical electrical specifications, pin configuration, and functional performance. The primary difference is packaging format (Tape & Reel versus unspecified) and improved RoHS3 compliance status.

Q: What is the difference between ADCS7478AIMFE/NOPB and ADCS7478AIMFX/NOPB?

A: Both parts are Texas Instruments products with identical electrical and mechanical specifications. The difference lies in packaging designation and inventory availability. Both are Active status with ROHS3 compliance.

Q: Is ADCS7478AIMF/NOPB (National Semiconductor) compatible with ADCS7478AIMFE?

A: Yes. ADCS7478AIMF/NOPB is a parametric equivalent with matching 8-bit resolution, 1 MHz sampling rate, single-ended input, SPI/DSP interface, SAR architecture, supply voltage range, operating temperature, and SOT-23-6 package. It is manufactured by National Semiconductor and carries Active product status.

Q: Why is the original ADCS7478AIMFE marked as obsolete?

A: The ADCS7478AIMFE is classified as obsolete by the manufacturer. Active equivalent alternatives are available with improved compliance certifications and continued production support.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) and Bulk packaging formats contain identical die and electrical specifications. Packaging selection is determined by production volume, handling requirements, and supply chain logistics.

Q: Are all substitute parts RoHS compliant?

A: ADCS7478AIMFE/NOPB and ADCS7478AIMFX/NOPB are ROHS3 compliant. ADCS7478AIMF/NOPB does not specify RoHS status in the provided data.

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