ADCS7478AIMFX Equivalent & Substitute Parts

Part Overview

The ADCS7478AIMFX is an 8-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, featuring a single-ended input with 1 MHz sampling rate in a SOT-23-6 surface mount package. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. Substitute parts maintain identical electrical specifications and package form factor while offering improved product status and compliance certifications.

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 (Successive Approximation Register)
Configuration	S/H-ADC
Voltage Supply Range (Analog)	2.7V ~ 5.25V
Voltage Supply Range (Digital)	2.7V ~ 5.25V
Operating Temperature	-40°C ~ 125°C
Package / Case	SOT-23-6
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the ADCS7478AIMFX are classified based on substitution type and electrical compatibility. All listed substitutes maintain the core electrical parameters that define functional equivalence: 8-bit resolution, 1 MHz sampling rate, single-ended input configuration, SPI/DSP interface, SAR architecture, and SOT-23-6 package form factor. Supply voltage ranges (2.7V ~ 5.25V for both analog and digital) and operating temperature specifications are the primary determinants of direct substitutability.

Substitution categories are defined as follows:

Direct Manufacturer Substitutes: Parts with identical electrical specifications and packaging from the original manufacturer, differing only in product status or packaging format (tape & reel versus bulk).

Parametric Equivalents: Parts from alternative manufacturers meeting all electrical and mechanical specifications, enabling cross-manufacturer substitution without circuit redesign.

Manufacturer Recommended Alternatives: Parts recommended by manufacturers as functional replacements, with minor variations in operating temperature range or packaging options.

Parameter Comparison

Part Number	Manufacturer	Product Status	Resolution (Bit)	Sampling Rate (MHz)	Inputs	Input Type	Data Interface	Architecture	Voltage Supply Analog (V)	Voltage Supply Digital (V)	Operating Temp (°C)	Package	Packaging Format	RoHS Status
ADCS7478AIMFX	Texas Instruments	Obsolete	8	1	1	Single Ended	SPI, DSP	SAR	2.7 ~ 5.25	2.7 ~ 5.25	-40 ~ 125	SOT-23-6	Tube	Non-compliant
ADCS7478AIMFX/NOPB	Texas Instruments	Active	8	1	1	Single Ended	SPI, DSP	SAR	2.7 ~ 5.25	2.7 ~ 5.25	-40 ~ 125	SOT-23-6	Tape & Reel	ROHS3 Compliant
ADCS7478AIMF/NOPB	National Semiconductor	Active	8	1	1	Single Ended	SPI, DSP	SAR	2.7 ~ 5.25	2.7 ~ 5.25	-40 ~ 125	SOT-23-6	Bulk	Not specified
ADCS7478AIMFE/NOPB	Texas Instruments	Active	8	1	1	Single Ended	SPI, DSP	SAR	2.7 ~ 5.25	2.7 ~ 5.25	-40 ~ 125	SOT-23-6	Tape & Reel	ROHS3 Compliant
AD7478ARTZ-500RL7	Analog Devices Inc.	Active	8	1	1	Single Ended	SPI, DSP	SAR	2.7 ~ 5.25	2.7 ~ 5.25	-40 ~ 85	SOT-23-6	Cut Tape & Digi-Reel	ROHS3 Compliant
AD7478ARTZ-REEL7	Analog Devices Inc.	Active	8	1	1	Single Ended	SPI, DSP	SAR	2.7 ~ 5.25	2.7 ~ 5.25	-40 ~ 85	SOT-23-6	Cut Tape & Digi-Reel	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: ADCS7478AIMFX/NOPB (Texas Instruments)

This part is the direct successor to the obsolete ADCS7478AIMFX, maintaining identical electrical specifications and operating temperature range (-40°C ~ 125°C). The /NOPB designation indicates RoHS3 compliance and lead-free construction. Tape & Reel packaging is standard for production environments. This selection eliminates obsolescence risk while preserving full design compatibility.

Secondary Recommendation: ADCS7478AIMFE/NOPB (Texas Instruments)

An alternative Texas Instruments offering with identical specifications and RoHS3 compliance. Tape & Reel packaging format supports automated assembly processes. Selection of this part maintains single-source manufacturer continuity.

Cross-Manufacturer Alternative: AD7478ARTZ-500RL7 or AD7478ARTZ-REEL7 (Analog Devices Inc.)

These Analog Devices parts provide functional equivalence with RoHS3 compliance and active product status. Operating temperature range is restricted to -40°C ~ 85°C, which is narrower than the original specification. Selection of these parts is appropriate only when the application operating temperature does not exceed 85°C. Cut Tape & Digi-Reel packaging supports both manual and automated assembly.

Bulk Format Option: ADCS7478AIMF/NOPB (National Semiconductor)

This part offers bulk packaging for applications not requiring tape & reel format. Electrical specifications are identical to the original part. Bulk format is suitable for low-volume prototyping or manual assembly environments.

Frequently Asked Questions (FAQ)

Q: Can I use AD7478ARTZ-500RL7 as a direct replacement for ADCS7478AIMFX?

A: The AD7478ARTZ-500RL7 is electrically equivalent in all core parameters (8-bit resolution, 1 MHz sampling rate, single-ended input, SPI/DSP interface, SAR architecture, SOT-23-6 package). However, the operating temperature range is limited to -40°C ~ 85°C compared to the original -40°C ~ 125°C specification. Substitution is valid only if your application does not require operation above 85°C.

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

A: The /NOPB designation indicates RoHS3 compliance and lead-free construction. The ADCS7478AIMFX/NOPB is the active production version with improved compliance status. The original ADCS7478AIMFX is classified as obsolete. Electrical performance is identical; the primary difference is product lifecycle status and environmental compliance.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel, Cut Tape & Digi-Reel, and Bulk packaging formats do not affect electrical specifications or performance. Packaging selection is driven by assembly process requirements and inventory management. Tape & Reel is standard for high-volume automated assembly; bulk format is suitable for prototyping or manual assembly.

Q: Are all substitute parts RoHS compliant?

A: ADCS7478AIMFX/NOPB, ADCS7478AIMFE/NOPB, AD7478ARTZ-500RL7, and AD7478ARTZ-REEL7 are all RoHS3 compliant. ADCS7478AIMF/NOPB compliance status is not specified in available documentation. The original ADCS7478AIMFX is RoHS non-compliant.

Q: Can I mix substitute parts in the same production run?

A: Yes. All listed substitutes maintain identical electrical specifications and SOT-23-6 package form factor, enabling interchangeable use within the same circuit design. Mixing parts from different manufacturers or packaging formats does not affect electrical performance or circuit functionality.

Q: What inventory levels are available for each substitute?

A: Current inventory levels are: ADCS7478AIMFX/NOPB (1,641 units), ADCS7478AIMF/NOPB (16,142 units), ADCS7478AIMFE/NOPB (950 units), AD7478ARTZ-500RL7 (1,105 units), and AD7478ARTZ-REEL7 (6,807 units). Inventory levels are subject to change; verify current availability with your supplier.

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