ADS8401IPFBTG4 Equivalent & Substitute Parts

Part Overview

The ADS8401IPFBTG4 is a 16-bit Analog to Digital Converter (ADC) with a single differential input, operating at a sampling rate of 1.25 MSPS in a 48-TQFP surface mount package. This device is classified as obsolete, making identification of active equivalent parts essential for new designs and production continuity. The microPOWER™ series architecture employs a Successive Approximation Register (SAR) topology with integrated sample-and-hold functionality, supporting both external and internal voltage references.

Substiute Parts

ADS8401IPFBTG4

Texas InstrumentsIn Stock: 1220ADS8401IPFBTG4 Datasheet

Current PartRFQ

ADS8405IPFBT

Texas InstrumentsIn Stock: 35121ADS8405IPFBT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ADS8401IPFBTG4 is based on strict equivalence of core electrical and mechanical parameters. The primary substitute identified is the ADS8405IPFBT, which maintains compatibility through the following critical parameters:

• 16-bit resolution and 1.25 MSPS sampling rate
• Single-channel input configuration
• Parallel data interface with SAR architecture
• Identical 48-TQFP (7x7) surface mount package
• Matching analog supply voltage (5V) and compatible digital supply range
• Identical operating temperature range (-40°C ~ 85°C)
• Equivalent RoHS3 compliance and MSL rating

The primary distinction is the input type: the ADS8401IPFBTG4 features a true differential input, while the ADS8405IPFBT provides pseudo-differential input capability. This difference does not preclude substitution in applications where pseudo-differential input performance meets system requirements.

Parameter Comparison

Engineering Selection Recommendations

The ADS8405IPFBT is the active equivalent for the obsolete ADS8401IPFBTG4. Both devices maintain identical form factor, pinout compatibility, and core functional specifications. The ADS8405IPFBT is recommended for new designs and production continuity due to its active product status and confirmed availability. Both parts carry ROHS3 compliance and equivalent moisture sensitivity ratings, ensuring regulatory and environmental compatibility.

The digital supply voltage range of the ADS8405IPFBT (2.7V ~ 5.25V) provides extended lower-voltage operation compared to the ADS8401IPFBTG4 (2.95V ~ 5.25V), offering additional design flexibility without compromising existing applications.

Frequently Asked Questions (FAQ)

Q: Can the ADS8405IPFBT directly replace the ADS8401IPFBTG4 in existing designs?

A: Yes. Both devices share identical pinout, package geometry (48-TQFP 7x7), and core electrical specifications. No PCB modifications are required for physical substitution.

Q: What is the difference between differential and pseudo-differential input types?

A: The ADS8401IPFBTG4 features true differential input, accepting independent positive and negative signal paths. The ADS8405IPFBT provides pseudo-differential input, where the negative input is referenced to a common ground. Substitution is valid when system signal conditioning accommodates pseudo-differential input requirements.

Q: Are there supply voltage compatibility concerns?

A: The ADS8405IPFBT supports a lower digital supply minimum (2.7V vs. 2.95V). Existing designs operating at or above 2.95V digital supply voltage experience no compatibility issues. The analog supply voltage (5V) and operating temperature range (-40°C ~ 85°C) are identical.

Q: What is the inventory status of these parts?

A: The ADS8401IPFBTG4 is obsolete with limited stock availability. The ADS8405IPFBT is an active product with confirmed high-volume availability, making it the preferred choice for production applications.

Q: Do both parts carry the same compliance certifications?

A: Yes. Both the ADS8401IPFBTG4 and ADS8405IPFBT are ROHS3 compliant, REACH unaffected, and carry identical MSL ratings (2, 1 Year), ensuring equivalent environmental and regulatory compliance.