ADS8401IBPFBT Equivalent & Substitute Parts

Part Overview

The ADS8401IBPFBT is a 16-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications requiring single-channel differential input conversion. This device operates as a successive approximation register (SAR) ADC with a sampling rate of 1.25 MSPS and is housed in a 48-TQFP surface mount package.

The ADS8401IBPFBT has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for systems utilizing this component.

Substiute Parts

ADS8401IBPFBT

Texas InstrumentsIn Stock: 859ADS8401IBPFBT Datasheet

Current PartRFQ

ADS8405IBPFBT

Texas InstrumentsIn Stock: 66019ADS8405IBPFBT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ADS8401IBPFBT is determined by the following critical parameters:

Resolution and Sampling Rate: The substitute part must maintain 16-bit resolution and 1.25 MSPS sampling rate to preserve signal fidelity and system timing requirements.

Package and Pinout: The 48-TQFP (7x7) surface mount package is mandatory for mechanical and electrical compatibility with existing PCB layouts.

Supply Voltage Compatibility: Digital supply voltage range must overlap with or encompass the original specification (2.95V ~ 5.25V) to ensure reliable operation across the intended power distribution network.

Architecture and Interface: SAR architecture with parallel data interface must be maintained to preserve firmware, signal processing algorithms, and system integration.

Input Configuration: While the original part specifies differential input, pseudo-differential input configuration on substitute parts remains functionally compatible for single-ended or differential signal acquisition applications.

Compliance and Certification: RoHS3 compliance and MSL rating (2, 1 Year) must be maintained for manufacturing and environmental requirements.

Parameter Comparison

Engineering Selection Recommendations

The ADS8405IBPFBT is the manufacturer-recommended substitute for the obsolete ADS8401IBPFBT. Both devices are manufactured by Texas Instruments and belong to the microPOWER™ series.

Product Status Advantage: The ADS8405IBPFBT maintains active product status, ensuring continued availability, manufacturing support, and long-term supply chain stability compared to the obsolete ADS8401IBPFBT.

Electrical Compatibility: The ADS8405IBPFBT maintains identical resolution (16-bit), sampling rate (1.25 MSPS), package (48-TQFP), and operating temperature range (-40°C ~ 85°C). The digital supply voltage range (2.7V ~ 5.25V) is compatible with the original specification, with extended lower voltage capability.

Input Configuration: The transition from differential to pseudo-differential input does not compromise functionality for applications requiring single-channel analog conversion. Pseudo-differential input configuration supports both single-ended and differential signal acquisition modes.

Compliance Certification: Both devices maintain ROHS3 compliance, REACH unaffected status, and identical MSL rating (2, 1 Year), satisfying manufacturing and environmental requirements without modification to assembly processes.

Inventory and Availability: The ADS8405IBPFBT is available in significantly higher quantities (65,980 pcs) compared to the obsolete ADS8401IBPFBT, supporting immediate procurement and production scheduling.

Frequently Asked Questions (FAQ)

Q: Can the ADS8405IBPFBT directly replace the ADS8401IBPFBT without PCB modifications?

A: Yes. Both devices use identical 48-TQFP (7x7) packaging and pinout. No PCB layout changes are required for mechanical or electrical integration.

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

A: Differential input (ADS8401IBPFBT) accepts two independent signal inputs with separate reference paths. Pseudo-differential input (ADS8405IBPFBT) uses a common reference for both input channels. For single-channel applications, pseudo-differential configuration provides equivalent performance.

Q: Are there supply voltage compatibility concerns when substituting the ADS8405IBPFBT?

A: No. The ADS8405IBPFBT digital supply voltage range (2.7V ~ 5.25V) encompasses the original specification (2.95V ~ 5.25V). Systems operating within the original voltage range will function without modification.

Q: Does the ADS8405IBPFBT maintain the same sampling rate and resolution?

A: Yes. Both devices provide 16-bit resolution and 1.25 MSPS sampling rate, preserving signal acquisition performance and system timing characteristics.

Q: What is the product status advantage of the ADS8405IBPFBT?

A: The ADS8405IBPFBT is active product status, ensuring ongoing manufacturing support, technical documentation updates, and long-term supply availability. The ADS8401IBPFBT is obsolete and subject to discontinuation without notice.

Q: Are there compliance or certification differences between these devices?

A: No. Both devices maintain ROHS3 compliance, REACH unaffected status, and identical MSL rating (2, 1 Year). Manufacturing and environmental requirements remain unchanged.