ADS8401IPFBR Equivalent & Substitute Parts

Part Overview

The ADS8401IPFBR 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 ADS8401IPFBR is classified as obsolete. Locating equivalent or substitute components is necessary to support legacy system maintenance, design updates, or inventory replenishment where original stock is unavailable.

Substiute Parts

ADS8401IPFBR

Texas InstrumentsIn Stock: 1372ADS8401IPFBR Datasheet

Current PartRFQ

ADS8405IPFBR

Texas InstrumentsIn Stock: 1058ADS8405IPFBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ADS8401IPFBR is determined by the following critical parameters:

Core Functional Parameters:

• Resolution: 16 bits
• Sampling Rate: 1.25 MSPS
• Number of Inputs: 1
• Architecture: SAR
• Data Interface: Parallel
• Package: 48-TQFP (7x7)
• Mounting Type: Surface Mount

Electrical Compatibility Parameters:

• Analog Supply Voltage: 5V
• Digital Supply Voltage Range: 2.95V ~ 5.25V (minimum requirement)
• Operating Temperature Range: -40°C ~ 85°C
• Reference Type: External, Internal

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 2 (1 Year)

The ADS8405IPFBR qualifies as a substitute based on matching core functional parameters, identical package specifications, and compatible electrical supply ranges. The primary difference is the input type configuration (Pseudo-Differential vs. Differential), which represents a functional variation within the same product family rather than an incompatibility.

Parameter Comparison

Engineering Selection Recommendations

The ADS8405IPFBR is the primary substitute for the obsolete ADS8401IPFBR. Selection is supported by the following factors:

Product Status: The ADS8405IPFBR maintains active product status with Texas Instruments, ensuring continued availability and manufacturing support. The ADS8401IPFBR is obsolete, making the ADS8405IPFBR the appropriate long-term alternative.

Compliance Alignment: Both devices maintain ROHS3 compliance and identical Moisture Sensitivity Level (MSL) ratings, ensuring regulatory and environmental compatibility in existing supply chains.

Electrical Compatibility: The ADS8405IPFBR digital supply voltage range (2.7V ~ 5.25V) encompasses the ADS8401IPFBR range (2.95V ~ 5.25V), providing broader operational flexibility while maintaining compatibility with existing power delivery designs.

Functional Equivalence: Identical resolution (16 bits), sampling rate (1.25 MSPS), package form factor (48-TQFP), and data interface (Parallel) ensure direct functional replacement in circuit designs.

Input Configuration Consideration: The ADS8405IPFBR uses pseudo-differential input architecture compared to the ADS8401IPFBR differential input. This difference requires circuit-level evaluation to confirm compatibility with existing signal conditioning and reference networks.

Frequently Asked Questions (FAQ)

Q: Can the ADS8405IPFBR directly replace the ADS8401IPFBR without circuit modifications?

A: Both devices share identical resolution, sampling rate, package, and data interface specifications. However, the input type differs (Pseudo-Differential vs. Differential). Circuit compatibility depends on the signal conditioning network and reference configuration in the original design. Evaluation of the input stage is required.

Q: What is the difference between Differential and Pseudo-Differential input configurations?

A: Differential inputs accept signals referenced to a common-mode voltage between two input pins. Pseudo-Differential inputs reference a single input signal to a common ground or reference pin. The choice affects signal conditioning requirements and noise performance characteristics.

Q: Are there packaging differences between the main part and substitute?

A: The ADS8401IPFBR is supplied in bulk packaging, while the ADS8405IPFBR is supplied in Tape & Reel (TR) format. Both use the same 48-TQFP (7x7) surface mount package. Tape & Reel packaging is standard for automated assembly processes.

Q: Does the ADS8405IPFBR support the same supply voltage range?

A: The ADS8405IPFBR digital supply range (2.7V ~ 5.25V) is broader than the ADS8401IPFBR (2.95V ~ 5.25V). Both support 5V analog supply. The ADS8405IPFBR provides additional flexibility for lower voltage digital supply applications.

Q: Are both devices RoHS compliant?

A: Yes. Both the ADS8401IPFBR and ADS8405IPFBR are ROHS3 compliant with identical Moisture Sensitivity Level (MSL) ratings of 2 (1 Year).

Q: What is the product status difference, and why does it matter?

A: The ADS8401IPFBR is obsolete, indicating Texas Instruments no longer manufactures or supports this device. The ADS8405IPFBR maintains active status, ensuring ongoing availability, technical support, and manufacturing continuity for new designs and legacy system maintenance.