ADS7824UB Equivalent & Substitute Parts

Part Overview

The ADS7824UB is a 12-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications requiring single-ended input processing. This SAR (Successive Approximation Register) architecture device features 4 input channels with a 40 kSPS sampling rate and operates from a 5V supply. The part is currently in Last Time Buy status, making identification of equivalent and substitute components essential for ongoing design support and procurement planning.

Substiute Parts

ADS7824UB

Texas InstrumentsIn Stock: 1187ADS7824UB Datasheet

Current PartRFQ

ADS8664IDBTR

Texas InstrumentsIn Stock: 20248ADS8664IDBTR Datasheet

MFR RecommendedRFQ

ADS7824U

Texas InstrumentsIn Stock: 1439ADS7824U Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ADS7824UB are classified based on parametric equivalence and manufacturer recommendation. The substitution logic is determined by the following critical parameters:

Parametric Equivalence Criteria:

• Resolution: 12-bit ADC architecture
• Sampling Rate: 40 kSPS minimum
• Input Configuration: 4 single-ended channels
• Data Interface: SPI and/or Parallel support
• Supply Voltage: 5V analog and digital
• Package Type: Surface mount SOIC or compatible footprint
• Temperature Range: -40°C to 85°C operation
• Compliance: ROHS3 and REACH requirements

Substitute Categories:

1. Parametric Equivalent – ADS7824U: Identical electrical specifications and package footprint (28-SOIC). Differs only in product status and inventory availability.

2. Manufacturer Recommended Substitute – ADS8664IDBTR: Texas Instruments recommended alternative with enhanced specifications. Different package format (38-TSSOP) requires PCB layout modification. Higher inventory availability and Active product status.

Parameter Comparison

Engineering Selection Recommendations

ADS7824U Selection Criteria: The ADS7824U is the direct parametric equivalent to the ADS7824UB. Both devices share identical electrical specifications, pin configuration, and 28-SOIC package footprint. Selection of ADS7824U is appropriate when existing PCB layouts and firmware implementations are optimized for the 28-SOIC package. Both parts maintain Last Time Buy status and equivalent MSL ratings. ROHS3 compliance and REACH unaffected status are maintained across both variants.

ADS8664IDBTR Selection Criteria: The ADS8664IDBTR is designated as the manufacturer-recommended substitute by Texas Instruments. This part carries Active product status, ensuring long-term availability and supply chain stability compared to Last Time Buy alternatives. The ADS8664IDBTR features improved moisture sensitivity (MSL 2 vs. MSL 3), providing superior reliability in humid storage and operational environments. The 38-TSSOP package requires PCB redesign and layout modification. Selection of ADS8664IDBTR is appropriate for new designs prioritizing long-term component availability and enhanced environmental performance. ROHS3 compliance and REACH unaffected status are maintained.

Frequently Asked Questions (FAQ)

Q: Can ADS7824U be used as a direct replacement for ADS7824UB without PCB modification?

A: Yes. The ADS7824U is a parametric equivalent with identical pin configuration and 28-SOIC package footprint. No PCB layout changes are required for direct substitution.

Q: What are the key differences between ADS7824UB and ADS8664IDBTR?

A: The primary differences are package format and product status. ADS7824UB uses 28-SOIC packaging while ADS8664IDBTR uses 38-TSSOP packaging, requiring PCB redesign. ADS8664IDBTR carries Active product status versus Last Time Buy for ADS7824UB. ADS8664IDBTR offers improved moisture sensitivity (MSL 2 vs. MSL 3).

Q: Does ADS8664IDBTR require firmware changes for integration?

A: Firmware compatibility depends on the specific electrical and interface specifications of the ADS8664IDBTR, which are not fully detailed in the provided data. Consultation of the ADS8664IDBTR datasheet is necessary to confirm interface protocol compatibility with existing firmware implementations.

Q: Which substitute part should be selected for new product designs?

A: For new designs, ADS8664IDBTR is the manufacturer-recommended choice due to Active product status, ensuring long-term availability and supply chain continuity. The 38-TSSOP package must be accommodated in the PCB design phase.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. Both ADS7824U and ADS8664IDBTR maintain ROHS3 compliance and REACH unaffected status, consistent with the original ADS7824UB specification.

Q: What is the impact of MSL rating differences between substitute parts?

A: ADS7824UB and ADS7824U carry MSL 3 (168 hours maximum floor life), while ADS8664IDBTR carries MSL 2 (1 year floor life). MSL 2 provides extended storage capability and reduced risk of moisture-induced failures during component handling and assembly processes.