ADS7824U Equivalent & Substitute Parts

Part Overview

The ADS7824U is a 12-bit Analog to Digital Converter manufactured by Texas Instruments, configured as a 4-channel, single-ended input SAR (Successive Approximation Register) device in a 28-SOIC surface mount package. This component operates with both SPI and parallel data interfaces, supporting external and internal voltage references at 5V supply levels. The ADS7824U is currently in Last Time Buy status, making identification of equivalent and substitute parts essential for ongoing design support and procurement planning.

Substiute Parts

ADS7824U

Texas InstrumentsIn Stock: 1439ADS7824U Datasheet

Current PartRFQ

ADS8664IDBTR

Texas InstrumentsIn Stock: 20248ADS8664IDBTR Datasheet

MFR RecommendedRFQ

ADS7824UB

Burr BrownIn Stock: 1219ADS7824UB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ADS7824U are classified based on strict parametric alignment with the core functional requirements:

Parametric Equivalent (ADS7824UB): This substitute maintains identical electrical specifications across all critical parameters: 12-bit resolution, 4-channel single-ended input configuration, 40 kSPS sampling rate, SAR architecture, SPI and parallel data interfaces, external and internal reference support, and 5V dual supply operation. The package type (28-SOIC) and operating temperature range (-40°C to 85°C) are identical. The primary distinction is packaging format (Bulk vs. Tube) and manufacturer designation (Burr Brown vs. Texas Instruments). This part qualifies as a direct parametric substitute.

Manufacturer Recommended Substitute (ADS8664IDBTR): This part represents a higher-performance alternative from Texas Instruments. While specific parametric details are limited in the provided data, the ADS8664IDBTR operates in the same functional category (Data Acquisition ADC) and maintains RoHS3 compliance and EAR99 classification. The package differs (38-TFSOP vs. 28-SOIC), requiring PCB layout modification. This substitute is suitable when design flexibility permits package change and higher performance capability is beneficial.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (No Design Changes): The ADS7824UB is the appropriate selection when pin-for-pin and package compatibility are required. Both parts maintain identical electrical specifications, package geometry (28-SOIC), and operating parameters. The ADS7824UB is currently in Active product status with 1166 units in stock, providing supply continuity. Both parts carry ROHS3 compliance and EAR99 classification.

For Design Flexibility Applications: The ADS8664IDBTR from Texas Instruments represents an alternative when PCB layout modification is acceptable. As an Active product with significantly higher inventory (20139 units), this part offers improved long-term availability. The MSL rating of 2 (1 Year) provides superior moisture protection compared to the ADS7824U MSL rating of 3 (168 Hours), beneficial for extended storage or humid environment applications. Package change from 28-SOIC to 38-TFSOP requires PCB redesign.

Supply Chain Consideration: The ADS7824U Last Time Buy status necessitates transition planning. The ADS7824UB provides immediate parametric continuity, while the ADS8664IDBTR offers enhanced long-term supply security through Texas Instruments' active product line.

Frequently Asked Questions (FAQ)

Q: Can the ADS7824UB replace the ADS7824U without PCB modification? A: Yes. The ADS7824UB maintains identical pin configuration, package type (28-SOIC), and all electrical specifications. No PCB layout changes are required for direct substitution.

Q: What are the key differences between ADS7824UB and ADS8664IDBTR? A: The ADS7824UB is a parametric equivalent with identical 12-bit, 4-channel, 40 kSPS specifications in a 28-SOIC package. The ADS8664IDBTR uses a different package (38-TFSOP), requiring PCB redesign. Specific parametric differences for the ADS8664IDBTR are not provided in the available data.

Q: Why is the ADS7824U marked as Last Time Buy? A: Last Time Buy status indicates the manufacturer is discontinuing this product line. Customers must transition to alternative parts. The ADS7824UB and ADS8664IDBTR are recommended successors.

Q: Does package change from 28-SOIC to 38-TFSOP affect electrical performance? A: Package type does not alter electrical performance. However, the 38-TFSOP package has different pin pitch and footprint dimensions, requiring PCB layout modification and potential signal integrity re-evaluation based on new trace routing.

Q: Are all substitute parts RoHS3 compliant? A: Yes. The ADS7824U, ADS7824UB, and ADS8664IDBTR are all ROHS3 compliant and carry EAR99 classification.

Q: What is the significance of MSL rating differences? A: MSL (Moisture Sensitivity Level) indicates moisture absorption limits during storage. ADS7824U has MSL 3 (168 hours), while ADS8664IDBTR has MSL 2 (1 year). Lower MSL numbers allow longer storage periods without baking requirements, beneficial for inventory management.