THS12082CDAR Equivalent & Substitute Parts

Part Overview

The THS12082CDAR is a 12-bit pipelined analog-to-digital converter manufactured by Texas Instruments, designed for data acquisition applications requiring simultaneous sampling of 1 or 2 inputs. The device operates with a sampling rate of 8M samples per second and supports both differential and single-ended input configurations. Currently classified as Last Time Buy, alternative components may be necessary for new designs or when inventory becomes unavailable.

Substiute Parts

THS12082CDAR

Texas InstrumentsIn Stock: 863THS12082CDAR Datasheet

Current PartRFQ

ADS9224RIRHBR

Texas InstrumentsIn Stock: 3585ADS9224RIRHBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the THS12082CDAR requires evaluation based on the following critical parameters:

• Resolution (Number of Bits): The THS12082CDAR provides 12-bit resolution. Substitute parts may offer higher resolution (16-bit) while maintaining functional compatibility for applications not requiring the original specification.
• Sampling Rate: The 8M samples per second sampling rate is a primary performance criterion. Substitute parts with lower sampling rates (3M) may be acceptable for lower-bandwidth applications.
• Number of Inputs: The device supports 1 or 2 inputs. Substitutes must support at least 2-input configurations.
• Architecture: The pipelined architecture enables high-speed operation. Substitute parts using alternative architectures (SAR) represent a functional trade-off between speed and power consumption.
• Data Interface: The parallel interface is specific to this device. Substitutes using serial interfaces (SPI) require circuit redesign.
• Package Compatibility: The 32-TSSOP package defines the physical footprint. Substitutes in different packages (32-VQFN) require PCB layout modifications.
• Supply Voltage: Operating voltage ranges must be compatible with system power distribution.
• Temperature Range: The 0°C ~ 70°C operating range may be limiting for industrial applications. Substitutes with extended temperature ranges (-40°C ~ 125°C) provide broader deployment options.

Parameter Comparison

Engineering Selection Recommendations

The ADS9224RIRHBR is listed as the manufacturer-recommended substitute for the THS12082CDAR. Both devices are manufactured by Texas Instruments and maintain ROHS3 compliance with equivalent moisture sensitivity levels (MSL 2, 1 Year).

Selection of the ADS9224RIRHBR as a substitute introduces the following trade-offs:

• Resolution Increase: The 16-bit resolution of the ADS9224RIRHBR exceeds the 12-bit specification of the THS12082CDAR, providing enhanced signal fidelity for applications requiring higher precision.
• Sampling Rate Reduction: The 3M samples per second rate is 62.5% lower than the THS12082CDAR's 8M rate, limiting applicability to lower-bandwidth signal acquisition.
• Architecture Change: The SAR architecture replaces the pipelined design, affecting power consumption and latency characteristics.
• Interface Redesign: Migration from parallel to SPI data interface requires firmware and circuit modifications.
• Package Change: The 32-VQFN (5x5) package differs from the 32-TSSOP footprint, necessitating PCB layout revision.
• Temperature Range Extension: The -40°C ~ 125°C operating range supports broader environmental deployment compared to the original 0°C ~ 70°C specification.
• Supply Voltage Flexibility: The ADS9224RIRHBR accepts 1.65V ~ 5.5V digital supply voltage, providing greater system integration flexibility.

Both devices maintain Active or Last Time Buy status with Texas Instruments, ensuring continued availability through authorized distribution channels.

Frequently Asked Questions (FAQ)

Q: Can the ADS9224RIRHBR directly replace the THS12082CDAR without circuit modifications?

A: No. The ADS9224RIRHBR requires circuit redesign due to differences in data interface (SPI vs. Parallel), package footprint (32-VQFN vs. 32-TSSOP), and supply voltage requirements. PCB layout and firmware modifications are necessary.

Q: What is the primary functional difference between these devices?

A: The THS12082CDAR uses a pipelined architecture with 12-bit resolution and 8M sampling rate optimized for high-speed, moderate-precision applications. The ADS9224RIRHBR employs a SAR architecture with 16-bit resolution and 3M sampling rate, prioritizing precision over speed.

Q: Is the ADS9224RIRHBR suitable for applications requiring 8M samples per second?

A: No. The ADS9224RIRHBR's maximum sampling rate of 3M samples per second is insufficient for applications requiring the THS12082CDAR's 8M sampling capability. Alternative high-speed ADCs must be evaluated for such requirements.

Q: What are the package considerations for substitution?

A: The THS12082CDAR uses a 32-TSSOP package (0.240", 6.10mm width), while the ADS9224RIRHBR uses a 32-VQFN (5x5) package. These packages have different footprints, pin assignments, and thermal characteristics, requiring complete PCB redesign.

Q: Are both devices RoHS compliant?

A: Yes. Both the THS12082CDAR and ADS9224RIRHBR are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements for electronic components.

Q: What is the impact of the extended temperature range on the ADS9224RIRHBR?

A: The ADS9224RIRHBR operates from -40°C ~ 125°C compared to the THS12082CDAR's 0°C ~ 70°C range. This extended range enables deployment in industrial and automotive environments with wider temperature extremes.

Q: How do the input configurations differ between these devices?

A: The THS12082CDAR supports both differential and single-ended inputs with 1 or 2 input channels. The ADS9224RIRHBR supports only differential inputs with 2 channels. Applications requiring single-ended input capability cannot use the ADS9224RIRHBR as a direct substitute.