TLV1570CPWR Equivalent & Substitute Parts

Part Overview

The TLV1570CPWR is a 10-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications requiring single-ended input processing. This device features 8 input channels with a 1.25M samples per second sampling rate and operates across a 2.7V to 5.5V supply voltage range. The component is classified as Last Time Buy, indicating discontinued production status. Identifying equivalent and substitute parts is essential for design continuity, long-term sourcing strategy, and system reliability when original inventory becomes unavailable.

Substiute Parts

TLV1570CPWR

Texas InstrumentsIn Stock: 2904TLV1570CPWR Datasheet

Current PartRFQ

ADS7955SDBTR

Texas InstrumentsIn Stock: 3964ADS7955SDBTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLV1570CPWR is determined by the following core parameters:

• Resolution: 10-bit ADC architecture
• Channel Count: 8 single-ended input channels
• Data Interface: SPI serial communication protocol
• Converter Architecture: SAR (Successive Approximation Register) topology
• Supply Voltage Compatibility: Overlapping analog and digital supply ranges
• Package Compatibility: Surface mount form factor with compatible pin pitch
• Regulatory Compliance: ROHS3 and REACH compliance status

The ADS7955SDBTR qualifies as a substitute based on matching resolution, channel count, input type, data interface, and SAR architecture. However, differences in package type (30-TSSOP versus 20-TSSOP), operating temperature range, and supply voltage specifications require evaluation against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The ADS7955SDBTR is available as an active product with extended production support, whereas the TLV1570CPWR is designated Last Time Buy. Selection between these components depends on application-specific constraints:

Sampling Rate Consideration: The TLV1570CPWR operates at 1.25M samples per second, while the ADS7955SDBTR operates at 1M samples per second. Applications requiring the higher sampling rate of the original part may not be compatible with the substitute.

Operating Temperature Range: The ADS7955SDBTR supports -40°C to 125°C operation, exceeding the TLV1570CPWR range of 0°C to 70°C. This extended range is suitable for industrial and automotive applications but is not required for commercial-grade designs.

Package Footprint: The ADS7955SDBTR uses a 30-pin package compared to the 20-pin package of the TLV1570CPWR. PCB layout redesign is necessary for substitution.

Supply Voltage: The ADS7955SDBTR digital supply range extends to 1.7V, providing greater flexibility for low-power applications. The analog supply range is slightly reduced (2.7V to 5.25V versus 2.7V to 5.5V).

Both components maintain ROHS3 compliance and are manufactured by Texas Instruments, ensuring regulatory consistency.

Frequently Asked Questions (FAQ)

Q: Can the ADS7955SDBTR directly replace the TLV1570CPWR without PCB modifications?

A: No. The ADS7955SDBTR uses a 30-TSSOP package with different pin configuration compared to the 20-TSSOP package of the TLV1570CPWR. PCB layout redesign and schematic updates are required.

Q: What is the impact of the reduced sampling rate on system performance?

A: The ADS7955SDBTR operates at 1M samples per second versus 1.25M for the TLV1570CPWR. Applications with sampling rate requirements below 1M samples per second are unaffected. Systems requiring higher sampling rates must retain the original part or identify alternative solutions.

Q: Are there firmware or software changes needed when switching to the ADS7955SDBTR?

A: Both devices use SPI interface and 10-bit resolution. Software compatibility depends on specific register definitions and timing requirements. Consult device datasheets for detailed register maps and timing specifications.

Q: Is the ADS7955SDBTR suitable for extended temperature applications?

A: Yes. The ADS7955SDBTR supports -40°C to 125°C operation, making it suitable for industrial, automotive, and harsh environment applications. The TLV1570CPWR is limited to 0°C to 70°C.

Q: What are the supply voltage constraints for substitution?

A: The ADS7955SDBTR analog supply range (2.7V to 5.25V) is slightly narrower than the TLV1570CPWR (2.7V to 5.5V). Designs operating above 5.25V analog supply are not compatible with the substitute. The ADS7955SDBTR digital supply extends to 1.7V, providing additional flexibility for low-power designs.

Q: Are both components RoHS compliant?

A: Yes. Both the TLV1570CPWR and ADS7955SDBTR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.