TLV1570IPWR Equivalent & Substitute Parts

Part Overview

The TLV1570IPWR is a 10-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications requiring 8 single-ended inputs with SAR (Successive Approximation Register) architecture. The device operates across a 2.7V to 5.5V supply range and achieves a 1.25M samples per second sampling rate. Currently classified as Last Time Buy, identifying equivalent and substitute components is necessary to ensure design continuity and long-term product availability for new designs and production planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLV1570IPWR
Manufacturer	Texas Instruments
Number of Bits	10
Sampling Rate (Per Second)	1.25M
Number of Inputs	8
Input Type	Single Ended
Data Interface	SPI
Architecture	SAR
Voltage - Supply, Analog	2.7V ~ 5.5V
Voltage - Supply, Digital	2.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Product Status	Last Time Buy
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TLV1570IPWR is determined by the following core parameters:

Resolution: 10-bit ADC architecture
Channel Count: 8 single-ended inputs
Conversion Method: SAR (Successive Approximation Register)
Serial Interface: SPI protocol compatibility
Supply Voltage Overlap: Minimum 2.7V analog and digital supply compatibility
Regulatory Compliance: ROHS3 and REACH compliance status

The ADS7955SDBTR qualifies as a manufacturer-recommended substitute based on matching resolution, channel count, input type, conversion architecture, and SPI interface. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity.

Parameter Comparison

Parameter	TLV1570IPWR	ADS7955SDBTR	Compatibility Notes
Number of Bits	10	10	Matched
Sampling Rate (Per Second)	1.25M	1M	ADS7955SDBTR operates at lower sampling rate
Number of Inputs	8	8	Matched
Input Type	Single Ended	Single Ended	Matched
Data Interface	SPI	SPI	Matched
Architecture	SAR	SAR	Matched
Voltage - Supply, Analog	2.7V ~ 5.5V	2.7V ~ 5.25V	Overlapping range; ADS7955SDBTR has narrower upper limit
Voltage - Supply, Digital	2.7V ~ 5.5V	1.7V ~ 5.25V	ADS7955SDBTR supports lower digital supply minimum
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	ADS7955SDBTR supports extended upper temperature range
Package / Case	20-TSSOP	30-TFSOP	Different package types; board layout modification required
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Matched
Product Status	Last Time Buy	Active	ADS7955SDBTR is actively manufactured

Engineering Selection Recommendations

The ADS7955SDBTR is the manufacturer-recommended substitute for the TLV1570IPWR. Both devices maintain ROHS3 compliance and REACH unaffected regulatory status, ensuring compliance continuity in regulated applications.

Key considerations for selection:

Sampling Rate: The ADS7955SDBTR operates at 1M samples per second versus the TLV1570IPWR's 1.25M. Applications requiring the higher sampling rate of the original device may require design evaluation.
Package Transition: The ADS7955SDBTR uses a 30-TFSOP package compared to the 20-TSSOP of the original part. PCB layout and footprint modifications are necessary.
Supply Voltage Range: The ADS7955SDBTR's analog supply range (2.7V ~ 5.25V) is narrower than the TLV1570IPWR (2.7V ~ 5.5V). Designs operating above 5.25V analog supply require verification against the original device specifications.
Temperature Range: The ADS7955SDBTR supports -40°C to 125°C operation, extending the upper temperature capability beyond the TLV1570IPWR's -40°C to 85°C range.
Product Status: The ADS7955SDBTR is actively manufactured, providing long-term availability assurance compared to the Last Time Buy status of the TLV1570IPWR.

Frequently Asked Questions (FAQ)

Q: Can the ADS7955SDBTR directly replace the TLV1570IPWR without design changes?

A: The ADS7955SDBTR is functionally compatible as a 10-bit, 8-channel SAR ADC with SPI interface. However, the package change from 20-TSSOP to 30-TFSOP requires PCB footprint modification. Additionally, the lower sampling rate (1M vs. 1.25M samples per second) and narrower analog supply range (2.7V ~ 5.25V vs. 2.7V ~ 5.5V) must be evaluated against application requirements.

Q: What are the key electrical differences between these parts?

A: The primary electrical differences are: sampling rate (1.25M vs. 1M SPS), analog supply upper limit (5.5V vs. 5.25V), digital supply lower limit (2.7V vs. 1.7V), and operating temperature range (-40°C to 85°C vs. -40°C to 125°C). All other core parameters—resolution, channel count, input type, interface, and architecture—are identical.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the TLV1570IPWR and ADS7955SDBTR are ROHS3 compliant and REACH unaffected, ensuring regulatory compliance for applications subject to these standards.

Q: What package considerations apply to substitution?

A: The TLV1570IPWR uses a 20-TSSOP package while the ADS7955SDBTR uses a 30-TFSOP package. Both maintain the same 0.173" (4.40mm) width, but the pin count and footprint differ. PCB redesign is required for the substitute part.

Q: Is the ADS7955SDBTR suitable for applications requiring 1.25M samples per second?

A: The ADS7955SDBTR operates at 1M samples per second, which is lower than the TLV1570IPWR's 1.25M SPS capability. Applications with strict sampling rate requirements must verify that 1M SPS meets their performance specifications.

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