TLV1570IPW Equivalent & Substitute Parts

Part Overview

The TLV1570IPW 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, a SAR (Successive Approximation Register) architecture, and SPI digital interface, operating across a supply voltage range of 2.7V to 5.5V. The TLV1570IPW is currently in Last Time Buy status, making identification of functionally equivalent alternatives essential for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Resolution (Bits)	10
Number of Input Channels	8
Input Type	Single Ended
Sampling Rate	1.25 MSPS
Architecture	SAR
Data Interface	SPI
Configuration	MUX-ADC
Analog Supply Voltage	2.7V – 5.5V
Digital Supply Voltage	2.7V – 5.5V
Operating Temperature Range	-40°C to 85°C
Package Type	20-TSSOP
Reference Type	External, Internal

Substitute Part Grouping Explanation

Substitution eligibility for the TLV1570IPW is determined by the following core parameters:

Resolution: 10-bit conversion capability
Channel Count: 8 single-ended input channels
Architecture: SAR-based analog-to-digital conversion
Interface Protocol: SPI digital communication
Supply Voltage Compatibility: Overlapping analog and digital supply ranges
Operating Temperature: Functional range within specified limits
Package Compatibility: Physical form factor and pin count considerations

The ADS7955SDBTR meets these substitution criteria while introducing enhanced specifications in certain areas. Both devices share identical resolution, channel configuration, input type, architecture, and SPI interface. The substitute part operates across an extended temperature range and offers improved digital supply voltage flexibility, making it suitable for applications where the TLV1570IPW is no longer available.

Parameter Comparison

Parameter	TLV1570IPW	ADS7955SDBTR	Compatibility Notes
Resolution (Bits)	10	10	Identical
Number of Input Channels	8	8	Identical
Input Type	Single Ended	Single Ended	Identical
Sampling Rate (MSPS)	1.25	1.0	Substitute has lower sampling rate
Architecture	SAR	SAR	Identical
Data Interface	SPI	SPI	Identical
Analog Supply Voltage	2.7V – 5.5V	2.7V – 5.25V	Overlapping range; substitute has narrower upper limit
Digital Supply Voltage	2.7V – 5.5V	1.7V – 5.25V	Substitute supports lower digital supply voltage
Operating Temperature Range	-40°C to 85°C	-40°C to 125°C	Substitute supports extended upper temperature limit
Reference Type	External, Internal	External	Substitute supports external reference only
Package Type	20-TSSOP	30-TFSOP	Different package; pin count and footprint differ
Product Status	Last Time Buy	Active	Substitute is in active production
RoHS Compliance	ROHS3 Compliant	ROHS3 Compliant	Both compliant

Engineering Selection Recommendations

The ADS7955SDBTR serves as a functional substitute for the TLV1570IPW in applications where the primary design requirements center on 10-bit resolution, 8-channel single-ended input acquisition, and SPI interface operation. Both devices maintain ROHS3 compliance and are manufactured by Texas Instruments, ensuring consistent quality and documentation standards.

Selection of the ADS7955SDBTR is appropriate when:

The application does not require the TLV1570IPW's internal reference option, as the substitute supports external reference only
The sampling rate requirement does not exceed 1.0 MSPS (the substitute's maximum rate versus the original's 1.25 MSPS)
The operating environment does not exceed 85°C, or conversely, when extended temperature operation to 125°C is beneficial
The analog supply voltage remains within the 2.7V to 5.25V range
PCB layout can accommodate the 30-TFSOP package footprint, which differs from the original 20-TSSOP package

The substitute part's active production status ensures long-term availability and supply chain continuity compared to the original part's Last Time Buy designation.

Frequently Asked Questions (FAQ)

Q: Can the ADS7955SDBTR directly replace the TLV1570IPW without PCB modifications?

A: No. The ADS7955SDBTR uses a 30-TFSOP package while the TLV1570IPW uses a 20-TSSOP package. These packages have different pin counts and physical footprints, requiring PCB layout redesign. Pin-to-pin compatibility cannot be assumed.

Q: What is the impact of the lower sampling rate on the ADS7955SDBTR?

A: The ADS7955SDBTR operates at a maximum sampling rate of 1.0 MSPS compared to the TLV1570IPW's 1.25 MSPS. Applications requiring conversion rates above 1.0 MSPS cannot use this substitute without performance degradation.

Q: Does the ADS7955SDBTR support internal reference voltage like the original part?

A: No. The ADS7955SDBTR supports external reference only, whereas the TLV1570IPW supports both external and internal reference configurations. Designs relying on internal reference functionality require alternative solutions.

Q: Are there supply voltage compatibility concerns?

A: The analog supply voltage range of the ADS7955SDBTR (2.7V – 5.25V) is slightly narrower than the TLV1570IPW (2.7V – 5.5V). Applications operating at analog supply voltages above 5.25V cannot use the substitute. The digital supply voltage range of the substitute (1.7V – 5.25V) is broader, supporting lower voltage logic systems.

Q: What certifications and compliance standards apply to both parts?

A: Both the TLV1570IPW and ADS7955SDBTR are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Both carry HTSUS code 8542.39.0001.

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