TLV2548IPWR Equivalent & Substitute Parts

Part Overview

The TLV2548IPWR is a 12-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications requiring 8 single-ended inputs with a 200 kSPS sampling rate. The device operates across a 2.7V to 5.5V supply range and features a SAR (Successive Approximation Register) architecture with both external and internal reference options. The TLV2548IPWR is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain component availability for new production runs and long-term system support.

Key Parameters

Parameter	TLV2548IPWR
Number of Bits	12
Sampling Rate (Per Second)	200k
Number of Inputs	8
Input Type	Single Ended
Data Interface	SPI, DSP
Architecture	SAR
Reference Type	External, Internal
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

Substitute Part Grouping Explanation

Substitution eligibility for the TLV2548IPWR is determined by the following core electrical and mechanical parameters:

Resolution: 12-bit ADC architecture
Channel Count: 8 single-ended input channels
Sampling Performance: Minimum 200 kSPS capability
Interface Protocol: SPI compatibility (primary requirement)
Supply Voltage Compatibility: Overlap within 2.7V to 5.5V range
Operating Temperature Range: Support for -40°C to 85°C minimum
Package Type: Surface mount configuration

The ADS7038IRTER meets the core functional requirements of 12-bit resolution, 8 single-ended inputs, and SPI interface. However, differences in sampling rate, reference architecture, package form factor, and operating temperature range must be evaluated for specific application requirements.

Parameter Comparison

Parameter	TLV2548IPWR	ADS7038IRTER	Compatibility Notes
Number of Bits	12	12	Matched
Sampling Rate (Per Second)	200k	1M	Substitute exceeds requirement
Number of Inputs	8	8	Matched
Input Type	Single Ended	Single Ended	Matched
Data Interface	SPI, DSP	SPI	SPI compatible; DSP interface not available
Architecture	SAR	SAR	Matched
Reference Type	External, Internal	Supply	Different reference architecture
Voltage - Supply, Analog	2.7V ~ 5.5V	2.35V ~ 5.5V	Substitute supports lower minimum voltage
Voltage - Supply, Digital	2.7V ~ 5.5V	1.65V ~ 5.5V	Substitute supports lower minimum voltage
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	Substitute supports extended upper range
Package / Case	20-TSSOP	16-WQFN (3x3)	Different package; PCB layout redesign required
Product Status	Last Time Buy	Active	Substitute actively manufactured

Engineering Selection Recommendations

The ADS7038IRTER is an active production alternative to the end-of-life TLV2548IPWR. Both devices share the same 12-bit resolution, 8-channel single-ended input configuration, and SAR architecture. The ADS7038IRTER provides superior sampling performance at 1 MSPS and extended operating temperature support to 125°C, making it suitable for applications requiring higher conversion rates or wider thermal operating windows.

Key considerations for substitution:

Package Transition: Migration from 20-TSSOP to 16-WQFN (3x3) requires PCB layout redesign and footprint modification.
Reference Architecture: The ADS7038IRTER uses supply-referenced architecture, whereas the TLV2548IPWR supports both external and internal references. Applications dependent on external reference capability require design review.
Interface Protocol: The ADS7038IRTER supports SPI only. Applications utilizing DSP interface mode are not compatible without firmware modification.
Supply Voltage: The ADS7038IRTER operates at lower minimum voltages (2.35V analog, 1.65V digital), providing flexibility for low-power designs.
Compliance: Both devices maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can the ADS7038IRTER directly replace the TLV2548IPWR without PCB modifications?

A: No. The ADS7038IRTER uses a 16-pin WQFN package versus the 20-pin TSSOP package of the TLV2548IPWR. PCB layout redesign, including footprint changes and signal routing, is required.

Q: What is the impact of the different reference architectures?

A: The TLV2548IPWR supports both external and internal voltage references, while the ADS7038IRTER uses supply-referenced architecture. Applications requiring external reference voltage control must evaluate whether supply-referenced operation meets accuracy and stability requirements.

Q: Is the higher sampling rate of the ADS7038IRTER (1 MSPS vs. 200 kSPS) a concern?

A: No. Higher sampling rate capability is backward compatible with applications designed for 200 kSPS operation. The ADS7038IRTER can be configured to operate at lower conversion rates if required by the application.

Q: Does the ADS7038IRTER support DSP interface mode?

A: No. The ADS7038IRTER supports SPI interface only. Applications currently using DSP mode require firmware modification to implement SPI-based communication protocols.

Q: Are there thermal operating range implications?

A: The ADS7038IRTER supports -40°C to 125°C operation, exceeding the TLV2548IPWR range of -40°C to 85°C. This provides additional margin for applications operating in elevated temperature environments.

Q: What are the supply voltage compatibility considerations?

A: The ADS7038IRTER operates at lower minimum supply voltages (2.35V analog, 1.65V digital) compared to the TLV2548IPWR (2.7V both supplies). This enables use in low-power applications while maintaining compatibility with standard 3.3V and 5V supply systems.

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