TLV2548IPW Equivalent & Substitute Parts

Part Overview

The TLV2548IPW 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 features a Successive Approximation Register (SAR) architecture with integrated multiplexer and sample-and-hold functionality, operating across a 2.7V to 5.5V supply range in a 20-TSSOP surface mount package.

The TLV2548IPW has reached Last Time Buy status, indicating end-of-life production. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs and long-term system support.

Substiute Parts

TLV2548IPW

Texas InstrumentsIn Stock: 1185TLV2548IPW Datasheet

Current PartRFQ

ADS7038IRTER

Texas InstrumentsIn Stock: 12251ADS7038IRTER Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLV2548IPW is determined by the following critical parameters:

• Resolution & Input Configuration: 12-bit resolution with 8 single-ended inputs
• Architecture: SAR-based analog-to-digital conversion
• Data Interface Compatibility: SPI protocol support (primary interface requirement)
• Supply Voltage: Operating range must encompass or exceed 2.7V ~ 5.5V
• Thermal Range: Operating temperature must support -40°C ~ 85°C minimum
• Package Compatibility: Surface mount technology with pin-compatible or functionally equivalent footprint

The ADS7038IRTER qualifies as a manufacturer-recommended substitute based on matching core functional parameters: 12-bit resolution, 8 single-ended inputs, SAR architecture, and SPI interface. While the ADS7038IRTER offers enhanced specifications (1 MSPS sampling rate, extended temperature range to 125°C, additional features), it maintains backward compatibility with the primary electrical and interface requirements of the TLV2548IPW.

Parameter Comparison

Engineering Selection Recommendations

The ADS7038IRTER is the manufacturer-recommended substitute for the TLV2548IPW and is suitable for new designs and production transitions. Selection should be based on the following factors:

Compliance & Availability: The ADS7038IRTER maintains ROHS3 compliance and REACH unaffected status, matching the environmental and regulatory requirements of the original part. Active production status ensures long-term supply chain availability, eliminating obsolescence risk associated with the TLV2548IPW Last Time Buy designation.

Functional Compatibility: Both devices share identical 12-bit resolution, 8 single-ended input configuration, and SAR architecture. The SPI interface is common to both parts, supporting direct protocol compatibility in most applications. The ADS7038IRTER's enhanced sampling rate (1 MSPS versus 200 kSPS) and extended operating temperature range (-40°C ~ 125°C) provide performance headroom without introducing functional incompatibility.

Design Considerations: The primary design impact is package transition from 20-TSSOP to 16-WQFN (3x3). This requires PCB layout redesign and footprint modification. The reduced pin count (16 versus 20) necessitates verification of signal routing and power distribution in the target application. Applications utilizing the DSP interface of the TLV2548IPW require alternative interface implementation, as the ADS7038IRTER supports SPI only.

Frequently Asked Questions (FAQ)

Q: Can the ADS7038IRTER directly replace the TLV2548IPW without PCB modifications?

A: No. The ADS7038IRTER uses a 16-WQFN (3x3) package versus the TLV2548IPW's 20-TSSOP package. PCB layout redesign is required to accommodate the different footprint, pin count, and pinout. Pin-to-pin compatibility does not exist between these packages.

Q: What is the impact of the sampling rate difference (200 kSPS vs. 1 MSPS)?

A: The ADS7038IRTER's higher sampling rate exceeds the TLV2548IPW specification and does not create incompatibility. Applications designed for 200 kSPS operation will function correctly with the faster substitute. No firmware or software modifications are required to accommodate the increased sampling capability.

Q: Are there interface compatibility issues between the two parts?

A: Both devices support SPI interface, ensuring protocol compatibility for standard data acquisition applications. The TLV2548IPW offers an additional DSP interface option not present on the ADS7038IRTER. Applications exclusively using the DSP interface require alternative solutions or interface adaptation circuitry.

Q: Does the extended operating temperature range of the ADS7038IRTER affect compatibility?

A: No. The ADS7038IRTER's extended range (-40°C ~ 125°C) encompasses the TLV2548IPW specification (-40°C ~ 85°C). Applications operating within the original temperature range will experience no compatibility issues. The extended range provides additional design margin for high-temperature environments.

Q: What supply voltage considerations apply to the substitute?

A: The ADS7038IRTER extends the lower supply voltage limit for both analog (2.35V vs. 2.7V) and digital (1.65V vs. 2.7V) supplies. Applications operating at the TLV2548IPW's minimum voltage (2.7V) are fully compatible. Low-voltage applications below 2.7V may benefit from the ADS7038IRTER's extended range, but this requires verification against the original design specifications.

Q: Is the ADS7038IRTER suitable for new product designs?

A: Yes. The ADS7038IRTER is actively manufactured and recommended by Texas Instruments as the substitute for end-of-life TLV2548IPW devices. New designs should incorporate the ADS7038IRTER to ensure long-term supply availability and eliminate obsolescence risk.