TLV2548IDW Equivalent & Substitute Parts

Part Overview

The TLV2548IDW 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. Currently in Last Time Buy status, this component requires identification of active alternative solutions for new designs and ongoing production support.

Substiute Parts

TLV2548IDW

Texas InstrumentsIn Stock: 2260TLV2548IDW Datasheet

Current PartRFQ

ADS7038IRTER

Texas InstrumentsIn Stock: 12251ADS7038IRTER Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The ADS7038IRTER qualifies as a manufacturer-recommended substitute based on the following core electrical and mechanical compatibility criteria:

Matching Parameters:

• Resolution: 12-bit (identical)
• Number of Inputs: 8 single-ended (identical)
• Architecture: SAR (identical)
• Data Interface: SPI (compatible primary interface)
• Number of A/D Converters: 1 (identical)
• Manufacturer: Texas Instruments (same source)
• RoHS3 Compliance: Both compliant
• REACH Status: Both unaffected

Differing Parameters Affecting Substitution:

• Sampling Rate: 1 MSPs (ADS7038IRTER) vs. 200 kSPS (TLV2548IDW) — higher performance in substitute
• Package: 16-WQFN (ADS7038IRTER) vs. 20-SOIC (TLV2548IDW) — different footprint
• Supply Voltage (Analog): 2.35V ~ 5.5V (ADS7038IRTER) vs. 2.7V ~ 5.5V (TLV2548IDW) — wider range in substitute
• Operating Temperature: -40°C ~ 125°C (ADS7038IRTER) vs. -40°C ~ 85°C (TLV2548IDW) — extended range in substitute
• Product Status: Active (ADS7038IRTER) vs. Last Time Buy (TLV2548IDW)

Parameter Comparison

Engineering Selection Recommendations

The ADS7038IRTER is the manufacturer-recommended substitute for the TLV2548IDW. Selection between these components should be based on the following criteria:

Use TLV2548IDW for:

• Existing designs with established 20-SOIC PCB layouts
• Applications requiring DSP interface support
• Designs constrained to higher minimum analog supply voltage (2.7V minimum)
• Designs with thermal limits at 85°C maximum operating temperature

Use ADS7038IRTER for:

• New designs requiring active product support and extended lifecycle
• Applications benefiting from 5x higher sampling rate (1 MSPs)
• Systems operating at temperatures above 85°C (up to 125°C)
• Low-voltage analog supply applications (down to 2.35V)
• Compact PCB designs utilizing 16-WQFN footprint
• Applications requiring digital window comparator, GPIO, or oscillator features

Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can ADS7038IRTER directly replace TLV2548IDW without design changes?

A: Electrical substitution is possible due to matching 12-bit resolution, 8 single-ended inputs, and SAR architecture. However, PCB layout modification is required due to different packages (20-SOIC vs. 16-WQFN). Firmware may require adjustment if DSP interface was utilized in the original design, as ADS7038IRTER supports SPI only.

Q: What are the key differences in supply voltage requirements?

A: TLV2548IDW requires minimum 2.7V analog supply, while ADS7038IRTER operates down to 2.35V. ADS7038IRTER also supports digital supply as low as 1.65V compared to 2.7V for TLV2548IDW. Both support maximum 5.5V across all supply rails.

Q: How does the sampling rate difference affect application compatibility?

A: ADS7038IRTER provides 1 MSPs versus TLV2548IDW's 200 kSPS. This 5x performance increase is backward compatible for applications designed around the slower sampling rate. Applications requiring exactly 200 kSPS operation can utilize the faster device without functional impact.

Q: Are there package-related considerations for substitution?

A: Yes. TLV2548IDW uses 20-SOIC (0.295" width, 7.50mm) while ADS7038IRTER uses 16-WQFN (3x3mm). These packages have different footprints, pin counts, and thermal characteristics. PCB redesign is mandatory for physical substitution.

Q: What is the significance of Last Time Buy status for TLV2548IDW?

A: Last Time Buy indicates Texas Instruments will cease production of TLV2548IDW. Existing inventory may be available through authorized distributors, but new designs should transition to ADS7038IRTER, which maintains Active product status with full manufacturer support.

Q: Does ADS7038IRTER support the same data interfaces?

A: Both devices support SPI interface. TLV2548IDW additionally supports DSP interface, which is not available on ADS7038IRTER. Applications using only SPI are fully compatible; DSP-dependent designs require firmware modification.