TLC2543CDWR Equivalent & Substitute Parts

Part Overview

The TLC2543CDWR is a 12-bit Analog to Digital Converter (ADC) with 11 single-ended inputs, utilizing a Successive Approximation Register (SAR) architecture. This device operates at a sampling rate of 66 kSPS and communicates via SPI interface. The TLC2543CDWR is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement planning.

Substiute Parts

TLC2543CDWR

Texas InstrumentsIn Stock: 16944TLC2543CDWR Datasheet

Current PartRFQ

ADS7952SBDBTR

Texas InstrumentsIn Stock: 1604ADS7952SBDBTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC2543CDWR is determined by the following core electrical and mechanical parameters:

• Resolution: 12-bit ADC capability
• Architecture: SAR-based conversion
• Data Interface: SPI communication protocol
• Input Configuration: Single-ended analog inputs
• Reference Type: External voltage reference
• Supply Voltage Compatibility: Operation within specified analog and digital supply ranges
• Sampling Rate: Minimum performance threshold of 66 kSPS or higher
• Package Type: Surface mount compatibility

The ADS7952SBDBTR meets these substitution criteria while offering enhanced specifications including extended temperature range, wider supply voltage tolerance, and higher sampling rate capability.

Parameter Comparison

Engineering Selection Recommendations

The ADS7952SBDBTR is the manufacturer-recommended substitute for the obsolete TLC2543CDWR. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment.

Key considerations for selection:

• Active Product Status: The ADS7952SBDBTR is actively manufactured and supported, providing long-term availability and supply chain stability compared to the obsolete TLC2543CDWR.
• Enhanced Performance: The ADS7952SBDBTR provides 15x higher sampling rate (1000 kSPS vs. 66 kSPS), enabling applications requiring faster conversion cycles.
• Extended Operating Range: Operating temperature range of -40°C to 125°C accommodates broader environmental conditions than the TLC2543CDWR (0°C to 70°C).
• Flexible Supply Voltage: The ADS7952SBDBTR accepts analog supply from 2.7V to 5.25V and digital supply from 1.7V to 5.25V, providing greater design flexibility.
• Additional Input Channel: The ADS7952SBDBTR provides 12 inputs versus 11 on the TLC2543CDWR.
• Package Transition: The shift from 20-SOIC to 38-TSSOP requires PCB layout modification and design validation.

Frequently Asked Questions (FAQ)

Q: Can the ADS7952SBDBTR directly replace the TLC2543CDWR without design changes?

A: The ADS7952SBDBTR is functionally equivalent in core ADC operation (12-bit resolution, SAR architecture, SPI interface, external reference, single-ended inputs). However, the package change from 20-SOIC to 38-TSSOP requires PCB layout redesign. Firmware compatibility depends on SPI protocol implementation; verify timing and command sequences match your application requirements.

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

A: The ADS7952SBDBTR offers wider supply voltage ranges (analog: 2.7V-5.25V vs. 5V fixed; digital: 1.7V-5.25V vs. 5V fixed), extended operating temperature (-40°C to 125°C vs. 0°C to 70°C), and significantly higher sampling rate (1000 kSPS vs. 66 kSPS). Both maintain external reference architecture and SPI communication.

Q: Are there compliance or certification differences?

A: Both devices are ROHS3 compliant and REACH unaffected. The ADS7952SBDBTR has Moisture Sensitivity Level 2 (1 Year) compared to MSL 1 (Unlimited) for the TLC2543CDWR, requiring appropriate handling during storage and assembly.

Q: Why does the ADS7952SBDBTR have more input channels?

A: The ADS7952SBDBTR provides 12 single-ended inputs versus 11 on the TLC2543CDWR. This additional channel does not affect substitution compatibility; applications using 11 inputs operate identically with one unused input channel.

Q: What is the impact of the package change from 20-SOIC to 38-TSSOP?

A: The 38-TSSOP package is larger and has different pin assignments. PCB footprint, routing, and assembly processes require modification. Verify pin-to-function mapping and ensure adequate board space for the larger package before implementation.