TLV2544CDR Equivalent & Substitute Parts

Part Overview

The TLV2544CDR is a 12-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications requiring 4-channel single-ended input conversion. This device features a Successive Approximation Register (SAR) architecture with an integrated multiplexer and sample-and-hold circuit, operating at a 200 kSPS sampling rate. The TLV2544CDR is classified as Last Time Buy, indicating that the original manufacturer has discontinued or will discontinue production. Finding equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs or system redesigns.

Key Parameters

Parameter	Value
Resolution (Bits)	12
Number of Input Channels	4
Input Type	Single Ended
Sampling Rate	200 kSPS
Architecture	SAR
Data Interface	SPI, DSP
Configuration	MUX-S/H-ADC
Analog Supply Voltage	2.7V ~ 5.5V
Digital Supply Voltage	2.7V ~ 5.5V
Operating Temperature Range	0°C ~ 70°C
Package Type	16-SOIC
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the TLV2544CDR is determined by strict equivalence in the following core parameters:

Resolution: 12 bits (non-negotiable for data integrity)
Channel Count: 4 single-ended inputs (functional requirement)
Sampling Rate: 200 kSPS (performance specification)
Architecture: SAR (conversion method)
Data Interface: SPI and DSP compatibility (communication protocol)
Configuration: MUX-S/H-ADC (integrated multiplexer with sample-and-hold)
Supply Voltage Compatibility: Overlapping analog and digital supply ranges

The ADC124S021CIMMX/NOPB qualifies as a manufacturer-recommended substitute. While it maintains identical resolution, channel count, sampling rate, architecture, and data interface specifications, it differs in package type (10-VSSOP versus 16-SOIC) and supply voltage range (2.7V ~ 5.25V versus 2.7V ~ 5.5V). These differences require PCB layout redesign and voltage margin verification but do not affect functional equivalence for the core ADC operation.

Parameter Comparison

Parameter	TLV2544CDR	ADC124S021CIMMX/NOPB	Compatibility Notes
Manufacturer	Texas Instruments	Texas Instruments	Same source
Resolution (Bits)	12	12	Equivalent
Number of Inputs	4	4	Equivalent
Input Type	Single Ended	Single Ended	Equivalent
Sampling Rate (kSPS)	200	200	Equivalent
Data Interface	SPI, DSP	SPI, DSP	Equivalent
Architecture	SAR	SAR	Equivalent
Configuration	MUX-S/H-ADC	MUX-S/H-ADC	Equivalent
Analog Supply Voltage Range	2.7V ~ 5.5V	2.7V ~ 5.25V	Substitute has narrower range; verify 5.5V operation not required
Digital Supply Voltage Range	2.7V ~ 5.5V	2.7V ~ 5.25V	Substitute has narrower range; verify 5.5V operation not required
Operating Temperature Range	0°C ~ 70°C	-40°C ~ 85°C	Substitute supports extended temperature range
Package Type	16-SOIC	10-VSSOP	Different package; PCB redesign required
Product Status	Last Time Buy	Active	Substitute is actively manufactured
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent

Engineering Selection Recommendations

The ADC124S021CIMMX/NOPB is the manufacturer-recommended substitute for the TLV2544CDR. Selection of this substitute is justified on the following engineering grounds:

Product Status: The TLV2544CDR is Last Time Buy, meaning future availability is not guaranteed. The ADC124S021CIMMX/NOPB maintains Active status with Texas Instruments, ensuring long-term supply chain stability.

Functional Equivalence: Both devices share identical core specifications: 12-bit resolution, 4-channel single-ended input, 200 kSPS sampling rate, SAR architecture, and SPI/DSP interface compatibility. These parameters are sufficient for functional substitution in data acquisition applications.

Compliance: Both parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for industrial and commercial applications.

Design Considerations: The substitute requires PCB layout modification due to package change from 16-SOIC to 10-VSSOP. The narrower supply voltage range (2.7V ~ 5.25V versus 2.7V ~ 5.5V) requires verification that system supply voltages do not exceed 5.25V. The extended operating temperature range (-40°C ~ 85°C) of the substitute provides additional margin beyond the original part's 0°C ~ 70°C specification.

Frequently Asked Questions (FAQ)

Q: Can the ADC124S021CIMMX/NOPB be used as a direct pin-for-pin replacement for the TLV2544CDR?

A: No. The TLV2544CDR uses a 16-SOIC package while the ADC124S021CIMMX/NOPB uses a 10-VSSOP package. Pin counts and pinout configurations differ, requiring PCB redesign and firmware verification of the new pin assignments.

Q: What is the impact of the narrower supply voltage range on the ADC124S021CIMMX/NOPB?

A: The substitute operates from 2.7V to 5.25V, compared to the original part's 2.7V to 5.5V range. If your system supplies exactly 5.5V, the substitute cannot be used without voltage regulation. For systems operating at 5.0V or lower, this difference has no practical impact.

Q: Are the data interface protocols identical between these two parts?

A: Yes. Both devices support SPI and DSP data interfaces with identical configuration (MUX-S/H-ADC). Firmware communication protocols remain compatible after accounting for the physical pinout changes.

Q: Does the extended temperature range of the substitute affect compatibility?

A: No. The ADC124S021CIMMX/NOPB's extended operating range (-40°C ~ 85°C) is a superset of the original part's range (0°C ~ 70°C). This provides additional design margin and is not a compatibility concern.

Q: What inventory considerations should be evaluated?

A: The TLV2544CDR has 3,538 units in stock (Last Time Buy status), while the ADC124S021CIMMX/NOPB has 1,776 units available. For new designs, the substitute is the recommended choice due to its Active product status and assured future availability.

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