TLV1544IPWR Equivalent & Substitute Parts

Part Overview

The TLV1544IPWR is a 10-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications requiring 4 single-ended analog inputs with SPI digital interface. The device operates across a wide supply voltage range of 2.7V to 5.5V and maintains performance across industrial temperature ranges from -40°C to 85°C. This part is currently in Last Time Buy status, indicating production discontinuation. Identifying qualified substitute components is essential for design continuity and long-term product support.

Substiute Parts

TLV1544IPWR

Texas InstrumentsIn Stock: 4004TLV1544IPWR Datasheet

Current PartRFQ

ADC104S021CIMMX/NOPB

Texas InstrumentsIn Stock: 4399ADC104S021CIMMX/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLV1544IPWR is determined by the following core parameters:

• Resolution: Must be 10 bits
• Number of Inputs: Must be 4 single-ended channels
• Data Interface: Must support SPI protocol
• Architecture: Must be SAR-based
• Supply Voltage Compatibility: Analog and digital supply ranges must overlap with or encompass the original specification
• Operating Temperature Range: Must support -40°C to 85°C minimum
• Compliance: RoHS3 compliance required

The ADC104S021CIMMX/NOPB meets these core substitution criteria while offering enhanced performance characteristics and improved product lifecycle status.

Parameter Comparison

Engineering Selection Recommendations

The ADC104S021CIMMX/NOPB is a qualified substitute for the TLV1544IPWR based on the following engineering criteria:

Functional Compatibility: Both devices share identical core specifications—10-bit resolution, 4 single-ended inputs, SAR architecture, and SPI interface—ensuring functional equivalence in data acquisition applications.

Product Lifecycle: The ADC104S021CIMMX/NOPB maintains Active product status, providing long-term availability and supply chain stability compared to the Last Time Buy status of the TLV1544IPWR.

Compliance and Certification: Both parts are ROHS3 compliant. The ADC104S021CIMMX/NOPB carries AEC-Q100 automotive qualification, providing additional reliability assurance for applications requiring automotive-grade components.

Performance Enhancement: The substitute part offers 200 kSPS sampling rate versus 87 kSPS, providing improved performance headroom without compromising compatibility.

Design Considerations: The package change from 16-TSSOP to 10-VSSOP requires PCB layout modification. The reference voltage implementation differs—the substitute uses supply-referenced conversion versus external reference—necessitating circuit design review for applications dependent on external reference precision.

Frequently Asked Questions (FAQ)

Q: Can the ADC104S021CIMMX/NOPB directly replace the TLV1544IPWR without circuit modifications?

A: Functional replacement is possible due to matching resolution, input count, and SPI interface. However, the reference voltage architecture differs (supply-referenced versus external reference), requiring evaluation of your application's reference voltage requirements. The package change from 16-TSSOP to 10-VSSOP mandates PCB layout redesign.

Q: What is the impact of the different supply voltage ranges?

A: The TLV1544IPWR supports 2.7V to 5.5V, while the ADC104S021CIMMX/NOPB supports 2.7V to 5.25V. Applications operating above 5.25V require the original part or alternative solutions. Most standard 3.3V and 5V systems fall within both ranges.

Q: Why does the substitute have a higher sampling rate?

A: The ADC104S021CIMMX/NOPB operates at 200 kSPS compared to 87 kSPS. This enhanced performance is backward compatible—applications designed for 87 kSPS operation will function correctly at the higher rate without modification.

Q: Is the package change from 16-TSSOP to 10-VSSOP significant?

A: Yes. The 10-VSSOP package is physically smaller and has different pin assignments. PCB layout, routing, and component placement must be redesigned. Verify pin-to-pin compatibility before implementation.

Q: What does AEC-Q100 qualification mean for non-automotive applications?

A: AEC-Q100 qualification indicates the part meets automotive reliability and testing standards. This certification provides additional assurance of component quality and consistency, beneficial for any application requiring high reliability, regardless of automotive use.

Q: Are there other substitute options available?

A: The ADC104S021CIMMX/NOPB is the manufacturer-recommended substitute. Texas Instruments lists additional variants (ADC104S021QIMM/NOPB, ADC104S021CIMM/NOPB) with different packaging or qualification levels that may also be evaluated based on specific application requirements.