TLV1544CPW Equivalent & Substitute Parts

Part Overview

The TLV1544CPW 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 interface. The device operates across a supply voltage range of 2.7V to 5.5V and features a 87 kSPS sampling rate with SAR (Successive Approximation Register) architecture.

The TLV1544CPW is classified as Last Time Buy, indicating that Texas Instruments has discontinued this product line. Finding equivalent substitute parts is necessary to ensure continued availability for new designs, production continuity, and long-term system support.

Substiute Parts

TLV1544CPW

Texas InstrumentsIn Stock: 903TLV1544CPW Datasheet

Current PartRFQ

ADC104S021CIMMX/NOPB

Texas InstrumentsIn Stock: 4399ADC104S021CIMMX/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLV1544CPW is determined by the following critical parameters:

• Resolution and Input Configuration: Both the main part and substitute must maintain 10-bit resolution with 4 single-ended analog inputs to preserve signal acquisition capability.
• Data Interface: SPI compatibility is required for direct integration with existing control circuitry.
• Architecture: SAR architecture ensures equivalent conversion methodology and timing characteristics.
• Supply Voltage Compatibility: The substitute must operate within overlapping supply voltage ranges to function in the same power distribution system.
• Package Form Factor: Physical dimensions and pin count must be compatible with the existing PCB layout, though package variants may differ.

The ADC104S021CIMMX/NOPB qualifies as a direct substitute based on these parameters while offering enhanced specifications in sampling rate and extended operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The ADC104S021CIMMX/NOPB is the qualified substitute for the TLV1544CPW based on the following engineering criteria:

Functional Equivalence: Both devices maintain identical 10-bit resolution, 4-channel single-ended input configuration, and SAR architecture, ensuring equivalent data acquisition performance for applications within the specified sampling rate requirements.

Product Status and Availability: The ADC104S021CIMMX/NOPB carries Active product status with higher inventory availability (4291 pcs), providing long-term supply security compared to the Last Time Buy status of the TLV1544CPW.

Compliance and Certification: Both parts are ROHS3 compliant and REACH unaffected. The ADC104S021CIMMX/NOPB includes AEC-Q100 automotive qualification, extending its applicability to automotive-grade applications.

Supply Voltage Consideration: The substitute operates within 2.7V to 5.25V, which overlaps with the main part's 2.7V to 5.5V range. Applications requiring operation above 5.25V must verify compatibility with the substitute's upper voltage limit.

Package Transition: The substitute uses 10-VSSOP packaging versus the main part's 16-TSSOP. This represents a significant physical change requiring PCB layout redesign. Pin-to-pin functional mapping must be verified during integration.

Frequently Asked Questions (FAQ)

Q: Can the ADC104S021CIMMX/NOPB directly replace the TLV1544CPW without design changes?

A: The ADC104S021CIMMX/NOPB provides functional equivalence in data acquisition capability but requires PCB layout redesign due to different package types (10-VSSOP versus 16-TSSOP). Pin assignments and signal routing must be re-evaluated.

Q: What is the impact of the higher sampling rate (200 kSPS vs. 87 kSPS) on system design?

A: The substitute's higher sampling rate is a performance enhancement that does not negatively impact designs. Applications requiring only 87 kSPS operation will function correctly with the substitute. No firmware or timing adjustments are necessary.

Q: Are there supply voltage limitations when using the ADC104S021CIMMX/NOPB?

A: The substitute's maximum supply voltage is 5.25V compared to the main part's 5.5V. Applications operating at voltages between 5.25V and 5.5V must implement voltage regulation or select an alternative substitute to maintain specification compliance.

Q: Does the ADC104S021CIMMX/NOPB support the same SPI interface protocol?

A: Yes, both devices support SPI data interface. The substitute additionally supports DSP interface, providing expanded communication options. Existing SPI implementations will function without modification.

Q: What are the temperature range implications of the substitute?

A: The ADC104S021CIMMX/NOPB operates from -40°C to 85°C, extending the lower operating limit by 40°C compared to the main part's 0°C to 70°C range. This enhancement supports wider environmental applications without design modification.