TLV1544IDR Equivalent & Substitute Parts

Part Overview

The TLV1544IDR is a 10-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications requiring single-ended input conversion. This device features a Successive Approximation Register (SAR) architecture with 4 input channels, SPI data interface, and operates across a supply voltage range of 2.7V to 5.5V. The TLV1544IDR is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure continued design support, maintain supply chain continuity, and leverage active product alternatives with enhanced specifications.

Substiute Parts

TLV1544IDR

Texas InstrumentsIn Stock: 1248TLV1544IDR Datasheet

Current PartRFQ

ADC104S021CIMMX/NOPB

Texas InstrumentsIn Stock: 4399ADC104S021CIMMX/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLV1544IDR is determined by strict alignment of core electrical and mechanical parameters. The following criteria establish valid substitution:

Core Substitution Parameters:

• Resolution: 10-bit (fixed requirement)
• Number of Input Channels: 4 (fixed requirement)
• Input Configuration: Single Ended (fixed requirement)
• Data Interface: SPI compatible (minimum requirement)
• Architecture: SAR (fixed requirement)
• Supply Voltage Range: Must encompass or overlap with 2.7V ~ 5.5V
• Operating Temperature Range: Must encompass or overlap with -40°C ~ 85°C
• Mounting Type: Surface Mount (fixed requirement)
• RoHS Compliance: ROHS3 Compliant (fixed requirement)

Flexible Parameters (allowing substitution with different values):

• Sampling Rate: May exceed 87k (higher performance acceptable)
• Package Type: May differ (16-SOIC to alternative surface mount packages)
• Reference Type: May differ (External to Supply reference)
• Packaging Format: May differ (Tape & Reel to Cut Tape or alternative formats)

The ADC104S021CIMMX/NOPB meets all core substitution criteria while offering enhanced sampling rate (200k vs. 87k) and alternative packaging in 10-VSSOP format.

Parameter Comparison

Engineering Selection Recommendations

The ADC104S021CIMMX/NOPB is the designated manufacturer-recommended substitute for the TLV1544IDR. Selection of this alternative is supported by the following engineering factors:

Product Status: The TLV1544IDR is Last Time Buy, while the ADC104S021CIMMX/NOPB is Active, ensuring long-term availability and continued manufacturing support.

Compliance & Certification: Both devices maintain ROHS3 compliance and REACH unaffected status. The ADC104S021CIMMX/NOPB carries AEC-Q100 automotive qualification, providing additional reliability assurance for applications requiring automotive-grade components.

Performance Enhancement: The ADC104S021CIMMX/NOPB provides 200k sampling rate versus 87k, delivering improved conversion speed without compromising resolution or core functionality.

Supply Voltage Compatibility: The substitute operates within 2.7V ~ 5.25V, which overlaps the original 2.7V ~ 5.5V range across the standard operating window for most applications. Design verification is required for systems operating above 5.25V.

Package Transition: Migration from 16-SOIC to 10-VSSOP requires PCB layout redesign. The smaller footprint (0.118" vs. 0.154" width) may provide space optimization benefits in compact designs.

Frequently Asked Questions (FAQ)

Q: Can the ADC104S021CIMMX/NOPB directly replace the TLV1544IDR without design changes?

A: Direct pin-for-pin replacement is not possible due to different package types (16-SOIC vs. 10-VSSOP). PCB layout and routing must be redesigned. However, the electrical interface (SPI protocol, 10-bit resolution, 4-channel configuration) is compatible, requiring only firmware verification and signal integrity validation.

Q: What is the impact of the reduced supply voltage range (5.25V vs. 5.5V maximum)?

A: The ADC104S021CIMMX/NOPB maximum supply voltage is 5.25V compared to 5.5V for the TLV1544IDR. Applications operating at or above 5.25V require voltage regulation or alternative component selection. Standard 5V systems operate within specification for both devices.

Q: Does the higher sampling rate (200k vs. 87k) require firmware modifications?

A: The increased sampling rate is a performance enhancement and does not mandate firmware changes. Existing firmware configured for 87k sampling will function with the substitute. Applications may optionally leverage the higher conversion speed for improved temporal resolution.

Q: Are there data interface differences between SPI and DSP modes on the substitute?

A: The ADC104S021CIMMX/NOPB supports both SPI and DSP interfaces. Existing SPI implementations remain fully compatible. DSP mode is an additional feature not present on the TLV1544IDR and is optional for new designs.

Q: What is the inventory status for each part?

A: TLV1544IDR: 1232 pcs available (Last Time Buy status). ADC104S021CIMMX/NOPB: 4291 pcs available (Active product). The substitute offers significantly higher stock availability.

Q: Is the ADC104S021CIMMX/NOPB suitable for automotive applications?

A: Yes. The ADC104S021CIMMX/NOPB carries AEC-Q100 automotive qualification and Grade designation, making it suitable for automotive-grade applications. The TLV1544IDR does not carry automotive qualification.