TLV1508IPW Equivalent & Substitute Parts

Part Overview

The TLV1508IPW is a 10-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications requiring single-ended input processing. This device features a Successive Approximation Register (SAR) architecture with 4 input channels, a 200 kSPS sampling rate, and SPI digital interface. The part is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this component.

Substiute Parts

TLV1508IPW

Texas InstrumentsIn Stock: 1385TLV1508IPW Datasheet

Current PartRFQ

ADS7956SDBTR

Texas InstrumentsIn Stock: 1809ADS7956SDBTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLV1508IPW is determined by the following critical parameters that must remain compatible with the original design:

Core Functional Parameters:

• Resolution: 10-bit ADC capability
• Data Interface: SPI protocol compatibility
• Architecture: SAR-based conversion
• Input Configuration: Single-ended input processing
• Supply Voltage Ranges: Analog and digital supply compatibility within 2.7V minimum and 5.5V maximum envelope

Physical & Environmental Parameters:

• Package Type: Surface mount TSSOP family
• Operating Temperature Range: Minimum -40°C, maximum 85°C or higher
• RoHS Compliance: ROHS3 Compliant status

The ADS7956SDBTR qualifies as a substitute based on matching core functional parameters (10-bit resolution, SPI interface, SAR architecture, single-ended inputs) and compliance certifications. However, differences in channel count, sampling rate, package footprint, and supply voltage specifications must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The ADS7956SDBTR is available as an active product with ROHS3 compliance and REACH unaffected status, providing supply chain continuity compared to the TLV1508IPW Last Time Buy status. Both devices maintain ROHS3 Compliant certification and EAR99 export classification.

Design considerations for substitution include:

Compatibility Factors:

• Both devices utilize identical 10-bit SAR architecture with SPI interface, ensuring protocol-level compatibility
• Single-ended input configuration matches the original design requirement
• Surface mount TSSOP family packaging maintains manufacturing compatibility

Specification Differences Requiring Evaluation:

• The ADS7956SDBTR provides 12 input channels versus 4 channels in the TLV1508IPW; applications utilizing fewer channels can operate with unused inputs disabled
• Sampling rate increase from 200 kSPS to 1 MSPS provides performance headroom without degrading existing designs
• Package footprint change from 20-TSSOP to 38-TFSOP requires PCB layout modification
• Operating temperature range extension to 125°C provides broader environmental capability
• Analog supply voltage upper limit reduction from 5.5V to 5.25V requires verification against existing 5.5V supply designs
• Digital supply voltage lower limit reduction from 2.7V to 1.7V expands low-power application compatibility

Frequently Asked Questions (FAQ)

Q: Can the ADS7956SDBTR directly replace the TLV1508IPW without firmware changes?

A: The SPI interface and 10-bit resolution are compatible, but register maps and command structures must be verified against device datasheets. Firmware modifications may be required for proper device initialization and data acquisition sequencing.

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

A: The 38-TFSOP package has a larger footprint than the 20-TSSOP. PCB layout redesign is necessary, including trace routing and component placement adjustments. The wider package may affect board space constraints in compact designs.

Q: Are the supply voltage ranges compatible with existing power distribution designs?

A: The ADS7956SDBTR analog supply range (2.7V ~ 5.25V) is narrower than the TLV1508IPW (2.7V ~ 5.5V). Designs operating at 5.5V analog supply require verification or redesign. The digital supply range is broader (1.7V ~ 5.25V), supporting additional low-power configurations.

Q: How do the input channel differences affect system design?

A: The ADS7956SDBTR provides 12 channels compared to 4 in the TLV1508IPW. Existing designs using 4 channels can operate with the additional 8 channels unused or repurposed for system expansion without hardware modification.

Q: What compliance certifications apply to both devices?

A: Both the TLV1508IPW and ADS7956SDBTR are ROHS3 Compliant, REACH Unaffected, and classified as EAR99 for export purposes. Moisture Sensitivity Level differs: TLV1508IPW is MSL 1 (Unlimited), while ADS7956SDBTR is MSL 2 (1 Year), requiring appropriate handling and storage protocols.