TLV2556IPWR Equivalent & Substitute Parts

Part Overview

The TLV2556IPWR is a 12-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications requiring moderate sampling rates and multiple analog inputs. This device features 11 single-ended inputs with a SAR (Successive Approximation Register) architecture and SPI digital interface. The TLV2556IPWR 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 flexibility, and enable migration to active product lines where applicable.

Substiute Parts

TLV2556IPWR

Texas InstrumentsIn Stock: 5414TLV2556IPWR Datasheet

Current PartRFQ

ADS7952SBDBTR

Texas InstrumentsIn Stock: 1604ADS7952SBDBTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLV2556IPWR is determined by the following core parameters:

• Resolution: 12-bit ADC capability
• Architecture: SAR-based conversion
• Data Interface: SPI protocol compatibility
• Input Configuration: Single-ended analog inputs with multiplexer and sample-and-hold
• Supply Voltage Compatibility: Overlapping analog and digital supply ranges
• Compliance: ROHS3 compliance and EAR99 classification

The ADS7952SBDBTR qualifies as a substitute based on matching resolution, architecture, data interface, and input type. Differences in input count (12 vs. 11), sampling rate (1 MSPS vs. 200 kSPS), package form factor (38-TSSOP vs. 20-TSSOP), and operating temperature range represent design trade-offs that must be evaluated within specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The ADS7952SBDBTR is the designated manufacturer-recommended substitute for the TLV2556IPWR. Both devices maintain ROHS3 compliance and EAR99 classification, ensuring regulatory continuity. The ADS7952SBDBTR carries Active product status, providing long-term design support and supply availability compared to the Last Time Buy status of the TLV2556IPWR.

Key considerations for selection:

• Sampling Rate: The ADS7952SBDBTR operates at 1 MSPS, providing 5× higher throughput than the TLV2556IPWR's 200 kSPS. Applications requiring lower sampling rates will not require this additional performance.
• Input Count: The ADS7952SBDBTR provides 12 inputs versus 11 on the TLV2556IPWR. Designs utilizing all 11 channels of the original device will function identically; the additional input channel provides design flexibility.
• Package Footprint: The ADS7952SBDBTR uses a 38-TSSOP package compared to the 20-TSSOP of the TLV2556IPWR. PCB layout modifications are required.
• Temperature Range: The ADS7952SBDBTR supports -40°C to 125°C operation, extending the upper temperature limit by 40°C.
• Reference Configuration: The ADS7952SBDBTR supports external reference only, whereas the TLV2556IPWR supports both external and internal references. Applications relying on internal reference functionality require external reference implementation.
• Digital Supply Voltage: The ADS7952SBDBTR accepts digital supply as low as 1.7V, providing additional flexibility for low-power applications.

Frequently Asked Questions (FAQ)

Q: Can the ADS7952SBDBTR directly replace the TLV2556IPWR without design modifications?

A: Direct pin-for-pin replacement is not possible due to different package types (20-TSSOP vs. 38-TSSOP). PCB layout redesign is required. However, functional compatibility is maintained for applications using 11 or fewer input channels, SPI interface, and external reference configurations.

Q: What happens if my application requires internal voltage reference?

A: The ADS7952SBDBTR does not include an internal reference. Applications must implement external reference circuitry. The TLV2556IPWR's internal reference capability is not replicated in this substitute.

Q: Is the higher sampling rate of the ADS7952SBDBTR a concern for my application?

A: Higher sampling rate does not negatively impact applications designed for lower throughput. The ADS7952SBDBTR can be configured to operate at reduced sampling rates through firmware control. No performance degradation occurs when operating below maximum rated speed.

Q: Are there supply chain or availability differences between these parts?

A: The TLV2556IPWR is Last Time Buy status with limited future availability. The ADS7952SBDBTR is Active status with ongoing manufacturing and supply support from Texas Instruments.

Q: What are the compliance and regulatory implications of substitution?

A: Both devices maintain ROHS3 compliance and EAR99 classification. No regulatory re-qualification is required for substitution within these frameworks. MSL ratings differ (1 vs. 2), affecting moisture handling and storage requirements.

Q: Can I use the ADS7952SBDBTR's 12th input channel in my design?

A: Yes. The additional input channel is fully functional and can be utilized for expanded analog signal acquisition or left unconnected if not required by the application.