TLV1504IPW Equivalent & Substitute Parts

Part Overview

The TLV1504IPW 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 2.7V to 5.5V supply range. The TLV1504IPW is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is essential for design continuity, long-term product support, and ensuring availability for new production runs or design revisions.

Key Parameters

Parameter	Value
Resolution	10 Bits
Number of Input Channels	4
Input Type	Single Ended
Sampling Rate	200 kSPS
Architecture	SAR (Successive Approximation Register)
Data Interface	SPI
Analog Supply Voltage	2.7V ~ 5.5V
Digital Supply Voltage	2.7V ~ 5.5V
Operating Temperature Range	-40°C ~ 85°C
Package Type	16-TSSOP
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TLV1504IPW is determined by the following core parameters:

Resolution and Input Configuration: Both the main part and substitute must maintain 10-bit resolution with 4 single-ended input channels to ensure functional compatibility at the system level.
Data Interface Protocol: SPI interface compatibility is mandatory for direct integration with existing microcontroller and FPGA designs without firmware modification.
SAR Architecture: The Successive Approximation Register architecture must be preserved to maintain conversion timing and power characteristics.
Supply Voltage Compatibility: The substitute part must operate within overlapping analog and digital supply voltage ranges to ensure compatibility with existing power distribution networks.
Package Footprint: While the TLV1504IPW uses 16-TSSOP packaging, substitute parts may use alternative TSSOP variants if pin-compatible or if design revision accommodates the change.

The ADS7954SDBTR qualifies as a manufacturer-recommended substitute based on these criteria, offering enhanced performance characteristics while maintaining core functional compatibility.

Parameter Comparison

Parameter	TLV1504IPW	ADS7954SDBTR	Compatibility Notes
Resolution	10 Bits	10 Bits	Matched
Number of Input Channels	4	4	Matched
Input Type	Single Ended	Single Ended	Matched
Sampling Rate	200 kSPS	1 MSPS	Substitute offers 5x higher sampling rate
Architecture	SAR	SAR	Matched
Data Interface	SPI	SPI	Matched
Analog Supply Voltage	2.7V ~ 5.5V	2.7V ~ 5.25V	Overlapping range; substitute has slightly lower upper limit
Digital Supply Voltage	2.7V ~ 5.5V	1.7V ~ 5.25V	Substitute supports lower digital supply voltage
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 125°C	Substitute offers extended upper temperature limit
Package Type	16-TSSOP	30-TSSOP	Different package; requires PCB layout revision
Product Status	Last Time Buy	Active	Substitute is in active production
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Matched

Engineering Selection Recommendations

For Direct Replacement (Same Product Status Continuation): The ADS7954SDBTR is the manufacturer-recommended substitute for the TLV1504IPW. Both devices are ROHS3 compliant and maintain equivalent core functionality. The ADS7954SDBTR is classified as Active product status, ensuring long-term availability and continued manufacturing support, whereas the TLV1504IPW is Last Time Buy.

Key Considerations for Implementation:

Package Transition: The ADS7954SDBTR uses 30-TSSOP packaging compared to the TLV1504IPW's 16-TSSOP. This requires PCB layout revision and is not a pin-for-pin replacement. Verify pinout compatibility and signal routing before design implementation.
Supply Voltage Range: The ADS7954SDBTR's analog supply upper limit is 5.25V versus 5.5V for the TLV1504IPW. Confirm that existing power supply designs operate within the 2.7V to 5.25V window.
Performance Enhancement: The ADS7954SDBTR offers 1 MSPS sampling rate compared to 200 kSPS, providing improved conversion speed without compromising resolution or channel count.
Temperature Range: The ADS7954SDBTR supports -40°C to 125°C operation, extending the upper temperature capability by 40°C.

Frequently Asked Questions (FAQ)

Q: Can the ADS7954SDBTR be used as a direct pin-for-pin replacement for the TLV1504IPW?

A: No. While both devices share the same resolution, channel count, and SPI interface, the ADS7954SDBTR uses 30-TSSOP packaging versus the TLV1504IPW's 16-TSSOP. A PCB layout revision is required. Verify pinout assignments and signal routing compatibility before implementation.

Q: What are the key functional differences between these two parts?

A: Both devices are 10-bit, 4-channel SAR ADCs with SPI interface. The primary differences are: (1) sampling rate—ADS7954SDBTR operates at 1 MSPS versus 200 kSPS; (2) operating temperature range—ADS7954SDBTR extends to 125°C; (3) digital supply voltage—ADS7954SDBTR supports 1.7V minimum; (4) packaging—30-TSSOP versus 16-TSSOP.

Q: Is the ADS7954SDBTR suitable for applications currently using the TLV1504IPW?

A: Yes, provided that the application can accommodate the package change and does not require the specific 5.5V analog supply upper limit. The ADS7954SDBTR's higher sampling rate and extended temperature range make it suitable for equivalent or enhanced performance requirements.

Q: What compliance certifications apply to both parts?

A: Both the TLV1504IPW and ADS7954SDBTR are ROHS3 compliant and REACH unaffected. Both carry EAR99 export classification and HTSUS code 8542.39.0001.

Q: Why is the TLV1504IPW classified as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued active production of this device. The ADS7954SDBTR, classified as Active, represents the current production alternative and is recommended for new designs and production continuity.

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