LM35DZ/LFT7 Equivalent & Substitute Parts

Part Overview

The LM35DZ/LFT7 is an analog temperature sensor manufactured by Texas Instruments, designed for local temperature measurement in the 0°C to 100°C range with a linear output of 10mV/°C. The device operates from a 4V to 30V supply and delivers ±1.5°C accuracy at 25°C test conditions. This part is classified as obsolete, making identification of active equivalent alternatives essential for ongoing production and maintenance applications. The LM35DZ/NOPB serves as the direct active substitute, maintaining identical electrical and mechanical specifications while offering improved availability.

Key Parameters

Parameter	Value
Sensor Type	Analog, Local
Sensing Temperature Range	0°C ~ 100°C
Output Type	Analog Voltage
Resolution	10mV/°C
Supply Voltage	4V ~ 30V
Accuracy	±1.5°C @ 25°C
Operating Temperature	0°C ~ 100°C
Package Type	TO-92-3 (TO-226AA)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LM35DZ/LFT7 is determined by strict equivalence across the following critical parameters:

Sensor type classification (Analog, Local)
Temperature sensing range (0°C ~ 100°C)
Output characteristic (Analog Voltage at 10mV/°C)
Supply voltage compatibility (4V ~ 30V)
Accuracy specification (±1.5°C @ 25°C)
Physical package format (TO-92-3)
Mounting methodology (Through Hole)
Regulatory compliance (ROHS3, REACH Unaffected, EAR99)

The LM35DZ/NOPB is classified as a direct manufacturer equivalent because it maintains identical electrical performance, mechanical dimensions, and regulatory certifications while differing only in product status (Active vs. Obsolete) and packaging designation (Bulk vs. standard).

Parameter Comparison

Parameter	LM35DZ/LFT7	LM35DZ/NOPB	Match Status
Manufacturer	Texas Instruments	Texas Instruments	Identical
Sensor Type	Analog, Local	Analog, Local	Identical
Sensing Temperature Range	0°C ~ 100°C	0°C ~ 100°C	Identical
Output Type	Analog Voltage	Analog Voltage	Identical
Resolution	10mV/°C	10mV/°C	Identical
Supply Voltage	4V ~ 30V	4V ~ 30V	Identical
Accuracy @ 25°C	±1.5°C	±1.5°C	Identical
Operating Temperature	0°C ~ 100°C	0°C ~ 100°C	Identical
Package / Case	TO-92-3 (TO-226AA)	TO-92-3 (TO-226AA)	Identical
Mounting Type	Through Hole	Through Hole	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
ECCN	EAR99	EAR99	Identical
Product Status	Obsolete	Active	Different
Packaging Designation	Standard	Bulk	Different

Engineering Selection Recommendations

The LM35DZ/NOPB is the direct equivalent for the obsolete LM35DZ/LFT7. Selection of the active substitute is based on:

Product status: LM35DZ/NOPB maintains Active status with assured long-term availability, whereas LM35DZ/LFT7 is classified as Obsolete
Regulatory compliance: Both parts maintain identical ROHS3 compliance, REACH Unaffected status, and EAR99 export classification
Electrical equivalence: All functional parameters, including temperature range, output resolution, supply voltage, and accuracy specifications, are identical
Physical compatibility: Both devices utilize the TO-92-3 package with through-hole mounting, ensuring direct PCB-level substitution without layout modification
Inventory availability: LM35DZ/NOPB demonstrates significantly higher stock levels (19,377 pcs vs. 739 pcs), supporting production continuity

Frequently Asked Questions (FAQ)

Q: Can LM35DZ/NOPB be used as a direct replacement for LM35DZ/LFT7 in existing designs?

A: Yes. The LM35DZ/NOPB is electrically and mechanically identical to the LM35DZ/LFT7. All electrical parameters, package dimensions, and pin configurations are equivalent. No circuit modifications or PCB redesign are required.

Q: What is the difference between the LM35DZ/LFT7 and LM35DZ/NOPB?

A: The primary differences are product status and packaging designation. LM35DZ/LFT7 is obsolete with limited stock availability. LM35DZ/NOPB is active with higher inventory levels and is supplied in bulk packaging. Electrical and mechanical specifications are identical.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts maintain identical ROHS3 compliance, REACH Unaffected status, and EAR99 export classification. No compliance-related restrictions apply to substitution.

Q: What is the temperature measurement range of these sensors?

A: Both the LM35DZ/LFT7 and LM35DZ/NOPB measure local temperature in the 0°C to 100°C range with a linear output of 10mV/°C and ±1.5°C accuracy at 25°C test conditions.

Q: Are these devices suitable for remote temperature sensing?

A: No. Both the LM35DZ/LFT7 and LM35DZ/NOPB are classified as local temperature sensors only. They measure the temperature at the device location and do not support remote temperature sensing.

Q: What supply voltage range is required for operation?

A: Both devices operate from 4V to 30V. This wide supply range accommodates single-supply and dual-supply configurations in various circuit topologies.

Q: Is the TO-92-3 package suitable for surface-mount applications?

A: No. The TO-92-3 package is a through-hole component. Both the LM35DZ/LFT7 and LM35DZ/NOPB require through-hole PCB mounting. Surface-mount alternatives are not available within this product line.

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