LM35DM Temperature Sensor Equivalent & Substitute Parts

Part Overview

The LM35DM is an analog temperature sensor manufactured by Texas Instruments, designed for local temperature measurement applications within the 0°C to 100°C range. This device outputs an analog voltage proportional to temperature at 10mV/°C and operates from a 4V to 30V supply. The LM35DM is classified as "Not For New Designs," indicating its legacy status in the product lifecycle. Finding equivalent and substitute parts is necessary for applications requiring continued support, inventory replenishment, or design flexibility when the primary part becomes unavailable.

Substiute Parts

LM35DM

Texas InstrumentsIn Stock: 3721LM35DM Datasheet

Current PartRFQ

LM35DM/NOPB

Texas InstrumentsIn Stock: 5266LM35DM/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM35DM is determined by strict equivalence across the following critical parameters:

• Sensor Type & Measurement Method: Analog, Local temperature sensing only
• Temperature Range: 0°C to 100°C operational window
• Output Characteristics: Analog voltage output at 10mV/°C
• Supply Voltage Compatibility: 4V to 30V operating range
• Accuracy Specification: ±1.5°C at 25°C test condition
• Package & Pinout: 8-SOIC surface mount package with identical mechanical dimensions
• Base Product Series: LM35 family designation

The LM35DM/NOPB variant meets all these criteria and qualifies as a direct substitute. Both parts share identical electrical performance, temperature sensing characteristics, and physical packaging, ensuring pin-for-pin and functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

The LM35DM and LM35DM/NOPB are functionally equivalent across all electrical and mechanical parameters. Selection between these parts should be based on regulatory and compliance requirements:

LM35DM/NOPB is the preferred substitute when ROHS3 compliance and REACH unaffected status are required for new applications or supply chain requirements. This variant eliminates lead and other restricted substances while maintaining identical sensor performance and package compatibility.

LM35DM remains suitable for legacy system maintenance and applications where RoHS compliance is not mandated. Both parts deliver identical temperature sensing accuracy, output linearity, and operational characteristics within the specified 0°C to 100°C range.

Both variants are surface mount components in 8-SOIC packaging and require identical PCB footprints and circuit design considerations. No circuit modifications are necessary when substituting between these parts.

Frequently Asked Questions (FAQ)

Q: Can LM35DM/NOPB be used as a direct replacement for LM35DM in existing designs?

A: Yes. Both parts are pin-for-pin compatible with identical electrical specifications, temperature sensing range, output characteristics, and 8-SOIC package dimensions. No circuit modifications are required.

Q: What is the difference between LM35DM and LM35DM/NOPB?

A: The primary differences are regulatory compliance status. LM35DM/NOPB is ROHS3 compliant and REACH unaffected, while LM35DM is RoHS non-compliant and REACH affected. Electrical performance and sensor characteristics are identical.

Q: Are there any package or pinout differences between these substitutes?

A: No. Both parts use the 8-SOIC (0.154", 3.90mm Width) surface mount package with identical pinout and mechanical dimensions. PCB footprints are interchangeable.

Q: What temperature range do these sensors support?

A: Both LM35DM and LM35DM/NOPB operate within the 0°C to 100°C local temperature sensing range with 10mV/°C output resolution and ±1.5°C accuracy at 25°C.

Q: What supply voltage is required for these temperature sensors?

A: Both parts operate from 4V to 30V supply voltage, providing flexibility for integration into various power supply architectures.

Q: Why is LM35DM marked as "Not For New Designs"?

A: This designation indicates the part is in legacy status. For new applications, Texas Instruments recommends evaluating current-generation temperature sensor alternatives. However, the part remains available for existing design support and maintenance.