LM94021 MDA Equivalent & Substitute Parts

Part Overview

The LM94021 MDA is an analog temperature sensor manufactured by Texas Instruments, designed for local temperature measurement across a range of -50°C to 150°C. This component operates with a supply voltage of 1.5V to 5.5V and delivers analog voltage output with a resolution of 5.5 to 13.6mV/°C. The device is qualified to AEC-Q100 automotive standards and is RoHS3 compliant.

The LM94021 MDA is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this temperature sensing component.

Substiute Parts

LM94021 MDA

Texas InstrumentsIn Stock: 939LM94021 MDA Datasheet

Current PartRFQ

LM94021BIMG/NOPB

Texas InstrumentsIn Stock: 3132LM94021BIMG/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM94021 MDA is determined by strict alignment with the following electrical and mechanical parameters:

• Sensor Type & Function: Must be analog, local temperature sensor
• Temperature Range: Must cover -50°C to 150°C minimum
• Output Characteristics: Must provide analog voltage output with equivalent resolution (5.5 to 13.6mV/°C)
• Supply Voltage Compatibility: Must operate within 1.5V to 5.5V range
• Accuracy Specification: Must meet or exceed ±1.5°C at nominal conditions and ±2.7°C across operating range
• Mounting & Packaging: Must be surface mount compatible
• Compliance & Qualification: Must maintain AEC-Q100 automotive qualification and RoHS3 compliance status

The LM94021BIMG/NOPB qualifies as a direct substitute based on identical electrical specifications and maintained automotive-grade qualification.

Parameter Comparison

Engineering Selection Recommendations

The LM94021BIMG/NOPB is the qualified substitute for the LM94021 MDA. Both components share identical electrical specifications, temperature operating ranges, accuracy characteristics, and automotive-grade qualifications. The primary distinction is packaging format: the LM94021BIMG/NOPB is supplied in Tape & Reel (TR) configuration with SC-70-5 package, whereas the LM94021 MDA uses a Die package format.

Both parts maintain RoHS3 compliance and AEC-Q100 qualification status, ensuring continued compliance with automotive and environmental regulatory requirements. The substitution is electrically and functionally transparent for circuit-level integration.

Frequently Asked Questions (FAQ)

Q: Can the LM94021BIMG/NOPB directly replace the LM94021 MDA in existing designs?

A: Yes, from an electrical and functional perspective. Both components deliver identical analog voltage output, operate across the same temperature range (-50°C to 150°C), and maintain equivalent accuracy specifications. The primary consideration is package compatibility: the LM94021BIMG/NOPB uses SC-70-5 surface mount packaging, while the LM94021 MDA uses a Die package. PCB layout and assembly process compatibility must be verified.

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

A: No. Both the LM94021 MDA and LM94021BIMG/NOPB maintain identical AEC-Q100 automotive qualification and RoHS3 compliance status. Regulatory and quality requirements are equivalent.

Q: What is the significance of the packaging difference?

A: The LM94021 MDA is supplied as a bare die, while the LM94021BIMG/NOPB is packaged in SC-70-5 (5-pin TSSOP) surface mount format. This affects assembly methodology, handling requirements, and PCB footprint design. Designs using the die package require specialized die-attach and wire-bonding processes, whereas the SC-70-5 package is compatible with standard surface mount assembly equipment.

Q: Are both parts currently available?

A: Both components are classified as obsolete. Inventory availability should be confirmed with authorized distributors. The LM94021BIMG/NOPB currently shows higher inventory levels (3088 pcs) compared to the LM94021 MDA (900 pcs).

Q: What parameters must remain constant for substitution eligibility?

A: Temperature sensing range (-50°C to 150°C), analog voltage output type, supply voltage range (1.5V to 5.5V), resolution (5.5 to 13.6mV/°C), accuracy specifications (±1.5°C / ±2.7°C), and automotive-grade qualification (AEC-Q100) must all be maintained. Deviations in any of these parameters disqualify a component as a direct substitute.