Texas Instruments LM60QIM3X/NOPB

Overview

LM60QIM3X/NOPB from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified analog temperature sensor in SOT-23 (DBZ) package, delivering linear 6.25 mV/°C output with 424 mV offset across −40°C to +125°C ambient range, ±4°C max accuracy over full range, and 70 μA max quiescent current (new chip). It enables single-supply negative-temperature sensing in battery-powered engine control units and powertrain modules.

For engineers reviewing the LM60QIM3X/NOPB datasheet, LM60QIM3X/NOPB pinout, LM60QIM3X/NOPB application, or LM60QIM3X/NOPB equivalent, key selection criteria include automotive-grade thermal accuracy, low self-heating (<0.1°C), SOT-23 footprint compatibility, and direct analog interface to 10-bit+ ADCs without external amplification or level-shifting.

Technical Context

The LM60QIM3X/NOPB implements a bipolar-based analog temperature-sensing core with factory-trimmed gain (6.25 mV/°C) and offset (424 mV at 0°C), enabling direct Celsius-to-voltage conversion without digital calibration. Its Class A emitter-follower output stage provides low DC impedance (800 Ω max) while sourcing >1 mA and sinking <1 μA.

Operating from 2.7 V to 10 V with intrinsic shutdown capability, it draws ≤70 μA (new chip) - limiting self-heating to ≤0.1°C in still air on standard PCBs. Thermal response time is dominated by package and board conduction, not internal circuitry, with typical τ ≈ 10–60 s depending on mounting.

Key Specifications

Pinout & Package

SOT-23 (DBZ) 3-pin package: 2.37 mm × 2.92 mm nominal footprint, thermally optimized with GND pin directly connected to die backside for minimal thermal resistance to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog temperature sensing applications.

Compared with LM60CIM3X/NOPB, the LM60QIM3X/NOPB adds AEC-Q100 Grade 1 compliance and functional safety documentation - critical for powertrain use - while TMP235DBVT trades qualification for higher accuracy and lower power, requiring ADC scaling changes due to different gain/offset.

Availability

LM60QIM3X/NOPB is available at Aetrix Electronics and suitable for automotive engine control units, battery management systems, and onboard charger thermal monitoring requiring stable component supply across extended product lifecycles.

Supply support for LM60QIM3X/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of automotive IC development experience and ISO/TS 16949-certified manufacturing.

The LM60-Q1 product line delivers AEC-Q100-qualified analog temperature sensors optimized for under-hood and powertrain applications where reliability, long-term drift stability, and single-supply operation are mandatory.

FAQ

What is the guaranteed accuracy of LM60QIM3X/NOPB over its full operating temperature range?

The LM60QIM3X/NOPB is specified for ±4°C maximum accuracy across the full −40°C to +125°C ambient temperature range, as verified per AEC-Q100 Grade 1 test conditions. This includes all process, voltage, and temperature variations - no derating required for automotive deployment. The LM60QIM3X/NOPB achieves this through factory trimming of both gain and offset during wafer sort.

Does LM60QIM3X/NOPB require external calibration for accurate temperature readings?

No, the LM60QIM3X/NOPB does not require external calibration. It ships fully calibrated with 6.25 mV/°C gain and 424 mV offset at 0°C, traceable to NIST standards. The linear transfer function VO = (6.25 mV/°C × T) + 424 mV allows direct Celsius calculation from ADC readings - eliminating firmware compensation tables or polynomial fitting for most applications.

Can LM60QIM3X/NOPB operate from a single-cell Li-ion battery?

Yes, the LM60QIM3X/NOPB operates from 2.7 V minimum supply voltage, making it compatible with discharged single-cell Li-ion batteries (2.7–4.2 V). Its 70 μA max quiescent current ensures minimal impact on battery runtime, and the 424 mV output offset enables valid readings even at −40°C without negative supply rails - ideal for portable diagnostic tools and EV battery service equipment.

How is thermal self-heating managed in LM60QIM3X/NOPB?

LM60QIM3X/NOPB limits self-heating to ≤0.1°C in still air on standard PCBs due to its ≤70 μA quiescent current and SOT-23 thermal design. The GND pin is internally bonded to the die backside, providing low-impedance thermal path to the PCB ground plane. Measured RθJA is 240.6°C/W (new chip), so at 3.3 V and 70 μA, power dissipation is just 231 μW - resulting in negligible junction-to-ambient rise.

Is LM60QIM3X/NOPB pin-compatible with other LM60 variants like LM60BIM3X/NOPB?

Yes, LM60QIM3X/NOPB is pin-compatible with LM60BIM3X/NOPB and LM60CIM3X/NOPB - all use identical SOT-23 (DBZ) 3-pin package with +VS, VOUT, and GND on pins 1, 2, and 3 respectively. However, LM60QIM3X/NOPB adds AEC-Q100 qualification, functional safety documentation, and tighter long-term drift (±0.2°C after 1000 h at 125°C), distinguishing it beyond pinout.