Texas Instruments LM94023BITME/NOPB

Overview

LM94023BITME/NOPB from Texas Instruments is a precision analog-output CMOS temperature sensor with dual-gain selection (−5.5 mV/°C or −8.2 mV/°C), 1.5 V minimum supply operation, ±50 µA push-pull output drive, and ±1.5°C accuracy from −20°C to +40°C - deployed in battery-powered cell phones, wireless transceivers, and automotive cabin temperature monitoring.

For engineers reviewing the LM94023BITME/NOPB datasheet, LM94023BITME/NOPB pinout, LM94023BITME/NOPB application, or LM94023BITME/NOPB equivalent, this page delivers verified package mapping (DSBGA-4, YFQ0004), gain-select logic behavior, thermal error bounds across −50°C to +150°C, short-circuit protected Class AB output architecture, and real-world ADC interface design guidance.

Technical Context

The LM94023BITME/NOPB implements a rail-to-rail Class AB analog output stage enabling ±50 µA sourcing/sinking without external buffers - critical for driving SAR ADC sample capacitors directly. Its dual-gain transfer function is digitally selected via the GS pin (logic low = −5.5 mV/°C; logic high = −8.2 mV/°C), with input thresholds defined at VIL ≤ 0.5 V and VIH ≥ VDD − 0.5 V.

Operating from 1.5 V to 5.5 V, it achieves 5.4 µA typical quiescent current and maintains monotonic output voltage vs. temperature despite minor supply-induced output shift (≤ few mV) near VDD − VOUT ≈ 1.0 V - an effect already included in published accuracy specifications.

Key Specifications

Pinout & Package

LM94023BITME/NOPB uses a 0.8 mm × 0.8 mm, 4-bump DSBGA package (TI package code YFQ0004) with bottom-side thermal pad connected internally to GND for optimal thermal coupling to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM20BIM8/NOPB and TSYS01-D00-0000-001, LM94023BITME/NOPB uniquely balances ultra-low-voltage analog operation, programmable gain, and minimal footprint - making it the only option for space-constrained, single-cell battery systems requiring direct ADC interfacing without software overhead.

Availability

LM94023BITME/NOPB is available at Aetrix Electronics and suitable for cell phone thermal management, automotive cabin sensing, wireless transceiver monitoring, and industrial motor control cabinet applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM94023BITME/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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The LM94023BITME/NOPB belongs to TI's precision analog temperature sensor product line, engineered specifically for ultra-low-power, wide-range thermal monitoring in battery-operated and harsh-environment systems.

FAQ

What is the minimum supply voltage required for LM94023BITME/NOPB to operate across its full −50°C to +150°C range?

The LM94023BITME/NOPB requires a minimum 1.5 V supply to operate across its full −50°C to +150°C range - but only when the GS pin is held low (−5.5 mV/°C gain mode). At GS = high (−8.2 mV/°C), minimum supply rises to 1.9 V per datasheet Electrical Characteristics table. LM94023BITME/NOPB achieves this with just 5.4 µA quiescent current, enabling direct single-cell battery use.

How does the GS pin affect LM94023BITME/NOPB accuracy and output voltage range?

The GS pin selects between two calibrated gain slopes: −5.5 mV/°C (GS = 0) yields 1299 mV at −50°C and 183 mV at +150°C; −8.2 mV/°C (GS = 1) yields 1955 mV at −50°C and 301 mV at +150°C. Accuracy remains ±1.5°C (−20°C to +40°C) in both modes, but full-range error widens to ±2.7°C - LM94023BITME/NOPB's Transfer Table provides exact mV values per °C for both configurations.

Can LM94023BITME/NOPB drive an ADC input directly without external components?

Yes - LM94023BITME/NOPB's ±50 µA Class AB push-pull output can directly drive typical microcontroller SAR ADC sampling capacitors (e.g., 10–20 pF) without series resistance or buffer op-amps. Its 1100 pF maximum load capacitance rating and fast 0.7 ms power-on time ensure stable acquisition. LM94023BITME/NOPB is explicitly designed for this use case, as shown in Figure 17 of the datasheet.

What is the thermal resistance (θJA) of LM94023BITME/NOPB, and how does it impact self-heating error?

LM94023BITME/NOPB has θJA = 122.6°C/W (DSBGA YFQ0004 package). Self-heating error is calculated as TJ = TA + θJA × (VDD × IQ + (VDD − VOUT) × IL). With 5.4 µA IQ and 2 µA load, error is <0.025°C - negligible for most applications. LM94023BITME/NOPB's GND pin is thermally tied to the die backside, so PCB copper area under the package significantly reduces effective θJA.

Is LM94023BITME/NOPB pin-compatible with the LM20 temperature sensor?

Yes - LM94023BITME/NOPB uses identical 4-pin DSBGA footprint and pinout (VDD, GND, VOUT, GS) as the LM20, with GS replacing the LM20's NC pin. The LM94023BITME/NOPB datasheet explicitly states "footprint compatible with the industry-standard LM20", enabling mechanical drop-in replacement. However, GS must be actively driven or tied to VDD/GND - floating is not allowed.