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Texas Instruments LM94022BIMGX
- Part No.:
- LM94022BIMGX
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM94022BIMGX.pdf
- Description:
- SENSOR ANALOG -50C-150C SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,378
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Product details
Overview
LM94022BIMGX from Texas Instruments is a precision analog-output CMOS temperature sensor with selectable NTC gain (−5.5 to −13.6 mV/°C), ±1.5°C accuracy from −50°C to +150°C, 1.5–5.5 V supply operation, and SC70-5 package - used for battery-powered thermal monitoring in automotive ECUs and portable electronics.
For engineers reviewing the LM94022BIMGX datasheet, LM94022BIMGX pinout, LM94022BIMGX application, or LM94022BIMGX equivalent, this page delivers verified technical context, gain-select logic behavior, load regulation limits, short-circuit protected class-AB output, and real-world use cases in low-voltage thermal sensing systems.
Technical Context
The LM94022BIMGX uses stacked base-emitter junctions as its thermal sensing element, with GS1/GS0 logic inputs selecting one of four discrete gain configurations via internal diode stack count. Its class-AB output buffer provides ±50 µA source/sink capability and drives capacitive loads up to 1100 pF without external compensation.
Gain selection directly determines output slope (−5.5, −8.2, −10.9, or −13.6 mV/°C) and minimum operating voltage: −5.5 mV/°C enables full −50°C to +150°C range at 1.5 V, while higher gains require ≥2.4 V supply. Output voltage shift due to rail-to-rail buffer behavior is characterized and included in accuracy specs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5 V to 5.5 V - supports single-cell Li-ion, alkaline, or coin-cell battery operation without regulation. |
| Temperature Accuracy | ±1.5°C over 20°C to 40°C - enables high-fidelity thermal feedback in critical zones like battery packs or power stages. |
| Selectable Gain Options | −5.5 / −8.2 / −10.9 / −13.6 mV/°C - allows trade-off between resolution, noise immunity, and minimum supply voltage. |
| Output Drive Capability | ±50 µA source/sink - sufficient to drive ADC sample-and-hold inputs without external buffering. |
| Quiescent Supply Current | 5.4 µA - extends battery life in always-on thermal monitoring applications beyond 10 years on CR2032. |
| Capacitive Load Tolerance | Up to 1100 pF - eliminates need for series resistor in most microcontroller ADC interface designs. |
| Operating Temperature Range | −50°C to +150°C - qualified for under-hood automotive, industrial motor control, and high-reliability embedded systems. |
Pinout & Package
LM94022BIMGX is housed in a 5-pin SC70 package (2.00 mm × 1.25 mm body size), optimized for space-constrained PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GS1 (Pin 5) | Logic input | MSB of 2-bit gain select; tied high/low or driven by MCU GPIO to configure output slope. |
| GS0 (Pin 1) | Logic input | LSB of 2-bit gain select; no pull-up/down resistors required - direct rail connection supported. |
| OUT (Pin 3) | Analog output | Class-AB buffered voltage output inversely proportional to temperature; short-circuit protected. |
| VDD (Pin 4) | Power supply | Positive supply input; accepts 1.5–5.5 V with <200 µV/V line regulation. |
| GND (Pin 2) | Ground reference | Power and signal return path; must be low-impedance for accuracy below ±2°C. |
Key Features
| Feature | Design Value |
|---|---|
| Four-gain digital selection | GS1/GS0 logic inputs enable runtime gain switching - supports adaptive resolution during system diagnostics or thermal ramp testing. |
| Low-voltage operation | Functional at 1.5 V with −5.5 mV/°C gain - enables direct integration into energy-harvesting or ultra-low-power sensor nodes. |
| Short-circuit protected output | Withstands indefinite output short to GND or VDD - eliminates need for external current-limiting components in harsh environments. |
| Footprint compatibility | Pinout and SC70-5 footprint match industry-standard LM20 - allows drop-in replacement in legacy thermal monitoring designs. |
| Parabolic transfer function modeling | Accurate polynomial coefficients provided for each gain setting - enables software linearization with <0.1°C residual error over full range. |
Applications
| Automotive Cabin Climate Control | Battery Pack Thermal Monitoring |
|---|---|
Use Scenario: Real-time cabin air temperature measurement for HVAC actuator feedback in passenger vehicles. IC Role / Device Role / Timing Role: Analog temperature sensor providing continuous voltage output to MCU ADC with 10-bit+ effective resolution. Use Value: ±1.5°C accuracy at 25°C ensures precise setpoint tracking; SC70 size minimizes PCB area in tight dashboard modules. |
Use Scenario: Cell-level temperature sensing in 12S lithium-ion battery packs for EVs and ESS. IC Role / Device Role / Timing Role: High-accuracy thermal monitor interfacing directly to battery management system (BMS) ADC with minimal external components. Use Value: −50°C to +150°C range covers cold-start to fast-charge conditions; 5.4 µA quiescent current preserves standby battery life. |
| Wireless Transceiver Thermal Throttling | Industrial Motor Driver Overtemperature Protection |
Use Scenario: On-die temperature monitoring for PA bias adjustment in 5G mmWave front-end modules. IC Role / Device Role / Timing Role: Fast-response analog sensor feeding closed-loop thermal compensation circuitry in RF subsystems. Use Value: Class-AB output drives ADC sampling capacitor without droop; −13.6 mV/°C gain maximizes SNR against quantization noise. |
Use Scenario: IGBT junction temperature proxy sensing in servo drives and variable-frequency inverters. IC Role / Device Role / Timing Role: Isolated thermal sensor mounted on heatsink, reporting to controller for derating and fault shutdown. Use Value: AEC-Q100 Grade 0 qualification ensures reliability at 150°C ambient; short-circuit protection prevents latch-up during fault transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog-output temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMT84DBVR | TO-92 package; fixed −10 mV/°C gain; 1.8–5.5 V supply; ±2.7°C accuracy over −50°C to +150°C. | Requires through-hole assembly; lacks gain select flexibility; lower resolution than LM94022BIMGX at −13.6 mV/°C. | Choose when board space permits TO-92 and gain programmability is unnecessary. |
| LM20BIM7X | SC70-5 package; fixed −11.9 mV/°C gain; 2.4–5.5 V supply; ±3.5°C accuracy over −50°C to +125°C. | No gain selection; narrower temp range and lower accuracy; not rated for >125°C operation. | Choose only for cost-sensitive, non-automotive applications where ±3.5°C tolerance is acceptable. |
Compared with LMT84DBVR and LM20BIM7X, LM94022BIMGX offers superior accuracy (±1.5°C vs. ±2.7°C/±3.5°C), wider temperature range (+150°C vs. +125°C), and unique 4-gain configurability - enabling optimized resolution, noise rejection, and low-voltage operation across diverse thermal monitoring architectures.
Availability
LM94022BIMGX is available at Aetrix Electronics and suitable for automotive climate control, battery management, wireless transceiver thermal throttling, and industrial motor driver overtemperature protection requiring stable component supply and long-term lifecycle support.
Supply support for LM94022BIMGX 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 company specializing in analog and embedded processing technologies, with leadership in precision sensing, power management, and automotive-grade ICs.
The LM94022BIMGX belongs to TI's high-accuracy analog temperature sensor product line, designed specifically for battery-powered, space-constrained, and automotive-grade thermal monitoring applications demanding wide temperature range and configurable sensitivity.
FAQ
What is the minimum supply voltage required for LM94022BIMGX to operate across its full −50°C to +150°C range?
The LM94022BIMGX requires only 1.5 V when configured for −5.5 mV/°C gain (GS1 = 0, GS0 = 0). At higher gains (e.g., −13.6 mV/°C), minimum supply rises to 3.0 V. This scalability allows system designers to match supply constraints with resolution needs - LM94022BIMGX maintains full-range functionality down to 1.5 V in low-gain mode.
How does the LM94022BIMGX handle capacitive loading on its OUT pin?
The LM94022BIMGX drives capacitive loads ≤1100 pF directly without external compensation - sufficient for most microcontroller ADC sampling capacitors. For loads >1100 pF (e.g., long traces or multiple inputs), a series resistor (e.g., 800 Ω for 1 µF) is recommended per TI's Figure 14. LM94022BIMGX's class-AB output ensures stability without oscillation under these conditions.
Can the gain select pins (GS1/GS0) of LM94022BIMGX be left floating?
No - GS1 and GS0 must be actively driven to a defined logic level (VDD or GND) or controlled by a digital output. Floating inputs may cause undefined gain selection and erratic output voltage. TI explicitly states these pins can be tied directly to rails without pull resistors, making them robust for GPIO-driven configuration or static hardware setup in LM94022BIMGX applications.
Is LM94022BIMGX suitable for automotive applications, and what qualification does it hold?
Yes - LM94022BIMGX is AEC-Q100 Grade 0 qualified (−40°C to +150°C ambient), manufactured on an automotive-grade flow. It meets stringent reliability, ESD (±2500 V HBM), and thermal performance requirements for under-hood and cabin modules. The LM94022BIMGX datasheet specifies guaranteed operation up to +150°C junction temperature, confirming suitability for automotive thermal sensing.
What is the output voltage shift behavior of LM94022BIMGX, and is it accounted for in accuracy specs?
LM94022BIMGX exhibits a small, monotonic output voltage shift (a few mV) when VDD – VOUT ≈ 1 V, due to rail-to-rail buffer characteristics. This shift occurs over ~5–20°C and is fully characterized. Crucially, all published accuracy specifications (e.g., ±1.5°C) include this shift - no additional derating is needed when using LM94022BIMGX within its recommended operating conditions.
LM94022BIMGX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Sensor Type:
- Analog, Local
- Sensing Temperature - Local:
- -50°C ~ 150°C
- Sensing Temperature - Remote:
- -
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 1.5V ~ 5.5V
- Resolution:
- 5.5 ~ 13.6mV/°C
- Features:
- Programmable Resolution
- Accuracy - Highest (Lowest):
- ±1.5°C (±2.7°C)
- Test Condition:
- 20°C ~ 40°C (0°C ~ 150°C)
- Operating Temperature:
- -50°C ~ 150°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SC-70-5
LM94022BIMGX FAQ
1.How can I place an order for LM94022BIMGX through Aetrix?
Please submit a Request for Quotation (RFQ) for LM94022BIMGX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM94022BIMGX reliable?
The price and inventory of LM94022BIMGX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM94022BIMGX is usually 5 days.
3.What payment methods are accepted for LM94022BIMGX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM94022BIMGX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM94022BIMGX?
LM94022BIMGX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM94022BIMGX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM94022BIMGX?
For technical support, including LM94022BIMGX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM94022BIMGX requirements.
6.How does Aetrix verify that LM94022BIMGX is sourced from the original manufacturer or authorized distributors?
All LM94022BIMGX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM94022BIMGX meets industry standards.
7.What is the process for return or replacement of LM94022BIMGX?
All LM94022BIMGX units undergo pre-shipment inspection (PSI). If there is an issue with LM94022BIMGX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM94022BIMGX part is unused and in its original packaging.
Return procedure for LM94022BIMGX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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