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Texas Instruments LM94022QBIMG/NOPB
- Part No.:
- LM94022QBIMG/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM94022QBIMG/NOPB.pdf
- Description:
- SENSOR ANALOG -50C-150C SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,670
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Product details
Overview
LM94022QBIMG/NOPB 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-V minimum supply operation, and SC70-5 package. It serves as a system-level thermal monitor in battery-powered automotive ECUs, wireless transceiver front-ends, and disk drive motor controllers.
For engineers reviewing the LM94022QBIMG/NOPB datasheet, LM94022QBIMG/NOPB pinout, LM94022QBIMG/NOPB application, or LM94022QBIMG/NOPB equivalent, this page delivers verified electrical specs, gain-select logic behavior, class-AB output drive capability, thermal error vs. temperature curves, and real-world ADC interface guidance - all confirmed against TI's SNIS140F Rev F datasheet.
Technical Context
The LM94022QBIMG/NOPB uses stacked base-emitter junctions as its sensing element, with GS1/GS0 logic inputs selecting one of four discrete gain configurations by controlling the number of active diodes in series. Its class-AB output stage provides ±50 µA sourcing/sinking current, enabling direct drive of SAR ADC sample capacitors without external buffering.
Gain selection directly determines full-scale voltage swing and operating voltage margin: −5.5 mV/°C allows full −50°C to +150°C range at VDD = 1.5 V, while −13.6 mV/°C requires ≥3.0 V for same range. 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 - enables single-cell Li-ion, alkaline, or coin-cell operation without regulation |
| Temperature Accuracy | ±1.5°C over 20°C–40°C - supports high-fidelity thermal feedback in critical zones like battery pack hot spots |
| Selectable Gain Options | −5.5, −8.2, −10.9, −13.6 mV/°C - tradeoff between low-voltage operability and ADC quantization noise immunity |
| Output Drive Capability | ±50 µA - sufficient to charge typical 10–20 pF SAR ADC input capacitance within 1 µs |
| Quiescent Current | 5.4 µA - extends battery life in always-on thermal monitoring nodes beyond 10 years on CR2032 |
| Capacitive Load Tolerance | ≤1100 pF - eliminates need for output RC filter in most microcontroller ADC interfaces |
| Operating Temperature Range | −50°C to +150°C - qualified for under-hood automotive, industrial motor, and power converter applications |
Pinout & Package
LM94022QBIMG/NOPB is housed in a 5-pin SC70 package (2.00 mm × 1.25 mm body size), optimized for space-constrained PCB layouts in portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GS0 (Pin 1) | Logic Input | LSB of gain select; tied low/high or driven by MCU GPIO to set slope (−5.5 to −13.6 mV/°C) |
| GND (Pin 2) | Power Ground | Reference return path for internal biasing and output stage; must be low-impedance connection |
| OUT (Pin 3) | Analog Output | Class-AB buffered voltage output inversely proportional to temperature; drives ADC inputs directly |
| VDD (Pin 4) | Positive Supply | Single 1.5–5.5 V rail; powers internal bandgap, gain control, and output amplifier |
| GS1 (Pin 5) | Logic Input | MSB of gain select; combined with GS0 to configure one of four factory-trimmed NTC slopes |
Key Features
| Feature | Design Value |
|---|---|
| Four digitally selectable NTC gains | Enables dynamic optimization: low gain for 1.5-V battery operation, high gain for noise-immune ADC sampling |
| Class-AB output stage | Delivers ±50 µA drive without external op-amp - reduces BOM count and layout area in compact systems |
| Short-circuit protected output | Withstands accidental OUT-to-GND shorts during assembly or field service without latch-up or degradation |
| Footprint compatibility with LM20 | Direct drop-in replacement for legacy LM20 designs - no PCB rework required when upgrading accuracy or gain flexibility |
| AEC-Q100 Grade 0 qualification | Validated for automotive ambient temperatures up to +150°C - suitable for engine control, transmission, and ADAS modules |
Applications
| Automotive Engine Control Unit | Wireless Transceiver Thermal Management |
|---|---|
Use Scenario: Real-time cylinder head temperature monitoring in gasoline direct injection engines. IC Role / Device Role / Timing Role: Analog temperature sensor providing continuous voltage output to ECU ADC for closed-loop spark timing correction. Use Value: ±1.5°C accuracy at 20°C–40°C ensures precise knock detection; −5.5 mV/°C gain maintains resolution down to 1.5-V backup battery supply. |
Use Scenario: PA die temperature tracking in LTE/5G RF front-end modules during burst transmission. IC Role / Device Role / Timing Role: High-speed thermal feedback source driving SAR ADC at 10 kSPS to trigger PA throttling before thermal shutdown. Use Value: ±50 µA output drive charges 15-pF ADC input in <1 µs; −13.6 mV/°C gain maximizes signal-to-quantization-noise ratio at 3.3-V supply. |
| Disk Drive Spindle Motor Controller | Portable Medical Device Battery Pack |
Use Scenario: Continuous thermal supervision of brushless DC spindle motor windings during sustained read/write operations. IC Role / Device Role / Timing Role: System-level thermal sensor interfacing to motor controller MCU via shared 10-bit ADC channel. Use Value: SC70-5 footprint fits tight space near motor driver IC; 5.4 µA quiescent current minimizes standby drain on 3.7-V Li-ion pack. |
Use Scenario: Cell-level temperature monitoring in wearable ECG patch battery packs with coin-cell backup. IC Role / Device Role / Timing Role: Low-voltage analog sensor supplying thermal data to ultra-low-power BLE SoC during sleep/wake cycles. Use Value: Operates at 1.5 V from CR2032; −5.5 mV/°C gain preserves 12-bit effective resolution across −20°C to +60°C clinical range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMT86DBVR | Fixed −10.9 mV/°C gain; no digital gain select pins; 1.8–5.5 V supply range | Cannot adapt gain dynamically; requires ≥1.8 V - unsuitable for 1.5-V coin-cell use cases | Choose LMT86DBVR only if fixed gain and higher supply voltage simplify design and reduce GPIO usage. |
| LM20BIM7X/NOPB | Fixed −11.9 mV/°C gain; SC70-5; ±2.5°C accuracy over −40°C to +125°C; no gain select | Lower accuracy and narrower temp range; lacks AEC-Q100 qualification; not automotive-grade | LM20BIM7X/NOPB is viable for cost-sensitive consumer electronics but cannot replace LM94022QBIMG/NOPB in automotive or high-accuracy industrial roles. |
Compared with LMT86DBVR and LM20BIM7X/NOPB, LM94022QBIMG/NOPB uniquely combines programmable gain, 1.5-V operation, and AEC-Q100 Grade 0 qualification - making it the only option for automotive thermal monitoring where supply voltage varies across battery states and gain must adapt to ADC resolution constraints.
Availability
LM94022QBIMG/NOPB is available at Aetrix Electronics and suitable for automotive engine control units, wireless transceiver thermal management, and disk drive spindle motor controllers requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM94022QBIMG/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 company specializing in analog and embedded processing technologies, with leadership in precision sensing, power management, and automotive electronics.
The LM94022QBIMG/NOPB belongs to TI's high-accuracy analog temperature sensor product line, designed specifically for automotive, industrial, and portable systems demanding wide temperature range, low-voltage operation, and configurable sensitivity.
FAQ
What is the minimum supply voltage required for LM94022QBIMG/NOPB to operate across its full −50°C to +150°C range?
The LM94022QBIMG/NOPB requires a minimum supply voltage of 1.5 V to cover the full −50°C to +150°C range - but only when configured for the lowest gain setting (GS1 = 0, GS0 = 0, −5.5 mV/°C). At higher gains (e.g., −13.6 mV/°C), the minimum VDD rises to 3.0 V for full-range operation. This relationship is explicitly defined in Section 6.3 (Recommended Operating Conditions) of the SNIS140F datasheet.
How does the LM94022QBIMG/NOPB achieve ±1.5°C accuracy over 20°C to 40°C while maintaining wider tolerance at extremes?
The LM94022QBIMG/NOPB achieves ±1.5°C accuracy from 20°C to 40°C through factory trimming of its stacked thermal diode array and class-AB output amplifier offset. Accuracy degrades to ±2.7°C over −50°C to +150°C due to inherent parabolic curvature in the transfer function - a characteristic fully documented in Table 2 and Figure 1 of the datasheet. The tighter spec reflects the most thermally stable zone for critical applications like battery cell monitoring.
Can LM94022QBIMG/NOPB directly drive a microcontroller's ADC input without an external op-amp or RC filter?
Yes - the LM94022QBIMG/NOPB can directly drive most SAR ADC inputs without external components. Its class-AB output delivers ±50 µA, sufficient to charge typical 10–20 pF sampling capacitors. The device tolerates loads ≤1100 pF (Section 7.4.1), covering nearly all integrated MCU ADCs. Only high-capacitance (>1100 pF) or noisy environments require a series resistor or bypass capacitor per Figure 13–14.
What is the functional difference between LM94022QBIMG/NOPB and LM94022-Q1?
The LM94022QBIMG/NOPB is the commercial-grade version; LM94022-Q1 is the automotive-qualified variant meeting AEC-Q100 Grade 0 requirements (−40°C to +150°C ambient, enhanced reliability testing). Both share identical pinout, electrical specs, and gain-select functionality. LM94022QBIMG/NOPB is rated for −50°C to +150°C operation but lacks the automotive qualification documentation and screening - making it suitable for industrial and consumer applications where AEC-Q100 is not mandated.
How do GS1 and GS0 logic levels map to output gain, and what are the valid drive methods?
GS1 and GS0 are CMOS-compatible logic inputs mapping to four gains: GS1=0/GS0=0 → −5.5 mV/°C; GS1=0/GS0=1 → −8.2 mV/°C; GS1=1/GS0=0 → −10.9 mV/°C; GS1=1/GS0=1 → −13.6 mV/°C. They may be hard-wired to VDD or GND (no pull resistors needed) or actively driven by MCU GPIO. Input thresholds are VIH ≥ VDD − 0.5 V and VIL ≤ 0.5 V (Section 6.5 Electrical Characteristics).
LM94022QBIMG/NOPB 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:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- SC-70-5
LM94022QBIMG/NOPB FAQ
1.How can I place an order for LM94022QBIMG/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM94022QBIMG/NOPB 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 LM94022QBIMG/NOPB reliable?
The price and inventory of LM94022QBIMG/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM94022QBIMG/NOPB is usually 5 days.
3.What payment methods are accepted for LM94022QBIMG/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM94022QBIMG/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM94022QBIMG/NOPB?
LM94022QBIMG/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM94022QBIMG/NOPB 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 LM94022QBIMG/NOPB?
For technical support, including LM94022QBIMG/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM94022QBIMG/NOPB requirements.
6.How does Aetrix verify that LM94022QBIMG/NOPB is sourced from the original manufacturer or authorized distributors?
All LM94022QBIMG/NOPB 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 LM94022QBIMG/NOPB meets industry standards.
7.What is the process for return or replacement of LM94022QBIMG/NOPB?
All LM94022QBIMG/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM94022QBIMG/NOPB, 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 LM94022QBIMG/NOPB part is unused and in its original packaging.
Return procedure for LM94022QBIMG/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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