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Texas Instruments LM94022BIMG/NOPB
- Part No.:
- LM94022BIMG/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM94022BIMG/NOPB.pdf
- Description:
- SENSOR ANALOG -50C-150C SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:23,453
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Product details
Overview
LM94022BIMG/NOPB from Texas Instruments is a precision analog-output CMOS temperature sensor with selectable negative temperature coefficient (NTC) gain, −5.5 to −13.6 mV/°C, ±1.5°C accuracy from 20°C to 40°C, 1.5–5.5 V supply range, and SC70-5 package - used for battery-powered thermal monitoring in automotive ECUs and portable electronics.
For engineers reviewing the LM94022BIMG/NOPB datasheet, LM94022BIMG/NOPB pinout, LM94022BIMG/NOPB application, or LM94022BIMG/NOPB equivalent, this page delivers verified functional identity, gain-select logic behavior, class-AB output drive capability, thermal accuracy across −50°C to +150°C, and real-world design implications of output voltage shift and capacitive load handling.
Technical Context
The LM94022BIMG/NOPB implements a stacked thermal diode sensing element with digitally controlled gain selection via GS1/GS0 logic inputs, enabling four discrete NTC slopes. Its class-AB output stage provides ±50 µA source/sink current, supporting direct interface to SAR ADC sample-and-hold inputs without external buffering.
Gain selection alters the number of forward-biased base-emitter junctions in the sensing core, directly scaling output sensitivity while preserving linearity. Output voltage shift (≤±1 mV) occurs near VDD – VOUT ≈ 1 V due to rail-to-rail buffer behavior - a known, characterized effect included in published accuracy limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5 V to 5.5 V - enables operation from single-cell Li-ion or alkaline batteries without regulation. |
| Temperature Range | −50°C to +150°C - supports under-hood automotive, industrial motor, and high-reliability embedded use. |
| Accuracy (20°C–40°C) | ±1.5°C - specified at room temperature with full supply range (1.5–5.5 V), usable for calibration-critical systems. |
| Selectable Gain | −5.5 / −8.2 / −10.9 / −13.6 mV/°C - four discrete NTC slopes set by GS1/GS0 logic levels for noise or resolution optimization. |
| Supply Current | 5.4 µA typical - ultra-low quiescent current extends battery life in always-on thermal monitoring. |
| Output Drive | ±50 µA source/sink - sufficient to charge typical 10–20 pF SAR ADC sampling capacitors without external op-amp. |
| Capacitive Load Limit | 1100 pF - drives ADC input capacitance directly; >1100 pF requires series resistor per TI Figure 14. |
Pinout & Package
LM94022BIMG/NOPB uses the SC70-5 (DCK) package: 2.00 mm × 1.25 mm body, 0.65 mm pitch, 5-pin surface-mount outline with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 2) | Power Ground Reference | Return path for internal biasing and output stage; must be low-impedance to minimize ground bounce errors. |
| OUT (Pin 3) | Analog Voltage Output | Class-AB buffered NTC output; voltage decreases linearly with rising temperature per selected gain. |
| VDD (Pin 4) | Positive Supply Input | Accepts 1.5–5.5 V; powers internal bandgap reference, gain control logic, and output amplifier. |
| GS0 (Pin 1) | Gain Select Logic Input 0 | CMOS-compatible digital input; ties low/high to select gain slope; no pull-up/down resistors required. |
| GS1 (Pin 5) | Gain Select Logic Input 1 | CMOS-compatible digital input; combined with GS0, selects one of four output sensitivities per Table 1. |
Key Features
| Feature | Design Value |
|---|---|
| Four programmable NTC gains | Enables system-level trade-off between resolution (higher gain) and supply headroom (lower gain at 1.5 V). |
| Class-AB output stage | Delivers ±50 µA drive into transient loads like SAR ADC sampling capacitors without external buffer. |
| Short-circuit protected output | Prevents latch-up or damage during accidental OUT-to-GND/VDD shorts in production or field use. |
| Footprint compatibility with LM20 | Allows drop-in replacement in legacy designs using industry-standard LM20 layout, reducing redesign effort. |
| SC70-5 package size | 2.00 mm × 1.25 mm footprint saves PCB area in space-constrained portable and automotive modules. |
Applications
| Automotive Engine Control Unit (ECU) | Battery Management System (BMS) |
|---|---|
|
Use Scenario: Real-time cylinder head or transmission oil temperature monitoring in engine bay environments up to +150°C. IC Role / Device Role / Timing Role: Analog temperature transducer providing gain-configurable NTC voltage output to microcontroller ADC. Use Value: ±1.8°C accuracy over −50°C to +70°C enables closed-loop thermal derating without external calibration. |
Use Scenario: Cell-level temperature sensing in multi-cell Li-ion packs for charge/discharge safety cutoff. IC Role / Device Role / Timing Role: Low-power analog sensor interfacing directly to battery monitor IC or MCU ADC with minimal BOM. Use Value: 5.4 µA supply current and 1.5 V minimum operation extend runtime in always-on pack monitoring mode. |
| Wireless Transceiver Thermal Protection | Industrial Motor Drive Controller |
|
Use Scenario: PA die temperature tracking in 5G small-cell RF front-end modules subject to rapid thermal transients. IC Role / Device Role / Timing Role: Fast-response analog sensor with selectable gain to maximize ADC resolution during thermal ramp events. Use Value: −13.6 mV/°C gain (GS1=1, GS0=1) improves signal-to-quantization-noise ratio by >2× vs. lowest gain setting. |
Use Scenario: IGBT heatsink temperature feedback in servo drives operating continuously at 85°C ambient. IC Role / Device Role / Timing Role: High-accuracy analog sensor with AEC-Q100 Grade 0 qualification for functional safety compliance. Use Value: ±2.7°C accuracy over −50°C to +150°C supports IEC 61800-5-2 thermal class H derating thresholds. |
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 | Fixed −10 mV/°C gain; TO-92 and SOT-23 packages; no gain select pins; ±1.5°C accuracy only at 25°C. | Lacks in-system gain reconfiguration; limited to fixed-slope applications where resolution flexibility is unnecessary. | Choose LMT84DBVR for cost-sensitive, non-programmable designs requiring same footprint as LM20 but no digital control. |
| LM20CIMM/NOPB | Fixed −11.9 mV/°C gain; SC70-5 package; ±2.5°C accuracy over −40°C to +125°C; no GS pins or class-AB drive. | No gain selection or high-current output; lower accuracy and narrower temp range than LM94022BIMG/NOPB. | Choose LM20CIMM/NOPB only when legacy LM20 compatibility is mandatory and gain flexibility is not required. |
Compared with LMT84DBVR and LM20CIMM/NOPB, LM94022BIMG/NOPB uniquely combines programmable gain, class-AB drive, and extended −50°C to +150°C accuracy - making it the only option for dynamically optimized thermal sensing in battery-constrained or high-temperature systems.
Availability
LM94022BIMG/NOPB is available at Aetrix Electronics and suitable for automotive ECU thermal monitoring, battery management systems, wireless transceiver protection, and industrial motor drive controllers requiring stable component supply and long-term lifecycle support.
Supply support for LM94022BIMG/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 analog sensors and automotive-grade ICs.
The LM94022 product line delivers programmable-gain analog temperature sensors designed for high-accuracy, low-power thermal monitoring in automotive, industrial, and portable electronics where supply voltage headroom and resolution flexibility are critical.
FAQ
What is the minimum supply voltage required for full-range operation of LM94022BIMG/NOPB?
The LM94022BIMG/NOPB achieves full −50°C to +150°C operation only when configured with the lowest gain setting (GS1 = 0, GS0 = 0, −5.5 mV/°C). At this gain, the device operates down to 1.5 V. Higher gains require progressively higher minimum supply voltages - e.g., −13.6 mV/°C (GS1 = 1, GS0 = 1) requires ≥3.0 V for full-range accuracy. This relationship is explicitly defined in Section 6.5 of the SNIS140F datasheet.
How does the LM94022BIMG/NOPB handle capacitive loading on its OUT pin?
The LM94022BIMG/NOPB drives capacitive loads ≤1100 pF directly without external components, as verified in Figure 13 of the datasheet. For loads >1100 pF - such as large ADC input networks or long PCB traces - a series resistor (e.g., 800 Ω for 1 µF) must be added per Figure 14 to ensure stability. This design requirement prevents oscillation and preserves monotonic output response.
Can the gain select pins (GS1/GS0) of LM94022BIMG/NOPB be driven by a microcontroller GPIO?
Yes - GS1 and GS0 are CMOS-compatible logic inputs with VIH ≥ VDD − 0.5 V and VIL ≤ 0.5 V, allowing direct connection to standard 1.8 V, 3.3 V, or 5 V microcontroller GPIOs. No pull-up or pull-down resistors are needed, and leakage current is <1 µA. This enables dynamic gain switching during system diagnostics or adaptive thermal measurement modes.
Is LM94022BIMG/NOPB qualified for automotive applications?
Yes - the LM94022BIMG/NOPB is AEC-Q100 Grade 0 qualified (−40°C to +150°C ambient), manufactured on an automotive-grade flow, and specified for operation up to +150°C junction temperature. It meets stringent automotive reliability and qualification requirements, making it suitable for engine control, transmission, and ADAS thermal sensing.
What is the impact of output voltage shift on LM94022BIMG/NOPB accuracy?
LM94022BIMG/NOPB exhibits a small, characterized output voltage shift (typically ≤±1 mV) when VDD – VOUT ≈ 1 V, caused by rail-to-rail buffer behavior. This shift occurs over a wide temperature interval (5–20°C) and is fully monotonic. Crucially, all published accuracy specifications in Section 6.5 include this effect - no additional derating is required for system-level accuracy budgeting.
LM94022BIMG/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:
- -
- Qualification:
- -
- Supplier Device Package:
- SC-70-5
LM94022BIMG/NOPB FAQ
1.How can I place an order for LM94022BIMG/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM94022BIMG/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 LM94022BIMG/NOPB reliable?
The price and inventory of LM94022BIMG/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM94022BIMG/NOPB is usually 5 days.
3.What payment methods are accepted for LM94022BIMG/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM94022BIMG/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM94022BIMG/NOPB?
LM94022BIMG/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM94022BIMG/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 LM94022BIMG/NOPB?
For technical support, including LM94022BIMG/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM94022BIMG/NOPB requirements.
6.How does Aetrix verify that LM94022BIMG/NOPB is sourced from the original manufacturer or authorized distributors?
All LM94022BIMG/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 LM94022BIMG/NOPB meets industry standards.
7.What is the process for return or replacement of LM94022BIMG/NOPB?
All LM94022BIMG/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM94022BIMG/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 LM94022BIMG/NOPB part is unused and in its original packaging.
Return procedure for LM94022BIMG/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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