Overview
The LM94022BIMG/NOPB is a precision analog output temperature sensor produced by Texas Instruments. This device is part of the LM94022 series and is known for its high accuracy and versatility in temperature sensing applications. It operates over a wide temperature range of –50°C to +150°C and can be powered from a supply voltage of 1.5 V to 5.5 V, making it suitable for various environments and power constraints.
The sensor features a class-AB output stage, which provides strong source and sink current capabilities, making it ideal for driving heavy transient loads. The device is packaged in a small SC70-5 package, enhancing its suitability for space-constrained designs.
Key Specifications
| Parameter | Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Supply Voltage (VDD) | 1.5 | 5.5 | V | ||
| Temperature Range | –50 | +150 | °C | ||
| Temperature Accuracy | –50°C to +150°C | –2.7 | +2.7 | °C | |
| Supply Current | VDD = 1.5 V to 5.5 V | 5.4 | µA | ||
| Output Source Current | ±50 | µA | |||
| Sensor Gain | GS1 = 0, GS0 = 0 | –5.5 | mV/°C | ||
| Sensor Gain | GS1 = 0, GS0 = 1 | –8.2 | mV/°C | ||
| Sensor Gain | GS1 = 1, GS0 = 0 | –10.9 | mV/°C | ||
| Sensor Gain | GS1 = 1, GS0 = 1 | –13.6 | mV/°C | ||
| Package | SC70-5 |
Key Features
- Selectable Gain: The LM94022BIMG/NOPB features digitally selectable gain through the GS1 and GS0 input pins, allowing for four different gain settings: –5.5 mV/°C, –8.2 mV/°C, –10.9 mV/°C, and –13.6 mV/°C.
- Class-AB Output: The device has a class-AB output stage that can source or sink current, providing strong output drive capability for heavy transient loads.
- Low Power Consumption: It operates with a low supply current of 5.4 µA, making it energy-efficient.
- Wide Temperature Range: The sensor can measure temperatures from –50°C to +150°C, with an accuracy of ±2.7°C over this range.
- Small Package: The SC70-5 package is extremely small, making it ideal for space-constrained designs.
- Output Short-Circuit Protection: The output is protected against short circuits, enhancing reliability).
Applications
- Automotive Systems: AEC-Q100 Grade 0 qualified, making it suitable for automotive applications).
- Cell Phones and Wireless Transceivers: Its low power consumption and small size make it ideal for mobile devices).
- Battery Management Systems: Can be used to monitor battery temperatures in various battery management systems).
- Disk Drives and Storage Devices: Useful for temperature monitoring in storage devices to ensure optimal performance).
- Appliances and Consumer Electronics: Suitable for general temperature sensing in a wide range of consumer electronics and appliances).
Q & A
- What is the operating temperature range of the LM94022BIMG/NOPB?
The LM94022BIMG/NOPB operates over a temperature range of –50°C to +150°C).
- What is the supply voltage range for the LM94022BIMG/NOPB?
The device can be powered from a supply voltage of 1.5 V to 5.5 V).
- What are the gain settings available for the LM94022BIMG/NOPB?
The device has four selectable gain settings: –5.5 mV/°C, –8.2 mV/°C, –10.9 mV/°C, and –13.6 mV/°C, controlled by the GS1 and GS0 input pins).
- What is the typical supply current of the LM94022BIMG/NOPB?
The typical supply current is 5.4 µA).
- What is the output current capability of the LM94022BIMG/NOPB?
The device can source or sink up to ±50 µA).
- Is the LM94022BIMG/NOPB suitable for automotive applications?
Yes, it is AEC-Q100 Grade 0 qualified, making it suitable for automotive applications).
- What package type does the LM94022BIMG/NOPB come in?
The device is packaged in an SC70-5 package).
- Does the LM94022BIMG/NOPB have short-circuit protection?
Yes, the output is protected against short circuits).
- What are some common applications of the LM94022BIMG/NOPB?
Common applications include automotive systems, cell phones, wireless transceivers, battery management systems, disk drives, and consumer electronics).
- How accurate is the temperature measurement of the LM94022BIMG/NOPB?
The temperature accuracy is ±2.7°C over the operating temperature range).
