Overview
The LM94021BIMGX/NOPB, produced by Texas Instruments, is a precision analog output CMOS integrated-circuit temperature sensor. It operates at a supply voltage as low as 1.5V and over a wide temperature range of −50°C to +150°C. This sensor is designed for high accuracy and low power consumption, making it ideal for battery-powered systems and general temperature sensing applications.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 1.5V to 5.5V |
| Supply Current | 9 μA (typ) at 20°C to 40°C |
| Temperature Accuracy | ±1.5°C (20°C to 40°C) ±1.8°C (−50°C to 70°C) ±2.1°C (−50°C to 90°C) ±2.7°C (−50°C to 150°C) |
| Operating Temperature | −50°C to +150°C |
| Package | SC70-5 |
| Mounting | SMD |
Key Features
- Low 1.5V operation
- Four selectable gains: −5.5 mV/°C, −8.2 mV/°C, −10.9 mV/°C, and −13.6 mV/°C
- Very accurate over a wide temperature range of −50°C to +150°C
- Low quiescent current
- Output is short-circuit protected
- Extremely small SC70 package
- Footprint compatible with the industry-standard LM20 temperature sensor
- UL recognized component
Applications
- Cell Phones
- Wireless Transceivers
- Battery Management
- Automotive
- Disk Drives
- Games
- Appliances
Q & A
- What is the operating temperature range of the LM94021?
The LM94021 operates over a temperature range of −50°C to +150°C. - What are the selectable gains of the LM94021?
The LM94021 has four selectable gains: −5.5 mV/°C, −8.2 mV/°C, −10.9 mV/°C, and −13.6 mV/°C. - What is the minimum supply voltage for the LM94021?
The minimum supply voltage for the LM94021 is 1.5V. - How accurate is the LM94021 over its operating temperature range?
The LM94021 has a temperature accuracy of ±1.5°C (20°C to 40°C), ±1.8°C (−50°C to 70°C), ±2.1°C (−50°C to 90°C), and ±2.7°C (−50°C to 150°C). - Is the LM94021 suitable for battery-powered systems?
Yes, the LM94021 is suitable for battery-powered systems due to its low quiescent current. - What package type does the LM94021 come in?
The LM94021 comes in an SC70-5 package. - Is the LM94021 UL recognized?
Yes, the LM94021 is UL recognized. - Can the gain-select inputs be driven by logic signals?
Yes, the gain-select inputs can be driven by logic signals, allowing the system to optimize the gain during operation or system diagnostics. - What are some common applications of the LM94021?
The LM94021 is commonly used in cell phones, wireless transceivers, battery management, automotive systems, disk drives, games, and appliances. - Is the output of the LM94021 short-circuit protected?
Yes, the output of the LM94021 is short-circuit protected.
