Overview
The LM56BIMX/NOPB is a precision low power thermostat produced by Texas Instruments. This device is designed to provide accurate temperature sensing and control, making it suitable for a wide range of applications. The LM56 features two stable temperature trip points (VT1 and VT2) generated by dividing down the internal 1.250V bandgap voltage reference using three external resistors. It includes two digital outputs that support TTL logic levels, an internal temperature sensor, and internal comparators with hysteresis.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Power Supply Voltage | 2.7V–10V | V |
| Power Supply Current | 230 μA (max) | μA |
| VREF Nominal | 1.250V ±1% (max) | V |
| Hysteresis Temperature | 5°C (typical) | °C |
| Internal Temperature Sensor Output Voltage | 395 mV | mV |
| Temperature Trip Point Accuracy (at +25°C) | ±2°C (max) for LM56BIM | °C |
| Operating Temperature Range | −40°C to +125°C | °C |
| Maximum VOUT1 and VOUT2 | +10V | V |
Key Features
- Digital Outputs Support TTL Logic Levels
- Internal Temperature Sensor
- 2 Internal Comparators with Hysteresis
- Internal Voltage Reference
- Available in 8-pin SOIC and VSSOP Packages
- Low Power Consumption: 230 μA (max) at V+ = 2.7V to 10V
- Precision Temperature Trip Points with Adjustable Hysteresis
Applications
- Microprocessor Thermal Management
- Appliances
- Portable Battery Powered 3.0V or 5V Systems
- Fan Control
- Industrial Process Control
- HVAC Systems
- Remote Temperature Sensing
- Electronic System Protection
Q & A
- What is the operating temperature range of the LM56BIMX/NOPB?
The operating temperature range is −40°C to +125°C.
- What is the power supply voltage range for the LM56BIMX/NOPB?
The power supply voltage range is 2.7V to 10V.
- How many digital outputs does the LM56BIMX/NOPB have?
The device has two digital outputs that support TTL logic levels.
- What is the typical hysteresis temperature for the LM56BIMX/NOPB?
The typical hysteresis temperature is 5°C.
- What are the package options for the LM56BIMX/NOPB?
The device is available in 8-pin SOIC and VSSOP packages.
- What is the maximum power supply current for the LM56BIMX/NOPB?
The maximum power supply current is 230 μA.
- How accurate are the temperature trip points for the LM56BIMX/NOPB?
The temperature trip point accuracy is ±2°C (max) at +25°C for the LM56BIM.
- Can the LM56BIMX/NOPB be used in industrial process control?
- What is the internal voltage reference value for the LM56BIMX/NOPB?
The internal voltage reference is 1.250V ±1% (max).
- How does the LM56BIMX/NOPB protect against overtemperature conditions?
The device protects against overtemperature conditions by providing digital outputs that go low when the temperature exceeds the set trip points and go high when the temperature drops below the hysteresis level.
