Overview
The LM56BIMMX/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 and has an internal temperature sensor and comparators with hysteresis.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Power Supply Voltage | 2.7V–10V | V |
| Power Supply Current | 230 μA (max) | μA |
| VREF (Bandgap Voltage Reference) | 1.250V ±1% (max) | V |
| Hysteresis Temperature | 5°C (typical) | °C |
| Internal Temperature Sensor Output Voltage | 395 mV | mV |
| Operating Temperature Range | −40°C to +125°C | °C |
| Package Type | VSSOP (DGK) | |
| Number of Pins | 8 |
Key Features
- Digital Outputs Support TTL Logic Levels
- Internal Temperature Sensor
- 2 Internal Comparators with Hysteresis
- Internal Voltage Reference (1.250V bandgap voltage reference)
- Available in 8-pin VSSOP and SOIC Packages
- Low Power Consumption (230 μA max)
- Wide Operating Temperature Range (−40°C to +125°C)
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 LM56BIMMX/NOPB?
The operating temperature range is −40°C to +125°C.
- What is the power supply voltage range for the LM56BIMMX/NOPB?
The power supply voltage range is 2.7V to 10V.
- What type of packages is the LM56BIMMX/NOPB available in?
The LM56BIMMX/NOPB is available in 8-pin VSSOP and SOIC packages.
- What is the typical hysteresis temperature for the LM56BIMMX/NOPB?
The typical hysteresis temperature is 5°C.
- How many digital outputs does the LM56BIMMX/NOPB have?
The LM56BIMMX/NOPB has two digital outputs.
- What is the maximum power supply current for the LM56BIMMX/NOPB?
The maximum power supply current is 230 μA.
- What is the internal temperature sensor output voltage?
The internal temperature sensor output voltage is 395 mV.
- What are some common applications of the LM56BIMMX/NOPB?
Common applications include microprocessor thermal management, appliances, fan control, industrial process control, and HVAC systems.
- Does the LM56BIMMX/NOPB support TTL logic levels?
- How should the VREF pin be used to maintain trip point accuracy?
The VREF pin should source a 50 μA load to maintain trip point accuracy.
