Overview
The LM56BIM/NOPB, produced by Texas Instruments, is a precision low power thermostat designed for accurate temperature sensing and control. This device 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 is particularly suited for applications requiring precise temperature monitoring and control, such as microprocessor thermal management, appliances, and industrial process control.
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 |
| Operating Temperature Range | −40°C to +125°C | °C |
| Maximum VOUT1 and VOUT2 | +10V | V |
| Logical “0” Output Voltage | 0.4 V (max) at IOUT = +50 μA | 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 LM56BIM/NOPB?
The operating temperature range is −40°C to +125°C.
- What is the power supply voltage range for the LM56BIM/NOPB?
The power supply voltage range is 2.7V to 10V.
- How many digital outputs does the LM56BIM/NOPB have?
The LM56BIM/NOPB has two digital outputs, OUT1 and OUT2.
- What is the typical hysteresis temperature for the LM56BIM/NOPB?
The typical hysteresis temperature is 5°C.
- What are the package options available for the LM56BIM/NOPB?
The device is available in 8-pin SOIC and VSSOP packages.
- How does the LM56BIM/NOPB generate temperature trip points?
The temperature trip points are generated by dividing down the internal 1.250V bandgap voltage reference using three external resistors.
- What is the maximum power dissipation for the LM56BIM/NOPB at TA = 25°C?
The maximum power dissipation at TA = 25°C is 900 mW.
- Can the LM56BIM/NOPB directly drive a fan motor?
No, the digital outputs are not intended to directly drive a fan motor.
- What is the nominal voltage of the internal voltage reference?
The nominal voltage of the internal voltage reference is 1.250V.
- What are some common applications of the LM56BIM/NOPB?
Common applications include microprocessor thermal management, appliances, fan control, industrial process control, and HVAC systems.
