Overview
The LM57BISD-5/NOPB, produced by Texas Instruments, is a precision, dual-output temperature switch with an analog temperature sensor output. This device is designed for a wide range of industrial applications, including overtemperature alarm and temperature monitoring. It features a resistor-programmable trip temperature and an analog output voltage that is proportional to the temperature. The LM57 includes an internal reference DAC, an analog temperature sensor, and an analog comparator, making it highly versatile for various temperature sensing needs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | WSON-8 (2.5x2.5 mm) | |
| Supply Voltage | 2.4 to 5.5 | V |
| Operating Temperature Range | -50 to 150 | °C |
| Trip Point Accuracy | ±0.8°C (typ), ±1.5°C (max) | |
| Hysteresis | 5°C (typ) | |
| VTEMP Output Accuracy | ±0.7 to ±1.3°C | |
| ESD Protection | Human Body Model (HBM): ±5500 V, Charged-Device Model (CDM): ±1250 V | |
| Junction-to-Ambient Thermal Resistance | 71.3 °C/W |
Key Features
- Resistor-programmable trip temperature with 256 possible values using two external 1% resistors.
- Analog temperature sensor output (VTEMP) proportional to temperature.
- Dual-output: digital overtemperature alarm (TOVER) and analog temperature sensor output.
- Internal reference DAC and analog comparator.
- Programmable gain for VTEMP output.
- Low supply current and high accuracy over a wide temperature range.
Applications
- Industrial temperature monitoring and control.
- Overtemperature alarm systems.
- Avionics and aerospace applications.
- Telecom infrastructure devices.
- Automotive systems (with appropriate automotive-grade versions).
Q & A
- What is the operating temperature range of the LM57BISD-5/NOPB?
The operating temperature range is -50°C to 150°C. - How is the trip temperature set for the LM57BISD-5/NOPB?
The trip temperature is set using two external 1% resistors connected to the SENSE pins. - What is the accuracy of the VTEMP output?
The VTEMP output accuracy is typically ±0.7 to ±1.3°C. - What are the package options for the LM57?
The LM57 is available in WSON-8 (2.5x2.5 mm) and TSSOP-8 packages. - What is the supply voltage range for the LM57BISD-5/NOPB?
The supply voltage range is 2.4 V to 5.5 V. - Does the LM57BISD-5/NOPB have ESD protection?
Yes, it has ESD protection with Human Body Model (HBM) of ±5500 V and Charged-Device Model (CDM) of ±1250 V. - What are some common applications of the LM57BISD-5/NOPB?
Common applications include industrial temperature monitoring, overtemperature alarm systems, avionics, telecom infrastructure, and automotive systems. - How does the LM57BISD-5/NOPB handle hysteresis?
The device has a hysteresis option of 5°C or 10°C, depending on the model. - Is the LM57BISD-5/NOPB suitable for automotive applications?
Yes, but for automotive applications, specific automotive-grade versions like the LM57FSPWQ1 or LM57TSPWQ1 should be used. - What is the junction-to-ambient thermal resistance of the LM57BISD-5/NOPB in the WSON package?
The junction-to-ambient thermal resistance is 71.3 °C/W.
