LM74
LM74 is 12-Bit Plus Sign Temperature Sensor manufactured by National Semiconductor.
Description
The LM74 is a temperature sensor, Delta-Sigma analog-todigital converter with an SPI and MICROWIRE patible interface. The host can query the LM74 at any time to read temperature. A shutdown mode decreases power consumption to less than 10 μA. This mode is useful in systems where low average power consumption is critical.
The LM74 has 12-bit plus sign temperature resolution (0.0625°C per LSB) while operating over a temperature range of
- 55°C to +150°C.
The LM74's 3.0V to 5.5V supply voltage range, low supply current and simple SPI interface make it ideal for a wide range of applications. These include thermal management and protection applications in hard disk drives, printers, electronic test equipment, and office electronics. The LM74 is available in the SO-8 package as well as an 5-Bump micro SMD package.
Applications
- System Thermal Management
- Personal puters
- Disk Drives
- Office Electronics
- Electronic Test Equipment
Features
- 0.0625°C temperature resolution.
- Shutdown mode conserves power between temperature reading
- SPI and MICROWIRE Bus interface
- 5-Bump micro SMD package saves space
Key Specifications
- Supply Voltage
- Supply Current
- Temperature
Accuracy
3.0V or 2.65V to 5.5V operating
265μA (typ) shutdown
520μA (max) 3μA (typ)
- 10°C to 65°C
- 25°C to 110°C
- 55°C to 125°C
±1.25°C(max) ±2.1°C(max) ±3°C(max)
Simplified Block Diagram
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 2011 National Semiconductor Corporation 100909
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Connection Diagrams
SO-8
5-Bump micro SMD
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