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- LM74A
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National Semiconductor LM74A SPI/MICROWIRE 12-Bit Temperature Sensor Datasheet
The LM74A is a Delta-Sigma analog-to-digital converter designed as a temperature sensor. It features an SPI and MICROWIRE compatible interface, allowing the host to query the device at any time to read temperature data. The device includes a shutdown mode to reduce power consumption to less than 10 µA, making it suitable for systems where low average power is critical.
The LM74A offers a temperature resolution of 0.0625°C per LSB and operates over a range of -55°C to +150°C. It is specified for use in thermal management and protection applications within hard disk drives, printers, electronic test equipment, and office electronics. The component is available in a 5-Bump micro SMD package and an 8-pin SOP package.
National Semiconductor LM74A specifications
| Temperature Resolution | 0.0625°C per LSB |
|---|---|
| Operating Temperature Range | -55°C to +150°C |
| Accuracy (0°C to +150°C) | +3.5°C (max) |
| Supply Voltage Range | 4.5V to 5.5V |
| Shutdown Current | 8 µA (typ) |
| Operating Current | 310 µA (typ) |
Source: National Semiconductor LM74A SPI/MICROWIRE 12-Bit Temperature Sensor Datasheet
All National Semiconductor LM74A documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the temperature resolution of the LM74A?
The LM74A has a temperature resolution of 0.0625°C per LSB.
From: National Semiconductor LM74A SPI/MICROWIRE 12-Bit Temperature Sensor Datasheet
What are the operating temperature limits for the LM74A?
The device operates over a temperature range of -55°C to +150°C.
From: National Semiconductor LM74A SPI/MICROWIRE 12-Bit Temperature Sensor Datasheet
What is the temperature resolution of the LM74A?
The LM74A has a 12-bit plus sign temperature resolution, which corresponds to 0.0625°C per LSB.
From: National Semiconductor LM74A SPI/MICROWIRE 12-Bit Plus Sign Temperature Sensor Datasheet
What is the supply voltage range for the LM74A?
The device operates with a supply voltage range of 4.5V to 5.5V.
From: National Semiconductor LM74A SPI/MICROWIRE 12-Bit Plus Sign Temperature Sensor Datasheet