Key facts
- Model
- LM74
- Category
- Other Electronics
- Documents
- 6
- Languages
- EN
- Last added
- 2012-07-06
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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 LM74 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 LM74 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
- National Semiconductor LM74A SPI/MICROWIRE 12-Bit Temperature Sensor Datasheet 12 p
- National Semiconductor LM74A SPI/MICROWIRE 12-Bit Plus Sign Temperature Sensor Datasheet 12 p
- National Semiconductor LM748 Operational Amplifier Datasheet 6 p
- National Semiconductor LM741 Operational Amplifier Datasheet 8 p
- National Semiconductor LM74 SPI/MICROWIRE 12-Bit Plus Sign Temperature Sensor handbook 15 p
- National Semiconductor LM747 Dual Operational Amplifier Datasheet 8 p
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
What is the operating voltage range for the LM748?
The device operates from +5V to +20V.
From: National Semiconductor LM748 Operational Amplifier Datasheet
Does the LM748 have short-circuit protection?
Yes, it features continuous short-circuit protection.
From: National Semiconductor LM748 Operational Amplifier Datasheet