LM74A Datasheet | Texas Instruments

FEATURES - 2 0.0625°C Temperature Resolution - Shutdown Mode Conserves Power between Temperature Reading - SPI and MICROWIRE Bus Interface - LM74 is also Available in a 5-Bump DSBGA and 8-pin SOIC KEY SPECIFICATIONS - Supply Voltage - LM74A-5: 4.5V to 5.5V - LM74A-3: 3.0V to 3.6V - Supply Current - Operating - 310µA (Typ) - 520µA (Max) - Shutdown: 8µA (Typ) - LM74A-5 MDA: 0°C to 140°C, ±3.0°C(Max) - Temperature Accuracy: 140°C to 150°C, ±3.5°C(Max) APPLICATIONS - System Thermal Management - Personal puters - Disk Drives - Office Electronics - Electronic Test Equipment DESCRIPTION The LM74A is a temperature sensor, Delta-Sigma analog-to-digital converter with an SPI and MICROWIRE patible interface in die form. The host can query the LM74A 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. This particular data sheet applies to the LM74 in die form. The LM74 is available in the 8-pin SOIC package as well as an 5-Bump DSBGA package please refer to LM74 data sheet for detailed specifictions pertaining to the packaged parts. The LM74A has 12-bit plus sign temperature resolution (0.0625°C per LSB) while operating over a temperature range of - 40°C to +150°C. The LM74A-5 MDA accuracy of ±3.5°C is specified over a temperature range of 0°C to +150°C. Figure 1. Simplified Block Diagram Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2001- 2013, Texas Instruments...