Datasheet AD7814 (Analog Devices)

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10-Bit Digital Temperature Sensor in 6-Lead SOT-23 AD7814 FEATURES FUNCTIONAL BLOCK DIAGRAM 10-Bit Temperature-to-Digital Converter –55
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C to +125
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C Operating Temperature Range BAND GAP 10-BIT
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2
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C Accuracy TEMPERATURE ANALOG/DIGITAL SPI- and DSP-Compatible Serial Interface SENSOR CONVERTER Shutdown Mode GND VDD Space-Saving SOT-23 Package TEMPERATURE AD7814 VALUE APPLICATIONS REGISTER Hard Disk Drives Personal Computers CS SERIAL Electronic Test Equipment SCLK BUS Office Equipment INTERFACE DIN DOUT Domestic Appliances Process Control GENERAL DESCRIPTION PRODUCT HIGHLIGHTS
The AD7814 is a complete temperature monitoring system in a 1. The AD7814 has an on-chip temperature sensor that allows SOT-23 package or 8-lead MSOP package. It contains a band an accurate measurement of the ambient temperature. The gap temperature sensor and 10-bit ADC to monitor and digitize measurable temperature range is –55°C to +125°C, with a the temperature reading to a resolution of 0.25°C. ±2°C temperature accuracy. The AD7814 has a flexible serial interface that allows easy inter- 2. Supply voltage of 2.7 V to 5.5 V facing to most microcontrollers. The interface is compatible 3. Space-saving 6-lead SOT-23 package and 8-lead MSOP with SPI®, QSPI™, and MICROWIRE™ protocol, and is also package compatible with DSPs. The part features a standby mode that is controlled via the serial interface. 4. 10-bit temperature reading to 0.25°C resolution The AD7814’s wide supply voltage range, low supply current, 5. Standby mode that reduces the current consumption to 1 µA and SPI-compatible interface make it ideal for a variety of applications, including personal computers, office equipment, and domestic appliances. Purchase of licensed I2C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I 2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips. REV. E Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise
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Document Outline FEATURES FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS SPECIFICATIONS TIMING CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE PIN FUNCTION DESCRIPTIONS PIN CONFIGURATIONS CIRCUIT INFORMATION CONVERTER DETAILS TEMPERATURE VALUE REGISTER SERIAL INTERFACE Read Operation Write Operation MICROPROCESSOR INTERFACING AD7814 to MC68HC11 Interface AD7814 to 8051 Interface AD7814 to PIC16C6x/7x Interface AD7814 to ADSP-21xx Interface MOUNTING THE AD7814 SUPPLY DECOUPLING OUTLINE DIMENSIONS Revision History