0.5C Accurate, 10-Bit Digital Temperature Sensors in SOT-23 Data Sheet AD7414/AD7415 FUNCTIONAL BLOCK DIAGRAM FEATURES BAND GAP 10-BIT 10-bit temperature-to-digital converter TEMPERATURE ANALOG-DIGITAL GND SENSOR CONVERTER Temperature range: 40C to +125C V DD Typical accuracy of 0.5C at +40C CONFIGURATION 2 TEMPERATURE REGISTER SMBus/I C-compatible serial interface VALUE REGISTER T SETPOINT 3 A power-down current HIGH REGISTER Temperature conversion time: 29 s typ SETPOINT T SETPOINT ALERT LOW COMPARATOR Space-saving 6-lead (AD7414) and 5-lead (AD7415) REGISTER SOT-23 packages SCL Pin selectable addressing via AS 2 SMBus/I C INTERFACE AS SDA Overtemperature indicator (AD7414 Only) AD7414 SMBus alert function (AD7414 only) 2 4 versions allow 8 I C addresses (AD7414) AD7415 2 2 versions allow 6 I C addresses (AD7415) 10-BIT BAND GAP TEMPERATURE ANALOG-DIGITAL GND V DD SENSOR CONVERTER APPLICATIONS Hard disk drives TEMPERATURE CONFIGURATION Personal computers VALUE REGISTER REGISTER Electronic test equipment AS Office equipment SCL 2 SMBus/I C Domestic appliances INTERFACE SDA Process control Cellular phones Figure 1. limit is exceeded. A configuration register allows programming of GENERAL DESCRIPTION the state of the ALERT output (active high or active low). This The AD7414/AD7415 are complete temperature monitoring output can be used as an interrupt or as an SMBus alert. systems in 6-lead and 5-lead SOT-23 packages. They contain a PRODUCT HIGHLIGHTS band gap temperature sensor and a 10-bit ADC to monitor and digitize the temperature reading to a resolution of 0.25C. 1. On-chip temperature sensor. The sensor allows an accurate The AD7414/AD7415 provide a 2-wire serial interface that is measurement of the ambient temperature to be made. It is 2 compatible with SMBus and I C interfaces. The parts come in four capable of 0.5C temperature accuracy. versions: the AD7414/AD7415-0, AD7414/AD7415-1, AD7414-2, 2. SMBus/I2C-compatible serial interface. The interface and AD7414-3. The AD7414/AD7415-0 and AD7414/AD7415-1 offers pin selectable choice of three addresses per version of the AD7414/AD7415, eight address options in total for versions provide a choice of three different SMBus addresses for the AD7414, and six in total for the AD7415. each version. All four AD7414 versions give the possibility of eight 2 3. Supply voltage of 2.7 V to 5.5 V. different I C addresses while the two AD7415 versions allow up to 2 six I C addresses to be used. 4. Space-saving 5-lead and 6-lead SOT-23 packages. 5. 10-bit temperature reading to 0.25C resolution. The AD7414/AD7415s 2.7 V supply voltage, low supply current, 6. Overtemperature indicator. This indicator can be software serial interface, and small package size make them ideal for a disabled. It is used as an interrupt of SMBus alert. variety of applications, including personal computers, office 7. One-shot and automatic temperature conversion rates. equipment, cellular phones, and domestic appliances. In the AD7414, on-chip registers can be programmed with high and low temperature limits, and an open-drain overtemperature indicator output (ALERT) becomes active when a programmed Rev. G Document Feedback 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20012019 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 02463-001AD7414/AD7415 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Temperature Value Register (Address 0X00) .......................... 10 Applications ....................................................................................... 1 AD7414 THIGH Register (Address 0x02) ................................... 10 General Description ......................................................................... 1 AD7414 TLOW Register (Address 0X03) ................................... 10 Functional Block Diagram .............................................................. 1 Serial Interface ................................................................................ 12 Product Highlights ........................................................................... 1 Serial Bus Address ...................................................................... 12 Revision History ............................................................................... 2 Write Mode ................................................................................. 12 Specif icat ions ..................................................................................... 3 Read Mode .................................................................................. 12 Absolute Maximum Ratings ............................................................ 5 SMBUS ALERT ............................................................................ 13 ESD Caution .................................................................................. 5 Power-On Defaults ..................................................................... 13 Pin Configurations and Function Descriptions ........................... 6 Operating Modes ........................................................................ 13 Theory of Operation ........................................................................ 7 Power vs. Throughput................................................................ 14 Circuit Information ...................................................................... 7 Mounting the AD7414/AD7415 .............................................. 14 Functional Description ................................................................ 7 Supply Decoupling ..................................................................... 14 Measurement Technique ............................................................. 7 Temperature Accuracy vs. Supply ............................................ 15 Temperature Data Format ........................................................... 8 Typical Temperature Error Graph ............................................ 15 Internal Register Structure .............................................................. 9 Outline Dimensions ....................................................................... 16 Address Pointer Register ............................................................. 9 Ordering Guide .......................................................................... 18 Configuration Register (Address 0X01) .................................... 9 REVISION HISTORY 9/2019Rev. F to Rev. G Updated Specifications ..................................................................... 2 Changes to Mode 1 Section ........................................................... 14 Updated Absolute Maximum Ratings ............................................ 3 Changes to Ordering Guide .......................................................... 18 Updated Ordering Guide ................................................................. 4 Updated Circuit Information ........................................................... 5 11/2010Rev. E to Rev. F Updated Temperature Data Format ................................................ 6 Added Data Hold Time, t Parameter, Table 1 .............................. 4 Updated Temperature Value Register ............................................. 8 7 Changes to Figure 2 .......................................................................... 4 Updated Figure 14 .......................................................................... 11 Updated Outline Dimensions ....................................................... 12 Updated to Outline Dimensions .................................................. 16 Changes to Ordering Guide .......................................................... 18 11/2002Rev. A to Rev. B 4/2005Rev. D to Rev. E Changes to Absolute Maximum Ratings ........................................ 3 Updated Format .................................................................. Universal Changes to Absolute Maximum Ratings ....................................... 6 10/2002Rev. 0 to Rev. A Changes to Figure 6 .......................................................................... 7 Changes to Specifications ................................................................. 2 Changes to Ordering Guide .......................................................... 17 Changes to Pin Function Descriptions ........................................... 3 Changes to Absolute Maximum Ratings ........................................ 3 9/2004Rev. C to Rev. D Ordering Guide Updated ................................................................. 4 Changes to Absolute Maximum Ratings ....................................... 3 Change to Figure 2 ............................................................................ 5 Updated Ordering Guide ................................................................. 4 Added to Typical Temperature Error Graph section ................. 11 Added Figure 15 ............................................................................. 11 8/2003Rev. B to Rev. C Outline Dimensions updated ........................................................ 12 Change to Temperature Range ......................................... Universal 7/2001Revision 0: Initial Version Updated Features .............................................................................. 1 Rev. G Page 2 of 19