adt7410z Analog Devices, Inc., adt7410z Datasheet

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adt7410z

Manufacturer Part Number
adt7410z
Description
?0.5?c Accurate, 16-bit Digital I2c Temperature Sensor
Manufacturer
Analog Devices, Inc.
Datasheet
Preliminary Technical Data
FEATURES
16-bit temperature-to-digital converter
Temperature accuracy ±0.5°C from 0°C to 70°C
Power saving 1 Sample Per Second mode
I
Operating temperature range : −55°C to +150°C
Operating voltage range: 2.7 V to 5.5 V
Critical overtemperature indicator
Programmable overtemperature/undertemperature interrupt
Shutdown mode for low power consumption
Power consumption 1 mW typical at 3.3 V
Standard 8-lead narrow SOIC RoHS-compliant package
APPLICATIONS
Medical equipment
Isolated sensors
Environmental control systems
Computer thermal monitoring
Thermal protection
Industrial process control
Power system monitors
Hand-held applications
GENERAL DESCRIPTION
The ADT7410 is a high accuracy digital temperature sensor
in a narrow SOIC package. It contains a band gap temperature
sensor and a13-bit ADC, to monitor and digitize the
temperature to a resolution of 0.0625°C. The resolution
can be changed to 16 bits by setting a bit in the configuration
register, to give a 0.0078°C resolution. The default resolution
is 13 bits.
The ADT7410 is guaranteed to operate at supply voltages from
2.7 V to 5.5 V. Operating at 3.3 V, the average supply current is
typically 250 μA. The ADT7410 offers a shutdown mode that
powers down the device and gives a shutdown current of typically
0.8 μA. The ADT7410 is rated for operation over the −55°C to
+150°C temperature range.
Rev. PrE
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. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
2
C-compatible interface
FUNCTIONAL BLOCK DIAGRAM
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Pins A0 and A1 are available for address selection, giving the
ADT7410 4 possible I
output that becomes active when the temperature exceeds a
programmable critical temperature limit. The default critical
temperature limit is 147°C. The INT pin is also an open-drain
output that becomes active when the temperature exceeds a
programmable limit. The INT and CT pins can operate in either
comparator or interrupt mode.
A0
A1
3
4
CONFIGURATION
TEMPERATURE
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
VALUE
T
T
T
T
CRIT
HYST
HIGH
LOW
±0.5°C Accurate, 16-Bit Digital
TEMPERATURE
REFERENCE
2
INTERNAL
C addresses. The CT pin is an open-drain
SENSOR
©2008 Analog Devices, Inc. All rights reserved.
REGISTER
POINTER
SMBus/I
I2C Temperature Sensor
Figure 1.
GND
V
DD
8
7
2
C INTERFACE
OSCILLATOR
MODULATOR
INTERNAL
FILTER
LOGIC
Σ-Δ
www.analog.com
T
T
T
ADT7410
CRIT
HIGH
LOW
ADT7410
6
5
1
2
CT
INT
SCL
SDA

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adt7410z Summary of contents

Page 1

... The INT and CT pins can operate in either comparator or interrupt mode. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.461.3113 ©2008 Analog Devices, Inc. All rights reserved. ADT7410 CRIT ...

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ADT7410 PRODUCT HIGHLIGHTS • An on-chip temperature sensor allows an accurate measurement of the ambient temperature. The measurable temperature range is −55°C to +150°C. • Supply voltage is 2 5.5 V. • Available in an 8-lead narrow SOIC ...

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Preliminary Technical Data TABLE OF CONTENTS Features ............................................................................................... 1 Applications ....................................................................................... 1 Functional Block Diagram ............................................................... 1 General Description .......................................................................... 1 Product Highlights ............................................................................ 2 Revision History ................................................................................ 3 Specifications ..................................................................................... Timing Specifications ............................................................ 5 Timing ...

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ADT7410 SPECIFICATIONS T = −55°C to +150° 2 5.5 V, unless otherwise noted Table 1. Parameter Min TEMPERATURE SENSOR AND ADC Accuracy ADC Resolution Temperature Resolution 13 Bits 16 Bits Temperature Conversion Time Fast ...

Page 5

Preliminary Technical Data TIMING SPECIFICATIONS T = −55°C to +150° 2 5.5 V, unless otherwise noted. All input signals are specified with (10 and timed ...

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ADT7410 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter V to GND DD SDO Input Voltage to GND SDO Output Voltage to GND SCL Input Voltage to GND CT and INT Output Voltage to GND Operating Temperature Range Storage Temperature Range Maximum ...

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Preliminary Technical Data PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 SCL Serial Clock Input. This is the clock input for the serial port. The serial clock is used to clock in and ...

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ADT7410 TYPICAL PERFORMANCE CHARACTERISTICS Figure 6. Temperature Accuracy at 3.3 V and 5 V Figure 7. Operating Supply Current vs. Temperature Figure 8. Average Operating Supply Current vs. Supply Voltage at 30°C Preliminary Technical Data Figure 9. Shutdown Current vs. ...

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Preliminary Technical Data THEORY OF OPERATION CIRCUIT INFORMATION The ADT7410 is a 16-bit digital temperature sensor with the 16 bit acting as the sign bit. An on-board temperature sensor generates a voltage precisely proportional to absolute temperature, which is compared ...

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ADT7410 via the configuration register while the INT and CT pins are also programmable for interrupt mode via the configuration register. ONE-SHOT MODE Setting Bit and Bit the configuration register enables the one-shot ...

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Preliminary Technical Data TEMPERATURE 149°C 148°C 147°C 146°C 145°C 144°C 143°C 142°C 141°C 140°C CT PIN POLARITY = ACTIVE LOW CT PIN POLARITY = ACTIVE HIGH WRITE TO D5 AND D6 OF CONFIGURATION *THERE IS A 240ms DELAY BETWEEN WRITING ...

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ADT7410 SHUTDOWN The ADT7410 can be placed in shutdown mode via the configuration register, in which case the entire IC is shut down and no further conversions are initiated until the ADT7410 is taken out of shutdown mode. The ADT7410 ...

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Preliminary Technical Data REGISTERS The ADT7410 contains thirteen registers: • Nine temperature registers • One status register • One ID register • One configuration register • One address pointer register All registers are 8 bits wide. The temperature value register, ...

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ADT7410 STATUS REGISTER This 8-bit read-only register reflects the status of the over temperature and under temperature interrupts that can cause the CT and INT pins to go active. It also reflects the status of a temperature conversion operation. The ...

Page 15

Preliminary Technical Data T SETPOINT REGISTERS HIGH The T MSB and T LSB registers store the over temperature limit value. An over temperature event occurs when the temperature HIGH HIGH value stored in the temperature value register exceeds the value ...

Page 16

ADT7410 T SETPOINT REGISTER HYST This 8-bit read/write register stores the temperature hysteresis value for the T hysteresis value is stored in straight binary format using the four LSBs. Increments are possible in steps of 1°C from 0°C to +15°C. ...

Page 17

Preliminary Technical Data SERIAL INTERFACE Control of the ADT7410 is carried out via the I compatible serial interface. The ADT7410 is connected to this bus as a slave and is under the control of a master device. 2 Figure 14 ...

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ADT7410 WRITING DATA Depending on the register being written to, there are two different write transactions for the ADT7410. Writing to the Address Pointer Register for a Subsequent Read To read data from a particular register, the address pointer register ...

Page 19

Preliminary Technical Data 1 SCL SDA START BY MASTER FRAME 1 SERIAL BUS ADDRESS BYTE 1 SCL (CONTINUED) SDA (CONTINUED) D15 D14 D13 Figure 17. Writing to the Address Pointer Register Followed by Two Bytes ...

Page 20

ADT7410 1 SCL SDA START BY MASTER SERIAL BUS ADDRESS BYTE D15 D14 R/W ACK. BY ADT7410 FRAME 1 1 SCL (CONTINUED) SDA (CONTINUED LSB DATA BYTE FROM ...

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Preliminary Technical Data INT & CT OUTPUTS The INT and CT pins are open drain and require a pull-up resistor to VCC. INT OVERTEMPERATURE MODES The ADT7410 INT and CT pins have two temperature interrupt modes, comparator mode and interrupt ...

Page 22

ADT7410 (COMPARATOR MODE) POLARITY = ACTIVE LOW (INTERRUPT MODE) POLARITY = ACTIVE LOW (COMPARATOR MODE) POLARITY = ACTIVE HIGH (INTERRUPT MODE) POLARITY = ACTIVE HIGH Figure 21. INT Output Temperature Response Diagram for T TEMPERATURE -13°C -14°C -15°C -16°C -17°C ...

Page 23

Preliminary Technical Data APPLICATION INFORMATION THERMAL RESPONSE TIME The time required for a temperature sensor to settle to a specified accuracy is a function of the thermal mass of the sensor and the thermal conductivity between the sensor and the ...

Page 24

... ADT7410 OUTLINE DIMENSIONS ORDERING GUIDE Model Temperature Range 2 ADT7410Z –55°C to +150°C 1 Temperature accuracy is over the 0°C to +70°C temperature range RoHS Compliant Part. 5.00 (0.1968) 4.80 (0.1890 6.20 (0.2440) 4.00 (0.1574) 5.80 (0.2284) 3.80 (0.1497 1.27 (0.0500) BSC 1.75 (0.0688) 1.35 (0.0532) 0.25 (0.0098) 0.10 (0.0040) 0.51 (0.0201) COPLANARITY 0 ...

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Preliminary Technical Data NOTES Rev. PrE | Page ADT7410 ...

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ADT7410 NOTES Preliminary Technical Data Rev. PrE | Page ...

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... C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I 2 Rights to use these components system, provided that the system conforms to the I ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. PR06560-0-9/08(PrE Standard Specification as defined by Philips ...

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