ADT7301ART-500RL7 Analog Devices, ADT7301ART-500RL7 Datasheet

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ADT7301ART-500RL7

Manufacturer Part Number
ADT7301ART-500RL7
Description
Manufacturer
Analog Devices
Datasheet
FEATURES
13-bit temperature-to-digital converter
−40°C to +150°C operating temperature range
±0.5°C typical accuracy
0.03125°C temperature resolution
Shutdown current of 1 μA
Power dissipation of 0.631 mW at V
SPI- and DSP-compatible serial interface
Shutdown mode
Space-saving SOT-23 and MSOP packages
Compatible with AD7814
APPLICATIONS
Medical equipment
Automotive
Cellular phones
Hard disk drives
Personal computers
Electronic test equipment
Office equipment
Domestic appliances
Process control
GENERAL DESCRIPTION
The ADT7301 is a complete temperature monitoring system
available in SOT-23 and MSOP packages. It contains a band gap
temperature sensor and a 13-bit ADC to monitor and digitize
the temperature reading to a resolution of 0.03125°C.
The ADT7301 has a flexible serial interface that allows easy
interfacing to most microcontrollers. The interface is compati-
ble with SPI
DSPs. The part features a standby mode that is controlled via
the serial interface. The ADT7301’s wide supply voltage range,
low supply current, and SPI-compatible interface make it ideal
for a variety of applications including personal computers,
office equipment, automotive, and domestic appliances. The
ADT7301 is rated for operation over the −40°C to +150°C
temperature range. It is not recommended to operate the device
at temperatures above +125°C for greater than a total of 5%
(5,000 hours) of the lifetime of the device. Exposure beyond this
limit affects device reliability.
Rev. 0
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.
Environmental controls
Oil temperature
Hydraulic systems
®
, QSPI
, and MICROWIRE
DD
= 3.3 V
protocols as well as
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
5.
6.
7.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
GND
On-chip temperature sensor that allows an accurate
measurement of the ambient temperature. The measurable
temperature range is −40°C to +150°C.
Supply voltage of 2.7 V to 5.25 V.
Space-saving 6-lead SOT-23 and 8-lead MSOP packages.
Typical temperature accuracy of ±0.5°C.
13-bit temperature reading to 0.03125°C resolution.
Shutdown mode that reduces the power consumption to
4.88 μW with V
Compatible with AD7814.
Digital Temperature Sensor
ADT7301
FUNCTIONAL BLOCK DIAGRAM
TEMPERATURE
BAND GAP
SENSOR
±1°C Accurate, 13-Bit,
DD
© 2005 Analog Devices, Inc. All rights reserved.
= 3.3 V @ 1 SPS.
INTERFACE
SERIAL
BUS
Figure 1.
ANALOG/DIGITAL
TEMPERATURE
CONVERTER
REGISTER
13-BIT
VALUE
ADT7301
www.analog.com
V
CS
SCLK
DIN
DOUT
DD

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ADT7301ART-500RL7 Summary of contents

Page 1

... Rev. 0 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 ...

Page 2

ADT7301 TABLE OF CONTENTS Specifications..................................................................................... 3 Timing Characteristics ................................................................ 4 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin Configurations and Function Descriptions ........................... 6 Typical Performance Characteristics ............................................. 7 Theory of Operation ........................................................................ 9 Converter Details.......................................................................... 9 REVISION HISTORY 10/05—Revision ...

Page 3

SPECIFICATIONS 2 5.25 V, unless otherwise noted. All specifications for –40°C to +150°C, unless otherwise noted. A MIN MAX DD Table 1. A Grade Specifications Parameter TEMPERATURE SENSOR AND ADC ...

Page 4

ADT7301 TIMING CHARACTERISTICS Guaranteed by design and characterization, not production tested. All input signals are specified with (10 and timed from a voltage level of 1 Table 2. ...

Page 5

ABSOLUTE MAXIMUM RATINGS Table 3. Parameter V to GND DD Digital Input Voltage to GND Digital Output Voltage to GND 1 Operating Temperature Range Storage Temperature Range Junction Temperature 6-Lead SOT-23 (RT-6) 2 Power Dissipation Thermal Impedance θ , Junction-to-Ambient ...

Page 6

ADT7301 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS 1 6 GND DOUT ADT7301 2 5 DIN CS TOP VIEW (Not to Scale SCLK DD Figure 4. SOT-23 Pin Configuration Table 4. Pin Function Descriptions SOT-23 MSOP Pin No. Pin ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS 215 210 5.5V 205 200 195 190 3.3V 185 180 175 170 – TEMPERATURE (°C) Figure 6. Average Operating Supply Current vs. Temperature 205 200 195 190 185 180 175 2.5 3.0 3.5 4.0 4.5 ...

Page 8

ADT7301 5 4 UPPER TEMPERATURE ERROR LIMIT –1 –2 –3 LOWER TEMPERATURE ERROR LIMIT –4 –5 TEMPERATURE (°C) Figure 11. Temperature Accuracy of 40 ADT7301s @ 3 UPPER TEMPERATURE ERROR LIMIT 3 2 ...

Page 9

THEORY OF OPERATION The ADT7301 is a 13-bit digital temperature sensor with a 14 bit that acts as a sign bit. The part houses an on-chip temperature sensor, a 13-bit A/D converter, a reference circuit, and serial interface logic functions ...

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ADT7301 TEMPERATURE VALUE REGISTER The temperature value register is a 14-bit read only register that stores the temperature reading from the ADC in 13-bit twos complement format plus a sign bit. The MSB (DB13) is the sign bit. The ADC ...

Page 11

SCLK 1 2 DOUT LEADING ZEROS DIN SERIAL INTERFACE The serial interface on the ADT7301 consists of four wires SCLK, DIN, and DOUT. The interface can be operated in 3-wire mode with DIN tied to ...

Page 12

ADT7301 APPLICATIONS MICROPROCESSOR INTERFACING The ADT7301 serial interface allows easy interface to most microcomputers and microprocessors. Figure 15 to Figure 18 show some typical interface circuits. The serial interface on the ADT7301 consists of four wires DIN, DOUT, ...

Page 13

The following software program shows how to program a PIC16F873 to communicate with the ADT7301. The PIC16F873 is configured as an SPI master with the Port A.1 pin used Any microchip microcontroller can use this program by ...

Page 14

ADT7301 ADT7301-to-ADSP-21xx Interface Figure 18 shows an interface between the ADT7301 and the ADSP-21xx DSP processor. To ensure correct operation of the interface, the SPORT control register should be set up as follows: TFSW = RFSW = 1, alternate framing ...

Page 15

... SEATING 0.30 PLANE COMPLIANT TO JEDEC STANDARDS MO-178AB Figure 19. 6-Lead Small Outline Transistor Package [SOT-23] (RT-6) Dimensions shown in millimeters ORDERING GUIDE Model Temperature Range ADT7301ART-500RL7 −40°C to +150°C ADT7301ARTZ-500RL7 2 −40°C to +150°C 2 ADT7301ARTZ-REEL7 −40°C to +150°C ADT7301ARMZ 2 −40°C to +150°C ...

Page 16

... ADT7301 NOTES © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D02884–0–10/05(0) Rev Page ...

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