AD7314ARM-REEL Analog Devices Inc, AD7314ARM-REEL Datasheet

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AD7314ARM-REEL

Manufacturer Part Number
AD7314ARM-REEL
Description
IC SENSOR TEMP 10BIT DGTL 8-MSOP
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD7314ARM-REEL

Rohs Status
RoHS non-compliant
Function
Temp Monitoring System (Sensor)
Topology
ADC, Register Bank
Sensor Type
Internal
Sensing Temperature
-35°C ~ 85°C
Output Type
MICROWIRE™, QSPI™, SPI™
Output Alarm
No
Output Fan
No
Voltage - Supply
2.65 V ~ 5.5 V
Operating Temperature
-35°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,

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a
GENERAL DESCRIPTION
The AD7314 is a complete temperature monitoring system in
an 8-lead MSOP package. It contains a band gap temperature
sensor and 10-bit ADC to monitor and digitize the temperature
reading to a resolution of 0.25∞C.
The AD7314 has a flexible serial interface that allows easy
interfacing to most microcontrollers. The interface is compat-
ible with SPI, QSPI™, and MICROWIRE™ protocols and is
also compatible with DSPs. The part features a standby mode
that is controlled via the serial interface.
The AD7314’s low supply current and SPI compatible interface
make it ideal for a variety of applications, including personal
computers, office equipment, and domestic appliances.
REV. A
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
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
FEATURES
10-Bit Temperature-to-Digital Converter
–35 C to +85 C Operating Temperature Range
SPI
Shutdown Mode
Space-Saving MSOP Package
APPLICATIONS
Hard Disk Drives
Personal Computers
Electronic Test Equipment
Office Equipment
Domestic Appliances
Process Control
Mobile Phones
2 C Accuracy
®
and DSP Compatible Serial Interface
Low Voltage, 10-Bit Digital Temperature
PRODUCT HIGHLIGHTS
1. The AD7314 has an on-chip temperature sensor that allows
2. Supply voltage of 2.65 V to 5.5 V.
3. Space-saving 8-lead MSOP package.
4. 10-bit temperature reading to 0.25∞C resolution.
5. The AD7314 features a standby mode that reduces the
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
an accurate measurement of the ambient temperature. The
measurable temperature range is –35∞C to +85∞C, with a
± 2∞C temperature accuracy.
current consumption to 1 mA max.
GND
FUNCTIONAL BLOCK DIAGRAM
TEMPERATURE
BAND GAP
AD7314
SENSOR
Sensor in 8-Lead MSOP
© 2003 Analog Devices, Inc. All rights reserved.
INTERFACE
ANALOG-TO-DIGITAL
SERIAL
TEMPERATURE
BUS
CONVERTER
REGISTER
VALUE
10-BIT
AD7314
www.analog.com
CE
SCLK
SDI
SDO
ID
V
DD

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AD7314ARM-REEL Summary of contents

Page 1

FEATURES 10-Bit Temperature-to-Digital Converter – +85 C Operating Temperature Range 2 C Accuracy ® SPI and DSP Compatible Serial Interface Shutdown Mode Space-Saving MSOP Package APPLICATIONS Hard Disk Drives Personal Computers Electronic Test Equipment Office Equipment Domestic ...

Page 2

AD7314–SPECIFICATIONS Parameter TEMPERATURE SENSOR AND ADC Accuracy Resolution Update Rate Temperature Conversion Time SUPPLIES Supply Voltage Supply Current Normal Mode (Inactive) Normal Mode (Active) Shutdown Mode Power Dissipation Power Dissipation 1 SPS 10 SPS 100 SPS DIGITAL INPUT ...

Page 3

... If the application complies with this recommendation, the ID pin will never see –70 mA. Temperature Model Range AD7314ARM –35°C to +85°C AD7314ARM-REEL –35°C to +85°C AD7314ARM-REEL7 –35°C to +85°C AD7314ARMZ* –35°C to +85°C AD7314ARMZ-REEL* –35°C to +85°C AD7314ARMZ-REEL7* –35°C to +85° Lead Free. CAUTION ESD (electrostatic discharge) sensitive device ...

Page 4

AD7314 Pin No. Mnemonic Description Connect Chip Enable Input. The device is selected when this input is high. The SCLK input is disabled when this pin is low. 3 SCLK Serial Clock Input. This is ...

Page 5

CIRCUIT INFORMATION The AD7314 is a 10-bit digital temperature sensor. The part houses an on-chip temperature sensor, a 10-bit A/D converter, and reference and serial interface logic functions in an MSOP package. The A/D converter section consists of a conventional ...

Page 6

AD7314 CE SCLK LEADING SDO ZERO DON'T SDI CARE Write Operation Figure 3 also shows the interface diagram for a serial write to the AD7314. The write operation takes place at the same time as the read ...

Page 7

SUPPLY DECOUPLING The AD7314 should at least be decoupled with a 0.1 mF ceramic capacitor between V and GND. This is particularly important DD if the AD7314 is mounted remote from the power supply. TYPICAL TEMPERATURE ERROR GRAPHS Figure 6 ...

Page 8

AD7314 Revision History Location 10/03—Data Sheet changed from REV REV. A. Change to PRODUCT HIGHLIGHTS . . . . . . . . . . . . . . . . . . . . . . . ...

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