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AD7415ARTZ-1500RL7

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
±0.5°C Accurate, 10-Bit Digital
Temperature Sensors in SOT-23
AD7414/AD7415
Rev. F
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2001–2010 Analog Devices, Inc. All rights reserved.
FEATURES
10-bit temperature-to-digital converter
Temperature range: −40°C to +125°C
Typical accuracy of ±0.5°C at +40°C
SMBus/I
2
C®-compatible serial interface
3 μA power-down current
Temperature conversion time: 29 μs typ
Space-saving 6-lead (AD7414) and 5-lead (AD7415)
SOT-23 packages
Pin selectable addressing via AS
Overtemperature indicator (AD7414 Only)
SMBus alert function (AD7414 only)
4 versions allow 8 I
2
C addresses (AD7414)
2 versions allow 6 I
2
C addresses (AD7415)
APPLICATIONS
Hard disk drives
Personal computers
Electronic test equipment
Office equipment
Domestic appliances
Process control
Cellular phones
GENERAL DESCRIPTION
The AD7414/AD7415 are complete temperature monitoring
systems in 6-lead and 5-lead SOT-23 packages. They contain a
band gap temperature sensor and a 10-bit ADC to monitor and
digitize the temperature reading to a resolution of 0.25°C.
The AD7414/AD7415 provide a 2-wire serial interface that is
compatible with SMBus and I
2
C interfaces. The parts come in four
versions: the AD7414/AD7415-0, AD7414/AD7415-1, AD7414-2,
and AD7414-3. The AD7414/AD7415-0 and AD7414/AD7415-1
versions provide a choice of three different SMBus addresses for
each version. All four AD7414 versions give the possibility of eight
different I
2
C addresses while the two AD7415 versions allow up to
six I
2
C addresses to be used.
The AD7414/AD7415’s 2.7 V supply voltage, low supply current,
serial interface, and small package size make them ideal for a
variety of applications, including personal computers, office
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
FUNCTIONAL BLOCK DIAGRAM
SDA
SCL
V
DD
SMBus/I
2
C
INTERFACE
10-BIT
ANALOG-DIGITAL
CONVERTER
BAND GAP
TEMPERATURE
SENSOR
CONFIGURATION
REGISTER
TEMPERATURE
VALUE
REGISTER
AD7415
AS
GND
AS
GND
SDA
SCL
T
LOW
SETPOINT
REGISTER
SETPOINT
COMPARATOR
ALERT
V
DD
AD7414
SMBus/I
2
C
INTERFACE
10-BIT
ANALOG-DIGITAL
CONVERTER
BAND GAP
TEMPERATURE
SENSOR
CONFIGURATION
REGISTER
TEMPERATURE
VALUE
REGISTER
T
HIGH
SETPOINT
REGISTER
02463-001
Figure 1.
limit is exceeded. A configuration register allows programming of
the state of the ALERT output (active high or active low). This
output can be used as an interrupt or as an SMBus alert.
PRODUCT HIGHLIGHTS
1. On-chip temperature sensor. The sensor allows an accurate
measurement of the ambient temperature to be made. It is
capable of ±0.5°C temperature accuracy.
2. SMBus/I
2
C-compatible serial interface. The interface offers pin
selectable choice of three addresses per version of the
AD7414/AD7415, eight address options in total for the AD7414,
and six in total for the AD7415.
3. Supply voltage of 2.7 V to 5.5 V.
4. Space-saving 5-lead and 6-lead SOT-23 packages.
5. 10-bit temperature reading to 0.25°C resolution.
6. Overtemperature indicator. This indicator can be software
disabled. It is used as an interrupt of SMBus alert.
7. One-shot and automatic temperature conversion rates.
AD7414/AD7415
Rev. F | Page 2 of 20
TABLE OF CONTENTS
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 5
ESD Caution .................................................................................. 5
Pin Configurations and Function Descriptions ............................ 6
Theory of Operation ......................................................................... 7
Circuit Information ...................................................................... 7
Functional Description................................................................. 7
Measurement Technique .............................................................. 7
Temperature Data Format ............................................................ 8
Internal Register Structure ............................................................... 9
Address Pointer Register .............................................................. 9
Configuration Register (Address 0X01) ..................................... 9
Temperature Value Register (Address 0X00) ........................... 10
AD7414 T
HIGH
Register (Address 0X02) ................................... 10
AD7414 T
LOW
Register (Address 0X03) .................................... 10
Serial Interface ................................................................................. 12
Serial Bus Address ....................................................................... 12
Write Mo de .................................................................................. 12
Read Mode ................................................................................... 12
SMBUS ALERT............................................................................. 13
Power-On Defaults ..................................................................... 13
Operating Modes ........................................................................ 13
Power vs. Throughput ................................................................ 14
Mounting the AD7414/AD7415 ............................................... 14
Supply Decoupling ...................................................................... 14
Temperature Accuracy vs. Supply ............................................. 15
Typical Temperature Error Graph ............................................ 15
Outline Dimensions ........................................................................ 16
Ordering Guide ........................................................................... 18
REVISION HISTORY
11/10—Rev. E to Rev. F
Added Data Hold Time, t
7
Parameter, Table 1 .............................. 4
Changes to Figure 2 ........................................................................... 4
Updated to Outline Dimensions ................................................... 16
Changes to Ordering Guide ........................................................... 18
4/05—Rev. D to Rev. E
Updated Format .................................................................. Universal
Changes to Absolute Maximum Ratings ........................................ 6
Changes to Figure 6 ........................................................................... 7
Changes to Ordering Guide ........................................................... 17
9/04—Rev. C to Rev. D.
Changes to Absolute Maximum Ratings ........................................ 3
Updated Ordering Guide ................................................................. 4
8/03—Rev. B to Rev. C.
Change to Temperature Range ......................................... Universal
Updated Features ............................................................................... 1
Updated Specifications ..................................................................... 2
Updated Absolute Maximum Ratings ............................................ 3
Updated Ordering Guide ................................................................. 4
Updated Circuit Information .......................................................... 5
Updated Temperature Data Format................................................ 6
Updated Temperature Value Register ............................................. 8
Updated Figure 14 ........................................................................... 11
Updated Outline Dimensions ........................................................ 12
11/02—Rev. A to Rev. B.
Changes to Absolute Maximum Ratings........................................ 3
10/02—Rev. 0 to Rev. A.
Changes to Specifications ................................................................ 2
Changes to Pin Function Descriptions .......................................... 3
Changes to Absolute Maximum Ratings........................................ 3
Ordering Guide Updated ................................................................. 4
Change to Figure 2 ............................................................................ 5
Added to Typical Temperature
Error Graph section ........................................................................ 11
Added Figure 15 .............................................................................. 11
Outline Dimensions updated ........................................................ 12
7/01—Revision 0: Initial Version
AD7414/AD7415
Rev. F | Page 3 of 20
SPECIFICATIONS
T
A
= T
MIN
to T
MAX
, V
DD
= 2.7 V to 5.5 V, unless otherwise noted. Temperature range as follows: A version = −40°C to +125°C.
Table 1.
Parameter A Version Unit Test Conditions/Comments
TEMPERATURE SENSOR AND ADC
Accuracy
1
±0.5 °C typ V
DD
= 3 V @ +40°C
−0.87 to +0.82
2
°C max V
DD
= 3 V @ +40°C
±1.5 °C max V
DD
= 3 V @ −40°C to +70°C
±2.0 °C max V
DD
= 3 V @ −40°C to +85°C
±3.0 °C max V
DD
= 3 V @ −40°C to +125°C
±2.0 °C typ V
DD
= 3 V @ −40°C to +125°C
±1.87
2
°C max V
DD
= 5.5 V @ +40°C
±2.0 °C typ V
DD
= 5.5 V @ −40°C to +85°C
±3.0 °C max V
DD
= 5.5 V @ −40°C to +85°C
±3.0 °C typ V
DD
= 5.5 V @ −40°C to +125°C
Resolution 10 Bits
Update Rate, t
R
800 ms typ
Temperature Conversion Time 25 μs typ
POWER SUPPLIES
Supply Current
3
Peak Supply Current
4
1.2 mA typ Current during conversion
Supply Current – Nonconverting 900 μA max Peak current between conversions
Inactive Serial Bus
5
Normal Mode @ 3 V 169 μA typ
Supply current with serial bus inactive. Part not
converting and D7 of configuration register = 0.
Normal Mode @ 5 V 188 μA typ
Active Serial Bus
6
Normal Mode @ 3 V 180 μA typ
Supply current with serial bus active. Part not
converting and D7 of configuration register = 0.
D7 of configuration register = 1. Typical values
are 0.04 μA at 3 V and 0.5 μA at 5 V.
Normal Mode @ 5 V 214 μA typ
Shutdown Mode 3 μA max
DIGITAL INPUT
Input High Voltage, V
IH
2.4 V min
Input Low Voltage, V
IL
0.8 V max
Input Current, I
IN
7
±1 μA max V
IN
= 0 V to V
DD
Input Capacitance, C
IN
10 pF max All digital inputs
DIGITAL OUTPUT (OPEN-DRAIN)
Output High Voltage, V
OH
2.4 V min
Output Low Voltage, V
OL
0.4 V max I
OL
= 1.6 mA
Output High Current, I
OH
1 μA max V
OH
= 5 V
Output Capacitance, C
OUT
10 pF max Typ = 3 pF
ALERT Output Saturation Voltage 0.8 V max I
OUT
= 4 mA
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

AD7415ARTZ-1500RL7

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Buy AD7415ARTZ-1500RL7
Manufacturer:
Analog Devices Inc.
Description:
Board Mount Temperature Sensors SMBus/12C 10bit Digital Output
Lifecycle:
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