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?2011 Microchip Technology Inc.
DS25095A-page 1
MCP9808
Features
" Accuracy:
-  ?.25 (typical) from -40癈 to +125癈
-  ?.5癈 (maximum) from -20癈 to 100癈
-  ?癈 (maximum) from -40癈 to +125癈
"  User-Selectable Measurement Resolution:
-  +0.5癈, +0.25癈, +0.125癈, +0.0625癈
"  User-Programmable Temperature Limits:
-  Temperature Window Limit
-  Critical Temperature Limit
"  User-Programmable Temperature Alert Output
"  Operating Voltage Range: 2.7V to 5.5V
"  Operating Current: 200 礎 (typical)
"  Shutdown Current: 0.1 礎 (typical)
"  2-wire Interface: I
2
C"/SMBus Compatible
"  Available Packages: 2x3 DFN-8, MSOP-8
Typical Applications
"  General Purpose
"  Industrial Applications
"  Industrial Freezers and Refrigerators
"  Food Processing
"  Personal Computers and Servers
"  PC Peripherals
"  Consumer Electronics
"  Handheld/Portable Devices
Temperature Accuracy
Description
Microchip    Technology    Inc.s    MCP9808    digital
temperature sensor converts temperatures between
-20癈    and    +100癈    to    a    digital    word    with
?.25癈/?.5癈 (typical/maximum) accuracy.
The MCP9808 comes with user-programmable registers
that    provide    flexibility    for    temperature    sensing
applications.   The   registers   allow   user-selectable
settings such as Shutdown or Low-Power modes and
the specification of temperature Alert window limits and
critical output limits. When the temperature changes
beyond the specified boundary limits, the MCP9808
outputs an Alert signal. The user has the option of setting
the Alert output signal polarity as an active-low or active-
high comparator output for thermostat operation, or as a
temperature Alert interrupt output for microprocessor-
based systems. The Alert output can also be configured
as a critical temperature output only.
This sensor has an industry standard 400 kHz, 2-wire,
SMBus/I
2
C compatible serial interface, allowing up to
eight or sixteen sensors to be controlled with a single
serial bus (see Table 3-2 for available Address codes).
These   features   make   the   MCP9808   ideal   for
sophisticated,    multi-zone,    temperature-monitoring
applications.
Package Types
0%
10%
20%
30%
40%
Temperature Accuracy (癈)
T
A
= -20癈, 25癈, 85癈, 100癈
V
DD
= 3.3V
854 units
8-Pin 2x3 DFN*
1
2
3
4
8-Pin MSOP
8
7
6
5
* Includes Exposed Thermal Pad (EP); see Table 3-1.
A1
A0
A2
SCL
Alert
1
2
3
4
8
7
6
5
GND
SDA
V
DD
EP
9
SCL
Alert
GND
SDA
A1
A0
A2
V
DD
?.5癈 Maximum Accuracy Digital Temperature Sensor
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