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MCP9800/1/2/3
2-Wire High-Accuracy Temperature Sensor
Features:
? Temperature-to-Digital Converter
? Accuracy with 12-bit Resolution:
- ±0.5°C (typical) at +25°C
- ±1°C (maximum) from -10°C to +85°C
- ±2°C (maximum) from -10°C to +125°C
- ±3°C (maximum) from -55°C to +125°C
? User-selectable Resolution: 9-12 bit
? Operating Voltage Range: 2.7V to 5.5V
? 2-wire Interface: I 2 C?/SMBus Compatible
? Operating Current: 200 μA (typical)
? Shutdown Current: 1 μA (maximum)
? Power-saving One-shot Temperature
Measurement
? Available Packages: SOT-23-5, MSOP-8, SOIC-8
Typical Applications:
Description:
Microchip Technology Inc.’s MCP9800/1/2/3 family of
digital temperature sensors converts temperatures
between -55°C and +125°C to a digital word. They
provide an accuracy of ±1°C (maximum) from -10°C to
+85°C.
The MCP9800/1/2/3 family comes with
user-programmable registers that provide flexibility for
temperature sensing applications. The register settings
allow user-selectable 9-bit to 12-bit temperature
measurement resolution, configuration of the
power-saving Shutdown and One-shot (single
conversion on command while in Shutdown) modes
and the specification of both temperature alert output
and hysteresis limits. When the temperature changes
beyond the specified limits, the MCP9800/1/2/3 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,
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Personal Computers and Servers
Hard Disk Drives and Other PC Peripherals
Entertainment Systems
Office Equipment
Data Communication Equipment
Mobile Phones
General Purpose Temperature Monitoring
or as temperature event interrupt output for
microprocessor-based systems.
This sensor has an industry standard 2-wire, I 2 C?/
SMBus compatible serial interface, allowing up to eight
devices to be controlled in a single serial bus. These
features make the MCP9800/1/2/3 ideal for
sophisticated multi-zone temperature-monitoring
applications.
Typical Application
Package Types
V DD
PIC ?
Microcontroller
MCP9800
MCP9802
SOT-23-5
MCP9801
MCP9803
SOIC, MSOP
MCP9800/02
R
PIC16F737
V DD 1
5 SDA
SDA 1
8 V DD
V DD 1
GND 2
ALERT 3
5
4
SDA
SCLK
R PULL-UP
I/O Port
GND 2 SCLK 2
ALERT 3 4 SCLK ALERT 3
GND 4
MCP9802/03: Serial Bus time-out 35 ms (typ.)
7 A0
6 A1
5 A2
MCP9800/01: No Serial Bus time-out
? 2010 Microchip Technology Inc.
DS21909D-page 1
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