MCP9800/1/2/3
2-Wire High-Accuracy Temperature Sensor
Features:
Description:
• Temperature-to-Digital Converter
• Accuracy with 12-bit Resolution:
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.
- ±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: I2C™/SMBus Compatible
• Operating Current: 200 µA (typical)
• Shutdown Current: 1 µA (maximum)
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,
or as temperature event interrupt output for
microprocessor-based systems.
• Power-saving One-shot Temperature
Measurement
• Available Packages: SOT-23-5, MSOP-8, SOIC-8
Typical Applications:
• Personal Computers and Servers
• Hard Disk Drives and Other PC Peripherals
• Entertainment Systems
This sensor has an industry standard 2-wire, I2C™/
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
• Office Equipment
• Data Communication Equipment
• Mobile Phones
sophisticated
applications.
multi-zone
temperature-monitoring
• General Purpose Temperature Monitoring
Package Types
Typical Application
MCP9800
MCP9802
MCP9801
MCP9803
VDD
PIC®
Microcontroller
SOT-23-5
V
SOIC, MSOP
MCP9800/02
R
V
SDA
SDA
5
1
2
3
4
8
7
6
5
DD 1
DD
PIC16F737
VDD
SCLK
A0
GND
1
2
3
5
2
3
SDA
A1
A2
SCLK
ALERT
4
GND
ALERT
GND
SCLK
ALERT
4
I/O Port
RPULL-UP
MCP9800/02A0: A2, A1, A0 are internally set to (0, 0, 0)
MCP9800/02A5: A2, A1, A0 are internally set to (1, 0, 1)
MCP9802/03: Serial Bus time-out 35 ms (typ.)
2010 Microchip Technology Inc.
DS21909C-page 1