MCP9800 Datasheet, PDF (1/42 Pages) Microchip Technology – 2-Wire High-Accuracy Temperature Sensor

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: I²C™/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:
• Personal Computers and Servers
• Hard Disk Drives and Other PC Peripherals
• Entertainment Systems
• Office Equipment
• Data Communication Equipment
• Mobile Phones
• General Purpose Temperature Monitoring
Typical Application
V_DD
MCP9800/02 _R
V_{DD 1}
GND 2
ALERT 3
5 _SDA
4 ^SCLK
R_PULL-UP
PIC^®
Microcontroller
PIC16F737
I/O Port
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,
or as temperature event interrupt output for
microprocessor-based 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
sophisticated multi-zone temperature-monitoring
applications.
Package Types
MCP9800
MCP9802
SOT-23-5
V_{DD 1}
5 SDA
GND 2
ALERT 3
4 SCLK
MCP9801
MCP9803
SOIC, MSOP
SDA 1
SCLK 2
8 ^VDD
7 ^A0
ALERT ³
GND 4
6 ^A1
5 ^A2
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