MCP9804 Datasheet, PDF (1/54 Pages) Microchip Technology – ±0.25°C Typ. Accuracy Digital Temperature Sensor

MCP9804
±0.25°C Typ. Accuracy Digital Temperature Sensor
Features
• Accuracy:
- ±0.25°C (typical) from -40°C to +125°C
- ±1°C (maximum) from -40°C to +125°C
• User Selectable Measurement Resolution:
- 0.5°C, 0.25°C, 0.125°C, 0.0625°C
• 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 µA (typical)
• Shutdown Current: 0.1 µA (typical)
• 2-wire Interface: I²C/SMBus Compatible
• Available Packages: 2x3 DFN-8, MSOP-8
Typical Applications
• General Purpose
• Industrial Applications
• Industrial Freezers and Refrigerations
• Food Processing
• Personal Computers and Servers
• PC Peripherals
• Consumer Electronics
• Hand-held/Portable Devices
Temperature Accuracy
40%
30%
T_A = -40°C to 125°C
V_DD = 3.3V
2787 units
20%
10%
0%
Temperature Accuracy (°C)
Description
Microchip Technology Inc.’s MCP9804 digital
temperature sensor converts temperatures between
-40°C and +125°C to a digital word with ±0.25°C/±1°C
(typical/maximum) accuracy.
The MCP9804 comes with user-programmable
registers that provide flexibility 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 MCP9804
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 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 100 kHz 2-wire,
SMBus/I²C 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 MCP9804 ideal for
sophisticated multi-zone temperature-monitoring
applications.
Package Types
8-Pin 2x3 DFN *
SDA 1
8 V_DD
SCL 2 _EP 7 A0
Alert 3 ⁹ 6 A1
GND 4
5 A2
8-Pin MSOP
SDA 1
8 ^VDD
SCL 2
7 A0
Alert ³
6 A1
GND 4
5 A2
* Includes Exposed Thermal Pad (EP); see Table 3-1.
© 2009 Microchip Technology Inc.
DS22203A-page 1