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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
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.
Typical Applications
• • • • • • • • General Purpose Industrial Applications Industrial Freezers and Refrigerations Food Processing Personal Computers and Servers PC Peripherals Consumer Electronics Hand-held/Portable Devices
Package Types
8-Pin 2x3 DFN *
SDA 1 8 VDD EP 9 7 A0 6 A1 5 A2 SCL 2 Alert 3 GND 4
Temperature Accuracy
40% 30% Occurrences 20% 10% 0% -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 Temperature Accuracy (°C) 1.0
TA = -40°C to 125°C VDD = 3.3V 2787 units
8-Pin MSOP
SDA 1 SCL 2 Alert 3 GND 4 8 VDD 7 A0 6 A1 5 A2
* Includes Exposed Thermal Pad (EP); see Table 3-1.
© 2009 Microchip Technology Inc.
DS22203A-page 1
MCP9804
www.DataSheet4U.com
NOTES:
DS22203A-page 2
© 2009 Microchip Technology Inc.
MCP9804
www.DataSheet4U.com
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
VDD.................................................................................. 6.0V Voltage at All Input/Output Pins .............. GND – 0.3V to 6.0V Storage Temperature ....................................-65°C to +150°C Ambient Temperature with Power Applied ....-40°C to +125°C Junction Temperature (TJ) .......................................... +150°C ESD Protection on All Pins (HBM:MM) ................ (4 kV:400V) Latch-Up Current at Each Pin (25°C)....................... ±200 mA
†Notice: Stresses above those listed under “Maximum ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.
TEMPERATURE SENSOR DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VDD = 2.7V to 5.5V, GND = Ground, and TA = -40°C to +125°C. Parameters Temperature Sensor Accuracy +40°C < TA ≤ +125°C Temperature Conversion Time 0.5°C/bit 0.25°C/bit 0.25°C/bit 0.25°C/bit Power Supply Operating Voltage Range Operating Current Shutdown Current Power On Reset (POR) Power Supply Rejection, TA = +25°C High-level Current (leakage) Low-level Voltage DFN-8 MSOP-8 IOH VOL tRES VDD IDD ISHDN VPOR Δ°C/ΔVDD 2.7 — — — — — — — — — — 200 0.1 2.2 -0.1 ±0.15 — — 0.7 1.4 5.5 400 2 — — — 1 0.4 — — V µA µA V °C/V °C µA V s s Threshold for falling VDD VDD = 2.7V to 5.5V VDD = 3.3V+150 mVPP AC (0 to 1 MHz) VOH = VDD (Active-Low, Pull-up Resistor) IOL= 3 mA (Active-Low, Pull-up Resistor) Time to 63% (89°C) tCONV — — — — 30 65 130 250 ms ms ms ms 33s/sec (typical) 15s/sec (typical) 7s/sec (typical) 4s/sec (typical) TACY -1.0 ±0.25 +1.0 °C VDD = 3.3V Sym Min Typ Max Unit Conditions
Alert Output (Open-Drain output, external pull-up resistor required), see Section 5.2.3
Thermal Response, from +25°C (Air) to +125°C (oil bath)
© 2009 Microchip Technology Inc.
DS22203A-page 3
MCP9804
www.DataSheet4U.com
DIGITAL INPUT/OUTPUT PIN CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VDD = 2.7V to 5.5V, GND = Ground, and TA = -40°C to +125°C. Parameters Input High-level Voltage Low-level Voltage Input Current Output (SDA) Low-level Voltage High-level Current (leakage) Low-level Current SDA an.