MCP9808
5.0
FUNCTIONAL DESCRIPTION
The MCP9808 temperature sensors consist of a band-
gap-type temperature sensor, a Delta-Sigma Analog-to-
Digital Converter (ΔΣ ADC), user-programmable
registers and a 2-wire SMBus/I2C protocol compatible
serial interface. Figure 5-1 shows a block diagram of the
register structure.
Hysteresis
Shutdown
Critical Trip Lock
Alarm Win. Lock
Clear Alert
Alert Status
Output Control
Critical Alert Only
Alert Polarity
Band Gap
Temperature
Sensor
Alert Comp/Int
Configuration
Temperature
TUPPER Limit
ΔΣ ADC
TLOWER Limit
TCRITICALLimit
Manufacturer ID
Device ID/Rev
+0.5°C
+0.25°C
+0.125°C
+0.0625°C
Resolution
Register
Pointer
SMBus/Standard I2C™
Interface
V
GND
SCL
SDA
A0
Alert
A2
DD
A1
FIGURE 5-1:
Functional Block Diagram.
© 2011 Microchip Technology Inc.
DS25095A-page 15
MICROCHIP [ MICROCHIP ]
