MCP9800A5T-M/OTG Microchip Technology, MCP9800A5T-M/OTG Datasheet - Page 16

IC SENSOR THERMAL 2.7V SOT23-5

MCP9800A5T-M/OTG

Manufacturer Part Number
MCP9800A5T-M/OTG
Description
IC SENSOR THERMAL 2.7V SOT23-5
Manufacturer
Microchip Technology

Specifications of MCP9800A5T-M/OTG

Function
Temp Monitoring System (Sensor)
Topology
ADC (Sigma Delta), Register Bank
Sensor Type
Internal
Sensing Temperature
-55°C ~ 125°C
Output Type
I²C™/SMBus™
Output Alarm
No
Output Fan
Yes
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-55°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SOT-23-5, SC-74A, SOT-25
Temperature Threshold
Programmable
Full Temp Accuracy
3 C
Digital Output - Bus Interface
I2C, SMBus
Digital Output - Number Of Bits
9 bit to 12 bit
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.7 V
Description/function
Lead Free Package Analog
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 55 C
Supply Current
400 uA
For Use With
MCP9800DM-TS1 - DEMO BOARD TEMP SENSOR MCP9800MCP9800DM-PCTL - BOARD DEMO FOR PICTAIL MCP9800
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
MCP9800A5T-M/OTG
MCP9800A5T-MOTGRTR
MCP9800A5T-MOTGTR
MCP9800/1/2/3
5.3.1
The MCP9800/1/2/3 has a 16-bit read-only Ambient
Temperature register that contains 9-bit to 12-bit
temperature data. (0.5°C to 0.0625°C resolutions,
respectively).
complement. The bit assignments, as well as the
corresponding resolution, is shown in the register
assignment below.
The refresh rate of this register depends on the
selected ADC resolution. It takes 30 ms (typical) for
9-bit data and 240 ms (typical) for 12-bit data. Since
this register is double-buffered, the user can read the
register
Analog-to-Digital conversion in the background. The
decimal code to ambient temperature conversion is
shown in
REGISTER 5-2:
DS21909D-page 16
bit 15
bit 7
Legend:
R = Readable bit
-n = Value at POR
Note 1:
Upper Half:
Lower Half:
2
-1
Sign
R-0
R-0
°C/bit
Equation
while
When the 0.5°C, 0.25°C or 0.125°C resolutions are selected, bit 6, bit 7 or bit 8 will remain clear <0>,
respectively.
AMBIENT TEMPERATURE
REGISTER (T
This
5-2:
the
2
2
R-0
R-0
-2
6
data is
AMBIENT TEMPERATURE REGISTER (T
°C
°C
MCP9800/1/2/3
A
)
W = Writable bit
‘1’ = Bit is set
formatted
2
2
R-0
R-0
-3
5
°C
°C
in
performs
2
two’s
2
R-0
R-0
-4
4
°C
°C
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
2
EQUATION 5-2:
R-0
R-0
3
Where:
0
°C
A
) – ADDRESS <
Code = MCP9800 output in decimal
T
A
2
R-0
R-0
2
0
= Ambient Temperature (°C)
°C
T
A
=
 2010 Microchip Technology Inc.
Code 2
x = Bit is unknown
0000 0000
2
R-0
R-0
1
0
°C
4
>b
2
R-0
R-0
0
0
°C
bit 8
bit 0

Related parts for MCP9800A5T-M/OTG