MCP9802A0T-M/OT Microchip Technology, MCP9802A0T-M/OT Datasheet - Page 16

• Manufacturer Part Number: MCP9802A0T-M/OT
• Description: IC TEMP SNSR 12BIT 2WIRE SOT23-5
• Manufacturer: Microchip Technology

Specifications of MCP9802A0T-M/OT

• Package / Case: SOT-23-5, SC-74A, SOT-25
• Output Type: I²C™/SMBus™
• Function: Temp Monitoring System (Sensor)
• Topology: ADC (Sigma Delta), Register Bank
• Sensor Type: Internal
• Sensing Temperature: -55°C ~ 125°C
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Full Temp Accuracy: 2 C
• Digital Output - Number Of Bits: 12 bit
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 10 C
• Supply Current: 200 uA
• Ic Output Type: Digital
• Sensing Accuracy Range: ± 0.5°C
• Temperature Sensing Range: -55°C To +125°C
• Supply Voltage Range: 2.7V To 5.5V
• Resolution (bits): 12bit
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: MCP9802A0T-M/OTTR

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