MCP98243-BE/MC Microchip Technology, MCP98243-BE/MC Datasheet - Page 26

• Manufacturer Part Number: MCP98243-BE/MC
• Description: IC TEMP SENSOR 3V 2WIRE 8-DFN
• Manufacturer: Microchip Technology

Specifications of MCP98243-BE/MC

• Package / Case: 8-DFN
• Output Type: I²C™/SMBus™
• Function: Temp Monitoring System (Sensor)
• Topology: ADC (Sigma Delta), Register Bank
• Sensor Type: Internal
• Sensing Temperature: -40°C ~ 125°C
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Full Temp Accuracy: +/- 3 C
• Digital Output - Bus Interface: Serial (2-Wire, I2C)
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Ic Output Type: Digital
• Sensing Accuracy Range: ± 0.5°C
• Temperature Sensing Range: -40°C To +125°C
• Supply Current: 200µA
• Supply Voltage Range: 2.7V To 5.5V
• Sensor Case Style: DFN
• No. Of Pins: 8
• Rohs Compliant: Yes
• Resolution (bits): 8bit
• Supply Voltage Min: 3V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

MCP9843/98243
5.1.4
The MCP9843/98243 device uses a band gap
temperature sensor circuit to output analog voltage
proportional to absolute temperature. An internal ΔΣ
ADC is used to convert the analog voltage to a digital
word. The converter resolution is set to 0.25°C + sign
(11-bit data). The digital word is loaded to a 16-bit read-
only Ambient Temperature register
11-bit temperature data in two’s complement format.
The T
Therefore, the user can access the register while, in the
background, the MCP9843/98243 performs an analog-
to-digital conversion. The temperature data from the ΔΣ
ADC is loaded in parallel to the T
refresh rate.
REGISTER 5-5:
DS22153C-page 26
bit 15
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 15
bit 14
bit 13
bit 12
bit 11-0
T
A
Note 1: Bits 15, 14 and 13 are not affected by the status of the Event output configuration (bits 5 to 0 of CONFIG)
vs. T
2
R-0
R-0
A
3
register bits (bits 12 thru 0) are double-buffered.
°C
2: Bits 2, 1, and 0 may remain clear '0' depending on the status of the resolution register
CRIT
AMBIENT TEMPERATURE
REGISTER (T
(Register
The Power-up default is 0.25°C/bit, bits 1 and 0 remain clear '0'.
T
T
0 = T
1 = T
T
0
1 =
T
0 =
1 =
SIGN Bit:
0 =
1 =
Ambient Temperature (T
12-bit Ambient Temperature data in two’s complement format.
A
A
A
A
=
vs. T
vs. T
vs. T
vs. T
2
R-0
R-0
2
T
T
T
T
T
T
5-3).
AMBIENT TEMPERATURE REGISTER (T
°C
A
A
A
A
A
A
A
A
UPPER
CRIT
UPPER
LOWER
< T
≥ T
≤ T
> T
≥ T
< T
≥ 0°C
< 0°C
A
CRIT
CRIT
UPPER
UPPER
LOWER
LOWER
(1)
)
(1)
(1)
W = Writable bit
‘1’ = Bit is set
Bit:
T
A
Bit:
Bit:
vs. T
A
(T
2
register at t
R-0
R-0
1
A
°C
)
LOWER
that contains
A
) Bits: (Note 2)
CONV
SIGN
2
R-0
R-0
0
°C
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
In addition, the T
and 13) to reflect the Event pin state. This allows the
user to identify the cause of the Event output trigger
(see Section 5.2.3 “Event Output Configuration”);
bit 15 is set to ‘1’ if T
bit 14 is set to ‘1’ if T
is set to ‘1’ if T
The T
conditions are described in
2
2
R-0
R-0
-1
7
°C
°C
A
A
) → ADDRESS
register bit assignment and boundary
A
is less than T
2
2
A
R-0
R-0
-2
6
register uses three bits (bits 15, 14
°C
°C
A
A
is greater than T
is greater than or equal to T
© 2009 Microchip Technology Inc.
‘0000 0101’b
Register
x = Bit is unknown
LOWER
2
2
R-0
R-0
-3
5
°C
°C
.
5-5.
UPPER
(Register
(NOTE 1)
and bit 13
2
2
R-0
R-0
-4
4
°C
°C
5-9).
bit 8
bit 0
CRIT
,