MCP9800A0T-M/OT Microchip Technology, MCP9800A0T-M/OT Datasheet - Page 25

IC SENSOR THERMAL 2.7V SOT235

MCP9800A0T-M/OT

Manufacturer Part Number
MCP9800A0T-M/OT
Description
IC SENSOR THERMAL 2.7V SOT235
Manufacturer
Microchip Technology

Specifications of MCP9800A0T-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
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
High Accuracy 12-bit Serial Input/Output, Thermal Monitors
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 55 C
Supply Current
400 uA
Ic Output Type
Voltage
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
For Use With
MCP9800DM-TS1 - DEMO BOARD TEMP SENSOR MCP9800
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
MCP9800A0T-M/OTTR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MCP9800A0T-M/OT
Manufacturer:
MICROCHIP
Quantity:
12 000
Part Number:
MCP9800A0T-M/OT
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
5.3.4.6
The fault queue feature can be used as a filter to lessen
the probability of spurious activation of the ALERT pin.
T
number of conversion cycles selected using the Fault
Queue bits. Bit 3 and bit 4 of CONFIG can be used to
select up to six fault queue cycles. For example, if six
fault queues are selected, T
T
asserted as a comparator or an interrupt output.
This queue setting also applies for T
queues are selected, T
six
deasserted (Comparator mode) or before another
interrupt is asserted (Interrupt mode).
5.3.4.7
The MCP9800/1/2/3 provides access to select the ADC
resolution from 9-bit to 12-bit (0.5°C to 0.0625°C
resolution) using bit 6 and bit 5 of the CONFIG register.
The user can gain better insight into the trends and
characteristics of the ambient temperature by using a
finer resolution. Increasing the resolution also reduces
the quantization error.
versus resolution.
Table 5-3
corresponding resolution.
TABLE 5-3:
 2010 Microchip Technology Inc.
A
SET
must remain above T
Bits
consecutive
for six consecutive conversions before ALERT is
10
11
12
9
shows the T
Fault Queue
 ADC Resolution
Resolution
RESOLUTION AND
CONVERSION TIME
conversions
0.0625
0.125
0.25
A
0.5
A
register conversion time for the
must remain below T
Figure 2-3
SET
A
must be greater than
for the consecutive
before
t
shows accuracy
CONV
HYST
120 ms
240 ms
30 ms
60 ms
.
ALERT
(typical)
I
f six fault
HYST
for
is
5.4
The MCP9800/1/2/3 has an internal Power-on Reset
(POR) circuit. If the power supply voltage V
down to the 1.7V (typical) threshold, the device resets
the registers to the power-up default settings.
Table 5-4
TABLE 5-4:
At power-up, the MCP9800/1/2/3 has an inherent 2 ms
(typical) power-up delay before updating the registers
with default values and start a conversion cycle. This
delay reduces register corruption due to unsettled
power. After power-up, it takes t
to update the T
Register
CONFIG
Pointer
T
T
HYST
T
SET
Summary of Power-up Condition
A
shows the power-up default summary.
A
MCP9800/1/2/3
register with valid temperature data.
POWER-UP DEFAULTS
(Hex)
0000
A000
9600
Data
00
00
Continuous Conversion
Comparator mode
Active-low Output
Fault Queue 1
9-bit Resolution
Temperature register
Power-up Defaults
CONV
DS21909D-page 25
for the TCN75A
80°C
75°C
0°C
DD
glitches

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