TCN75AVOA Microchip Technology, TCN75AVOA Datasheet - Page 15
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TCN75AVOA
Manufacturer Part Number
TCN75AVOA
Description
IC TEMP SENSOR SRL 2.7V 8SOIC
Manufacturer
Microchip Technology
Datasheets
1.TCN75AVOA.pdf
(40 pages)
2.TCN75AVOA.pdf
(4 pages)
3.TCN75AVUA.pdf
(32 pages)
4.TCN75AVOA.pdf
(30 pages)
Specifications of TCN75AVOA
Package / Case
8-SOIC (3.9mm Width)
Output Type
I²C™
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
2-Wire, I2C
Digital Output - Number Of Bits
9 bit to 12 bit
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.7 V
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 55 C
Supply Current
500 uA
Ic Output Type
Digital
Sensing Accuracy Range
± 2°C
Temperature Sensing Range
-40°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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TCN75AVOA
Manufacturer:
MICROCHIP
Quantity:
12 000
Company:
Part Number:
TCN75AVOA713
Manufacturer:
MELEXIS
Quantity:
5 600
Part Number:
TCN75AVOA713
Manufacturer:
MIC
Quantity:
20 000
4.3.4.6
The fault queue feature can be used as a filter to lessen
the probability of spurious activation of the ALERT pin.
T
ber 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 consecutive conversions before ALERT is deas-
serted (Comparator mode) or before another interrupt
is asserted (Interrupt mode).
4.3.4.7
The TCN75A provides access to select the ADC
resolution from 9-bit to 12-bit 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.
Figure 2-4 shows accuracy versus resolution.
Table 4-1 shows the T
corresponding resolution.
TABLE 4-1:
© 2005 Microchip Technology Inc.
A
SET
must remain above T
Bits
for six consecutive conversions before ALERT is
10
11
12
9
Fault Queue
ADC Resolution
°C/bit (typ.)
Resolution
RESOLUTION AND
CONVERSION TIME
0.0625
0.125
0.25
A
0.5
A
register conversion time for the
must remain below T
SET
for the consecutive num-
A
must be greater than
HYST
t
CONV
120 ms
240 ms
30 ms
60 ms
.
I
f six fault
(typ.)
HYST
for
4.4
The TCN75A has an internal Power-on Reset (POR)
circuit. If the power supply voltage V
to the 1.7V (typ.) threshold, the device resets the
registers to the power-up default settings.
Table 4-2 shows the power-up default summary.
TABLE 4-2:
At power-up, the TCN75A has an inherent 2 ms (typ.)
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
update the T
Register
CONFIG
Pointer
T
T
HYST
T
SET
Summary of Power-up Condition
A
A
register with valid temperature data.
POWER-UP DEFAULTS
(Hex)
A000
Data
0000
9600
00
00
CONV
Continuous Conversion
Temperature register
Power-up Defaults
Comparator mode
Active-low Output
TCN75A
9-bit Resolution
for the TCN75A to
Fault Queue 1
DS21935A-page 15
DD
80°C
75°C
0°C
glitches down