TCN75AVUA Microchip Technology, TCN75AVUA Datasheet - Page 25

• Manufacturer Part Number: TCN75AVUA
• Description: IC TEMP SENSOR SRL 2.7V 8SMOP
• Manufacturer: Microchip Technology

Specifications of TCN75AVUA

• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• 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: Voltage
• Sensing Accuracy Range: ± 1°C
• Temperature Sensing Range: -40°C To +125°C
• Supply Voltage Range: 2.7V To 5.5V
• Resolution (bits): 12bit
• Rohs Compliant: Yes
• Sensor Case Style: MSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

FIGURE 5-7:
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 the CONFIG register can
be used to select up to six fault queue cycles. For
example, if six fault queues are selected, T
greater than T
before ALERT is asserted as a comparator or an inter-
rupt 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 TCN75A 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
must remain above T
Bits
consecutive
10
11
12
9
shows the T
Fault Queue
 ADC Resolution
SET
Resolution
RESOLUTION AND
CONVERSION TIME
conversions
0.0625
for six consecutive conversions
0.125
0.25
A
0.5
Alert Output.
A
register conversion time for the
must remain below T
Figure 2-3
SET
for the consecutive
before
t
shows accuracy
CONV
HYST
120 ms
240 ms
30 ms
60 ms
.
ALERT
(typical)
A
I
f six fault
must be
HYST
for
is
5.4
The TCN75A has an internal Power-on Reset (POR)
circuit. If the power supply voltage V
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 TCN75A 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
T
T
T
Pointer
CONFIG
A
SET
HYST
Register
Summary of Power-up Condition
shows the power-up default summary.
A
register with valid temperature data.
POWER-UP DEFAULTS
(Hex)
0000
A000
9600
Data
00
00
Continuous Conversion
Temperature register
Power-up Defaults
Comparator mode
Active-low Output
CONV
TCN75A
9-bit Resolution
Fault Queue 1
DS21935D-page 25
DD
for the TCN75A
80°C
75°C
0°C
glitches down