CAT34TS02VP2GT4B ON Semiconductor, CAT34TS02VP2GT4B Datasheet - Page 18

• Manufacturer Part Number: CAT34TS02VP2GT4B
• Description: IC TEMP SENSOR 2KB MEM 8-TDFN
• Manufacturer: ON Semiconductor

Specifications of CAT34TS02VP2GT4B

• Function: Temp Monitoring System (Sensor)
• Topology: ADC (Sigma Delta), Comparator, Register Bank
• Sensor Type: Internal
• Sensing Temperature: -40°C ~ 125°C
• Output Type: I²C™, SPI™
• Output Alarm: Yes
• Output Fan: No
• Voltage - Supply: 2.97 V ~ 3.63 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-WFDFN Exposed Pad
• Digital Output - Bus Interface: I2C, SMBus
• Digital Output - Number Of Bits: 12 bit
• Supply Voltage (min): 3.3 V
• Description/function: Digital Output Temperature Sensor with On-board SPD EEPROM
• Maximum Operating Temperature: + 130 C
• Minimum Operating Temperature: - 45 C
• Supply Current: 500 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

CAT34TS02
REGISTER DATA FORMAT
The values used in the temperature data register and
the 3 temperature trip point registers are expressed in
two’s complement format. The measured temperature
value is expressed with 12-bit resolution, while the 3
trip temperature limits are set with 10-bit resolution. The
total temperature range is arbitrarily defined as 256°C,
thus yielding an LSB of 0.0625°C for the measured
temperature and 0.25°C for the 3 limit values. Bit B12 in
all temperature registers represents the sign, with a ‘0’
indicating a positive, and a ‘1’ a negative value. In two’s
complement format, negative values are obtained by
complementing their positive counterpart and adding a
‘1’, so that the sum of opposite signed numbers, but of
equal absolute value, adds up to zero.
Note that trailing ‘0’ bits, are ‘0’ irrespective of polarity.
Therefore the don’t care bits (B1 and B0) in the 10-bit
resolution temperature limit registers, are always ‘0’.
12-Bit Temperature Data Format
Doc. No. MD-1129 Rev. H
Binary (B12 to B0)
1 1100 1001 0000
1 1100 1110 0000
1 1110 0111 0000
1 1111 1111 1111
0 0000 0000 0000
0 0000 0000 0001
0 0001 1001 0000
0 0011 0010 0000
0 0111 1101 0000
1CE0
1C90
1FFF
1E70
Hex
7D0
000
001
190
320
Temperature
−0.0625°C
+0.0625°C
+125°C
−55°C
−50°C
−25°C
+25°C
+50°C
0°C
18
EVENT PIN FUNCTIONALITY
The EVENT
illustrated in Figure 14, and according to the operating
mode defined by the Configuration register.
In Interrupt Mode, the enabled EVENT
asserted every time the temperature crosses one of
the alarm window limits, and can be de-asserted by
writing a ‘1’ to the clear event bit (B5) in the
configuration register. When the temperature exceeds
the critical limit, the event remains asserted as long as
the temperature stays above the critical limit and can
not be cleared.
In Comparator Mode, the EVENT
outside the alarm window limits, while in Critical
Temperature Mode, EVENT
the critical limit. The exact trip limits are determined by
the 3 temperature limit settings and the hystersis
offsets, as illustrated in Figure 15.
Following a TS shut-down request, the converter is
stopped and the most recently recorded temperature
value present in the TDR is frozen; the EVENT
will continue to reflect the state immediatelly
preceding the shut-down command. Therefore, if the
state of the EVENT
condition, appropriate action must be taken either
before or after shutting down the TS. This may require
clearing the event, disabling the EVENT
perhaps changing the EVENT
In normal use, events are triggered by a change in
recorded temperature, but the CAT34TS02 will also
respond to limit register changes. Whereas recorded
temperature values are updated at sampling rate
frequency, limits can be modified at any time. The
enabled EVENT
soon as the respective registers are updated.This
feature may be useful during testing.
¯¯¯¯¯¯ output reacts to temperature changes as
¯¯¯¯¯¯ output will react to limit changes as
¯¯¯¯¯¯ output creates an undesirable bus
¯¯¯¯¯¯ is asserted only above
¯¯¯¯¯¯ output polarity.
Characteristics subject to change without notice
¯¯¯¯¯¯ output is asserted
¯¯¯¯¯¯ output will be
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¯¯¯¯¯¯ output or
¯¯¯¯¯¯ output