STTS424E02BDN3F STMicroelectronics, STTS424E02BDN3F Datasheet - Page 24

• Manufacturer Part Number: STTS424E02BDN3F
• Description: IC TEMP SENSOR 2KB EEPRM 8-TDFN
• Manufacturer: STMicroelectronics

Specifications of STTS424E02BDN3F

• Function: Temp Monitoring System (Sensor)
• Topology: ADC (Sigma Delta), Register Bank
• Sensor Type: Internal
• Sensing Temperature: -40°C ~ 125°C
• Output Type: I²C™/SMBus™
• Output Alarm: Yes
• Output Fan: No
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-TDFN
• Temperature Threshold: + 150 C
• Full Temp Accuracy: +/- 1 C
• Digital Output - Bus Interface: 2-Wire, I2C
• Digital Output - Number Of Bits: 10 bit
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Supply Current: 100 uA
• For Use With: 497-8843 - EVAL DAUGHTER STTS424E02 8-TDFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8284-2

Temperature sensor registers
4.3
4.3.1
Table 12.
1. See
Table 13.
24/50
Above critical
Bit
13
14
15
input
Bit
15
Table 13
Below (temperature) alarm window
– 0 = Temperature is equal to or above the alarm window lower boundary temperature.
– 1 = Temperature is below the alarm window.
Above (temperature) alarm window.
– 0 = Temperature is equal to or below the alarm window upper boundary temperature.
– 1 = Temperature is above the alarm window.
Above critical trip
– 0 = Temperature is below the critical temperature setting.
– 1 = Temperature is equal to or above the critical temperature setting.
(1)
Temperature register (read-only)
This 16-bit, read-only register stores the temperature measured by the internal band gap TS
as shown in
requirement. When reading this register, the MSBs (bit 15 to bit 8) are read first, and then
the LSBs (bit 7 to bit 0) are read. The result is the current-sensed temperature. The data
format is 2s complement with one LSB = 0.25 °C. The MSB has a 128 °C resolution.
The trip status bits represent the internal temperature trip detection, and are not affected by
the status of the event or configuration bits (e.g. event output control or clear event). If
neither of the above or below values are set (i.e. both are 0), then the temperature is exactly
within the user-defined alarm window boundaries.
Temperature format
The 16-bit value used in the trip point set and temperature read-back registers is 2s
complement, with the LSB equal to 0.0625 °C (see
1.
2.
3.
All unused resolution bits are set to zero. The MSB will have a resolution of 128 °C. The
STTS424E02 supports the 0.25 °C/LSB only.
The upper 3 bits indicate trip status based on the current temperature, and are not affected
by the event output status.
Temperature register format
Temperature register bit definitions
for explanation.
Above alarm
window
a value of 019Ch represents 25.75 °C,
a value of 07C0h represents 124 °C, and
a value of 1E74h represents –24.75 °C
Bit
14
(1)
Table
Below alarm
window
12. The STTS424E02 meets the JEDEC mandatory 0.25 °C resolution
Bit
13
(1)
Definition with hysteresis = 0
Sign
MSB
Doc ID 13448 Rev 8
Bit
12
Bit
11
Bit
10
Bit
9
Temperature
Bit
8
Table
Bit
7
13). For example:
Bit
6
Bit
5
Bit
4
Bit
3
LSB
Bit
2
STTS424E02
Bit
1
0
Bit
0
0