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Preliminary Data Sheet
A.C. Characteristics of Temperature Sensor
V CC = 3.3 V ± 10%, T A = ?40°C to +125°C
Rev.0.9
20.09.2011
Symbol
f SCL
Parameter / Condition
SCL clock frequency
Min
10
Max
400
Unit
kHz
t BUF
t F
t R
Bus Free Time Between STOP and START
SDA fall time
SDA rise time
1300
300
300
ns
ns
ns
t HD:DAT
t H:STA
t HIGH
t LOW
t SU:DAT
t SU:STA
t SU:STO
t TIMEOUT
t I
t WR
t PU
Data hold time (accepted for Input Data)
Data Hold Time (guaranteed for Output Data)
Start condition hold time
High Period of SCL
Low Period of SCL
Data setup time
Start condition setup time
Stop condition setup time
SMBus SCL Clock Low Timeout
Noise Pulse Filtered at SCL and SDA Inputs
Write Cycle Time
Power-up Delay to Valid Temperature Recording
0
300
600
600
1300
100
600
600
25
900
35
100
5
100
ns
ns
ns
ns
ns
ns
ns
ns
ms
ns
ms
ms
Temperature Characteristics of Temperature Sensor
V CC = 3.3 V ± 10%, T A = ?40°C to +125°C
Thermal Resistance θ JA
Parameter
Temperature Reading Error
Class B, JC42.4 compliant
ADC Resolution
Temperature Resolution
Conversion Time
1
Test Conditions/Comments
+75°C ≤ T A ≤ +95°C, active range
+40°C ≤ T A ≤ +125°C, monitor range
- 40°C ≤ T A ≤ +125°C, sensing range
Junction-to-Ambient (Still Air)
Max
±1.0
±2.0
±3.0
12
0.0625
100
92
Unit
°C
°C
°C
Bits
°C
Ms
°C/W
1
Power Dissipation is defined as P J = (T J ? T A )/θ JA , where TJ is the junction temperature and TA is the ambient temperature. The thermal
resistance value refers to the case of a package being used on a standard 2-layer PCB.
Slave Address Bits of Temperature Sensor
Device
Device Type Identifier
Select Address Signals
R/W#
b7
1
b6
b5
b4
b3
b2
b1
b0
EEPROM
Temp. Sensor
1
0
0
0
1
1
0
1
A 2
A 2
A 1
A 1
A 0
A 0
R/W#
R/W#
1
The most significant bit, b7, is sent first.
Swissbit AG
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CH – 9552 Bronschhofen
Fon: +41 (0) 71 913 03 03
Fax: +41 (0) 71 913 03 15
www.swissbit.com
eMail: info@swissbit.com
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