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參數資料
| 型號： | AD7746 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 24BIT(s), 2Cel, RECTANGULAR, SURFACE MOUNT |
| 封裝： | MO-153AB, TSSOP-16 |
| 文件頁數： | 13/17頁 |
| 文件大?。?/td> | 232K |
| 代理商： | AD7746 |
Preliminary Technical Data
AD7745/AD7746
Rev. PrF | Page 5 of 17
TIMING SPECIFICATIONS
Table 2. (VDD = 2.7 V to 3.3 V, or 4.75V to 5.25V, GND = 0 V; Input Logic 0 = 0 V; Input Logic 1 = VDD; –40°C to +125°C, unless oth-
erwise noted.)
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
SERIAL INTERFACE1, 2
See Figure 3
SCL Frequency
0
400
kHz
SCL High Pulse Width, tHIGH
0.6
s
SCL Low Pulse Width, tLOW
1.3
s
SCL, SDA Rise Time, tR
0.3
s
SCL, SDA Fall Time, tF
0.3
s
Hold Time (Start Condition), tHD;STA
0.6
s
After this period, the first clock is generated
Setup Time (Start Condition), tSU;STA
0.6
s
Relevant for repeated start condition
Data Setup Time, tSU;DAT
0.1
s
Setup Time (Stop Condition), tSU;STO
0.6
s
Data Hold Time, tHD;DAT (Master)
0
s
Bus Free Time (Between Stop and Start Condition, tBUF
1.3
s
1 Sample tested during initial release to ensure compliance.
2 All input signals are specified with input rise/fall times = 3 ns, measured between the 10% and 90% points. Timing reference points at 50% for inputs and outputs.
Output load = 10 pF.
P
S
tLOW
tR
tF
tHD:STA
tHD:DAT
tSU:DAT
tSU:STA
tHD:STA
tSU:STO
tHIGH
SCL
PS
SDA
tBUF
04918-
0-
002
Figure 3.Serial Interface Timing Diagram
ABSOLUTE MAXIMUM RATINGS
Table 3. (TA = 25°C, unless otherwise noted.)
Parameter
Rating
Positive Supply Voltage VDD to GND
0.3 V to +6.5 V
Voltage on any input or output pin to GND
–0.3 V to VDD + 0.3 V
ESD Rating (ESD Association Human Body Model, S5.1)
TBD V
Operating Temperature Range
–40°C to +125°C
Storage Temperature Range
–65°C to +150°C
Junction Temperature
150°C
TSSOP Package
θ
JA
Thermal Impedance to Air
128 °C/W
TSSOP Package
θ
JC
Thermal Impedance to Case
14 °C/W
Lead Temperature, Soldering
Vapor Phase (60 sec)
215°C
Infrared (15 sec)
220°C
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only;
functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is
not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
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