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AD7747 Arkusz danych(PDF) 5 Page - Analog Devices

Numer części AD7747
Szczegółowy opis  24-Bit Capacitance-to-Digital Converter with Temperature Sensor
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Strona internetowa  http://www.analog.com
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AD7747 Arkusz danych(HTML) 5 Page - Analog Devices

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Preliminary Technical Data
AD7747
Rev. PrC| Page 5 of 20
TIMING SPECIFICATIONS
VDD = 2.7 V to 3.6 V, or 4.75 V to 5.25 V; GND = 0 V; Input Logic 0 = 0 V; Input Logic 1 = VDD; –40°C to +125°C, unless otherwise noted.
Table 2.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
SERIAL INTERFACE1, 2
See Figure 2
SCL Frequency
0
400
kHz
SCL High Pulse Width, tHIGH
0.6
µs
SCL Low Pulse Width, tLOW
1.3
µs
SCL, SDA Rise Time, tR
0.3
µs
SCL, SDA Fall Time, tF
0.3
µs
Hold Time (Start Condition), tHD;STA
0.6
µs
After this period, the first clock is generated
Set-Up Time (Start Condition), tSU;STA
0.6
µs
Relevant for repeated start condition
Data Set-Up Time, tSU;DAT
0.1
µs
Set-Up Time (Stop Condition), tSU;STO
0.6
µs
Data Hold Time, tHD;DAT (Master)
0
µs
Bus-Free Time (Between Stop and Start Condition, tBUF)
1.3
µs
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
Figure 2. Serial Interface Timing Diagram


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