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AD7171 데이터시트(PDF) 6 Page - Analog Devices

부품명 AD7171
상세설명  16-Bit, Low Power, Sigma-Delta ADC
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AD7171 데이터시트(HTML) 6 Page - Analog Devices

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Data Sheet
AD7171
Rev. C | Page 5 of 16
TIMING CHARACTERISTICS
VDD = 2.7 V to 5.25 V, GND = 0 V, Input Logic 0 = 0 V, Input Logic 1 = VDD, unless otherwise noted.
Table 3.
Parameter1, 2
Limit at TMIN, TMAX
Unit
Test Conditions/Comments
READ
t1
100
ns min
SCLK high pulse width
t2
100
ns min
SCLK low pulse width
t33
0
ns min
SCLK active edge to data valid delay4
60
ns max
VDD = 4.75 V to 5.25 V
80
ns max
VDD = 2.7 V to 3.6 V
t4
10
ns min
SCLK inactive edge to DOUT/RDY high
RESET
t5
100
ns min
PDRST low pulse width
t6
25
ms typ
PDRST high to data valid delay
1
Sample tested during initial release to ensure compliance. All input signals are specified with tR = tF = 5 ns (10% to 90% of VDD) and timed from a voltage level of 1.6 V.
2
See Figure 3.
3
These numbers are measured with the load circuit shown in Figure 2 and defined as the time required for the output to cross the VOL or VOH limits.
4
SCLK active edge is the falling edge of SCLK.
Timing Diagrams
ISINK (1.6mA WITH VDD = 5V,
100µA WITH VDD = 3V)
ISOURCE (200µA WITH VDD = 5V,
100µA WITH VDD = 3V)
1.6V
TO
OUTPUT
PIN
50pF
Figure 2. Load Circuit for Timing Characterization
t3
t1
t2
t4
DOUT/RDY (O)
SCLK (I)
I = INPUT, O = OUTPUT
MSB
LSB
Figure 3. Read Cycle Timing Diagram
t5
t6
PDRST (I)
DOUT/RDY (O)
I = INPUT, O = OUTPUT
Figure 4. Resetting the AD7171


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