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AD9284 数据表(PDF) 7 Page - Analog Devices

部件名 AD9284
功能描述  8-Bit, 250 MSPS, 1.8 V Dual Analog-to-Digital Converter (ADC)
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD9284 数据表(HTML) 7 Page - Analog Devices

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AD9284
Data Sheet
Rev. A | Page 6 of 24
SWITCHING SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, maximum sample rate, −1.0 dBFS differential input, 1.0 V internal reference, unless otherwise noted.
Table 4.
Parameter
Temperature
Min
Typ
Max
Unit
CLOCK INPUT PARAMETERS
Input Clock Rate
Full
30
250
MHz
CLK Period (tCLK)
Full
4
ns
CLK Pulse Width High (tCH)
Full
2
ns
DATA OUTPUT PARAMETERS
Data Propagation Delay (tPD)
3.7
ns
DCO Propagation Delay (tDCO)
Full
3.7
ns
DCO to Data Skew (tSKEW)
Full
−280
−60
+100
ps
Pipeline Delay (Latency)
Full
10.5
Cycles
Aperture Delay (tA)
Full
1.0
ns
Aperture Uncertainty (Jitter, tJ)
Full
0.1
ps rms
Wake-Up Time1
Full
500
μs
OUT-OF-RANGE RECOVERY TIME
Full
2
Cycles
1 Wake-up time is dependent on the value of the decoupling capacitors.
SPI TIMING SPECIFICATIONS
Table 5.
Parameter
Description
Min
Typ
Max
Unit
SPI TIMING REQUIREMENTS
tDS
Setup time between the data and the rising edge of SCLK
2
ns
tDH
Hold time between the data and the rising edge of SCLK
2
ns
tCLK
Period of the SCLK
40
ns
tS
Setup time between CSB and SCLK
2
ns
tH
Hold time between CSB and SCLK
2
ns
tHIGH
SCLK pulse width high
10
ns
tLOW
SCLK pulse width low
10
ns
tEN_SDIO
Time required for the SDIO pin to switch from an input
to an output relative to the SCLK falling edge
10
ns
tDIS_SDIO
Time required for the SDIO pin to switch from an output
to an input relative to the SCLK rising edge
10
ns
Timing Diagram
M – 1
M + 1
M + 2
M + 5
M + 4
M + 3
M
N – 1
N + 1
N – 11 M – 10 N – 10
M – 9
N – 9
M – 8
N – 8
M – 7
N – 7
N + 2
N + 5
N + 4
N + 3
N
tA
tCH
tCLK
tDCO
tSKEW
tPD
VIN±A
VIN±B
CLK+
CLK–
DCO+, DCO–
CH A, CH B
DATA CH A, CH B
Figure 2. Output Data Timing


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