AD6643
SWITCHING SPECIFICATIONS
Table 4.
Parameter
Symbol
Temperature Min
Typ
Max
Unit
CLOCK INPUT PARAMETERS
Input Clock Rate
Full
Full
Full
62ꢀ
200
MHz
MSPS
ns
Conversion Rate1
40
4.0
CLK Period—Divide-by-1 Mode2
CLK Pulse Width High2
tCLK
tCH
Divide-by-1 Mode, DCS Enabled
Divide-by-1 Mode, DCS Disabled
Divide-by-2 Through Divide-by-8 Modes, DCS Enabled
DATA OUTPUT PARAMETERS (DATA, OR)
LVDS Mode
Full
Full
Full
2.2ꢀ
2.37ꢀ 2.ꢀ
0.8
2.ꢀ
2.7ꢀ
2.62ꢀ ns
ns
ns
Data Propagation Delay2
DCO Propagation Delay2
DCO to Data Skew2
tPD
tDCO
tSKEW
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
4.8
ꢀ.ꢀ
ns
ns
ns
Cycles3
Cycles3
ns
ps rms
ꢁs
0.1
0.7
10
13
1.0
0.1
10
2ꢀ0
3
1.3
Pipeline Delay (Latency)
NSR Enabled
Aperture Delay4
Aperture Uncertainty (Jitter)4
Wake-Up Time (from Standby)
Wake-Up Time (from Power-Down)
OUT-OF-RANGE RECOVERY TIME
tA
tJ
ꢁs
Cycles
1 Conversion rate is the clock rate after the divider.
2 See Figure 2 for timing diagram.
3 Cycles refers to ADC input sample rate cycles.
4 Not shown in timing diagrams.
TIMING SPECIFICATIONS
Table 5.
Parameter
Conditions
Min Typ Max Unit
SYNC TIMING REQUIREMENTS
See Figure 3 for timing details
tSSYNC
tHSYNC
SYNC to the rising edge of CLK setup time
SYNC to the rising edge of CLK hold time
See Figure 4ꢀ for SPI timing diagram
0.3
0.4
ns
ns
SPI TIMING REQUIREMENTS
tDS
tDH
tCLK
tS
tH
tHIGH
tLOW
tEN_SDIO
Setup time between the data and the rising edge of SCLK
Hold time between the data and the rising edge of SCLK
Period of the SCLK
Setup time between CSB and SCLK
Hold time between CSB and SCLK
Minimum period that SCLK should be in a logic high state
Minimum period that SCLK should be in a logic low state
Time required for the SDIO pin to switch from an input to an output
relative to the SCLK falling edge (not shown in Figure 4ꢀ)
2
2
40
2
2
10
10
10
ns
ns
ns
ns
ns
ns
ns
ns
tDIS_SDIO
Time required for the SDIO pin to switch from an output to an input
relative to the SCLK rising edge (not shown in Figure 4ꢀ)
10
ns
Rev. 0 | Page 8 of 36