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AD7621 Datasheet(PDF) 27 Page - Analog Devices

Part # AD7621
Description  16-Bit, 250 kSPS, Unipolar/Bipolar Programmable Input PulSAR ADC
PDF  32 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7621 Datasheet(HTML) 27 Page - Analog Devices

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AD7610
Rev. 0 | Page 27 of 32
External Clock Data Read After/During Conversion
It is also possible to begin to read data after conversion and
continue to read the last bits after a new conversion has been
initiated. This method allows the full throughput and the use of
a slower SDCLK frequency. Again, it is recommended to use a
discontinuous SDCLK whenever possible to minimize potential
incorrect bit decisions. For the different modes, the use of a slower
SDCLK such as 20 MHz in warp mode, 15 MHz in normal mode
and 13 MHz in impulse mode can be used.
SDIN
SDOUT
D0
1
2
3
15
16
BUSY
EXT/INT = 1 INVSCLK = 0
CS
SDCLK
4
D2
D1
17
18
SER/PAR = 1
RD = 0
14
D15
D14
D13
X15
X14
19
X0
X2
X1
X15
X14
X13
Y15
Y14
t31
t31
X*
t32
t16
t33
t34
t37
t35
t36
*A DISCONTINUOUS SDCLK IS RECOMMENDED.
Figure 42. Slave Serial Data Timing for Reading (Read After Convert)
SDOUT
D0
12
3
BUSY
EXT/INT = 1
INVSCLK = 0
CS
SDCLK
15
D1
SER/PAR = 1
RD = 0
16
D15
D14
DATA = SDIN
t31
t31
t32
t16
t37
t35
t36
CNVST
X*
X*
X*
X*
X*
X*
t27
*A DISCONTINUOUS SDCLK IS RECOMMENDED.
Figure 43. Slave Serial Data Timing for Reading (Read Previous Conversion During Convert)



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