Datasheet

www.ti.com
BUSY
BUSY
BUSY
CONVST_QUAL
t
quiet1
t
quiet2
t
quiet3
Quiet Zones
t
su2
t
h2
CS
No Read Zone (CS Initiated)
t
su3
t
h8
CS
FS
No Read Zone (FS Initiated)
CONVERSION AND SAMPLING
CS
CONVST
CONVST_QUAL
(Device Internal)
DEVICE STATE
BUSY
t
w2
t
su2
t
h1
t
d4
t
quiet2
t
su1
t
su4
t
d1
t
quiet1
t
quiet2
t
quiet1
t
d2
SAMPLE CONVERT SAMPLE
t
CONV
t
acq1
t
quiet3
ADS8380
SLAS387A – NOVEMBER 2004 – REVISED DECEMBER 2004
Figure 40. Quiet Zones and No-Read Zones
1. Convert start command:
The device enters the conversion phase from the sampling phase when a falling edge is detected on
CONVST_QUAL. This is shown in Figure 41 , Figure 42 , and Figure 43 .
2. Sample (acquisition) start command:
The device starts sampling from the wait state or at the end of a conversion if CONVST_QUAL is detected
as high and CS as low. This is shown in Figure 41 , Figure 42 , and Figure 43 .
Maintaining this condition when the device has just finished a conversion (as shown in Figure 41 ) takes the
device immediately into the sampling phase after the conversion phase (back-to-back conversion) and
hence achieves maximum throughput. Otherwise, the device enters the wait state.
Figure 41. Back-To-Back Conversion and Sample
16
Submit Documentation Feedback