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LTC1992 датащи(PDF) 17 Page - Linear Technology

номер детали LTC1992
подробное описание детали  18-Bit, 1.6Msps, Pseudo-Differential Unipolar SAR
PDF  24 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LTC1992 датащи(HTML) 17 Page - Linear Technology

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LTC2369-18
17
236918fa
TIMING DIAGRAMS
Chain Mode, Multiple Devices
When CHAIN = OVDD, the LTC2369-18 operates in
chain mode. In chain mode, SDO is always enabled and
RDL/SDI serves as the serial data input pin (SDI) where
daisy-chain data output from another ADC can be input.
This is useful for applications where hardware constraints
may limit the number of lines needed to interface to a large
number of converters. Figure 12 shows an example with
two daisy-chained devices. The MSB of converter A will
appear at SDO of converter B after 18 SCK cycles. The
MSB of converter A is clocked in at the SDI/RDL pin of
converter B on the rising edge of the first SCK.
236918 F12
D0A
D1A
D16A
D17A
D15B
D16B
D17B
SDOB
SDOA = RDL/SDIB
RDL/SDIA = 0
D0B
D1B
D15A
D16A
D17A
D0A
D1A
1
2
3
16
17
181920
3435
36
tDSDOBUSYL
tSSDISCK
tHSDISCK
tBUSYLH
tCONV
tHSDO
tDSDO
tSCKL
tSCKH
tSCKCH
tCNVL
tCYC
CONVERT
CONVERT
SCK
CNV
BUSY
CHAIN = OVDD
tQUIET
POWER-DOWN AND ACQUIRE
POWER-DOWN
AND ACQUIRE
OVDD
CONVERT
IRQ
DATA IN
DIGITAL HOST
CLK
CNV
LTC2369-18
BUSY
SDO
B
SCK
RDL/SDI
CNV
LTC2369-18
SDO
A
SCK
RDL/SDI
CHAIN
OVDD
CHAIN
Figure 12. Chain Mode Timing Diagram



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