LTC2379CDE-18 LINEAR [Linear Integrated Systems], LTC2379CDE-18 Datasheet - Page 18

• Manufacturer Part Number: LTC2379CDE-18
• Description: LTC2379-1818-Bit, 1.6Msps, Low Power SAR ADC with 101.2dB SNR
• Manufacturer: LINEAR [Linear Integrated Systems]

TIMING DIAGRAMS
LTC2379-18
Chain Mode, Multiple Devices
When CHAIN = OV
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.
POWER-DOWN
18
AND ACQUIRE
CHAIN = OV
RDL/SDI
SDO
t
BUSY
SDO
BUSYLH
CNV
SCK
A
B
= RDL/SDI
A
= 0
DD
B
t
DSDOBUSYL
CONVERT
t
CONV
DD
OV
, the LTC2379-18 operates in chain
DD
CHAIN
RDL/SDI
LTC2379-18
D17
D17
CNV
SCK
A
A
B
1
D16
D16
SDO
A
B
Figure 15. Chain Mode Timing Diagram
2
D15
D15
t
t
HSDISCK
SSDISCK
A
B
OV
3
DD
RDL/SDI
CHAIN
16
POWER-DOWN AND ACQUIRE
t
CYC
LTC2379-18
D1
D1
This is useful for applications where hardware constraints
may limit the number of lines needed to interface to a large
number of converters. Figure 15 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.
CNV
SCK
A
B
B
17
t
SCKCH
D0
D0
BUSY
A
B
SDO
t
HSDO
18
t
DSDO
D17
t
SCKH
A
19
D16
A
CONVERT
IRQ
DATA IN
CLK
20
DIGITAL HOST
t
SCKL
34
237918 F15a
D1
A
35
D0
A
36
t
CNVL
237918 F15
CONVERT
237918fa
t
QUIET