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LT6237 Datasheet(PDF) 39 Page - Linear Technology

Part # LT6237
Description  18-Bit, 1Msps, 8-Channel SAR ADC with 100dB SNR
PDF  50 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT6237 Datasheet(HTML) 39 Page - Linear Technology

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LTC2373-18
39
237318f
For more information www.linear.com/LTC2373-18
TiMing DiagraMs
Multiple Devices
Figure 27 shows the multiple LTC2373-18 devices operat-
ing and sharing CNV, SDI, SCK and SDO. By sharing CNV,
SDI, SCK and SDO, the number of signals required to
operate multiple ADCs in parallel is reduced. Since SDO is
shared, the RDL input of each ADC must be used to allow
only one LTC2373-18 to drive SDO at a time in order to
avoid bus conflicts. RDL must also be used to selectively
program each ADC through the shared SDI input line. The
RDLinputsidlehighandareindividuallybroughtlowtoread
data out of and selectively program each device between
conversions. When RDL is brought low, the MSB(D17)
of the selected device is output onto SDO.
Figure 27. Multiple Devices Sharing CNV, SCK and SDO
CNV
RESET = 0
NAP
RDLA
RDLB
BUSY
tCNVH
tCONV
CONVERT
NAP
tBUSYLH
1
2
3
SCK
16
17
18
SDO
237318 F27
19
20
21
tCNVL
CONVERT
tHSDISCK
tSSDISCK
tDSDO
tDIS
Hi-Z
tHSDO
tSCK
SDI
DON’T CARE
CA[7] CA[6] CA[5]
34
35
36
tQUIET
tSCKL
tSCKH
tEN
Hi-Z
D17A D16A D15A
D1A D0A
D17B D16B D15B
Hi-Z
D1B
D0B
CB[7]
CB[5]
CB[6]
CONVERT
DIGITAL HOST
IRQ
SDI
DATA IN
CLK
RDLB
RDLA
CNV
BUSY
SDI
SDO
SCK
RDL
RESET
LTC2373-18
A
CNV
BUSY
SDI
SDO
SCK
RDL
RESET
LTC2373-18
B



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