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| 型号： | LTC2378IMS-16#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | ADC |
| 英文描述： | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| 封装： | LEAD FREE, PLASTIC, MSOP-16 |
| 文件页数： | 9/24页 |
| 文件大小： | 755K |
| 代理商： | LTC2378IMS-16#TRPBF |
LTC2378-16
17
237816f
TiMing DiagraMs
Normal Mode, Multiple Devices
Figure 14 shows multiple LTC2378-16 devices operating
in normal mode (CHAIN = 0) sharing CNV, SCK and SDO.
By sharing CNV, SCK and SDO, the number of required
signals to operate multiple ADCs in parallel is reduced.
Since SDO is shared, the RDL/SDI input of each ADC must
be used to allow only one LTC2378-16 to drive SDO at a
time in order to avoid bus conflicts. As shown in Figure 14,
the RDL/SDI inputs idle high and are individually brought
low to read data out of each device between conversions.
When RDL/SDI is brought low, the MSB of the selected
device is output onto SDO.
237816 F14a
RDLB
RDLA
CONVERT
IRQ
DATA IN
DIGITAL HOST
CLK
CNV
LTC2378-16
SDO
A
SCK
RDL/SDI
CNV
LTC2378-16
SDO
B
SCK
RDL/SDI
CHAIN
BUSY
CHAIN
237816 F14
D15A
SDO
SCK
CNV
BUSY
CHAIN = 0
RDL/SDIB
RDL/SDIA
D15B D14B
D1B
D0B
D13B
D14A
D13A
D1A
D0A
Hi-Z
tEN
tHSDO
tDSDO
tDIS
tSCKL
tSCKH
tCNVL
1
2
3
14
15
16
17
18
19
30
31
32
tSCK
CONVERT
tQUIET
tCONV
tBUSYLH
POWER-DOWN AND ACQUIRE
POWER-DOWN
AND ACQUIRE
Figure 14. Normal Mode With Multiple Devices Sharing CNV, SCK and SDO
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