OVDD 237818 F15a CONVERT IRQ DATA IN DIGITAL HOST CLK CNV LTC2378" />
參數(shù)資料
型號: DC1783A-F
廠商: Linear Technology
文件頁數(shù): 10/24頁
文件大?。?/td> 0K
描述: BOARD SAR ADC LTC2378-18
軟件下載: QuikEval II System
設(shè)計(jì)資源: DC1783A Design Files
DC1783A Schematic
標(biāo)準(zhǔn)包裝: 1
系列: QuikEval™
ADC 的數(shù)量: 1
位數(shù): 18
采樣率(每秒): 1M
數(shù)據(jù)接口: 串行,SPI?
輸入范圍: ±VREF
在以下條件下的電源(標(biāo)準(zhǔn)): 13.5mW @ 1MSPS
工作溫度: 0°C ~ 70°C
已用 IC / 零件: LTC2378-18
已供物品:
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LTC2378-18
18
237818f
TIMING DIAGRAMS
OVDD
237818 F15a
CONVERT
IRQ
DATA IN
DIGITAL HOST
CLK
CNV
LTC2378-18
BUSY
SDO
B
SCK
RDL/SDI
CNV
LTC2378-18
SDO
A
SCK
RDL/SDI
CHAIN
OVDD
CHAIN
Chain Mode, Multiple Devices
When CHAIN = OVDD, the LTC2378-18 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 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.
237818 F15
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
SCK
CNV
BUSY
CHAIN = OVDD
tQUIET
POWER-DOWN AND ACQUIRE
POWER-DOWN
AND ACQUIRE
Figure 15. Chain Mode Timing Diagram
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