參數(shù)資料
型號(hào): DC1783A-H
廠商: Linear Technology
文件頁(yè)數(shù): 9/24頁(yè)
文件大小: 0K
描述: BOARD SAR ADC LTC2376-18
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): 250k
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)): 3.4mW @ 250kSPS
工作溫度: 0°C ~ 70°C
已用 IC / 零件: LTC2376-18
已供物品:
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LTC2376-18
17
237618f
TIMING DIAGRAMS
Normal Mode, Multiple Devices
Figure 14 shows multiple LTC2376-18 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 LTC2376-18 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.
237618 F14a
RDLB
RDLA
CONVERT
IRQ
DATA IN
DIGITAL HOST
CLK
CNV
LTC2376-18
SDO
A
SCK
RDL/SDI
CNV
LTC2376-18
SDO
B
SCK
RDL/SDI
CHAIN
BUSY
CHAIN
237618 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
12
3
14
15
16
17
18
19
30
31
32
tSCK
CONVERT
tQUIET
tCONV
tHOLD
tBUSYLH
POWER-DOWN
ACQUIRE
POWER-DOWN
Figure 14. Normal Mode With Multiple Devices Sharing CNV, SCK and SDO
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