參數(shù)資料
型號: LTC2381CDE-16#PBF
廠商: Linear Technology
文件頁數(shù): 9/24頁
文件大?。?/td> 0K
描述: IC ADC 16BIT 1CH 250KSPS 16-DFN
標(biāo)準(zhǔn)包裝: 91
位數(shù): 16
采樣率(每秒): 250k
數(shù)據(jù)接口: 串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 4.25mW
電壓電源: 模擬和數(shù)字
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 16-WFDFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 16-DFN(4x3)
包裝: 管件
輸入數(shù)目和類型: 1 個差分,雙極
配用: DC1571A-C-ND - BOARD SAR ADC LTC2381-16
LTC2381-16
17
238116f
TIMING DIAGRAM
238116 F11
RDL2
RDL1
CONVERT
IRQ
DATA IN
DIGITAL HOST
CLK
CNV
LTC2381-16
SDO
A
SCK
RDL/SDI
CNV
LTC2381-16
SDO
B
SCK
RDL/SDI
CHAIN
BUSY
CHAIN
238116 F11a
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
tSSCKRDL
tHSCKRDL
12
3
14
15
16
17
18
19
30
31
32
tSCK
POWER-UP
CONVERT
POWER-DOWN
CONVERT
ACQUIRE
tCONV
tHOLD
tBUSYLH
Figure 13. Normal Mode with Multiple Devices Sharing CNV, SCK and SDO
Normal Mode, Multiple Devices
Figure 13 shows multiple LTC2381-16 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 LTC2381-16 to drive SDO at a
time in order to avoid bus conflicts. As shown in Figure 13,
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. To ensure the MSB is properly
output and captured, SCK must be held low at least 1ns
before and 16ns after bringing RDL/SDI low.
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