參數(shù)資料
型號(hào): LTC2377IDE-18#PBF
廠商: Linear Technology
文件頁數(shù): 9/24頁
文件大?。?/td> 0K
描述: IC ADC 18BIT 500KSPS 16-DFN
產(chǎn)品培訓(xùn)模塊: LTC2379- 18-/16-bit Fully-Differential SAR ADC Family Overview
標(biāo)準(zhǔn)包裝: 91
位數(shù): 18
采樣率(每秒): 500k
數(shù)據(jù)接口: 串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 8mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°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(gè)差分,雙極
配用: DC1783A-G-ND - BOARD SAR ADC LTC2377-18
DC1783A-C-ND - BOARD SAR ADC LTC2377-16
LTC2377-18
17
237718f
TIMING DIAGRAMS
Normal Mode, Multiple Devices
Figure 14 shows multiple LTC2377-18 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 LTC2377-18 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.
237718 F14a
RDLB
RDLA
CONVERT
IRQ
DATA IN
DIGITAL HOST
CLK
CNV
LTC2377-18
SDO
A
SCK
RDL/SDI
CNV
LTC2377-18
SDO
B
SCK
RDL/SDI
CHAIN
BUSY
CHAIN
237718 F14
D17A
SDO
SCK
CNV
BUSY
CHAIN = 0
RDL/SDIB
RDL/SDIA
D17B
D16B
D1B
D0B
D15B
D16A
D15A
D1A
D0A
Hi-Z
tEN
tHSDO
tDSDO
tDIS
tSCKL
tSCKH
tCNVL
12
3
16
17
18
19
20
21
34
35
36
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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