参数资料
型号: DC1783A-G
厂商: Linear Technology
文件页数: 9/24页
文件大小: 0K
描述: BOARD SAR ADC LTC2377-18
软件下载: QuikEval II System
设计资源: DC1783A Design Files
DC1783A Schematic
标准包装: 1
系列: QuikEval™
ADC 的数量: 1
位数: 18
采样率(每秒): 500k
数据接口: 串行,SPI?
输入范围: ±VREF
在以下条件下的电源(标准): 6.8mW @ 500kSPS
工作温度: 0°C ~ 70°C
已用 IC / 零件: LTC2377-18
已供物品:
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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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