參數(shù)資料
型號: LTC1418
廠商: Linear Technology Corporation
英文描述: Low Power, 14-Bit, 200ksps ADC with Serial and Parallel I/O(低功耗,14位, 200ksps,采樣模數(shù)轉(zhuǎn)換器(帶并行和串行I/O口))
中文描述: 低功耗,14位,高達(dá)200ksps的串行和并行I / O(低功耗,14位,處理速度高達(dá)200ksps,采樣模數(shù)轉(zhuǎn)換器(帶并行和串行的I / O口ADC)的)
文件頁數(shù): 25/28頁
文件大小: 510K
代理商: LTC1418
25
LTC1418
APPLICATIO
S I
N
FOR
ATIO
U
also allows operation when the SCLK frequency is very low
(less than 30kHz). To select the internal conversion clock
tie EXT/INT low. The external SCLK is applied to SCLK. RD
can be used to gate the external SCLK, such that data will
clock only after RD goes low and to three-state D
OUT
after
data transfer. If more than 16 SCLKs are provided, more
zeros will be filled in after the data word indefinitely.
W
U
LTC1418
BUSY
CONVST
CONVST
RD
EXTCLKIN
SCLK
D
OUT
EXT/INT
CS
5V
25
16
24
23
17
26
19
20
1418 F25a
μ
P OR DSP
CLKOUT
INT
C0
SCK
MISO
t
5
t
6
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16
CS = 0, EXT/INT = 5
CONVST
EXTCLKIN
t
13
t
dEXTCLKIN
t
8
HOLD
SAMPLE
t
9
t
7
t
11
BUSY
SCLK
RD
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16
1
2
3
4
12 11 10 9
8
7
6
5
4
3
2
1
0
FILL
ZEROS
D13
Hi-Z
DATA N
Hi-Z
(SAMPLE N)
D
OUT
t
CONV
t
10
1418 F25b
D11
D12
CAPTURE ON
RISING CLOCK
D13
t
15
t
14
SCLK
V
IL
V
OH
V
OL
D
OUT
CAPTURE ON
FALLING CLOCK
t
LSCLK
t
HSCLK
Figure 25. External Conversion Clock Selected. Data Transferred After Conversion
Using an External SCLK. BUSY
Indicates End of Conversion
Using External Conversion Clock and External Data
Clock
. In Figure 25, data is also output after each conver-
sion is completed and before the next conversion is
started. An external clock is used for the conversion clock
and either another or the same external clock is used for
the SCLK. This mode is identical to Figure 24 except that
an external clock is used for the conversion. This mode
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