參數(shù)資料
型號: LTC1418IN
廠商: LINEAR TECHNOLOGY CORP
元件分類: ADC
英文描述: Low Power, 14-Bit, 200ksps ADC with Serial and Parallel I/O
中文描述: 1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PDIP28
封裝: 0.300 INCH, PLASTIC, DIP-28
文件頁數(shù): 23/28頁
文件大小: 712K
代理商: LTC1418IN
23
LTC1418
APPLICATIO
S I
N
FOR
ATIO
U
serial port after transferring the serial output data by
tying it to the RD pin.
Figures 22 to 25 show several serial modes of operation,
demonstrating the flexibility of the LTC1418 serial port.
W
U
clock and the SCLK. The internal clock has been optimized
for the fastest conversion time, consequently this mode
can provide the best overall speed performance. To select
an internal conversion clock, tie EXT/INT (Pin 20) low. The
internal clock appears on CLKOUT (Pin 18) which can be
tied to SCLK (Pin 17) to supply the SCLK.
Using External Clock for Conversion and Data Transfer
.
In Figure 23, data from the previous conversion is output
during the conversion with an external clock providing
both the conversion clock and the shift clock. To select an
external conversion clock, tie EXT/INT high and apply the
Figure 23. External Conversion Clock Selected. Data Transferred During Conversion Using
the External Clock (External Clock Drives Both EXTCLKIN and SCLK)
Serial Data Output During a Conversion
Using Internal Conversion Clock
for Conversion and
Data Transfer
. Figure 22 shows data from the previous
conversion being clocked out during the conversion with
the LTC1418 internal clock providing both the conversion
D12
D11
D11
D12
CAPTURE ON
RISING CLOCK
D13
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
FILL
ZEROS
D13
1
t
5
t
6
t
10
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
3
D13
D13
D12
D11
Hi-Z
Hi-Z
DATA N
DATA (N – 1)
t
CONV
(SAMPLE N)
(SAMPLE N + 1)
D
OUT
CS = 0, EXT/INT = 5
EXTCLKIN (= SCLK)
CONVST
t
13
t
8
SAMPLE
HOLD
HOLD
t
dEXTCLKIN
t
7
t
11
1418 F23b
BUSY (= RD)
t
15
t
14
t
LEXTCLKIN
t
HEXTCLKIN
EXTCLKIN
(= SCLK)
V
IL
V
OH
V
OL
D
OUT
CAPTURE ON
FALLING CLOCK
LTC1418
BUSY (= RD)
EXTCLKIN ( = SCLK)
BUSY
CONVST
CONVST
RD
EXTCLKIN
SCLK
D
OUT
EXT/INT
D
OUT
CS
5V
25
20
19
26
24
17
16
23
1418 F23a
μ
P OR DSP
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