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ADS1174IPAPR датащи(PDF) 20 Page - Texas Instruments

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номер детали ADS1174IPAPR
подробное описание детали  Quad/Octal, Simultaneous Sampling, 16-Bit Analog-to-Digital Converters
PDF  35 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
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ADS1174IPAPR датащи(HTML) 20 Page - Texas Instruments

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DOUT MODES
TDM Mode
CH1
DOUT1
(
)
ADS1174
SCLK
DRDY
(SPI)
FSYNC
(Frame-Sync)
1
2
16
17
15
32
33
31
48
49
47
64
65
63
67
66
CH1
DOUT1
(
)
ADS1178
113
CH2
CH2
CH3
CH3
CH4
CH4
DIN
CH5
127
CH8
DIN
128
129
130
131
CH1
DOUT1
(
)
ADS1174
CH2
CH3
DIN
CH4
SCLK
DRDY
(SPI)
FSYNC
(Frame-Sync)
1
2
16
17
15
32
33
31
48
49
47
64
65
63
66
67
CH1
DOUT1
(
)
ADS1178
CH2
CH3
CH5
CH4
113
CH8
DIN
127
128
129
130
131
ADS1174
ADS1178
SBAS373 – OCTOBER 2007
output from another ADS1174, ADS1178, or other
compatible device. Note that when all channels of the
For both SPI and Frame-Sync interface protocols,
ADS1174/78 are powered-down, the interface is
either the data are shifted out through individual
powered-down,
rendering
the
DIN
input
channel DOUT pins in a parallel data format (Discrete
powered-down as well. When one or more channels
mode), or the data for all channels are shifted out in
of the device are powered-down, the data format of
series through common pin DOUT1 (TDM mode).
the TDM mode can be fixed or dynamic.
TDM Mode, Fixed-Position Data
In TDM (time division multiplexed) data output mode,
In this TDM data output mode, the data position of
the data for all channels are shifted out, in series, on
the channels remains fixed, regardless of whether
a single pin (DOUT1). As shown in Figure 17, the
channels are disabled. If a channel is powered-down,
data from channel 1 are shifted out first, followed by
data are forced to zero but occupies the same
channel 2 data, etc. After the data from the last
position within the data stream. Figure 18 shows the
channel are shifted out (channel 4 for the ADS1174
data
stream
with
channel
1
and
channel
3
or channel 8 for the ADS1178), the data from the DIN
powered-down.
input follow. The DIN is used to daisy-chain the data
Figure 17. TDM Mode (All Channels Enabled)
Figure 18. TDM Mode, Fixed-Position Data (Channels 1 and 3 Shown Powered-Down)
20
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Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): ADS1174 ADS1178



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