參數(shù)資料
型號： LTC2414IGN
廠商： LINEAR TECHNOLOGY CORP
元件分類： ADC
英文描述： 8-/16-Channel 24-Bit No Latency TM ADCs
中文描述： 8-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28
封裝： 0.150 INCH, PLASTIC, SSOP-28
文件頁數(shù)： 19/48頁
文件大小： 775K
代理商： LTC2414IGN
LTC2414/LTC2418
19
241418fa
Table 6. LTC2414/LTC2418 Interface Timing Modes
Conversion
Cycle
Control
CS and SCK
SCK
CS
↓
Continuous
Data
Output
Control
CS and SCK
SCK
CS
↓
Internal
Connection
and
Waveforms
Figures 5, 6
Figure 7
Figures 8, 9
Figure 10
SCK
Source
External
External
Internal
Internal
Configuration
External SCK, Single Cycle Conversion
External SCK, 3-Wire I/O
Internal SCK, Single Cycle Conversion
Internal SCK, 3-Wire I/O, Continuous Conversion
last input bit A0 of SDI by the time CS pulled HIGH, the
address information is discarded and the previous
address is kept.
Finally, CS can be used to control the free-running modes
of operation, see Serial Interface Timing Modes section.
Grounding CS will force the ADC to continuously convert
at the maximum output rate selected by F
O
.
SERIAL INTERFACE TIMING MODES
The LTC2414/LTC2418’s 4-wire interface is SPI and
MICROWIRE compatible. This interface offers several
flexible modes of operation. These include internal/exter-
nal serial clock, 3- or 4-wire I/O, single cycle conversion.
The following sections describe each of these serial inter-
face timing modes in detail. In all these cases, the con-
verter can use the internal oscillator (F
O
= LOW or F
O
=
HIGH) or an external oscillator connected to the F
O
pin.
Refer to Table 6 for a summary.
External Serial Clock, Single Cycle Operation
(SPI/MICROWIRE Compatible)
This timing mode uses an external serial clock to shift out
the conversion result and a CS signal to monitor and
control the state of the conversion cycle, see Figure 5.
APPLICATIOU
W
U
U
Figure 5. External Serial Clock, Single Cycle Operation
EOC
BIT 31
SDO
SCK
(EXTERNAL)
CS
(1)
(0)
EN
SGL
A2
A1
A0
ODD/
SIGN
SDI
DON’T CARE
TEST EOC
PARITY
MSB
SIG
BIT 0
LSB
BIT 6
BIT 27
BIT 26
BIT 25
BIT 24
BIT 28
BIT 29
BIT 30
SLEEP
SLEEP
DATA OUTPUT
CONVERSION
241418 F05
CONVERSION
Hi-Z
Hi-Z
Hi-Z
TEST EOC
V
CC
F
O
REF
+
REF
–
CH0
CH7
CH8
CH15
COM
SCK
SDI
SDO
CS
GND
9
19
11
12
21
28
1
8
10
18
17
15
16
20
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG
INPUTS
= 50Hz REJECTION
= EXTERNAL OSCILLATOR
= 60Hz REJECTION
V
CC
1
μ
F
2.7V TO 5.5V
LTC2414/
LTC2418
4-WIRE
SPI INTERFACE
DON’T CARE
TEST EOC
(OPTIONAL)
相關(guān)PDF資料
PDF描述
LTC2418CGN 8-/16-Channel 24-Bit No Latency TM ADCs
LTC2418IGN 8-/16-Channel 24-Bit No Latency TM ADCs
LTC2415-1CGN 24-Bit No Latency ADCs with Differential Input and Differential Reference
LTC2415-1IGN 24-Bit No Latency ADCs with Differential Input and Differential Reference
LTC2415CGN 24-Bit No Latency ADCs with Differential Input and Differential Reference
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