參數(shù)資料
型號(hào)： LTC2411IMS#TRPBF
廠商： Linear Technology
文件頁(yè)數(shù)： 8/40頁(yè)
文件大?。?/td> 0K
描述： IC A/D CONV 24BIT MICRPWR 10MSOP
標(biāo)準(zhǔn)包裝： 2,500
位數(shù)： 24
采樣率（每秒）： 7.5
數(shù)據(jù)接口： MICROWIRE?，串行，SPI?
轉(zhuǎn)換器數(shù)目： 2
功率耗散（最大）： 1mW
電壓電源： 單電源
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 10-TFSOP，10-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： 10-MSOP
包裝： 帶卷 (TR)
輸入數(shù)目和類(lèi)型： 1 個(gè)差分，雙極
LTC2411/LTC2411-1
16
Figure 5. External Serial Clock, Single Cycle Operation
Table 4. LTC2411/LTC2411-1 Interface Timing Modes
Conversion
Data
Connection
SCK
Cycle
Output
and
Configuration
Source
Control
Waveforms
External SCK, Single Cycle Conversion
External
CS and SCK
Figures 5, 6
External SCK, 2-Wire I/O
External
SCK
Figure 7
Internal SCK, Single Cycle Conversion
Internal
CS
↓
CS
↓
Figures 8, 9
Internal SCK, 2-Wire I/O, Continuous Conversion
Internal
Continuous
Internal
Figure 10
EOC
BIT 31
SDO
SCK
(EXTERNAL)
CS
TEST EOC
SUB LSB
MSB
SIG
BIT 0
LSB
BIT 5
BIT 27
BIT 26
BIT 28
BIT 29
BIT 30
SLEEP
DATA OUTPUT
CONVERSION
2411 F05
CONVERSION
Hi-Z
TEST EOC
VCC
FO
REF+
REF–
SCK
IN+
IN–
SDO
GND
CS
110
2
3
9
4
5
8
6
7
REFERENCE
VOLTAGE
0.1V TO VCC
ANALOG INPUT RANGE
–0.5VREF TO 0.5VREF
= 50Hz REJECTION (LTC2411)
= EXTERNAL OSCILLATOR
= 60Hz REJECTION (LTC2411)
= SIMULTANEOUS 50Hz/60Hz REJECTION (LTC2411-1)
VCC
1
F
2.7V TO 5.5V
LTC2411/
LTC2411-1
3-WIRE
SPI INTERFACE
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 FO.
SERIAL INTERFACE TIMING MODES
The LTC2411/LTC2411-1’s 3-wire interface is SPI and
MICROWIRE compatible. This interface offers several
flexible modes of operation. These include internal/exter-
nal serial clock, 2- or 3-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
converter can use the internal oscillator (FO = LOW or FO
= HIGH) or an external oscillator connected to the FO pin.
Refer to Table 4 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.
The serial clock mode is selected on the falling edge of CS.
To select the external serial clock mode, the serial clock pin
(SCK) must be LOW during each CS falling edge.
The serial data output pin (SDO) is Hi-Z as long as CS is
HIGH. At any time during the conversion cycle, CS may be
pulled LOW in order to monitor the state of the converter.
While CS is pulled LOW, EOC is output to the SDO pin.
EOC = 1 while a conversion is in progress and EOC = 0 if
the device is in the sleep state. Independent of CS, the
APPLICATIO S I FOR ATIO
WU
UU
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