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參數(shù)資料
| 型號： | LTC1594LCS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | 4- and 8-Channel, 3V Micropower Sampling 12-Bit Serial I/O A/D Converters |
| 中文描述： | 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| 封裝： | 0.150 INCH, PLASTIC, SO-16 |
| 文件頁數(shù)： | 13/24頁 |
| 文件大?。?/td> | 278K |
| 代理商： | LTC1594LCS |
13
LTC1594L/LTC1598L
APPLICATIO
S I
N
FOR
ATIO
U
Operation with D
IN
and D
OUT
Tied Together
The LTC1594L/LTC1598L can be operated with D
IN
and
D
OUT
tied together. This eliminates one of the lines
required to communicate to the microprocessor (MPU).
Data is transmitted in both directions on a single wire.
The processor pin connected to this data line should be
configurable as either an input or an output. The
LTC1594L/LTC1598L will take control of the data line
after CS falling and before the 6th falling CLK while the
processor takes control of the data line when CS is high
W
U
(see Figure 3). Therefore the processor port line must be
switched to an input with CS being low to avoid a conflict.
Separate Chip Selects for MUX and ADC
The LTC1594L/LTC1598L provide separate chip selects,
CSMUX and CSADC, to control MUX and ADC separately.
This feature not only provides the flexibility to select a
particular channel once for multiple conversions (see
Figure 4) but also maximizes the sample rate up to
20ksps (see Figure 5).
Figure 4. Selecting a Channel Once for Multiple Conversions
CLK
EN
D1
D2
CSADC
CSMUX
B5
B6
B7
B8
B9
B10
B11
Hi-Z
D
OUT
CH0 TO
CH7
D
IN
t
CONV
Hi-Z
t
suCS
NULL
BIT
D0
B4
B3
B2
B1
B0
t
SMPL
t
ON
B5
B6
B7
B8
B9
B10
B11
Hi-Z
t
CONV
t
suCS
NULL
BIT
D0
B4
B3
B2
B1
B0
t
SMPL
ADCIN =
MUXOUT
COM = GND
1594L/98L F04
DON’T CARE
DON’T CARE
1
2
3
4
5
6
CS
CLK
DATA (D
IN
/D
OUT
)
EN
D2
D1
D0
B11
B10
LTC1594L/LTC1598L CONTROLS DATA LINE AND SENDS
A/D RESULT BACK TO MPU
LTC1594L/LTC1598L TAKES CONTROL OF DATA
LINE AFTER CS FALLING AND BEFORE THE
6TH FALLING CLK
MPU CONTROLS DATA LINE AND SENDS
MUX ADDRESS TO LTC1594L/LTC1598L
PROCESSOR MUST RELEASE DATA
LINE AFTER CS FALLING AND
BEFORE THE 6TH FALLING CLK
1594L/98L F03
t
suCS
Figure 3. LTC1594L/LTC1598L Operation with D
IN
and D
OUT
Tied Together
相關PDF資料 |
PDF描述 |
|---|---|
| LTC1594LIS | 4- and 8-Channel, 3V Micropower Sampling 12-Bit Serial I/O A/D Converters |
| LTC1598LIG | 4- and 8-Channel, 3V Micropower Sampling 12-Bit Serial I/O A/D Converters |
| LTC1598L | 4- and 8-Channel, 3V Micropower Sampling 12-Bit Serial I/O A/D Converters |
| LTC1598LCG | Replaced by ADS7961 : 8-Bit, 76 kSPS ADC Serial Out, On-Chip 20 Ch. Analog Mux, 19 Ch. 28-PLCC |
| LTC1594L | 4- Channel, 3V Micropower Sampling 12-Bit Serial I/O A/D Converters(四通道,3V微功耗采樣12位串行輸入/輸出模數(shù)轉換器) |
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