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參數(shù)資料
| 型號(hào)： | LTC1098L |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 串行ADC |
| 英文描述： | Micropower Sampling 8-Bit I/O A/D Converters(3V，微功耗，采樣8位串行I/O模數(shù)轉(zhuǎn)換器) |
| 中文描述： | 微采樣8位I /辦公自動(dòng)化/ D轉(zhuǎn)換器（3V供電，微功耗，采樣8位串行的I / O模數(shù)轉(zhuǎn)換器） |
| 文件頁(yè)數(shù)： | 16/28頁(yè) |
| 文件大?。?/td> | 368K |
| 代理商： | LTC1098L |
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16
LTC1096/LTC1096L
LTC1098/LTC1098L
1
2
3
4
CS
CLK
DATA (D
IN
/D
OUT
)
START
SGL/DIFF
ODD/SIGN
MSBF
B7
B6
MSBF BIT LATCHED
BY LTC1098(L)
LTC1098(L) CONTROLS DATA LINE AND SENDS
A/D RESULT BACK TO MPU
LTC1098(L) TAKES CONTROL OF
DATA LINE ON 4TH FALLING CLK
MPU CONTROLS DATA LINE AND SENDS
MUX ADDRESS TO LTC1098(L)
PROCESSOR MUST RELEASE
DATA LINE AFTER 4TH RISING CLK
AND BEFORE THE 4TH FALLING CLK
LTC1-96/8 F03
U
S
A
O
PPLICATI
IU
U
Figure 3. LTC1098(L) Operation with D
IN
and D
OUT
Tied Together
CLK edge after the start bit is received (see Figure 3).
Therefore the processor port line must be switched to an
input before this happens, to avoid a conflict.
In the Typical Applications section, there is an example of
interfacing the LTC1098(L) with D
IN
and D
OUT
tied to-
gether to the Intel 8051 MPU.
ACHIEVING MICROPOWER PERFORMANCE
With typical operating currents of 40
μ
A and automatic
shutdown between conversions, the LTC1096/LTC1098
achieves extremely low power consumption over a wide
range of sample rates (see Figure 4). In systems that
convert continuously, the LTC1096/LTC1098 will draw its
normal operating power continuously. Figure 5 shows
that the typical current varies from 40
μ
A at clock rates
below 50kHz to 100
μ
A at 500kHz. Several things must
be taken into account to achieve such a low power
consumption.
Shutdown
Figures 1 and 2 show the operating sequence of the
LTC1096/LTC1098. The converter draws power when the
CS pin is low and powers itself down when that pin is high.
If the CS pin is not taken to ground when it is low and not
taken to supply voltage when it is high, the input buffers of
CLOCK FREQUENCY (Hz)
20
S
C
μ
A
60
80
120
140
100
10k
100k
1M
LTC1096/98 F05
0
1k
100
40
0.002
T
A
= 25°C
V
CC
= 5V
ACTIVE (CS LOW)
SHUTDOWN (CS HIGH)
ACTIVE AND SHUTDOWN MODES
SAMPLE FREQUENCY, f
SMPL
(kHz)
0.1
1
S
C
μ
A
10
100
1000
1
10
100
LTC1096/98 TPC03
T
A
= 25°C
V
CC
= V
REF
= 5V
Figure 4. Automatic Power Shutdown Between Conversions
Allows Power Consumption to Drop with Sample Rate
Figure 5. After a Conversion, When the Microprocessor
Drives CS High, the ADC Automatically Shuts Down Until the
Next Conversion. The Supply Current, Which Is Very Low
During cConversions, Drops to Zero in Shutdown
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1098LAC | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Low Voltage, Micropower Sampling 8-Bit Serial I/O A/D Converters |
| LTC1098LACS8 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Low Voltage, Micropower Sampling 8-Bit Serial I/O A/D Converters |
| LTC1098LAI | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Low Voltage, Micropower Sampling 8-Bit Serial I/O A/D Converters |
| LTC1098LAIS8 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Low Voltage, Micropower Sampling 8-Bit Serial I/O A/D Converters |
| LTC1098LC | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Low Voltage, Micropower Sampling 8-Bit Serial I/O A/D Converters |
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