參數(shù)資料
型號: LTC1658
廠商: Linear Technology Corporation
英文描述: 14-Bit Rail-to-Rail Micropower DAC in MSOP(14位,微功耗滿幅度電壓輸出數(shù)模轉(zhuǎn)換器(8腳MSOP封裝))
中文描述: 14位軌至軌微援會采用MSOP(14位,微功耗滿幅度電壓輸出數(shù)模轉(zhuǎn)換器(八腳型MSOP封裝))
文件頁數(shù): 9/12頁
文件大?。?/td> 232K
代理商: LTC1658
9
LTC1658
An Optoisolated 4mA to 20mA Process Controller
CLK
D
IN
CS/LD
1
μ
F
IN
OUT
Q1
2N3440
R
S
10
I
OUT
V
3.8V TO 30V
V
CC
REF
V
OUT
FROM
OPTO-
ISOLATED
INPUTS
LTC1658
1658 TA04
LT
1121-3.3
3.01k
1%
+
+
LT1077
1k
20k
237k
1%
5k
60.4k
1%
OPTOISOLATORS
500
3.3V
3.6k
4N28
CLK
D
IN
CS/LD
CLK
D
IN
CS/LD
This circuit shows how to use an LTC1658 to make an
optoisolated digitally controlled 4mA to 20mA process
controller. The controller circuitry, including the
optoisolation, is powered by the loop voltage that can have
a wide range of 3.8V to 30V. The 3.3V output of the
LT1121-3.3 is used for the 4mA offset current and V
OUT
is
used for the digitally controlled 0mA to 16mA current. R
S
is a sense resistor and the op amp modulates the transis-
tor Q1 to provide the 4mA to 20mA current through this
resistor. The potentiometers allow for offset and full-scale
adjustment. The control circuitry dissipates well under the
4mA budget at zero-scale.
TYPICAL APPLICATIO S
相關(guān)PDF資料
PDF描述
LTC1659 12-Bit Rail-to-Rail Micropower DAC in MSOP Package(12位,微功耗滿幅度電壓輸出數(shù)模轉(zhuǎn)換器(8腳MSOP封裝))
LTC1668 16-Bit, 50Msps Differential Current OutputDAC(16位,50Msps,差分電流輸出數(shù)模轉(zhuǎn)換器)
LTC1693-1 High Speed Dual N-Channel MOSFET Drivers(高速,雙路P溝道MOS場效應(yīng)管驅(qū)動(dòng)器(2個(gè)同相驅(qū)動(dòng)器))
LTC1693-2 High Speed Dual N-Channel MOSFET Drivers(高速,雙路P溝道MOS場效應(yīng)管驅(qū)動(dòng)器(1個(gè)同相和1個(gè)反相驅(qū)動(dòng)器))
LTC1693-3 High Speed Single N-Channel MOSFET Drivers(高速,單路P溝道MOS場效應(yīng)管驅(qū)動(dòng)器)
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