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AD628ARM bảng dữ liệu(PDF) 17 Page - Analog Devices

tên linh kiện AD628ARM
Giải thích chi tiết về linh kiện  High Common-Mode Voltage, Programmable Gain Difference Amplifier
PDF  20 Pages
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nhà sản xuất  AD [Analog Devices]
Trang chủ  http://www.analog.com
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AD628ARM bảng dữ liệu(HTML) 17 Page - Analog Devices

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AD628
Rev. F | Page 17 of 20
5
1
3
4
8
2
7
+Vs
–Vs
6
–IN
+IN
VREF
100kΩ
10kΩ
100kΩ
10kΩ
10kΩ
A1
A2
4
5
6
3
1
2
SCLK
SDATA
CS
GND
VDD
VIN
AD628
SERIAL DATA
REF195
+12V
VOUT
VIN
2
3
4
6
CFILT
RG
10μF
0.1μF
10μF
0.1μF
10μF
0.1μF
10μF
0.1μF
AD7940
+/–10V
15nF
2
3
1 AD8606
1/2
49.9Ω
33nF
+12V
–12V
10kΩ
10kΩ
AD628 REFERENCE VOLTAGE
REXT2
10kΩ
REXT1
15kΩ
AD8606
2/2
5
6
7
4
8
Figure 32. Level Shifter
CURRENT LOOP RECEIVER
Analog data transmitted on a 4 to 20 mA current loop can be
detected with the receiver shown in Figure 33. The AD628 is an
ideal choice for such a function because the current loop is
driven with a compliance voltage sufficient to stabilize the loop,
and the resultant common-mode voltage often exceeds com-
monly used supply voltages. Note that with large shunt values, a
resistance of equal value must be inserted in series with the
inverting input to compensate for an error at the noninverting
input.
MONITORING BATTERY VOLTAGES
Figure 34 illustrates how the AD628 is used to monitor a battery
charger. Voltages approximately eight times the power supply
voltage can be applied to the input with no damage. The resistor
divider action is well-suited for the measurement of many
power supply applications, such as those found in battery
chargers or similar equipment.
6
8
1
4
5
7
2
3
AD628
+15V
+2.5V
9.53k
Ω
–15V
10k
Ω
0V TO 5V
TO ADC
I = 4 TO 20mA
100k
Ω
210k
Ω
100k
Ω
100k
Ω
249
Ω
VCM = 15V
10k
Ω
10k
Ω
249
Ω
Figure 33. Level Shifter for 4 to 20 mA Current Loop



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