參數(shù)資料
型號(hào)： HCPL-7840
元件分類： 運(yùn)動(dòng)控制電子
英文描述： Isolation Amplifier(隔離放大器)
中文描述： 隔離放大器（隔離放大器）
文件頁(yè)數(shù)： 13/19頁(yè)
文件大小： 244K
代理商： HCPL-7840
13
As shown in Figure 18, 0.1
μ
F
bypass capacitors (C1, C2)
should be located as close as
possible to the pins of the HCPL-
7840. The bypass capacitors are
required because of the high-
speed digital nature of the signals
inside the HCPL-7840. A 0.01
μ
F
bypass capacitor (C2) is also
recommended at the input due to
the switched-capacitor also forms
part of the anti-aliasing filter,
which is recommended to prevent
high-frequency noise from
aliasing down to lower
frequencies and interfering with
the input signal. The input filter
also performs an important
reliability function—it reduces
transient spikes from ESD events
flowing through the current
sensing resistor.
0.1 μF
+5 V
V
OUT
8
7
6
1
3
U2
5
2
4
R1
2.00 K
+15 V
C8
0.1 μF
0.1 μF
-15 V
–
+
MC34081
R3
10.0 K
HCPL-7840
C4
R4
10.0 K
C6
150 pF
U3
U1
78L05
IN OUT
C1
0.1
μF
C2
μF
μF
R5
68
GATE DRIVE
CIRCUIT
POSITIVE
FLOATING
SUPPLY
HV+
HV–
–
+
R
SENSE
MOTOR
C5
150 pF
C3
C7
R2
2.00 K
Figure 18: Recommended Application Circuit.
PC Board Layout
The design of the printed circuit
board (PCB) should follow good
layout practices, such as keeping
bypass capacitors close to the
supply pins, keeping output
signals away from input signals,
the use of ground and power
planes, etc. In addition, the
layout of the PCB can also affect
the isolation transient immunity
(CMTI) of the HCPL-7840, due
primarily to stray capacitive
coupling between the input and
the output circuits. To obtain
optimal CMTI performance, the
layout of the PC board should
minimize any stray coupling by
maintaining the maximum
possible distance between the
input and output sides of the
circuit and ensuring that any
ground or power plane on the
Figure 19. Example Printed Circuit Board Layout.
C3
C2
C4
R5
TO R
SENSE+
TO R
SENSE–
TO V
DD1
TO V
DD2
V
OUT+
V
OUT–
PC board does not pass directly
below or extend much wider than
the body of the HCPL-7840.
相關(guān)PDF資料
PDF描述
HCPL-7850 Hermetically Sealed Analog Isolation Amplifier(密封模擬隔離放大器)
HCPL-7851 Hermetically Sealed Analog Isolation Amplifier(密封模擬隔離放大器)
HCPL-7870 Isolated 15-bit A/D Converter(隔離15位A/D轉(zhuǎn)換器)
HCPL-788J Isolation Amplifier with Short Circuit and Overload Detection(具有短路和過(guò)載保護(hù)功能的隔離放大器)
HCPL-810J PLC Powerline DAA IC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HCPL-7840#060 功能描述:隔離放大器 4.5 - 5.5 SV 8 dB RoHS:否 制造商:Texas Instruments 輸入補(bǔ)償電壓:1.5 mV 共模抑制比（最小值）:95 dB 帶寬:60 KHz 工作電源電壓:3.3 V 電源電流:8 mA 工作溫度范圍:- 40 C to + 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube
HCPL-7840#300 功能描述:隔離放大器 4.5 - 5.5 SV 8 dB RoHS:否 制造商:Texas Instruments 輸入補(bǔ)償電壓:1.5 mV 共模抑制比（最小值）:95 dB 帶寬:60 KHz 工作電源電壓:3.3 V 電源電流:8 mA 工作溫度范圍:- 40 C to + 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube
HCPL-7840#360 功能描述:隔離放大器 4.5 - 5.5 SV 8 dB RoHS:否 制造商:Texas Instruments 輸入補(bǔ)償電壓:1.5 mV 共模抑制比（最小值）:95 dB 帶寬:60 KHz 工作電源電壓:3.3 V 電源電流:8 mA 工作溫度范圍:- 40 C to + 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube
HCPL-7840#500 功能描述:隔離放大器 4.5 - 5.5 SV 8 dB RoHS:否 制造商:Texas Instruments 輸入補(bǔ)償電壓:1.5 mV 共模抑制比（最小值）:95 dB 帶寬:60 KHz 工作電源電壓:3.3 V 電源電流:8 mA 工作溫度范圍:- 40 C to + 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube
HCPL-7840#560 功能描述:隔離放大器 4.5 - 5.5 SV 8 dB RoHS:否 制造商:Texas Instruments 輸入補(bǔ)償電壓:1.5 mV 共模抑制比（最小值）:95 dB 帶寬:60 KHz 工作電源電壓:3.3 V 電源電流:8 mA 工作溫度范圍:- 40 C to + 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube
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