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參數(shù)資料
| 型號： | HCPL-788J |
| 元件分類： | 運動控制電子 |
| 英文描述： | Isolation Amplifier with Short Circuit and Overload Detection(具有短路和過載保護功能的隔離放大器) |
| 中文描述： | 隔離放大器短路和過載檢測（具有短路和過載保護功能的隔離放大器） |
| 文件頁數(shù)： | 14/20頁 |
| 文件大?。?/td> | 277K |
| 代理商： | HCPL-788J |
14
transformer or a high-frequency
DC-DC converter.
An inexpensive 78L05 three-
terminal regulator can also be
used to reduce the floating supply
voltage to 5 V. To help attenuate
high-frequency power supply noise
or ripple, a resistor or inductor
can be used in series with the
input of the regulator to form a
low-pass filter with the regulator’s
input bypass capacitor.
As shown in Figure 25, 0.1
μ
F
bypass capacitors (C1, C3, C4,
and C6) should be located as
close as possible to the pins of
the HCPL-788J. The bypass
capacitors are required because
of the high-speed digital nature of
the signals inside the HCPL-788J.
A 0.01
μ
F bypass capacitor (C2)
is also recommended at the input
due to the switched-capacitor
nature of the input circuit. The
input bypass 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.
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-788J, 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
PC board does not pass directly
below or extend much wider than
the body of the HCPL-788J.
Figure 27. Example Printed Circuit Board Layout.
TOP LAYER
BOTTOM LAYER
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HCPL-788J#500 | 功能描述:隔離放大器 4.5 - 5.5 SV RoHS:否 制造商:Texas Instruments 輸入補償電壓: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-788J/EVAL | 制造商:Avago Technologies 功能描述: |
| HCPL-788J-000E | 功能描述:隔離放大器 4.5 - 5.5 SV RoHS:否 制造商:Texas Instruments 輸入補償電壓: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-788J-500E | 功能描述:隔離放大器 4.5 - 5.5 SV RoHS:否 制造商:Texas Instruments 輸入補償電壓: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-800J | 功能描述:緩沖器和線路驅(qū)動器 PLC Powerline DAA IC RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
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