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參數資料
| 型號： | 5962-9755701HYA |
| 元件分類： | 隔離放大器 |
| 英文描述： | ISOLATION AMPLIFIER, 100 kHz BAND WIDTH, CDIP8 |
| 封裝： | HERMETIC SEALED, DIP-8 |
| 文件頁數： | 5/16頁 |
| 文件大小： | 105K |
| 代理商： | 5962-9755701HYA |
13
Applications Information
Functional Description
Figure 23 shows the primary functional blocks of the HCPL-
7850. In operation, the sigma-delta modulator converts
the analog input signal into a high-speed serial bit stream.
The time average of this bit stream is directly proportional
to the input signal. This stream of digital data is encoded
and optically transmitted to the detector circuit. The
detected signal is decoded and converted back into an
analog signal, which is filtered to obtain the final output
signal.
Application Circuit
The recommended application circuit is shown in Figure
24. A floating power supply (which in many applications
could be the same supply that is used to drive the high-
side power transistor) is regulated to 5 V using a simple
three-terminal voltage regulator (U1). The voltage from
Figure 25. Single-Supply Post-Amplifier Circuit.
Figure 26. Top Layer of Printed Circuit
Board Layout.
Figure 27. Bottom Layer of a Printed
Circuit Board Layout.
the current sensing resistor, or shunt (Rsense), is applied
to the input of the HCPL-7850 through an RC anti-aliasing
filter (R5, C3). And finally, the differential output of the
isolation amplifier is converted to a ground-referenced
single-ended output voltage with a simple differential
amplifier circuit (U3 and associated components).
Although the application circuit is relatively simple, a few
recommendations should be followed to ensure optimal
performance.
Supplies and Bypassing
As mentioned above, an inexpensive three-terminal
regulator can be used to reduce the gate-drive power
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.
0.1 F
+5 V
VOUT
8
7
6
1
3
U2
5
2
4
R1
10.0 K
+5 V
C8
0.1 F
–
+
MC34071
R3
10.0 K
HCPL-7850
C4
R4B
20.0 K
C6
150 pF
U3
R4A
20.0 K
+5 V
C5
150 pF
R2
10.0 K
C3
C2
C4
R5
TO RSENSE+
TO RSENSE–
TO VDD1
TO VDD2
VOUT+
VOUT–
Figure 28. Operating Circuit for Burn-In and Steady State Life Tests.
1
2
3
4
8
7
6
5
VDD
VIN+
VIN–
GND
VDD
VOUT+
VOUT–
GND
+
–
+
–
27
27
1 k
(+)
(–)
VDD
5.5 VDC
0.1 F
CONDITIONS: ICC=17.5mA
TA=+125C
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 5962-9755701HYC | 功能描述:光隔離放大器 100kHz 1500Vdc Hermetically sealed RoHS:否 制造商:Avago Technologies 絕緣電壓:5000 Vrms 參考電壓: 電流傳遞比: 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| 5962-9756001Q2A | 制造商:Texas Instruments 功能描述:OR Gate 4-Element 2-IN Bipolar 20-Pin LCCC Tube 制造商:Texas Instruments 功能描述:OR GATE 4-ELEM 2-IN BIPOLAR 20LCCC - Rail/Tube |
| 5962-9756001QCA | 制造商:Texas Instruments 功能描述:OR Gate 4-Element 2-IN Bipolar 14-Pin CDIP Tube 制造商:Texas Instruments 功能描述:OR GATE 4-ELEM 2-IN BIPOLAR 14CDIP - Rail/Tube |
| 5962-9756301HXC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| 5962-9756401QXA | 制造商:Analog Devices 功能描述:Single ADC SAR 200ksps 16-bit Parallel 28-Pin CDIP Tube 制造商:Analog Devices 功能描述:16-BIT 200 KSPS A/D CONVERTER, SERIAL - Rail/Tube 制造商:Analog Devices 功能描述:CONVERTER - ADC |
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