參數(shù)資料
型號： HCPL7820
元件分類： 運動控制電子
英文描述： High CMR Analog Isolation Amplifiers
中文描述： 高CMR模擬隔離放大器
文件頁數(shù)： 12/15頁
文件大?。?/td> 228K
代理商： HCPL7820
1-244
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 the cur-
rent sensing resistor, or shunt
(R
SENSE
), is applied to the input of
Applications Information
Functional Description
Figure 23 shows the primary
functional blocks of the HCPL-
7820/7825. 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 trans-
mitted to the detector circuit. The
detected signal is decoded and
converted back into an analog
Figure 22. Dependence of Safety-
Limiting Values on Temperature.
VOLTAGE
REGULATOR
CLOCK
GENERATOR
Σ
MODULATOR
ENCODER
LED DRIVE
CIRCUIT
DETECTOR
CIRCUIT
DECODER
AND D/A
FILTER
ISO-AMP
OUTPUT
VOLTAGE
REGULATOR
ISO-AMP
INPUT
ISOLATION
BOUNDARY
Figure 24. Recommended Application Circuit.
Figure 23. HCPL-7820/7825 Block Diagram.
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-7820/7825
C4
R4
10.0 K
C6
75 pF
U3
U1
78L05
IN OUT
C1
μF
C2
μF
μF
R5
39
FLOATING
SUPPLY
GATE DRIVE
CIRCUIT
FLOATING
SUPPLY
HV+
HV–
–
+
R
SENSE
MOTOR
C5
75 pF
C3
C7
R2
2.00 K
P
S
T
A
– TEMPERATURE – °C
150
100
50
50
300
100
150
MAX. OPERATING
TEMP. IS 100 °C
0
200
P
S
, OUTPUT
250
0
200
P
S
, INPUT
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HCPL-7840 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 安裝風格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube
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 安裝風格:SMD/SMT 封裝 / 箱體:SOP-8 封裝:Tube
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