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HCPL-7820#300 Datasheet

  • HCPL-7820#300

  • Isolation Amplifier

  • 15頁

  • ETC

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H
OPTOCOUPLERS
High CMR Analog Isolation
Amplifiers
Technical Data
HCPL-7820
HCPL-7825
Features
鈥?Fast Propagation Delays for
Over-Current and Fault
Detection Sensing
鈥?High Common Mode
Rejection (CMR): 30 kV/
碌
s at
V
CM
= 1000 V*
鈥?3% Gain Tolerance:
HCPL-7820
5% Gain Tolerance:
HCPL-7825
鈥?0.05% Nonlinearity
鈥?Low Offset Voltage and Off-
set Drift vs. Temperature
鈥?200 kHz Bandwidth
鈥?Performance Specified for
Common Motor Control
Applications over -40
擄
C to
100
擄
C Temperature Range
鈥?Worldwide Safety and
Regulatory Approval: UL
1577 (3750 V rms/1 Min),
VDE 0884 and CSA
鈥?Compact Auto-Insertable
Standard 8-Pin DIP Package
鈥?Advanced Sigma-Delta (危
鈭?/div>
)
A/D Converter Technology
鈥?1
碌
m CMOS IC Technology
Applications
鈥?Motor Phase and Rail
Current Sensing
鈥?General Purpose Current
Sensing and Monitoring
鈥?High-Voltage Monitoring
鈥?Switched Mode Power
Supply Signal Isolation
鈥?General Purpose Analog
Signal Isolation
鈥?Transducer Isolation
Description
The HCPL-7820/7825 high CMR
isolation amplifier consists of a
sigma-delta analog-to-digital
converter optically coupled to an
integrated output digital-to-analog
converter. When used with a
shunt resistor in the current path,
the HCPL-7820/7825 provides a
cost-effective, auto-insertion
compatible current sense solution.
Fast propagation delays allow this
part to be used in either motor
drive or inverter applications for
either phase current monitoring
or rail current fault detection
applications. High isolation mode
rejection makes this product
suitable for noisy electrical
environments, such as those
generated by the high switching
rates of power IGBTs. Low offset
voltage together with low offset
change vs. temperature permits
accurate use of auto-calibration
techniques. Tight gain tolerance
with good nonlinearity further
provide the characteristics needed
to insure highly accurate motor
speed control. A high operating
temperature range with specified
performance parameters allow
Functional Diagram
V
DD1
1
I
DD1
I
DD2
8
V
DD2
V
IN+
2
+
+
7
V
OUT+
V
IN鈥?/div>
3
鈥?/div>
鈥?/div>
6
V
OUT鈥?/div>
GND1
4
5
GND2
CMR SHIELD
A 0.1
碌
F bypass capacitor must be connected between pins 1 and 4 and between pins 5 and 8.
*The terms common-mode rejection (CMR) and isolation-mode rejection (IMR) are used interchangeably throughout this data sheet.
CAUTION: It is advised that normal static precautions be taken in handling and assembly of this component to
prevent damage and/or degradation which may be induced by ESD.
5965-3591E
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