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PDF HCPL7820 Data sheet ( Hoja de datos )
| Número de pieza | HCPL7820 | |
| Descripción | High CMR Analog Isolation Amplifiers | |
| Fabricantes | Agilent(Hewlett-Packard) | |
| Logotipo | .gif "Agilent(Hewlett-Packard)"){kind=logo} |
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H
High CMR Analog Isolation
Amplifiers
Technical Data
HCPL-7820
HCPL-7825
Features
• Fast Propagation Delays for
Over-Current and Fault
Detection Sensing
• High Common Mode
Rejection (CMR): 30 kV/µs at
VCM = 1000 V*
• 3% Gain Tolerance:
HCPL-7820
5% Gain Tolerance:
HCPL-7825
• 0.05% Nonlinearity
• Low Offset Voltage and Off-
set Drift vs. Temperature
• 200 kHz Bandwidth
• Performance Specified for
Common Motor Control
Applications over -40°C to
100°C Temperature Range
• Worldwide Safety and
Regulatory Approval: UL
1577 (3750 V rms/1 Min),
VDE 0884 and CSA
• Compact Auto-Insertable
Standard 8-Pin DIP Package
• Advanced Sigma-Delta (Σ∆)
A/D Converter Technology
• 1 µm CMOS IC Technology
Applications
• Motor Phase and Rail
Current Sensing
• General Purpose Current
Sensing and Monitoring
• High-Voltage Monitoring
• Switched Mode Power
Supply Signal Isolation
• General Purpose Analog
Signal Isolation
• 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
VDD1 1 IDD1
IDD2 8 VDD2
VIN+ 2
+
+ 7 VOUT+
VIN– 3
–
– 6 VOUT–
4
GND1
CMR SHIELD
5
GND2
A 0.1 µF 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
1-233
1 page  
Absolute Maximum Ratings
Parameter
Storage Temperature
Ambient Operating Temperature
Supply Voltages
Steady-State Input Voltage
Two Second Transient Input Voltage
Output Voltages
Lead Solder Temperature
(1.6 mm below seating plane, 10 sec.)
Reflow Temperature Profile
Symbol
TS
TA
VDD1, VDD2
VIN+, VIN-
VOUT+, VOUT-
TLS
Min.
-55
- 40
0.0
-2.0
-6.0
-0.5
Max.
125
100
5.5
VDD1 +0.5
VDD2 +0.5
260
Unit
°C
°C
V
V
V
°C
Note
1
See Package Outline Drawings Section
Recommended Operating Conditions
Parameter
Symbol
Ambient Operating Temperature
Supply Voltages
Input Voltage
TA
VDD1, VDD2
VIN+, VIN-
Min.
-40
4.5
-200
Max.
100
5.5
200
Unit
°C
V
mV
Note
2
1-237
5 Page 
10 K
12
TA = 100°C
VDD1 = 5 V
TA = 25°C
VDD2 = 5 V
TA = -40°C
VIN– = 0 V
11
10
9
8
-0.4 -0.2 0 0.2 0.4
VIN+ – INPUT VOLTAGE – V
78L05
IN OUT
0.1 0.1
µF µF
9V
VDD2
18
27
HCPL-7820/7825
36
0.1 µF
2K
2K
75 pF
+15 V
0.1 µF
–
+ MC34081
45
PULSE GEN.
+–
VIM
10 K
75
pF
0.1 µF
-15 V
Figure 15. Output Supply Current vs.
Input Voltage.
Figure 16. Isolation Mode Rejection Test Circuit.
10 K
VOUT
VDD1
VDD2
0.1 µF
VIN
0.01 µF
18
27
HCPL-7820/7825
36
0.1 µF
2K
2K
+15 V
0.1 µF
–
+ MC34081
45
0.1 µF
10 K
-15 V
VOUT
3.0
2.5
2.0 VDD1 = 5 V
VDD2 = 5 V
DELAY TO 90%
DELAY TO 50%
RISE/FALL TIME
1.5
1.0
-40 -20
VIN– = 0 V
VIN+ = 0 TO 100 mV STEP
0 20 40 60 80 100
TA – TEMPERATURE – °C
Figure 17. Propagation Delay, Rise/Fall Time and Bandwidth Test Circuit.
Figure 18. Propagation Delays and
Rise/Fall Time vs. Temperature.
0
-1
VDD1 = 5 V
VDD2 = 5 V
TA = 25 °C
-2
-3
-4
1
5 10
50 100
500
f – FREQUENCY – kHz
260
250
240
230
220
210
VDD1 = 5 V
VDD2 = 5 V
200
190
-40 -20 0 20 40 60 80 100
TA – TEMPERATURE – °C
3.0
VIN+ = 200 mV
2.5
VIN+ = 100 mV
VIN+ = 0 mV
2.0 VDD1 = 5 V
VDD2 = 5 V
VIN– = 0 V
1.5 TA = 25 °C
1.0
0.5
0
5 10
50 100
500 1000
f – FREQUENCY – kHz
Figure 19. Amplitude Response vs.
Frequency.
Figure 20. 3 dB Bandwidth vs.
Temperature.
Figure 21. RMS Input-Referred Noise
vs. Recommended Application Circuit
Bandwidth.
1-243
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet HCPL7820.PDF ] | |
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