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PDF ACPL-C784 Data sheet ( Hoja de datos )
| Número de pieza | ACPL-C784 | |
| Descripción | Miniature Isolation Amplifiers | |
| Fabricantes | AVAGO | |
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ACPL-C78A, ACPL-C780, ACPL-C784
Miniature Isolation Amplifiers
Data Sheet
Description
The ACPL-C78A/C780/C784 isolation amplifier family was
designed for current sensing in electronic motor drives. In
a typical implementation, motor currents flow through an
external resistor and the resulting analog voltage drop is
sensed by the ACPL-C78A/C780/C784. A differential output
voltage is created on the other side of the ACPL-C78A/
C780/C784 optical isolation barrier. This differential output
voltage is proportional to the motor current and can be
converted to a single-ended signal by using an op-amp
as shown in the recommended application circuit. Since
common-mode voltage swings of several hundred volts
in tens of nanoseconds are common in modern switching
inverter motor drives, the ACPL-C78A/C780/C784 was
designed to ignore very high common-mode transient
slew rates (of at least 10 kV/µs).
The high CMR capability of the ACPL-C78A/C780/C784
isolation amplifier provides the precision and stability
needed to accurately monitor motor current in high noise
motor control environments, providing for smoother
control (less “torque ripple”) in various types of motor
control applications.
The product can also be used for general analog signal
isolation applications requiring high accuracy, stability,
and linearity under similarly severe noise conditions. For
general applications, we recommend the ACPL-C780 (gain
tolerance of ±3%) and the ACPL-C784 (gain tolerance of
±5%). For precision applications AvagoTechnologies offers
the ACPL-C78A with part-to-part gain tolerance of ±1%.
The ACPL-C78A/C780/C784 utilizes sigma-delta (∑-∆) an-
alog-to-digital converter technology, chopper stabilized
amplifiers, and a fully differential circuit topology.
Together, these features deliver unequaled isolation-
mode noise rejection, as well as excellent offset and gain
accuracy and stability over time and temperature. This
performance is delivered in a compact, auto-insertable,
Stretched SO-8 (SSO-8) package that meets worldwide
regulatory safety standards.
Features
• 15 kV/µs Common-Mode Rejection at VCM = 1000 V
• Compact, Auto-Insertable Stretched SO-8 Package
• 0.00025 V/V/°C Gain Drift vs. Temperature
• 0.3 mV Input Offset Voltage
• 100 kHz Bandwidth
• 0.004% Nonlinearity
• Worldwide Safety Approval: UL 1577 (5000Vrms/1 min.),
CSA and IEC/EN/DIN EN 60747-5-2
• Advanced Sigma-Delta (∑-∆) A/D Converter Technology
• Fully Differential Amplifier
Applications
• Motor Phase and Rail Current Sensing
• Inverter Current Sensing
• Switched Mode Power Supply Signal Isolation
• General Purpose Current Sensing and Monitoring
• General Purpose Analog Signal Isolation
Functional Diagram
IDD1
VDD1 1
IDD2
8 VDD2
VIN+ 2
VIN- 3
GND1 4
++
--
SHIELD
7 VOUT+
6 VOUT-
5 GND2
NOTE: A 0.1 μF bypass capacitor must be connected between pins 1 and
4 and between pins 5 and 8.
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.
Free Datasheet http://www.datasheet-pdf.com/
1 page  
Absolute Maximum Rating
Parameter
Storage Temperature
Ambient Operating Temperature
Supply Voltages
Steady-State Input Voltage
Two Second Transient Input Voltage
Output Voltages
Lead Solder Temperature
Notes:
1. Non-Halide Flux should be used.
Recommended Operating Conditions
Parameter
Ambient Operating Temperature
Supply Voltages
Input Voltage (linear and accurate)
Input Voltage (functional)
Symbol
Min. Max.
TS
TA
VDD1, VDD2
VIN+, VIN–
–55
–40
0
–2
+125
+100
5.5
VDD1 + 0.5
VIN+, VIN–
–6
VOUT+, VOUT–
–0.5
VDD2 + 0.5
260°C for 10 sec., 1.6 mm below seating plane
Symbol
TA
VDD1, VDD2
VIN+, VIN–
VIN+, VIN–
Min.
–40
4.5
–200
–2
Max.
+85
5.5
+200
2
Units Note
°C
°C
V
V
V
V
1
Units Note
°C
V
mV 1
V
5
Free Datasheet http://www.datasheet-pdf.com/
5 Page 
1
0
-1
-2
-3
-4
10 100 1000 10000
FREQUENCY (Hz)
Figure 12. Gain vs. Frequency.
100000
50
0
-50
-100
-150
-200
-250
-300
10
100 1000 10000
FREQUENCY (Hz)
Figure 13. Phase vs. Frequency.
100000
5.5
4.7 Tpd 10
Tpd 50
3.9
Tpd 90
Trise
3.1
2.3
1.5
-55
-25 5
35
TA - TEMPERATURE - °C
Figure 14. Propagation Delay vs. Temperature.
65
95
VDD1
0.1 F
VIN
0.01 F
1
2
3
4
ACPL-C78A
ACPL-C780
ACPL-C784
VIN IMPEDANCE LESS THAN 10 .
Figure 15. Propagation Delay Test Circuits.
11
10 K
VDD2
8
0.1 F
7 2K
6 2K
+15 V
0.1 F
–
+ MC34081
5 0.1 F
10 K
-15 V
VOUT
Free Datasheet http://www.datasheet-pdf.com/
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet ACPL-C784.PDF ] | |
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