HCPL-788J Avago Technologies US Inc., HCPL-788J Datasheet - Page 20

• Manufacturer Part Number: HCPL-788J
• Description: OPTOCOUPLR AMP CURR SENSE 16SOIC
• Manufacturer: Avago Technologies US Inc.
• Series: -r
• Type: Current Sensorr

Specifications of HCPL-788J

• Package Type: SOIC
• Operating Supply Voltage (typ): 5V
• Voltage - Isolation: 3750Vrms
• Input Type: DC
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.295", 7.50mm Width)
• No. Of Amplifiers: 1
• Input Offset Voltage: 3mV
• Bandwidth: 30kHz
• Isolation Voltage: 3.75kV
• Supply Voltage Range: ± 4.5V To ± 5.5V
• Supply Current: 20mA
• Amplifier Case Style: SOIC
• No. Of Pins: 16
• Rohs Compliant: No
• Lead Free Status / RoHS Status: Not Compliant

5. Power Supplies and Start-Up
6. Miscellaneous
For product information and a complete list of distributors, please go to our website:
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries.
Data subject to change. Copyright © 2005-2010 Avago Technologies. All rights reserved. Obsoletes AV01-0570EN
AV02-1546EN - February 8, 2010
5.1: What are the output voltages before
5.2: How long does the HCPL-788J take
6.1: How does the HCPL-788J measure
6.2: What load capacitance can the HCPL-
6.3: Can I use the HCPL-788J with a
the input side power supply is turned
on?
to begin working properly after
power-up?
negative signals with only a +5 V
supply?
788J drive?
bipolar input A/D converter?
V
in the high (inactive) state when power to the input side is off. In fact, a self test can
be performed using this information. In a motor drive, it is possible to turn off all the
power transistors and thus cause all the sense resistor voltages to be zero. In this case,
finding V
indicates that power to the input side is not on.
About 50 μs after a V
The inputs have a series resistor for protection against large negative inputs. Normal
signals are no more than 200 mV in amplitude. Such signals do not forward bias any
junctions sufficiently to interfere with accurate operation of the switched capacitor
input circuit.
Typically, noticeable ringing and overshoot begins for C
recommends keeping the load capacitance under 5000 pF (at pin 12). ABSVAL (pin
13) typically exhibits no instability at any load capacitance, but speed of response
gradually slows above 470 pF load.
Yes, with a compromise on offset accuracy. One way to do this is by connecting +2.5
V to pins 10, 11, and 15 and connecting -2.5 V to pins 9 and 16 with 0.1 μF bypass
capacitors from +2.5 V to -2.5 V and from -2.5 V to ground. Note that FAULT cannot
swing above 2.5 V in this case, so a level shifter may be needed. Alternately, a single 5
V supply could be power the HCPL-788J which could drive an op amp configured to
subtract
OUT
(pin 12) is close to zero volts, ABSVAL (pin 13) is close to V
1
OUT
/
2
of V
less than
REF
from V
DD2
1
/
4
www.avagotech.com
power-up and 100 μs after a V
of V
OUT
.
REF
, ABSVAL more than
3
/
4
of V
DD1
REF
power-up.
and FAULT in the high state
LOAD
REF
above 0.02 μF. Avago
and FAULT (pin 14) is