ACPL-782T
Automotive Isolation Amplier
with R
2
Coupler™ Isolation
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.
Description
The ACPL-782T isolation amplier was designed for
voltage and current sensing in electronic motor drives
and battery system monitoring. In a typical implementa-
tion, and motor currents ow through an external resistor
and the resulting analog voltage drop is sensed by the
ACPL-782T. A dierential output voltage is created on the
other side of the ACPL-782T optical isolation barrier. This
dierential 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 ap-
plication circuit. Since common-mode voltage swings
of several hundred volts in tens of nanoseconds are
common in modern switching inverter motor drives, the
ACPL-782T was designed to ignore very high common-
mode transient slew rates (of at least 10 kV/Ps).
The high CMR capability of the ACPL-782T isolation
amplier provides the precision and stability needed to ac-
curately monitor motor current and DC rail voltage in high
noise motor control environments, providing for smoother
control (less “torque ripple”) in various t ypes 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. The
ACPL-782T utilizes sigma delta (6') analog-to-digital
converter technology, chopper stabilized ampliers, and
a fully dierential circuit topology.
Together, these features deliver unequaled isolation-
mode noise rejection, as well as excellent oset and
gain accuracy and stability over time and temperature.
This performance is delivered in a compact, auto-insert-
able, industry standard 8-pin DIP package that meets
worldwide regulatory safety standards. (A gull-wing
surface mount option -300E is also available).
Avago R
2
Coupler isolation products provide the rein-
forced insulation and reliability needed for critical in auto-
motive and high temperature industrial applications.
Features
x ±2% Gain Tolerance @ 25°C
x 15 kV/Ps Common-Mode Rejection at V
CM
= 1000V
x 30ppm/°C Gain Drift vs. Temperature
x 0.3 mV Input Oset Voltage
x 100 kHz Bandwidth
x 0.004% Nonlinearity
x Compact, Auto-Insertable Standard 8-pin DIP Package
x Worldwide Safety Approval:
– UL 1577 (3750 V
RMS
/1 min.) and
– CSA
– IEC 60747-5-5, DIN EN 60747-5-2(VDE 0884 Teil 2)
x Qualied to AEC-Q100 Test Guidelines
x Automotive Operating Temperature -40 to 125°C
x Advanced Sigma-Delta (6') A/D Converter Technology
x Fully Dierential Circuit Topology
Applications
x Automotive Motor Inverter Current/Voltage Sensing
x Automotive AC/DC and DC/DC converter Current/
Voltage sensing
x Automotive Battery ECU
x Automotive Motor Phase Current Sensing
x Isolation Interface for Temperature Sensing
x General Purpose Current Sensing and Monitoring
Functional Diagram
Lead (Pb) Free
RoHS 6 fully
compliant
RoHS 6 fully compliant options available;
-xxxE denotes a lead-free product
The connection of a 0.1 PF bypass capacitor between
pins 1 and 4, pins 5 and 8 is recommended.
1
2
3
4
8
7
6
5
I
DD1
V
DD1
V
IN+
V
IN-
GND1
I
DD2
V
DD2
V
OUT+
V
OUT-
GND2
+
-
+
-
SHIELD
