ACPL-C87B, ACPL-C87A, ACPL-C870
Precision Optically Isolated Voltage Sensor
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.
Features
Advanced Sigma-Delta (Σ-∆) Modulation Technology
Unity Gain 1 V/V, ±0.5% High Gain Accuracy (ACPL-C87B)
1 G Input Impedence
0 to 2 V Nominal Input Range
-35 ppm/°C Low Gain Drift
21 V /°C O set Voltage Drift
0.1% Non-Linearity Max
Active-High Shutdown Pin
100 kHz Wide Bandwidth
3 V to 5.5 V Wide Supply Range for Output Side
-40° C to +105° C Operating Temperature Range
15 kV/s Common-Mode Transient Immunity
Compact, Auto-Insertable Stretched SO-8 Package
Safety and Regulatory Approvals:
– IEC/EN/DIN EN 60747-5-5: 1414 V
peak
working
insulation voltage
– UL 1577: 5000 V
rms
/1 min double protection rating
– CSA: Component Acceptance Notice #5
Applications
Isolated Voltage Sensing in AC and Servo Motor Drives
Isolated DC-Bus Voltage Sensing in Solar Inverters,
Wind Turbine Inverters
Isolated Sensor Interfaces
Signal Isolation in Data Acquisition Systems
General Purpose Voltage Isolation
Description
The ACPL-C87B/C87A/C870 voltage sensors are optical
isolation ampli ers designed speci cally for voltage
sensing. Its 2 V input range and high 1 G input impe-
dance, makes it well suited for isolated voltage sensing
requirements in electronic power converters applications
including motor drives and renewable energy systems.
In a typical voltage sensing implementation, a resistive
voltage divider is used to scale the DC-link voltage to suit
the input range of the voltage sensor. A di erential output
voltage that is proportional to the input voltage is created
on the other side of the optical isolation barrier.
For general applications, the ACPL-C87A (±1% gain
tolerance) and the ACPL-C870 (±3% gain tolerance)
are recommended. For high precision requirements,
the ACPL-C87B (±0.5% gain tolerance) can be used. The
ACPL-C87B/C87A/C870 family operates from a single 5 V
supply and provides excellent linearity. An active-high
shutdown pin is available which reduces the IDD1 current
to only 15 A, making them suitable for battery-powered
and other power-sensitive applications.
The high common-mode transient immunity (15 kV/s)
of the ACPL-C87B/C87A/C870 provides the precision and
stability needed to accurately monitor DC-link voltage in
high noise environments. Combined with superior optical
coupling technology, the ACPL-C87B/C87A/C870 imple-
ments sigma-delta (Σ-∆) modulation, chopper stabilized
ampli ers, and di erential outputs to provide unequaled
isolation-mode noise rejection, low o set, high gain
accuracy and stability. This performance is delivered in a
compact, auto-insertable Stretched SO-8 (SSO-8) package
that meets worldwide regulatory safety standards.
Lead (Pb) Free
RoHS 6 fully
compliant
RoHS 6 fully compliant options available;
-xxxE denotes a lead-free product
