Precision Optically Isolated Voltage Sensor - AVAGO
Description
ACPL-C87B, ACPL-C87A, ACPL-C870 Precision Optically Isolated Voltage Sensor
Data Sheet
Lead (Pb) Free RoHS 6 fully compliant RoHS 6 fully compliant options available; -xxxE denotes a lead-free product
Description
The ACPL-C87B/C87A/C870 voltage sensors are optical isolation amplifiers designed specifically for voltage sensing.
Its 2 V input range and high 1 G input impedance, 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 differential 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 implements sigma-delta (-) modulation, chopper stabilized amplifiers, and differential outputs to provide unequaled isolation-mode noise rejection, low offset, 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.
Features
Advanced Sigma-Delta (-) Modulation Technology Unity Gain 1V/V, ±0.
5% High Gain A...
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