ACPL-C870-500E

The ACPL-C87B/C87A/C870 voltage sensors are optical isolation amplifiers designed specifically for voltage sensing. Its 2V input range and high 1-GΩ 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.

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

Key features

• 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 5V supply and provides excellent linearity.
• An active-high shutdown pin is available which reduces the IDD1 current to only 15A, making them suitable for battery-powered and other power-sensitive applications.
• The high common-mode transient immunity (|15 kV/ms|) 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 (Σ - Δ) modulation, chopper stabilized amplifiers, and differential outputs to provide unequaled isolation-mode noise rejection, low offset, high gain accuracy and stability.
• Advanced sigma-delta (Σ - Δ) modulation technology
• Unity gain 1 V/V, ±0.5% high gain accuracy (ACPL-C87B)
• 1-GΩ input impedence
• 0 to 2V nominal input range
• -35 ppm/°C low gain frift
• 21 μV/°C offset voltage drift
• 0.1% non-linearity max
• Active-high shutdown pin
• 100-kHz wide bandwidth
• 3V to 5.5V wide supply range for output side
• -40°C to +105°C operating temperature range
• 15 kV/μs common-mode transient immunity
• Compact, auto-insertable stretched SO-8 package
• Safety and regulatory approvals: – IEC/EN/DIN EN 60747-5-5: 1414 Vpeak working insulation voltage – UL 1577: 5000 Vrms/1 min double protection rating CSA: Component Acceptance Notice #5