ACPL-C870-500E

The ACPL-C870 voltage sensors is opticalisolation amplifiers designed specifically for voltagesensing. Its 2 V input range and high 1 GO input impedance,makes it well suited for isolated voltage sensingrequirements in electronic power converters applicationsincluding motor drives and renewable energy systems.In a typical voltage sensing implementation, a resistivevoltage divider is used to scale the DC-link voltage to suitthe input range of the voltage sensor. A differential outputvoltage that is proportional to the input voltage is createdon the other side of the optical isolation barrier.For general applications, the ACPL-C87A (±1% gaintolerance) and the ACPL-C870 (±3% gain tolerance)are recommended. For high precision requirements,the ACPL-C87B (±0.5% gain tolerance) can be used. TheACPL-C87B/C87A/C870 family operates from a single 5 Vsupply and provides excellent linearity. An active-highshutdown pin is available which reduces the IDD1 currentto only 15 mA, making them suitable for battery-poweredand other power-sensitive applications.The high common-mode transient immunity (15 kV/µs)of the ACPL-C87B/C87A/C870 provides the precision andstability needed to accurately monitor DC-link voltage inhigh noise environments. Combined with superior opticalcoupling technology, the ACPL-C87B/C87A/C870 implementssigma-delta (S-D) modulation, chopper stabilizedamplifiers, and differential outputs to provide unequaledisolation-mode noise rejection, low offset, high gainaccuracy and stability. This performance is delivered in acompact, auto-insertable Stretched SO-8 (SSO-8) packagethat meets worldwide regulatory safety standards.

• Advanced Sigma-Delta (S-D) Modulation Technology
• Unity Gain 1 V/V, ±0.5% High Gain Accuracy (ACPL-C87B)
• 1 GW Input Impedence
• 0 to 2 V Nominal Input Range
• -35 ppm/°C Low Gain Drift
• 21mV /°C Offset 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/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