New Product Introduction

Broadcom ACNT-H87B/H87A/H870 voltage sensor

The ACNT-H87B/H87A/H870 voltage sensors are optical isolation amplifiers designed specifically for voltage sensing.

Broadcom ACNT-H87B/H87A/H870 product image

The ACNT-H87B/H87A/H870 voltage sensors are optical isolation amplifiers designed specifically for voltage sensing.

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 ACNT-H87A (±1% gain tolerance) and the ACNT-H870 (±3% gain tolerance) are recommended, for high precision requirements, the ACNT-H87B (±0.5% gain tolerance).

 

Key features

  • Excellent linearity
  • Ideal for battery-powered and power-sensitive applications
  • 2-V input range and high 1-GΩ input impedance
  • Well suited for isolated voltage sensing requirements

 

Additional features

  • Advanced sigma-delta (Σ–Δ) modulation technology
  • Unity gain 1V/V, ±0.5% high gain accuracy (ACNT-H87B)
  • 1-GΩ input impedence
  • 0 to 2V nominal input range
  • 35 ppm/°C low gain drift
  • 21 μV /°C offset voltage drift
  • 0.1% non-linearity maximum
  • Active-high shutdown pin
  • 100-kHz wide bandwidth
  • 3-V to 5.5-V wide supply range for output side
  • Operation from a single 5V supply
  • –40°C to +110°C operating temperature range
  • 15 kV/μs common-mode transient immunity
  • Compact, auto-insertable 15-mm Stretched SO-8 package
  • Active-high shutdown pin is available, reducing the IDD1 current to only 15 μA
  • Safety and regulatory approvals:
  • IEC/EN/DIN EN 60747-5-5: 2262 Vpeak working
  • insulation voltage
  • UL 1577: 7500 Vrms/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
  • Isolated sensor interfaces
  • Signal isolation in data acquisition systems
  • General-purpose voltage isolation
  • Motor drives and renewable energy systems
  • Solar inverters, wind turbine inverters

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