ACNT-H87A Datasheet | Broadcom

Description The ACNT-H87B/H87A/H870 voltage sensors are optical isolation amplifiers designed specifically 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 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 remended. For high precision requirements, the ACNT-H87B (±0.5% gain tolerance) can be used. The ACNT-H87B/H87A/H870 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 15 μA, making them suitable for battery-powered and other power-sensitive applications. The high mon-mode transient immunity (15 k V/μs) of the ACNT-H87B/H87A/H870 provides the precision and stability needed to accurately monitor DC-link voltage in high noise environments. bined with superior optical coupling technology, the ACNT-H87B/H87A/H870 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 pact, auto-insertable 15-mm 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 accuracy (ACNT-H87B) - 1-G 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-k Hz wide...