ACPL-C87AT-500E

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1. Description

The Broadcom® ACPL-C87AT-500E isolation sensors utilize superior optical coupling technology, with sigma-delta (∑-Δ) analog-to-digital converter, chopper stabilized amplifiers, and a fully differential circuit topology to provide unequaled isolation-mode noise rejection, low offset, high gain accuracy and stability. ACPL-C87AT-500E (±1% gain tolerance) and ACPL-C87BT (±0.5% gain tolerance) are designed for high precision DC voltage sensing in electronic motor drives, DC/DC and AC/DC converter and battery monitoring system. The ACPL-C87AT-500E features high input impedance and operate with full span of analog input voltage up to 2.46V. The shutdown feature provides power saving and can be controlled from external source, such as microprocessor. The high common-mode transient immunity (15 kV/µs) of the ACPL-C87AT-500E maintains the precision and stability needed to accurately monitor DC rail voltage in high noise motor control environments. This galvanic safe isolation solution is delivered in a compact, surface mount stretched SO-8 (SSO-8) package that meets worldwide regulatory safety standards. Broadcom R2Coupler® isolation products provide the reinforced insulation and reliability needed for critical automotive and high temperature industrial applications.

2. Features

    1. Unity gain

    2. ± 0.5% (ACPL-C87BT) and ± 1% (ACPL-C87AT) gain tolerance @ 25°C

    3. –0.3 mV Input offset voltage

    4. 0.05% non linearity

    5. 25 ppm/°C gain drift vs. temperature

    6. 100 kHz bandwidth

    7. 0 to 2V nominal input range

    8. Qualified to AEC-Q100 Grade 1 test guidelines

    9. Operating temperature: –40°C to +125°C

  10. Shutdown feature (active high)

  11. 15 kV/µs common-mode rejection at VCM = 1 kV

  12. Working voltage, VIORM = 1414 Vpeak

  13. Compact, surface mount stretched SO8 package

3. Applications

    1. Automotive BMS battery pack voltage sensing

    2. Automotive DC/DC converter voltage sensing

    3. Automotive motor inverter DC bus voltage sensing

    4. Automotive AC/DC (charger) DC output voltage sensing

    5. Isolation interface for temperature sensing

    6. General-purpose voltage sensing and monitoring