Date: 14/05/2010

Precision isolation amplifiers for industrial and renewable energy applications

Avago has announced three miniature precision isolation amplifiers based on sigma-delta analog-to-digital converters and chopper stabilized amplifiers, thus they feature high gain accuracy, low temperature drift, 3.3 V/5 V output supply operation and a wide -40 to +105°C operating temperature range. These are delivered in a stretched SO-8 package that has a footprint 30% smaller than the standard DIP-8 package. When mounted on a PCB, it occupies a space that is a fraction of that for a traditional Hall Effect or transformer based isolation amplifier.

The series of amplifiers have a gain accuracy of ±0.5% (ACPL-C79B), ±1% (ACPL-C79A), and ±3% (ACPL-C790), normalized gain drift is 50 ppm/°C, with a 200 kHz bandwidth and 1.6 µs response time. The ACPL-C79x captures transients during short circuit and overload conditions. It operates from a single 5 V supply, the isolation amplifier series features a nonlinearity of 0.05% and a SNR of 60 dB. The ACPL-C79x high common-mode transient immunity of 15 kV/µs, therefore aids in monitoring the current in high noise motor control environments.

Pending safety and regulatory approvals include:

- IEC/EN/DIN EN 60747-5-5: 1140 Vpeak working insulation voltage
- UL 1577: 5000 Vrms/1 minute double protection rating
- CSA: Component Acceptance Notice #5

Package: compact 8-pin stretched SO-8

Price:
ACPL-C79B priced at US$6.25 each in 10,000 piece quantities.
ACPL-C79A priced at US$6.25 each in 10,000 piece quantities.
ACPL-C790 priced at US$6.25 each in 10,000 piece quantities.

Availability: Now

To know more visit: www.avagotech.com