Sinrace Power Supply Technology (Shenzhen) Co., Ltd.
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| Optically isolated sigma-delta ADC to enhance accuracy and isolation |
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Avago Technologies announced the ACPL-C797 optically isolated sigma-delta ADC, the product can be used for motor control and current and voltage sensing of power generation applications procedural . ACPL-C797 can meet the growing market requirement for higher top operating temperature, 3.3V compatibility and better accuracy. ACPL-C797 is a major upgrade of Avago about a successful first-generation HCPL-7860 current sense amplifier , After upgrading, the features and specifications include operating temperature range of -40 to 105oC, 5 and 3.3V compatible digital output, lower offset voltage, ± 1% gain accuracy and ± 10% precision clock frequency. Through install the digital filter in FPGA, ASIC or DSP, the serial output is decoded 12-bit effective resolution. In addition, the new isolation amplifier has 78dB signal to noise ratio function, and use the conversion rate control output to lower the EMI to a minimum. The new extended type SO-8 (SSO-8) package can be seen, ACPL-C797 printed circuit board packaging is smaller than that of 30% traditional DIP-8. Even if usin micro-packaging, according to IEC / EN / DIN EN 60747-5-5, UL 1577 and CSA standards, ACPL-C797 can also meet 8mm creepage and clearance requirements to achieve 1140Vpeak working insulation voltage and 5 kVrms / safety of separation voltage requirements. ACPL-C797 also meet the requirements 0.55mm of the isolation distance (DTI) specification, many medical applications require this specification. SSO-8 package can be used with automated assembly equipment, unlike many Hall-effect current transducer, the device requires manual insertion during assembly. ACPL-C797 applications program is revolving around the power conversion and the current and voltage of motor drive systems to sense surrounding, such as AC and DC brushless motor drives, industrial power inverters, servo drives, robots, wind power and solar panel system. Other applications is included switching power supply signal isolation, industrial A / D conversion and isolation common sense. Important functions of ACPL-C797 isolation amplifier: ‧ ± 1% maximum gain error; ‧ High resolution: 12 digits; ‧ -40 to 105oC Operating temperature range; ‧ 3.3 and 5V compatible output; ‧ transformation rate control output for low EMI generation; ‧ enhanced optical isolation and global security certification; - according to UL 1577 requirements, power with 5kVrms / minute isolated; - according to IEC / EN / DIN EN 60747-5-5 and CSA requirements, working insulation voltage with 1140Vpk; ‧ 0.5mm Insulation Distance (DTI) specification in complied with requirements of medical applications; ‧ Compact automatic insertion extended SO-8 package; - pin is smaller than 30% of 8-pin DIP. ACPL-C797 offers the package which is compliant with RoHS-compliant SSO-8. After extended ACPL-C797 operating temperature range is from -40oC to 105oC. |
