DESCRIPTION

The OSE7755 is an accurate electrical energy measurement IC intended for use in single phase distribution systems. It provides instantaneous and average real power based on line current and voltage. The part specifications surpass the accuracy requirements as stated in the IEC1036 standard. The only analog circuitry used in the OSE7755 is in the ADCs and reference circuit. All other signal processing (e.g., multiplication and filtering) is carried out in the digital domain. This approach provides superior stability and accuracy over extremes in environmental conditions and over time.

The current channel has a high gain mode for interfacing to low value shunt resistances without losing dynamic range. Gain calibration between channels is adjusted external to this device. The OSE7755, available in 24-lead DIP and SSOP packages, is pin to pin compatible with the ADE7755. It has the same functionalities as the ADE7755. Every piece will be strictly tested.

This chip has been bulk used in China and more than 30 other countries for more than 3 years. The first piece of Chinese digital 7755 ICs was from our factory. Sales in 2003 was 6000K pieces.

Other mark: AT7755, FM7755

FEATURES

• The High Frequency Output CF Is Intended for Calibration and Supplies Instantaneous Real Power
• The Logic Output REVP Can Be Used to Indicate a Potential Miswiring or Negative Power
• Direct Drive for Electromechanical Counters and Two Phase Stepper Motors (F1 and F2)
• A PGA in the Current Channel Allows the Use of Small Values of Shunt and Burden Resistance
• Proprietary ADCs and DSP Provide High Accuracy over Large Variations in Environmental Conditions and Time
• On-Chip Power Supply Monitoring
• On-Chip Creep Protection (No Load Threshold)
• On-Chip Reference 2.5 V _ 8% (30 ppm/_C Typical) with External Overdrive Capability
• Single 5 V Supply, Low Power (15 mW Typical)
• Low Cost CMOS Process