MAXIM INTEGRATED PRODUCTS 71M6515H-IGT/F 芯片, 特殊功能
The is an energy meter IC in 64 pin LQFP package. This high accuracy analogue front end AFE IC provides measurements for three quadrant 3-phase metering. The combination of 21bit sigma-delta A/D converter with six input analogue front end, thermally compensated high precision reference and compute engine results in high accuracy and wide dynamic range. The Single Converter Technology reduces cross talk and cost. This IC also provides RTC and battery backup for time of use TOU metering. The host processor communicates with 71M6515H through UART interface using programmable IRQZ interrupt. The device calculates and accumulates meter measurements for each accumulation interval. A high speed synchronous serial port SSI is provided to facilitate high end metering. Integrated rectifying functions on the battery backup circuit enable minimal external component usage and minimum back-up current. The eight multipurpose pins are provided for control of peripherals.
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- Supply voltage range from 3V to 3.6V normal operation
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- Operating temperature range from -40°C to 85°C
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- Less than 0.1% Wh accuracy over 2000:1 range, exceeds IEC 62053/ANSIC 12.20 specifications
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- Power consumption of 30mW at 3.3V and up to 10ppm/°C precision ultra stable voltage reference
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- 5MHz or 10MHz selectable high speed synchronous serial output for DSP interface
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- Six sensor inputs referenced to V3P3, real time clock with temperature compensation
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- Compatible with CTs, resistive shunts and rogowski coil sensors
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- Digital temperature compensation and sag detection
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- Powers real time clock during power supply outage
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- Compatible with Li-ion, NiCd or super capacitor and battery backup current of 2µA at 25°C
