AS8002-AQFP

austriamicrosystems AG is now ams AG The technical content of this austriamicrosystems datasheet is still valid. Contact information: Headquarters: ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 e-Mail: ams sales ams.com Please visit our website at www.ams.com Data Sheet AS8002 Solar Photovoltaic Inverter Measurement IC with Fast Over Current Detection 1 General Description 2 Key Features 12-Bit 100 kSPS ADCs for accurate voltage and current Power inverters in solar photovoltaic systems are often connected measurement directly to the electricity grid in order to inject the created energy into the mains and act as an electricity supplier. This energy must comply Programmable gain amplifiers to accommodate for different with certain regulations that set the standard in terms of quality and sensors safety which requires of accurate measurements. Three multiplexed inputs to the 12-Bit ADC for secondary The AS8002 is a highly accurate measurement IC that allows measurements that require high accuracy and fast sampling monitoring the generated energy with low cost shunt resistors or rates other sensors for the current and resistor dividers for the voltage. On chip temperature sensor connected to one of the inputs of This approach allows avoiding more expensive sensing devices the multiplexer while achieving the required accuracy for DC and AC measurements On-chip voltage reference with small temperature coefficient of current and voltage, as well as stability over the operating (10ppm/K typ). This reference is available at the pin REF. temperature range of the inverter. Low power on chip oscillator The 12-bit ADC samples the voltage and current and provides their instantaneous values through an SPI interface. SPI compatible interface The 12-bit ADC is preceded by low noise programmable gain Internal registers for easy offset and gain compensation amplifiers in order to accommodate different sensors. Interrupt alerts (including Under Voltage Lock-Out and Over The ADC has three multiplexed inputs, offering one secondary Temperature) channel in addition to the main voltage and current. Independent programmable over current interrupt The on-chip temperature sensor provides the inverter designer the option of temperature compensation for any of the measured 3 Applications parameters or functional blocks provided, over the full operating temperature range of the device. The AS8002 is suitable for PV inverter grid monitoring, Wind inverter The on-chip voltage reference is connected to the ADC and to REF. grid monitoring, Isolated voltage sensing, Uninterruptible Power supplies and Power conditioners. An external crystal oscillator is not required as a high accuracy internal oscillator clock is available. The independent over current interrupt detects a high current on the grid and allows the processor to open the switches without waiting for the ADC conversion. www.austriamicrosystems.com/AS8002 Revision 1.1 1 - 24 ams AG Technical content still valid