AS8002-AB ams

austriamicrosystems AG is now ams AG The technical content of this austriamicrosystems application note 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 AS8002 AS8002-AB-1.0 Adapter Board Solar Photovoltaic Inverter Measurement IC OPERATION MANUAL with Fast Over Current Detection r General Description Power inverters in solar photovoltaic systems are often The 12 Bit ADC is preceded by low noise programmable connected directly to the electricity grid in order to inject gain amplifiers in order to accommodate different the created energy into the mains and act as an sensors. The ADC has three multiplexed inputs, offering electricity supplier. This energy must comply with certain one secondary channel in addition to the main voltage regulations that set the standard in terms of quality and and current. safety which requires of accurate measurements. The on-chip temperature sensor provides the inverter The AS8002 is a highly accurate measurement IC that designer the option of temperature compensation for any allows monitoring the generated energy with low cost of the measured parameters or functional blocks shunt resistors or other sensors for the current and provided, over the full operating temperature range of the resistor dividers for the voltage. This approach allows device. avoiding more expensive sensing devices while The on-chip voltage reference is connected to the ADC achieving the required accuracy for DC and AC and to REF. An external crystal oscillator is not required measurements of current and voltage as well as stability as a high accuracy internal oscillator clock is available. over the operating temperature range of the inverter. The independent over current interrupt detects a high The 12 bit ADC samples the voltage and current and current on the grid and allows the processor to open the provides their instantaneous values through an SPI switches without waiting for the ADC conversion. interface. The AS8002 Adapter Board The AS8002-AB-1.0 Adapter board allows you an easy-to-use evaluation of the essential functions of the AS8002. It is a system with built-in microcontroller, USB interface and a simple analogue frontend. The complete system is fully supplied by the PC and needs no additional external power supply. In combination with the AS8002-GUI PC software is it possible to evaluate all the basic functions. Revision 1.0, April 2010 Page 1 of 7 www.austriamicrosystems.com/AS5163 ams AG Technical content still valid