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Austriamicrosystems公司的 AS8002是太陽能電源逆變器高精度測量IC. 太陽能光伏系統(tǒng)(PV)中的電源逆變器常常直接連接到國家電網(wǎng),注入電能,這些電能必須符合某種規(guī)范.AS8002中的12位100kSPS ADC能高精度地測量所監(jiān)管的電壓和電流,可編程增益放大器適合不同類型的傳感器,片內(nèi)的基準電壓有很低的溫度系數(shù)(10ppm/K). AS8002適用于PV逆變器電網(wǎng)監(jiān)測,風能逆變器電網(wǎng)監(jiān)測,隔離電壓檢測和UPS.本文介紹了AS8002主要特性,方框圖, 典型應用電路圖以及AS8002電源逆變器適配器板主要特性與電路圖.
Power inverters in solar photovoltaic systems are often connected 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 with certain regulations that set the standard in terms of quality and safety which requires of accurate measurements.
The AS8002 is a highly accurate measurement IC that allows monitoring the generated energy with low cost shunt resistors or other sensors for the current and resistor dividers for the voltage.
This approach allows avoiding more expensive sensing devices while achieving the required accuracy for DC and AC measurements of current and voltage, as well as stability over the operating temperature range of the inverter.
The 12-bit ADC samples the voltage and current and provides their instantaneous values through an SPI interface.
The 12-bit ADC is preceded by low noise programmable gain amplifiers in order to accommodate different sensors.
The ADC has three multiplexed inputs, offering one secondary channel in addition to the main voltage and current.
The on-chip temperature sensor provides the inverter designer the option of temperature compensation for any of the measured parameters or functional blocks provided, over the full operating temperature range of the device.
The on-chip voltage reference is connected to the ADC and to REF. 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.
AS8002主要特性:
12-Bit 100 kSPS ADCs for accurate voltage and current measurement
Programmable gain amplifiers to accommodate for different sensors
Three multiplexed inputs to the 12-Bit ADC for secondary measurements that require high accuracy and fast sampling rates
On chip temperature sensor connected to one of the inputs of the multiplexer
On-chip voltage reference with small temperature coefficient (10ppm/K typ). This reference is available at the pin REF.
Low power on chip oscillator
SPI compatible interface
Internal registers for easy offset and gain compensation
Interrupt alerts (including Under Voltage Lock-Out and Over Temperature)
Independent programmable over current interrupt
AS8002應用:
The AS8002 is suitable for PV inverter grid monitoring, Wind inverter grid monitoring, Isolated voltage sensing, Uninterruptible Power supplies and Power conditioners.
圖1.AS8002方框圖
圖2.AS8002典型應用電路圖
AS8002電源逆變器適配器板
Power inverters in solar photovoltaic systems are often connected 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 with certain regulations that set the standard in terms of quality and safety which requires of accurate measurements.
The AS8002 is a highly accurate measurement IC that allows monitoring the generated energy with low cost shunt resistors or other sensors for the current and resistor dividers for the voltage. This approach allows avoiding more expensive sensing devices while achieving the required accuracy for DC and AC measurements of current and voltage as well as stability over the operating temperature range of the inverter.
The 12 bit ADC samples the voltage and current and provides their instantaneous values through an SPI interface.
The 12 Bit ADC is preceded by low noise programmable gain amplifiers in order to accommodate different sensors. The ADC has three multiplexed inputs, offering one secondary channel in addition to the main voltage and current.
The on-chip temperature sensor provides the inverter designer the option of temperature compensation for any of the measured parameters or functional blocks provided, over the full operating temperature range of the device.
The on-chip voltage reference is connected to the ADC and to REF. 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.
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.
圖3.AS8002電源逆變器適配器板外形圖
圖4.AS8002適配器板電路圖
Power inverters in solar photovoltaic systems are often connected 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 with certain regulations that set the standard in terms of quality and safety which requires of accurate measurements.
The AS8002 is a highly accurate measurement IC that allows monitoring the generated energy with low cost shunt resistors or other sensors for the current and resistor dividers for the voltage.
This approach allows avoiding more expensive sensing devices while achieving the required accuracy for DC and AC measurements of current and voltage, as well as stability over the operating temperature range of the inverter.
The 12-bit ADC samples the voltage and current and provides their instantaneous values through an SPI interface.
The 12-bit ADC is preceded by low noise programmable gain amplifiers in order to accommodate different sensors.
The ADC has three multiplexed inputs, offering one secondary channel in addition to the main voltage and current.
The on-chip temperature sensor provides the inverter designer the option of temperature compensation for any of the measured parameters or functional blocks provided, over the full operating temperature range of the device.
The on-chip voltage reference is connected to the ADC and to REF. 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.
AS8002主要特性:
12-Bit 100 kSPS ADCs for accurate voltage and current measurement
Programmable gain amplifiers to accommodate for different sensors
Three multiplexed inputs to the 12-Bit ADC for secondary measurements that require high accuracy and fast sampling rates
On chip temperature sensor connected to one of the inputs of the multiplexer
On-chip voltage reference with small temperature coefficient (10ppm/K typ). This reference is available at the pin REF.
Low power on chip oscillator
SPI compatible interface
Internal registers for easy offset and gain compensation
Interrupt alerts (including Under Voltage Lock-Out and Over Temperature)
Independent programmable over current interrupt
AS8002應用:
The AS8002 is suitable for PV inverter grid monitoring, Wind inverter grid monitoring, Isolated voltage sensing, Uninterruptible Power supplies and Power conditioners.
圖1.AS8002方框圖
圖2.AS8002典型應用電路圖
AS8002電源逆變器適配器板
Power inverters in solar photovoltaic systems are often connected 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 with certain regulations that set the standard in terms of quality and safety which requires of accurate measurements.
The AS8002 is a highly accurate measurement IC that allows monitoring the generated energy with low cost shunt resistors or other sensors for the current and resistor dividers for the voltage. This approach allows avoiding more expensive sensing devices while achieving the required accuracy for DC and AC measurements of current and voltage as well as stability over the operating temperature range of the inverter.
The 12 bit ADC samples the voltage and current and provides their instantaneous values through an SPI interface.
The 12 Bit ADC is preceded by low noise programmable gain amplifiers in order to accommodate different sensors. The ADC has three multiplexed inputs, offering one secondary channel in addition to the main voltage and current.
The on-chip temperature sensor provides the inverter designer the option of temperature compensation for any of the measured parameters or functional blocks provided, over the full operating temperature range of the device.
The on-chip voltage reference is connected to the ADC and to REF. 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.
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.
圖3.AS8002電源逆變器適配器板外形圖
圖4.AS8002適配器板電路圖
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