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| ADI AD5751 I/V输出驱动方案 | |||||
作者：佚名 文章来源：Internet 点击数： 更新时间：2008-5-16  |
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The output current range is programmable across three current ranges - 4–20mA, 0–20mA or 0–24mA. Voltage output is provided from a separate pin that can be configured to provide 0V to 5V, 0V to 10V and 0-40V output ranges. An over-range of 10% is available on the voltage ranges. Analog outputs are short and open circuit protected and can drive capacitive loads of 1uF and inductive loads of 0.1H. The device is specified to operate with a power supply range from 12 V to 60 V. Output loop compliance is 0 V to AVDD –2.5 V. The flexible serial interface is SPI and MICROWIRE compatible and can be operated in 3-wire mode to minimize the digital isolation required in isolated applications. The interface also features an optional PEC error checking feature using CRC-8 error checking, useful in industrial environments where data communication corruption can occur. The device also includes a power-on-reset function ensuring that the device powers up in a known state and an asynchronous CLEAR pin which sets the outputs to zero-scale / mid-scale voltage output or the low end of the selected current range. A HW SELECT pin is used to configure the part for hardware or software mode on power up. The total output error is typically ±0.1% in both current mode and voltage mode. FEATURES Current Output Ranges: 4–20mA, 0–20mA or 0–24mA, 0.1% Total Unadjusted Error (TUE) 5ppm/°C Output Drift 60V MAX IOUT Compliance Voltage Voltage Output Ranges: 0-5V, 0-10V, 0-40v 20% over-range 0.1% Total Unadjusted Error (TUE) Flexible Serial Digital Interface On-Chip Output Fault Detection PEC Error Checking Asynchronous CLEAR Function Power Supply Range AVDD : = +12V to +60V (MAX) Output Loop Compliance to AVDD – 2.5 V Temperature Range: -40°C to +105°C LFCSP Packages APPLICATIONS Process Control Actuator Control PLC   方框图  Current Output Configuration  Voltage Output http://www.analog.com/UploadedFiles/Data_Sheets/AD5751.pdf |
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