| ADI AD5751 I/V输出驱动方案 |
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| 作者：未知 来源：ADI 点击数：118 更新时间：2008-5-16 |
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The AD5751 targets applications in PLC and industrial process control. The analog input to the AD5751 is provided from a low voltage, single supply digital-to-analog converter and is internally conditioned to provide the desired output current/voltage range.
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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