The DAC8750 is a low cost, high precision, fully integrated, 16-bit digital-to-analog converter (DAC). This section introduces the DAC8750 features, application range, reference design circuitry, and circuit analysis to help you reduce design time.
DAC8750 features:
The DAC8750 can be set to a current output ranging from 4mA to 20mA, 0mA to 20mA, or 0mA to 24mA. The DAC8750 includes reliability features such as CRC error checking for Serial Peripheral Interface (SPI) data frames, a watchdog timer, an open circuit, compliance voltage, and overtemperature alarm. In addition, the output current can be monitored by accessing an internal precision resistor. A power-on reset function is also included to ensure that the device is powered up in a known state (IOUT is disabled and in a high impedance state).
- Current Output Options: 0mA to 24mA, 4mA to 20mA, 0mA to 20mA
- ±0.1% full scale range (FSR) Typical overall unadjusted error (TUE)
- Differential Nonlinearity (DNL): ±1 least significant bit (LSB) maximum
- Internal 5V reference (10ppm/°C, maximum), internal 4.6V power supply output, maximum loop compliance voltage: AVDD - 2V
- Cyclic Redundancy Check (CRC) Frame Error Check
- Watchdog timer, overheat alarm, open alarm, on-chip fault alarm
- Terminal for monitoring output current
Typical applications for the DAC8750 include: 4mA to 20mA current loops, analog output modules, building automation, environmental monitoring, programmable logic controllers (PLCs), field sensors, and process transmitters
Internal block diagram of DAC8750:
DAC8750 reference design circuit:
DAC8750 application circuit analysis: Analog I/O modules in PLC- and DCS-based systems interface to sensors, actuators, and other field instruments. These modules must deliver high performance while also passing stringent EMI and EMC certification tests. Figure up shows a circuit The singularity of the digital lines to communicate to the main controller The isolators can be driven by the internally-generated supply (DVDD) from the DACx750 to save components and cost. The DACx750 supplies up to 10 mA, which meets the supply requirements of the two isolators running at up to 10 Mbps. Savings are possible if noncritical signals such as CLR and ALARM are tied to GND or left unconnected.
DAC8750 Chinese information: click to download
Popular application circuits with schematics and source code can be found at:
Mppt Solar Charger Controller,Wind Solar Controller,Mppt Controller,Micro Solar Charge Controller
GuangZhou HanFong New Energy Technology Co. , Ltd. , https://www.gzinverter.com