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DAC7750 Datasheet

Part NameDescriptionManufacturer
DAC7750 Single-Channel, 12- and 16-Bit Programmable Current Output Digital-to-Analog Converters for 4-mA to 20-mA Current Loop Applications TI
Texas Instruments TI
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Description
The DAC7750 and DAC8750 are low-cost, precision, fully-integrated 12-bit and 16-bit digital-to-analog converters (DACs) designed to meet the requirements of industrial process-control applications. These devices can be programmed as a current output with a range of 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA. The DAC7750 and DAC8750 include reliability features such as CRC error checking on the serial peripheral interface (SPI™) frame, a watchdog timer, an open circuit, compliance voltage, and thermal alarm. In addition, the output current can be monitored by accessing an internal precision resistor.
These devices include a power-on-reset function to ensure that the device powers up in a known state (IOUT is disabled and in a Hi-Z state). The CLR terminal sets the current output to the low end of the range if the output is enabled. Program the zero and gain registers to digitally calibrate the device in the end system. The output slew rate is also programmable by register. These devices can superimpose an external HART® signal on the current output, and can operate with a 10-V to 36-V supply.
All versions are available in both 40-pin VQFN and 24-pin TSSOP packages.

Features
• Current Output Options:
   – 0 mA to 24 mA
   – 4 mA to 20 mA
   – 0 mA to 20 mA
• ±0.1% FSR Typical Total Unadjusted Error (TUE)
• DNL: ±1 LSB Maximum
• Max Loop Compliance Voltage: AVDD – 2 V
• Internal 5-V Reference: 10 ppm/°C (Maximum)
• Internal 4.6-V Power-Supply Output
• CRC Frame Error Check
• Watchdog Timer
• Thermal Alarm
• Open Circuit Alarm
• Terminals to Monitor Output Current
• On-Chip Fault Alarm
• User-Calibration for Offset and Gain
• Wide Temperature Range: –40°C to 125°C
• 6-mm × 6-mm 40-Pin VQFN and 24-Pin HTSSOP
   Packages

Applications
• 4-mA to 20-mA Current Loops
• Analog Output Modules
• Building Automation
• Environment Monitoring
• Programmable Logic Controllers (PLCs)
• Field Sensors and Process Transmitters

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