Overview
The DAC8775IRWFT is a quad-channel precision, fully integrated, 16-bit digital-to-analog converter (DAC) produced by Texas Instruments. It is designed to meet the requirements of industrial control applications with its adaptive power management and high precision output capabilities. The device supports both current and voltage output modes and features an integrated buck/boost converter to minimize power dissipation. It also includes a Highway Addressable Remote Transducer (HART) Signal Interface and an internal 5-V reference with low temperature drift.
Key Specifications
| Parameter | Specification |
|---|---|
| Output Current Range | 0 mA to 24 mA; 3.5 mA to 23.5 mA; 0 mA to 20 mA; 4 mA to 20 mA; ±24 mA |
| Output Voltage Range | 0 V to 5 V; 0 V to 10 V; ±5 V; ±10 V; 0 V to 6 V; 0 V to 12 V; ±6 V; ±12 V |
| Total Unadjusted Error (TUE) | ±0.1% FSR |
| Differential Non-Linearity (DNL) | ±1 LSB Max |
| Internal Reference | 5 V with 10 ppm/°C max temperature drift |
| Power Supply Range | +12 V to +36 V |
| Temperature Range | –40°C to +125°C |
| Package | VQFN (RWF) 72 pins |
Key Features
- Adaptive power management to minimize power dissipation
- Integrated buck/boost converters for current and voltage output stages
- Highway Addressable Remote Transducer (HART) Signal Interface
- Internal 5-V reference with low temperature drift
- Internal 5-V digital power supply output
- CRC/Frame Error Check and Watchdog Timer for system reliability
- Thermal Alarm and Open/Short Circuit detection
- Auto Learn Load Detection
- Register programmable slew rate for current output DAC
- Safe actions on alarm conditions
Applications
The DAC8775IRWFT is primarily designed for industrial control applications, including but not limited to:
- Process control systems
- Industrial automation
- Control systems requiring high precision analog outputs
- Systems integrating HART communication protocols
Q & A
- What is the output current range of the DAC8775IRWFT?
The output current range of the DAC8775IRWFT is 0 mA to 24 mA, 3.5 mA to 23.5 mA, 0 mA to 20 mA, 4 mA to 20 mA, and ±24 mA.
- What are the output voltage ranges supported by the DAC8775IRWFT?
The output voltage ranges supported are 0 V to 5 V, 0 V to 10 V, ±5 V, ±10 V, 0 V to 6 V, 0 V to 12 V, ±6 V, and ±12 V.
- What is the total unadjusted error (TUE) of the DAC8775IRWFT?
The total unadjusted error (TUE) is ±0.1% FSR.
- What is the differential non-linearity (DNL) of the DAC8775IRWFT?
The differential non-linearity (DNL) is ±1 LSB Max.
- What is the temperature range of the DAC8775IRWFT?
The temperature range is –40°C to +125°C.
- Does the DAC8775IRWFT support HART communication?
Yes, the DAC8775IRWFT supports Highway Addressable Remote Transducer (HART) Signal Interface.
- How does the adaptive power management work in the DAC8775IRWFT?
The adaptive power management circuit minimizes the power dissipation of the chip by regulating the supply voltage on the current output driver and generating a programmable supply voltage for the voltage output stage.
- What is the package type and pin count of the DAC8775IRWFT?
The package type is VQFN (RWF) with 72 pins.
- Does the DAC8775IRWFT have built-in error detection and alarm features?
Yes, it includes CRC/Frame Error Check, Watchdog Timer, Thermal Alarm, and Open/Short Circuit detection with an ALARM pin for system reliability.
- Can the DAC8775IRWFT operate with a single external power supply?
Yes, it can operate with a single external power supply of +12 V to +36 V using the integrated buck/boost converters or with external power supplies when the buck/boost converters are disabled.
