Overview
The DAC8775IRWFR is a quad-channel, 16-bit programmable digital-to-analog converter (DAC) produced by Texas Instruments. It is designed to meet the requirements of industrial control applications, offering both current and voltage output capabilities. The device features adaptive power management, which minimizes power dissipation, and includes integrated buck/boost converters to regulate the supply voltage. Additionally, it supports a Highway Addressable Remote Transducer (HART) signal interface and has a wide operating temperature range of –40°C to +125°C.
Key Specifications
| Specification | Details |
|---|---|
| Package | VQFN (RWF), 72 pins |
| Operating Temperature Range | –40°C to +125°C |
| Resolution | 16-bit |
| 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 |
| Power Supply | Single wide power supply pin (12 V – 36 V) |
| Total Unadjusted Error (TUE) | ±0.1% FSR |
| Differential Non-Linearity (DNL) | ±1 LSB Max |
| Internal Reference | Internal 5-V reference (10 ppm/°C max) |
| Internal Digital Power Supply | Internal 5-V digital power supply output |
Key Features
- Adaptive Power Management: Minimizes power dissipation of the chip.
- Integrated Buck/Boost Converters: Regulate the supply voltage for current and voltage output stages.
- HART Signal Interface: Supports superimposing an external HART signal on the current output.
- Programmable Slew Rate: The slew rate of the current output DAC is register programmable.
- Thermal Alarm and Open/Short Circuit Detection: Enhances system reliability.
- Auto Learn Load Detection: Automatically detects and adjusts to load conditions.
- CRC/Frame Error Check and Watchdog Timer: Ensures communication integrity and system reliability.
- Safe Actions on Alarm Conditions: Allows for predefined actions in case of alarm conditions.
Applications
The DAC8775IRWFR is primarily designed for industrial control applications, including but not limited to:
- Process control systems
- Industrial automation
- Remote sensing and monitoring
- High-reliability industrial equipment
Q & A
- What is the resolution of the DAC8775IRWFR?
The DAC8775IRWFR has a 16-bit resolution.
- What are the output current and voltage ranges of the DAC8775IRWFR?
The output current ranges from 0 mA to 24 mA, and the output voltage ranges from 0 V to 10 V, ±5 V, ±10 V, and other specified ranges.
- What is the operating temperature range of the DAC8775IRWFR?
The operating temperature range is –40°C to +125°C..
- Does the DAC8775IRWFR support HART communication?
Yes, it supports superimposing an external HART signal on the current output..
- What is the purpose of the adaptive power management in the DAC8775IRWFR?
The adaptive power management minimizes the power dissipation of the chip..
- Can the DAC8775IRWFR 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..
- What safety features does the DAC8775IRWFR include?
The device includes thermal alarm, open/short circuit detection, and safe actions on alarm conditions..
- How does the DAC8775IRWFR handle communication integrity?
The device includes CRC/frame error check and a watchdog timer to ensure communication integrity..
- Can the slew rate of the current output be programmed?
Yes, the slew rate of the current output DAC is register programmable..
- What is the package type and pin count of the DAC8775IRWFR?
The package type is VQFN (RWF) with 72 pins..
