Overview
The DAC8771RGZR from Texas Instruments is a single-channel, 16-bit precision digital-to-analog converter (DAC) designed to meet the requirements of industrial control applications. It features adaptive power management, which minimizes power dissipation, and supports both current and voltage output configurations. The device includes an integrated buck-boost converter, allowing it to operate with a single external power supply of +12 V to +36 V. It also includes a HART Signal Interface for superimposing external HART signals on the current output and has a wide temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Value |
|---|---|
| Output Current | 0 mA - 24 mA, 3.5 mA - 23.5 mA, 0 mA - 20 mA, 4 mA - 20 mA, ±24 mA |
| Output Voltage | 0 V - 5 V, 0 V - 10 V, ±5 V, ±10 V, 0 V - 6 V, 0 V - 12 V, ±6 V, ±12 V |
| Power Supply | 12 V - 36 V with Buck-Boost, 12 V - 33 V without Buck-Boost |
| 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 |
| Temperature Range | –40°C to +125°C |
| Package | VQFN (48 pins) |
| Body Size | 7.00 mm x 7.00 mm |
Key Features
- Adaptive power management to minimize power dissipation
- Single wide power supply pin with integrated buck-boost converter
- Configurable output ranges for both current and voltage
- HART Signal Interface for superimposing external HART signals on the current output
- Internal 5-V reference and digital power supply output
- CRC/Frame Error Check, Watchdog Timer, Thermal Alarm, and Open/Short circuit detection
- Safe actions on alarm conditions and Auto Learn Feature
- Register programmable slew rate for current output
Applications
- 4 mA to 20 mA Current Loops
- Analog Output Modules
- Programmable Logic Controllers (PLCs)
- Building Automation
- Industrial control applications
Q & A
- What is the output current range of the DAC8771RGZR?
The output current range is 0 mA - 24 mA, 3.5 mA - 23.5 mA, 0 mA - 20 mA, 4 mA - 20 mA, and ±24 mA. - What are the output voltage ranges supported by the DAC8771RGZR?
The output voltage ranges are 0 V - 5 V, 0 V - 10 V, ±5 V, ±10 V, 0 V - 6 V, 0 V - 12 V, ±6 V, and ±12 V. - What is the power supply range for the DAC8771RGZR?
The device can operate with a single external power supply of +12 V to +36 V using the integrated buck-boost converter or with external power supplies when the buck-boost converter is disabled. - What is the total unadjusted error (TUE) of the DAC8771RGZR?
The TUE is ±0.1% FSR. - Does the DAC8771RGZR have an internal reference?
Yes, it has an internal 5-V reference with a temperature coefficient of 10 ppm/°C max. - What is the temperature range of the DAC8771RGZR?
The temperature range is –40°C to +125°C. - Does the DAC8771RGZR support HART signals?
Yes, it includes a HART Signal Interface to superimpose external HART signals on the current output. - What are some of the safety features of the DAC8771RGZR?
The device includes CRC/Frame Error Check, Watchdog Timer, Thermal Alarm, Open/Short circuit detection, and safe actions on alarm conditions. - Can the slew rate of the current output be programmed?
Yes, the slew rate of the current output is register programmable. - What package type and size does the DAC8771RGZR come in?
The device comes in a VQFN package with 48 pins and a body size of 7.00 mm x 7.00 mm.
