Texas Instruments DAC8771 Voltage & Current Output DAC
Texas Instruments DAC8771 Voltage and Current Output Digital-to-Analog Converter (DAC) is a single channel, precision, fully integrated 16-bit digital-to-analog converter (DAC) with adaptive power management. This device is designed to meet the requirements of industrial control applications. The adaptive power management circuit minimizes the chip's power dissipation when enabled. When programmed as a current output, the supply voltage on the current output driver is regulated between 4V and 32V based on continuous voltage feedback on the current output pin via a buck/boost converter. This circuit generates a programmable supply voltage for the voltage output stage (±15V) when programmed as a voltage output. DAC8771 contains an LDO to generate the digital supply (5V) from a single power supply pin, which is particularly helpful in isolated applications.DAC8771 is also implemented with a HART Signal Interface to superimpose an external HART signal on the current output. The slew rate of the current output DAC is register programmable. The devices can operate with a single external power supply of +12V to +36V using the integrated buck/boost converter or with external power supplies when the buck/boost converter is disabled.
Features
- Output current
- 0mA - 24mA; 3.5mA - 23.5mA
- 0mA - 20mA; 4mA - 20mA; ±24mA
- Output voltage (with/without 20% over-range)
- 0V - 5V; 0V - 10V; ±5V; ±10V
- 0V - 6V; 0V - 12V; ±6V; ±12V
- Adaptive power management
- Single wide power supply pin
- 12V - 36V with Buck-boost
- 12V - 33V without Buck-boost
- ±0.1% FSR Total Unadjusted Error (TUE)
- DNL: ±1LSB Max
- Internal 5V reference (10ppm/°C max)
- Internal 5V digital power supply output
- CRC/Frame error check, watchdog timer
- Thermal alarm, open/short circuit
- Safe actions on an alarm condition
- Auto learn feature
- –40°C to +125°C Wide temperature range
Applications
- 4mA to 20mA Current loops
- Analog output modules
- Programmable Logic Controllers (PLCs)
- Building automation
Block Diagram
Đã phát hành: 2018-07-11
| Đã cập nhật: 2022-11-17
