Overview
The DAC8831IBRGYTG4, produced by Texas Instruments, is a 16-bit, ultra-low power, voltage-output digital-to-analog converter (DAC). This device operates from a single 2.7 V to 5.5 V power supply and is designed for high accuracy and low power consumption. The DAC8831 is particularly notable for its bipolar output capability when used with an external buffer, making it versatile for various applications. It features a high-speed SPI serial interface, allowing for communication with DSPs or microprocessors at clock rates up to 50 MHz.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Resolution | 16 | bits | |||
| Supply Voltage | 2.7 | 5.5 | V | ||
| Integral Nonlinearity (INL) | ±0.5 | ±1 | LSB | ||
| Differential Nonlinearity (DNL) | ±0.5 | ±1 | LSB | ||
| Gain Error | TA = +25°C | ±0.25 | ±1 | LSB | |
| Zero Code Error | TA = +25°C | ±0.25 | ±1 | LSB | |
| Settling Time | To 1/2 LSB of FS, CL = 10 pF | 1 | μs | ||
| Slew Rate | CL = 10 pF | 25 | V/μs | ||
| Output Impedance | 6.25 | kΩ | |||
| Output Noise | TA = +25°C | 18 | nV/√Hz | ||
| Power Consumption | VDD = 3 V | 15 | μW |
Key Features
- 16-bit resolution with high accuracy (INL: ±1 LSB)
- Ultra-low power consumption: 15 µW at 3 V power supply
- Single-supply operation from 2.7 V to 5.5 V
- Bipolar output capability with external buffer (±VREF)
- Fast settling time: 1.0 µs to 1/2 LSB of full-scale output
- High-speed SPI serial interface up to 50 MHz
- Reset to zero-code after power-up
- Schmitt-trigger inputs for direct optocoupler interface
- Industry-standard pin configuration
- Low noise: 10 nV/√Hz
- Low glitch and digital feedthrough
Applications
- Portable equipment
- Automatic test equipment
- Industrial process control
- Data acquisition systems
- Optical networking
Q & A
- What is the resolution of the DAC8831?
The DAC8831 has a 16-bit resolution.
- What is the operating voltage range of the DAC8831?
The DAC8831 operates from a single 2.7 V to 5.5 V power supply.
- What is the typical power consumption of the DAC8831 at 3 V?
The typical power consumption is 15 µW at 3 V.
- Does the DAC8831 support bipolar output?
Yes, the DAC8831 supports bipolar output (±VREF) when used with an external buffer.
- What is the settling time of the DAC8831?
The settling time is 1.0 µs to 1/2 LSB of full-scale output.
- What is the maximum clock rate of the SPI interface?
The SPI interface can operate up to 50 MHz.
- Does the DAC8831 have Schmitt-trigger inputs?
Yes, the DAC8831 has Schmitt-trigger inputs for direct optocoupler interface.
- What are the typical applications of the DAC8831?
Typical applications include portable equipment, automatic test equipment, industrial process control, data acquisition systems, and optical networking.
- What is the output impedance of the DAC8831?
The output impedance is 6.25 kΩ.
- How much noise does the DAC8831 typically produce?
The typical output noise is 18 nV/√Hz at 25°C.
