Overview
The DAC8831ICRGYR, 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 speeds up to 50 MHz.
Key Specifications
| Parameter | Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Resolution | 16 | bits | |||
| Linearity error | ±0.5 | ±2 | LSB | ||
| Differential linearity error | ±0.5 | ±1 | LSB | ||
| Gain error | TA = +25°C | ±1 | ±5 | LSB | |
| Gain drift | TA = –40°C to +85°C | ±0.1 | ±0.25 | ppm/°C | |
| Zero code error | TA = –40°C to +85°C | ±2 | LSB | ||
| Zero code drift | ±0.05 | ppm/°C | |||
| Output impedance | 6.25 | kΩ | |||
| Settling time | To 1/2 LSB of FS, CL = 10 pF | 1 | μs | ||
| Slew rate | CL = 10 pF | 25 | V/μs | ||
| Output noise | TA = +25°C | 18 | nV/√Hz | ||
| Power-supply rejection | VDD varies ±10% | ±1 | LSB | ||
| Operating temperature range | -40 | 85 | °C |
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: 2.7 V to 5.5 V
- Fast settling time: 1.0 µs to 1/2 LSB of full-scale output
- High-speed SPI serial interface up to 50 MHz
- Low noise: 18 nV/√Hz at 25°C
- Reset to zero-code after power-up
- Schmitt-trigger inputs for direct optocoupler interface
- Industry-standard pin configuration
- Bipolar output capability with external buffer (DAC8831)
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.
- How much power does the DAC8831 consume at 3 V?
The DAC8831 consumes 15 µW at 3 V power supply.
- 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 speed of the SPI interface?
The SPI interface can operate up to 50 MHz.
- Does the DAC8831 have bipolar output capability?
Yes, the DAC8831 provides bipolar output (±VREF) when used with an external buffer.
- What is the output impedance of the DAC8831?
The output impedance is 6.25 kΩ.
- What is the slew rate of the DAC8831?
The slew rate is 25 V/μs.
- What are the typical applications of the DAC8831?
The DAC8831 is used in portable equipment, automatic test equipment, industrial process control, data acquisition systems, and optical networking.
- Does the DAC8831 have Schmitt-trigger inputs?
Yes, the DAC8831 has Schmitt-trigger inputs for direct optocoupler interface.
