Overview
The DAC8831ICRGYT is a 16-bit, serial-input, voltage-output digital-to-analog converter (DAC) produced by Texas Instruments. This device is part of the DAC8831 series, known for its ultra-low power consumption and high precision. The DAC8831 operates on a single supply voltage ranging from 2.7 V to 5.5 V and is designed for applications requiring both unipolar and bipolar output voltages. It features a power-on reset function, ensuring the output is at a known state upon power-up, and it is reset to zero code or –VREF in bipolar mode. The device is available in SO-14 and QFN-14 packages, making it versatile for various design needs.
Key Specifications
| Parameter | Conditions | Min | Typ | 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 | ||
| 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 | ||
| Power-Supply Voltage | 2.7 | 5.5 | V | ||
| Power-Supply Current | VDD = 3 V | 5 | 20 | μA | |
| Temperature Range | –40 | +85 | °C |
Key Features
- 16-Bit Resolution: Provides high precision with 16-bit resolution.
- Ultra-Low Power Consumption: Typically consumes 5 μA, making it suitable for battery-powered devices.
- Single Supply Operation: Operates on a single supply voltage from 2.7 V to 5.5 V.
- Unipolar and Bipolar Output: The DAC8831 can be configured for both unipolar (0 V to +VREF) and bipolar (–VREF to +VREF) output voltages.
- Power-On Reset: Ensures the output is at a known state upon power-up, resetting to zero code or –VREF in bipolar mode.
- Serial Interface: Compatible with SPI, QSPI, Microwire, and TI DSP interfaces, operating at speeds up to 50 M-bits/sec.
- Kelvin Sense Connections: Included for reference and analog ground to enhance performance.
- Low Output Impedance: 6.25 kΩ output impedance allows for driving unbuffered loads of 60 kΩ.
Applications
- Portable Equipment: Ideal for battery-powered devices due to its ultra-low power consumption.
- Automatic Test Equipment: Used in precision measurement and testing applications.
- Industrial Process Control: Suitable for controlling and monitoring industrial processes.
- Data Acquisition Systems: Utilized in systems that require precise analog output from digital data.
- Optical Networking: Applied in optical communication systems for precise signal generation.
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 on a single supply voltage ranging from 2.7 V to 5.5 V.
- Can the DAC8831 produce both unipolar and bipolar output voltages?
Yes, the DAC8831 can be configured for both unipolar (0 V to +VREF) and bipolar (–VREF to +VREF) output voltages.
- What is the typical power consumption of the DAC8831?
The DAC8831 typically consumes 5 μA.
- What type of serial interface does the DAC8831 use?
The DAC8831 uses a serial interface compatible with SPI, QSPI, Microwire, and TI DSP interfaces.
- What is the settling time of the DAC8831?
The settling time of the DAC8831 is 1 μs to 1/2 LSB of full scale with a load capacitance of 10 pF.
- Does the DAC8831 have a power-on reset feature?
Yes, the DAC8831 has a power-on reset feature that ensures the output is at a known state upon power-up.
- 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.
- What are the package options for the DAC8831?
The DAC8831 is available in SO-14 and QFN-14 packages.
- How does the DAC8831 handle digital feedthrough?
The DAC8831 has a low digital feedthrough of 0.2 nV-s, ensuring minimal interference from digital inputs to the analog output.
