Overview
The DAC8831ICDR is a single, 16-bit, serial-input, voltage-output digital-to-analog converter (DAC) produced by Texas Instruments. This device operates on a single supply voltage ranging from 2.7 V to 5.5 V and is known for its ultra-low power consumption, typically around 5 μA. The DAC8831 is designed to provide both unipolar and bipolar output voltages, making it versatile for various applications. It features a power-on reset function that sets the output to zero code, ensuring a known state at startup. The device is available in SO-14 and QFN-14 packages, with industry-standard pinouts.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Resolution | - | 16 | - | - | bits |
| Linearity Error | - | ±0.5 | ±1 | ±2 | LSB |
| Differential Linearity Error | - | ±0.5 | ±1 | ±5 | LSB |
| Gain Error | - | ±1 | ±2 | ±7 | LSB |
| Zero Code Error | - | ±0.05 | ±0.25 | ±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
- Ultra-Low Power Consumption: Typically 5 μA, making it suitable for battery-powered devices.
- Single Supply Operation: Operates from 2.7 V to 5.5 V.
- 16-Bit Resolution: Provides high precision with 16-bit resolution.
- Unipolar and Bipolar Output: The DAC8831 can be configured for both unipolar (0 V to +VREF) and bipolar (±VREF) output voltages with the aid of an external operational amplifier.
- Power-On Reset: Resets to zero code after power-up, ensuring a known state at startup.
- Serial Interface: Compatible with SPI, QSPI, Microwire, and TI DSP interfaces, operating up to 50 M-bits/sec.
- Low Output Impedance: 6.25 kΩ, suitable for driving unbuffered loads of 60 kΩ.
- Kelvin Sense Connections: Provided for the reference and analog ground inputs on the DAC8831.
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 control systems requiring high precision and reliability.
- Data Acquisition Systems: Used in systems that require accurate analog output from digital data.
- Optical Networking: Can be used 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 from 2.7 V to 5.5 V.
- Can the DAC8831 provide bipolar output?
Yes, the DAC8831 can be configured to provide bipolar output (±VREF) with the aid of an external operational amplifier.
- What is the typical power consumption of the DAC8831?
The typical power consumption is around 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 is typically 1 μs to 1/2 LSB of full scale with a 10 pF load capacitance.
- Does the DAC8831 have a power-on reset feature?
Yes, the DAC8831 resets to zero code after power-up.
- What is the output impedance of the DAC8831?
The output impedance is typically 6.25 kΩ.
- What are the package options for the DAC8831?
The DAC8831 is available in SO-14 and QFN-14 packages.
- What are some common applications of the DAC8831?
Common applications include portable equipment, automatic test equipment, industrial process control, data acquisition systems, and optical networking.
