Overview
The DAC8831MCDEP, produced by Texas Instruments, is a 16-bit, single-channel, serial-input, voltage-output digital-to-analog converter (DAC). This device operates from a single power supply ranging from 2.7 V to 5.5 V and is designed for ultra-low power consumption, typically around 5 μA. The DAC8831 features an SPI serial interface for data input and includes a power-on reset function to ensure a known power-up state. It is reset to zero code in unipolar mode and to –VREF in bipolar mode. The device is particularly suited for applications requiring high linearity, low glitch, and fast settling times over a wide temperature range of –55°C to 125°C.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Power-supply voltage (VDD) | 2.7 | 5.5 | V | ||
| Power-supply current (IDD) | VDD = 3 V | 5 | 20 | μA | |
| Power-supply current (IDD) | VDD = 5 V | 5 | 20 | μA | |
| Reference input voltage range | Unipolar mode | 1.25 | VDD | V | |
| Reference input impedance | 7.5 | kΩ | |||
| Signal-to-noise ratio (SNR) | Code = 0000h | 75 | 92 | dB | |
| Input low voltage (VIL) | VDD = 2.7 V | 0.6 | V | ||
| Input high voltage (VIH) | VDD = 2.7 V | 2.1 | V | ||
| Temperature range | –40 | 125 | °C |
Key Features
- Ultra-Low Power Consumption: Typically 5 μA, making it suitable for battery-powered devices and low-power applications.
- High Resolution: 16-bit resolution for precise analog output.
- Wide Operating Voltage Range: Operates from a single supply of 2.7 V to 5.5 V.
- Fast Settling Time: Ensures quick transition to the desired output voltage.
- Low Glitch and Noise: Minimizes errors and provides a clean analog output.
- SPI Serial Interface: Allows for easy communication with microcontrollers and other digital systems.
- Power-On Reset: Ensures a known power-up state, resetting to zero code or –VREF in bipolar mode.
- Kelvin Sense Connections: Available on the DAC8831 for precise reference and analog ground sensing.
Applications
- Portable Equipment: Suitable for battery-powered devices due to its low power consumption.
- Automatic Test Equipment: Used in test and measurement applications requiring high precision and low noise.
- Industrial Process Control: Ideal for control systems that need accurate and reliable analog outputs.
- Data Acquisition Systems: Used in systems that require high-resolution analog outputs for data conversion.
- 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 a single supply of 2.7 V to 5.5 V.
- How much power does the DAC8831 typically consume?
The DAC8831 typically consumes around 5 μA.
- What type of interface does the DAC8831 use for data input?
The DAC8831 uses an SPI serial interface for data input.
- What is the temperature range for specified performance of the DAC8831?
The specified performance temperature range is from –40°C to 125°C.
- Does the DAC8831 have a power-on reset function?
Yes, the DAC8831 has a power-on reset function that resets it to zero code or –VREF in bipolar mode.
- What are the key features of the DAC8831's architecture?
The DAC8831 features a segmented architecture with two matched DAC sections, and it includes Kelvin sense connections for precise reference and analog ground sensing.
- In which modes can the DAC8831 operate?
The DAC8831 can operate in both unipolar and bipolar modes.
- 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.
- How does the DAC8831 ensure low glitch and noise?
The DAC8831 is designed to minimize errors and provide a clean analog output through its low glitch and noise characteristics.
