Overview
The DAC8871SPWG4, produced by Texas Instruments, is a 16-bit, single-channel, serial-input, voltage-output digital-to-analog converter (DAC). This device operates from a dual power supply ranging from ±13.5V to ±19.8V and is known for its ultra-low power consumption, typically around 10µA. The DAC8871 features a high-speed SPI serial interface capable of operating up to 50MHz, making it suitable for communication with DSPs or microprocessors. The output range is determined by the reference voltages VREFH and VREFL, allowing for both unipolar and bipolar output configurations up to ±18V.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 16 | - | - | Bits |
| Output Range | VREFL to VREFH | - | - | V |
| Supply Voltage (VCC/VSS) | ±13.5 | ±15 | ±19.8 | V |
| Power Consumption | 3 | 10 | - | µA |
| Settling Time | - | 1µs | - | - |
| Output Impedance | - | 6.25 kΩ | - | - |
| Operating Temperature Range | -40 | - | +105 | °C |
| Package Type | - | - | TSSOP-16 | - |
Key Features
- 16-bit resolution with high accuracy (INL: 1LSB, DNL: ±0.25LSB)
- Ultra-low power consumption (typically 10µA)
- High-speed SPI serial interface up to 50MHz
- Output range configurable from VREFL to VREFH, allowing unipolar or bipolar configurations up to ±18V
- Fast settling time of 1µs to 1LSB of full-scale output
- Low noise: 10nV/√Hz
- Selectable reset to zero or mid-scale
- Power-on reset function for a known power-up state
- Available in a TSSOP-16 package
Applications
- Portable Equipment
- Automatic Test Equipment
- Industrial Process Control
- Data Acquisition Systems
- Optical Networking
Q & A
- What is the resolution of the DAC8871?
The DAC8871 has a 16-bit resolution.
- What is the typical power consumption of the DAC8871?
The typical power consumption is around 10µA.
- What is the maximum speed of the SPI serial interface?
The SPI serial interface can operate up to 50MHz.
- How is the output range of the DAC8871 configured?
The output range is determined by the reference voltages VREFH and VREFL, allowing for both unipolar and bipolar configurations up to ±18V.
- What is the settling time of the DAC8871?
The settling time is 1µs to 1LSB of full-scale output.
- What is the noise level of the DAC8871?
The noise level is 10nV/√Hz.
- Does the DAC8871 have a power-on reset function?
Yes, it has a power-on reset function for a known power-up state.
- What package type is the DAC8871 available in?
The DAC8871 is available in a TSSOP-16 package.
- What are some common applications of the DAC8871?
Common applications include portable equipment, automatic test equipment, industrial process control, data acquisition systems, and optical networking.
- How does the DAC8871 handle data transfer?
The DAC8871 uses a standard 3-wire SPI serial interface where data is transferred synchronously on the falling edge of SCLK and latched on the rising edge of SCLK into the input shift register.
