Overview
The DAC8234SPFB from Texas Instruments is a high-accuracy, quad-channel, 14-bit digital-to-analog converter (DAC). This device is designed to operate with unipolar output ranging from 0V to +20V and is known for its low integral nonlinearity (INL) error and low noise over a wide operating temperature range of –40°C to +105°C. The DAC8234SPFB features integrated reference buffers and output buffers, making it suitable for various precision applications.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 14-bit |
| Number of Channels | Quad-channel |
| Output Voltage Range | 0V to +20V |
| Integral Nonlinearity (INL) Error | ±0.5 LSB (typical), ±0.031 LSB (after user calibration) |
| Zero Error | ±0.25 LSB (after user calibration) |
| Gain Error | ±0.25 LSB (after user calibration) |
| Settling Time | 6µs |
| Noise | 60nV/√Hz |
| Configurable Gain | x2/x4 |
| SPI Clock Rate | Up to 50MHz |
| Operating Temperature | –40°C to +105°C |
| Package Options | QFN-40 (6x6mm), TQFP-48 (7x7mm) |
Key Features
- High-accuracy conversion with low INL and gain errors
- User-programmable system-level calibration for enhanced accuracy
- Integrated reference buffers and output buffers
- Configurable gain options (x2/x4)
- Low noise and fast settling time (6µs)
- Standard high-speed SPI interface (up to 50MHz) with daisy-chain mode
- Power-down mode and asynchronous load input (LDAC)
- Analog output monitor (VMON) pin for multiplexing individual DAC outputs or AIN pin
- General-purpose digital input/output pins (GPIO-0, GPIO-1)
Applications
- Automatic Test Equipment
- Instrumentation
- Industrial Process Control
- Communications
Q & A
- What is the resolution of the DAC8234SPFB?
The DAC8234SPFB has a resolution of 14 bits. - How many channels does the DAC8234SPFB have?
The DAC8234SPFB is a quad-channel DAC. - What is the output voltage range of the DAC8234SPFB?
The output voltage range is from 0V to +20V. - What is the typical integral nonlinearity (INL) error of the DAC8234SPFB?
The typical INL error is ±0.5 LSB, which can be improved to ±0.031 LSB after user calibration. - What is the settling time of the DAC8234SPFB?
The settling time is 6µs. - Does the DAC8234SPFB support SPI communication?
Yes, it supports a high-speed SPI interface up to 50MHz. - What are the package options for the DAC8234SPFB?
The package options include QFN-40 (6x6mm) and TQFP-48 (7x7mm). - What is the operating temperature range of the DAC8234SPFB?
The operating temperature range is –40°C to +105°C. - Does the DAC8234SPFB have power-down and reset features?
Yes, it has power-down mode and an asynchronous reset input (RST). - What is the purpose of the VMON pin on the DAC8234SPFB?
The VMON pin is an analog monitor output that multiplexes the individual DAC outputs or the AIN pin.
