Overview
The DAC8234SPFBR, produced by 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 noise, low glitch, and high accuracy over a wide operating temperature range of –40°C to +105°C. The DAC8234 is trimmed in production for very low zero and gain errors and features a user-programmable system-level calibration function to achieve even higher accuracy.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 14-bit | |
| Output Range | 0V to +20V | |
| Integral Nonlinearity (INL) Error | ±0.5 LSB | |
| Zero Error (After User Calibration) | ±0.031 LSB | |
| Gain Error (After User Calibration) | ±0.25 LSB | |
| Noise | 60nV/√Hz | |
| Settling Time | 6µs | |
| Configurable Gain | x2/x4 | |
| SPI Clock Rate | Up to 50MHz | |
| Operating Temperature | –40°C to +105°C | |
| Packages | QFN-40 (6x6mm), TQFP-48 (7x7mm) |
Key Features
- High-accuracy, quad-channel, 14-bit DAC with low INL error and low noise.
- User-programmable system-level calibration for enhanced accuracy.
- Integrated reference buffers and output buffers.
- Standard high-speed SPI interface up to 50MHz, compatible with 1.8V, 3V, or 5V logic.
- Daisy-chain mode for multiple device operation.
- Power-down mode and asynchronous load input (LDAC) for simultaneous updates of all DACs.
- Analog output monitor (VMON) pin for multiplexing individual DAC outputs or the 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 DAC8234?
The DAC8234 has a resolution of 14 bits.
- What is the output voltage range of the DAC8234?
The output voltage range is from 0V to +20V.
- What is the integral nonlinearity (INL) error of the DAC8234?
The INL error is ±0.5 LSB.
- Can the DAC8234 be calibrated for higher accuracy?
Yes, it features a user-programmable system-level calibration function.
- What is the settling time of the DAC8234?
The settling time is 6µs.
- What is the maximum SPI clock rate for the DAC8234?
The maximum SPI clock rate is up to 50MHz.
- What are the available packages for the DAC8234?
The available packages are QFN-40 (6x6mm) and TQFP-48 (7x7mm).
- Does the DAC8234 support daisy-chain mode?
Yes, it supports daisy-chain mode for multiple device operation.
- What is the purpose of the VMON pin on the DAC8234?
The VMON pin is an analog monitor output that multiplexes the individual DAC outputs or the AIN pin.
- Are there any general-purpose digital input/output pins on the DAC8234?
Yes, there are GPIO-0 and GPIO-1 pins.
