Overview
The ADS1278SKGDA, produced by Texas Instruments, is a high-performance, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC). This octal ADC is designed for simultaneous sampling of eight channels, making it ideal for various industrial and measurement applications. Based on the single-channel ADS1271, the ADS1278 combines the benefits of industrial and audio ADCs, offering high-precision measurements with excellent DC and AC specifications. The device features a high-order, chopper-stabilized modulator and an onboard decimation filter, which together achieve very low drift and low in-band noise. It is fully specified over an extended industrial temperature range of –40°C to 105°C and is available in an HTQFP-64 PowerPAD package.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Resolution | Number of bits | 24 bits |
| Data Rate | Maximum samples per second (SPS) | Up to 144k SPS |
| AC Performance | Bandwidth and SNR in High-Resolution Mode | 70kHz Bandwidth, 111dB SNR |
| DC Accuracy | Offset Drift and Gain Drift | 0.8µV/°C Offset Drift, 1.3ppm/°C Gain Drift |
| Operating Modes | High-Speed, High-Resolution, Low-Power, Low-Speed |
|
| Analog Supply | Voltage range | 4.75V to 5.25V |
| Digital Core Supply | Voltage range | 1.65V to 1.95V |
| I/O Supply | Voltage range | 1.65V to 3.6V |
| Operating Temperature Range | Temperature range | –40°C to 105°C |
| Package | Type and pins | HTQFP-64 PowerPAD |
Key Features
- Simultaneous measurement of eight channels
- Up to 144k SPS data rate
- High AC performance: 70kHz bandwidth, 111dB SNR in High-Resolution Mode
- Excellent DC accuracy: 0.8µV/°C offset drift, 1.3ppm/°C gain drift
- Selectable operating modes: High-Speed, High-Resolution, Low-Power, Low-Speed
- Linear phase digital filter
- SPI or Frame-Sync serial interface
- Low sampling aperture error
- Modulator output option (digital filter bypass)
Applications
- Vibration/Modal Analysis
- Multi-Channel Data Acquisition
- Acoustics/Dynamic Strain Gauges
- Pressure Sensors
Q & A
- What is the resolution of the ADS1278SKGDA ADC?
The ADS1278SKGDA is a 24-bit analog-to-digital converter.
- What is the maximum data rate of the ADS1278SKGDA?
The maximum data rate is up to 144k samples per second (SPS).
- What are the different operating modes of the ADS1278SKGDA?
The device has four operating modes: High-Speed, High-Resolution, Low-Power, and Low-Speed.
- What is the operating temperature range of the ADS1278SKGDA?
The operating temperature range is –40°C to 105°C.
- What type of package is the ADS1278SKGDA available in?
The device is available in an HTQFP-64 PowerPAD package.
- What are the typical applications of the ADS1278SKGDA?
Typical applications include vibration/modal analysis, multi-channel data acquisition, acoustics/dynamic strain gauges, and pressure sensors.
- What is the analog supply voltage range for the ADS1278SKGDA?
The analog supply voltage range is 4.75V to 5.25V.
- What is the digital core supply voltage range for the ADS1278SKGDA?
The digital core supply voltage range is 1.65V to 1.95V.
- What is the I/O supply voltage range for the ADS1278SKGDA?
The I/O supply voltage range is 1.65V to 3.6V.
- Does the ADS1278SKGDA support simultaneous sampling of multiple channels?
Yes, it supports simultaneous sampling of eight channels.
