Overview
The ADS1278IPAPT from Texas Instruments is a 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) designed for high-precision industrial measurements. Based on the single-channel ADS1271, the ADS1278 is part of a family that includes the quad-channel ADS1274 and the octal-channel ADS1278. These ADCs support simultaneous sampling of up to eight channels with data rates up to 144k samples per second (SPS). They are offered in an HTQFP-64 PowerPAD™ package, allowing for drop-in expandability and full specification over the extended industrial temperature range of –40°C to +105°C.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Resolution | Number of bits | 24 bits |
| Data Rate | Maximum samples per second | Up to 144k SPS |
| AC Performance | Bandwidth, SNR, THD | 70kHz Bandwidth, 111dB SNR (High-Resolution Mode), –108dB THD |
| DC Accuracy | Offset Drift, Gain Drift | 0.8µV/°C Offset Drift, 1.3ppm/°C Gain Drift |
| Operating Modes | High-Speed, High-Resolution, Low-Power, Low-Speed | High-Speed: 144kSPS, 106dB SNR High-Resolution: 52kSPS, 111dB SNR Low-Power: 52kSPS, 31mW/ch Low-Speed: 10kSPS, 7mW/ch |
| Analog Supply | Voltage range | 5V |
| Digital Core Supply | Voltage range | 1.8V |
| I/O Supply | Voltage range | 1.8V to 3.3V |
| Operating Temperature Range | Temperature range | –40°C to +105°C |
| Package | Type and pins | HTQFP-64 PowerPAD™ package |
Key Features
- Simultaneous measurement of four or eight channels
- Up to 144kSPS data rate
- Linear phase digital filter
- SPI™ or Frame-Sync serial interface
- Low sampling aperture error
- Modulator output option (digital filter bypass)
- High-order, chopper-stabilized modulator for low drift and noise
- Onboard decimation filter to suppress out-of-band noise
- Usable signal bandwidth up to 90% of the Nyquist rate with less than 0.005dB of ripple
Applications
- Vibration/modal analysis
- Multi-channel data acquisition
- Acoustics/dynamic strain gauges
- Pressure sensors
Q & A
- What is the resolution of the ADS1278IPAPT?
The ADS1278IPAPT has a resolution of 24 bits.
- What are the different operating modes of the ADS1278IPAPT?
The ADS1278IPAPT has four operating modes: High-Speed, High-Resolution, Low-Power, and Low-Speed.
- What is the maximum data rate of the ADS1278IPAPT?
The maximum data rate is up to 144k samples per second (SPS).
- What is the operating temperature range of the ADS1278IPAPT?
The operating temperature range is –40°C to +105°C.
- What type of package does the ADS1278IPAPT come in?
The ADS1278IPAPT comes in an HTQFP-64 PowerPAD™ package.
- Does the ADS1278IPAPT support simultaneous sampling?
- What are the power supply requirements for the ADS1278IPAPT?
The analog supply is 5V, the digital core supply is 1.8V, and the I/O supply is 1.8V to 3.3V.
- What are some common applications of the ADS1278IPAPT?
Common applications include vibration/modal analysis, multi-channel data acquisition, acoustics/dynamic strain gauges, and pressure sensors.
- Does the ADS1278IPAPT have a digital filter?
- What is the signal bandwidth of the ADS1278IPAPT?
The usable signal bandwidth is up to 90% of the Nyquist rate with less than 0.005dB of ripple.
