Overview
The Texas Instruments ADS1278HPAP is a high-performance, octal, simultaneous-sampling, 24-bit analog-to-digital converter (ADC). This device is based on the single-channel ADS1271 and is designed to offer high-precision industrial measurements with excellent DC and AC specifications. The ADS1278HPAP features a delta-sigma (ΔΣ) architecture with a high-order, chopper-stabilized modulator, which achieves very low drift and low in-band noise. It supports simultaneous sampling of eight channels, making it ideal for various industrial and high-temperature applications.
Key Specifications
| Parameter | Value |
|---|---|
| Data Rate | Up to 128 kSPS |
| Resolution | 24-bit |
| AC Performance | 62-kHz Bandwidth, 111-dB SNR (High-Resolution Mode), –108-dB THD |
| DC Accuracy | 0.8-µV/°C Offset Drift, 1.3-ppm/°C Gain Drift |
| Operating Modes | High-Speed: 128 kSPS, 106 dB SNR; High-Resolution: 52 kSPS, 111 dB SNR; Low-Power: 52 kSPS, 31 mW/ch; Low-Speed: 10 kSPS, 7 mW/ch |
| Analog Supply | 5 V |
| Digital Core Supply | 1.8 V |
| I/O Supply | 1.8 V to 3.3 V |
| Package Options | HTQFP-64 PowerPAD™, 84-Pin HFQ, KGD Chiptray |
| Temperature Range | –55°C to 210°C |
Key Features
- Simultaneous sampling of eight channels
- High-order, chopper-stabilized modulator for low drift and noise
- Onboard decimation filter for out-of-band noise suppression
- Linear phase digital filter
- SPI or Frame-Sync serial interface
- Low sampling aperture error
- Modulator output option (digital filter bypass)
- Four selectable operating modes for speed, resolution, and power optimization
- No registers to program; all operations controlled by pins
Applications
- Down-Hole Drilling
- High Temperature Environments
- Vibration/Modal Analysis
- Multi-Channel Data Acquisition
- Acoustics/Dynamic Strain Gauges
- Pressure Sensors
Q & A
- What is the maximum data rate of the ADS1278HPAP?
The maximum data rate of the ADS1278HPAP is up to 128 kSPS. - What is the resolution of the ADS1278HPAP?
The resolution of the ADS1278HPAP is 24-bit. - What are the AC performance specifications of the ADS1278HPAP?
The AC performance specifications include a 62-kHz bandwidth, 111-dB SNR in High-Resolution Mode, and –108-dB THD. - What are the DC accuracy specifications of the ADS1278HPAP?
The DC accuracy specifications include 0.8-µV/°C offset drift and 1.3-ppm/°C gain drift. - What operating modes are available on the ADS1278HPAP?
The available operating modes are High-Speed, High-Resolution, Low-Power, and Low-Speed. - What are the supply voltage requirements for the ADS1278HPAP?
The analog supply is 5 V, the digital core supply is 1.8 V, and the I/O supply is 1.8 V to 3.3 V. - In what temperature range is the ADS1278HPAP specified?
The ADS1278HPAP is specified over the extended industrial range of –55°C to 210°C. - What package options are available for the ADS1278HPAP?
The package options include HTQFP-64 PowerPAD™, 84-Pin HFQ, and KGD Chiptray. - What are some typical applications of the ADS1278HPAP?
Typical applications include down-hole drilling, high-temperature environments, vibration/modal analysis, multi-channel data acquisition, acoustics/dynamic strain gauges, and pressure sensors. - How is the operation of the ADS1278HPAP controlled?
All operations are controlled directly by pins; there are no registers to program.
