Overview
The ADS1274IPAPTG4, produced by Texas Instruments, is a 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) designed for high-precision industrial measurements. This quad-channel ADC allows for simultaneous sampling of four channels with data rates up to 144k samples per second (SPS). It combines outstanding DC accuracy and AC performance, making it suitable for demanding multi-channel signal acquisition applications such as vibration analysis, medical monitoring, and industrial equipment.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Resolution | Number of bits | 24 bits |
| Data Rate | Maximum samples per second | Up to 144k SPS |
| AC Performance | Bandwidth and SNR | 70kHz bandwidth, 111dB SNR (High-Resolution Mode), –108dB THD |
| 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 | High-Speed: 144kSPS, 106dB SNR High-Resolution: 52kSPS, 111dB SNR Low-Power: 52kSPS, 31mW/ch Low-Speed: 10kSPS, 7mW/ch |
| Supply Voltages | Analog, Digital Core, I/O | Analog: 5V, Digital Core: 1.8V, I/O: 1.8V to 3.3V |
| Interface | Serial interface options | SPI™ or Frame-Sync Serial Interface |
Key Features
- Simultaneous sampling of four channels
- Linear phase digital filter
- Low sampling aperture error
- Modulator output option (digital filter bypass)
- Selectable frame-sync or SPI serial interface for convenient interfacing to DSPs, FPGAs, and microcontrollers
- High-order, chopper-stabilized modulator for low drift and noise
- Onboard decimation filter to suppress modulator and out-of-band noise
- Full specification over the extended industrial range (–40°C to +105°C)
Applications
- Vibration and modal analysis
- Multi-channel data acquisition
- Acoustics and dynamic strain gauges
- Pressure sensors
- Medical monitoring
- Industrial and energy metering equipment
Q & A
- What is the maximum data rate of the ADS1274?
The ADS1274 has a maximum data rate of up to 144k samples per second (SPS).
- How many channels can the ADS1274 simultaneously sample?
The ADS1274 can simultaneously sample four channels.
- What are the different operating modes of the ADS1274?
The ADS1274 has four operating modes: High-Speed, High-Resolution, Low-Power, and Low-Speed.
- What is the signal-to-noise ratio (SNR) in High-Resolution mode?
In High-Resolution mode, the SNR is 111dB.
- What is the offset drift and gain drift of the ADS1274?
The offset drift is 0.8µV/°C, and the gain drift is 1.3ppm/°C.
- What types of serial interfaces does the ADS1274 support?
The ADS1274 supports SPI™ or Frame-Sync Serial Interface.
- What is the power consumption in Low-Speed mode?
In Low-Speed mode, the power consumption is approximately 7mW per channel.
- What is the temperature range for the ADS1274?
The ADS1274 is fully specified over the extended industrial range of –40°C to +105°C.
- What kind of filter does the ADS1274 use?
The ADS1274 uses a linear phase digital filter and an onboard decimation filter to suppress modulator and out-of-band noise.
- What are some typical applications of the ADS1274?
Typical applications include vibration and modal analysis, multi-channel data acquisition, acoustics, dynamic strain gauges, pressure sensors, medical monitoring, and industrial and energy metering equipment.
