Overview
The ADS1278IPAPTG4, produced by Texas Instruments, is a high-performance, octal-channel, 24-bit delta-sigma analog-to-digital converter (ADC). This device is designed for simultaneous sampling of eight channels, making it ideal for demanding multi-channel signal acquisition applications. Based on the single-channel ADS1271, the ADS1278 combines the benefits of industrial and high-resolution ADCs, offering excellent DC and AC specifications. It features a high-order, chopper-stabilized modulator and an onboard decimation filter, which provide very low drift and low in-band noise, along with a usable signal bandwidth up to 90% of the Nyquist rate.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24 | Bits |
| Number of Input Channels | 8 | |
| Sample Rate (max) | 144 kSPS | |
| Signal-to-Noise Ratio (SNR) | Up to 111 dB | |
| Total Harmonic Distortion (THD) | -108 dB | |
| Offset Drift | 0.8 μV/°C | |
| Gain Drift | 1.3 ppm/°C | |
| Analog Supply Voltage (AVDD) | 4.75V to 5.25V | V |
| Digital Core Supply Voltage (DVDD) | 1.65V to 2.2V | V |
| Operating Temperature Range | -55°C to 175°C | °C |
| Interface | SPI or Frame-Sync Serial | |
| Power Consumption (Typical) | 530 mW (total), 7 mW/channel (Low-Speed mode) | mW |
Key Features
- Simultaneous sampling of eight channels
- High-order, chopper-stabilized modulator for low drift and noise
- Onboard decimation filter for suppressing modulator and out-of-band noise
- Usable signal bandwidth up to 90% of the Nyquist rate
- Four operating modes: High-Speed (144 kSPS), High-Resolution (52 kSPS, 111 dB SNR), Low-Power (52 kSPS, 31 mW/ch), and Low-Speed (10 kSPS, 7 mW/ch)
- Linear phase digital filter
- Modulator output option (digital filter bypass)
- Selectable frame-sync or SPI serial interface for convenient interfacing to DSPs, FPGAs, and microcontrollers
- Low sampling aperture error
Applications
- Vibration analysis
- Medical monitoring
- Industrial and energy metering equipment
- High channel count systems requiring simultaneous sampling
Q & A
- What is the resolution of the ADS1278IPAPTG4?
The ADS1278IPAPTG4 has a resolution of 24 bits.
- How many input channels does the ADS1278IPAPTG4 support?
The ADS1278IPAPTG4 supports eight input channels.
- What is the maximum sample rate of the ADS1278IPAPTG4?
The maximum sample rate of the ADS1278IPAPTG4 is 144 kSPS.
- What is the signal-to-noise ratio (SNR) of the ADS1278IPAPTG4?
The SNR of the ADS1278IPAPTG4 can be up to 111 dB.
- What are the operating modes available for the ADS1278IPAPTG4?
The ADS1278IPAPTG4 offers four operating modes: High-Speed, High-Resolution, Low-Power, and Low-Speed.
- What type of interface does the ADS1278IPAPTG4 support?
The ADS1278IPAPTG4 supports both SPI and frame-sync serial interfaces.
- What is the typical power consumption of the ADS1278IPAPTG4?
The typical power consumption of the ADS1278IPAPTG4 is 530 mW, with a low-speed mode consuming 7 mW per channel.
- What is the operating temperature range of the ADS1278IPAPTG4?
The operating temperature range of the ADS1278IPAPTG4 is -55°C to 175°C.
- What are some common applications for the ADS1278IPAPTG4?
The ADS1278IPAPTG4 is commonly used in vibration analysis, medical monitoring, industrial and energy metering equipment, and high channel count systems.
- How does the ADS1278IPAPTG4 achieve low drift and noise?
The ADS1278IPAPTG4 achieves low drift and noise through its high-order, chopper-stabilized modulator and onboard decimation filter.
