Overview
The ADS1281IPW is an ultra-high-performance, single-chip analog-to-digital converter (ADC) designed by Texas Instruments. It is specifically tailored for the demanding needs of energy exploration and seismic monitoring environments. This ADC features a fourth-order, inherently stable delta-sigma modulator, which provides outstanding noise and linearity performance. The single-chip design promotes board area savings, making it ideal for high-density applications. The ADS1281IPW is available in a compact TSSOP-24 package and is fully specified from –40°C to +85°C, with a maximum operating range to +125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 31 bits | |
| Data Rate | 250 SPS to 4 kSPS | |
| Signal-to-Noise Ratio (SNR) | 130 dB (250 SPS), 127 dB (500 SPS) | dB |
| Total Harmonic Distortion (THD) | –122 dB (typ), –115 dB (max) | dB |
| Integral Nonlinearity (INL) | 0.6 ppm | |
| Analog Supply | Unipolar (+5V) or Bipolar (±2.5V) | V |
| Digital Supply | 1.8V to 3.3V | V |
| Operating Temperature Range | –40°C to +85°C | °C |
| Package Type | TSSOP-24 | |
| Power Consumption | 12 mW (operating), 10 µW (shutdown) | mW/µW |
Key Features
- High Resolution and Accuracy: 130 dB SNR at 250 SPS and 127 dB SNR at 500 SPS, with THD of –122 dB (typ) and INL of 0.6 ppm.
- Flexible Digital Filter: Sinc + FIR + IIR (selectable), with linear or minimum phase response and programmable high-pass filter.
- Low Power Consumption: Operating power of 12 mW and shutdown power of 10 µW.
- Calibration Engine: For offset and gain correction.
- Synchronization Input (SYNC): For synchronizing multiple ADS1281s and accepting a clock input for continuous alignment.
- Analog and Digital Supplies: Unipolar (+5V) or bipolar (±2.5V) analog supply, and 1.8V to 3.3V digital supply.
Applications
- Energy Exploration: Suitable for high-accuracy measurements in energy exploration environments.
- Seismic Monitoring: Designed for the precise requirements of seismic monitoring applications.
- High-Accuracy Instrumentation: Ideal for various high-accuracy instrumentation needs.
Q & A
- What is the resolution of the ADS1281IPW ADC?
The ADS1281IPW has a resolution of 31 bits. - What are the data rates supported by the ADS1281IPW?
The data rates range from 250 SPS to 4 kSPS. - What is the signal-to-noise ratio (SNR) of the ADS1281IPW at different data rates?
The SNR is 130 dB at 250 SPS and 127 dB at 500 SPS. - What is the total harmonic distortion (THD) of the ADS1281IPW?
The THD is –122 dB (typ) and –115 dB (max). - What type of digital filter does the ADS1281IPW use?
The ADS1281IPW uses a Sinc + FIR + IIR digital filter. - How does the SYNC input function in the ADS1281IPW?
The SYNC input is used to synchronize the conversions of multiple ADS1281s and can accept a clock input for continuous alignment. - What are the power consumption characteristics of the ADS1281IPW?
The operating power is 12 mW, and the shutdown power is 10 µW. - What is the operating temperature range of the ADS1281IPW?
The operating temperature range is –40°C to +85°C, with a maximum operating range to +125°C. - What package type is the ADS1281IPW available in?
The ADS1281IPW is available in a TSSOP-24 package. - What are the typical applications of the ADS1281IPW?
The typical applications include energy exploration, seismic monitoring, and high-accuracy instrumentation.
