Overview
The ADS1281IPWG4, produced by Texas Instruments, is an extremely high-performance, single-chip analog-to-digital converter (ADC) designed to meet 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 device is fully specified from –40°C to +85°C, with a maximum operating range up to +125°C, and is available in a compact TSSOP-24 package.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Signal-to-Noise Ratio (SNR) | 130dB (250SPS), 127dB (500SPS) | dB |
| Total Harmonic Distortion (THD) | –122dB (typ), –115dB (max) | dB |
| Integral Non-Linearity (INL) | 0.6ppm | ppm |
| Data Rates | 250SPS to 4kSPS | SPS |
| Power Consumption | 12mW (operating), 10µW (shutdown) | mW/µW |
| 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 (max +125°C) | °C |
Key Features
- Inherently stable, fourth-order delta-sigma modulator with fast responding over-range detection.
- Flexible digital filter consisting of sinc, FIR, and IIR stages with selectable decimation rates and filter bypass option.
- Programmable high-pass filter with adjustable corner frequency.
- Calibration engine for offset and gain correction.
- Synchronization input (SYNC) for synchronizing multiple ADS1281s and accepting an external clock input.
- Low power consumption with operating power of 12mW and shutdown power of 10µW.
- Compact TSSOP-24 package.
Applications
- Energy Exploration
- Seismic Monitoring
- High-Accuracy Instrumentation
Q & A
- What is the primary application of the ADS1281IPWG4?
The ADS1281IPWG4 is primarily designed for energy exploration and seismic monitoring environments.
- What is the signal-to-noise ratio (SNR) of the ADS1281IPWG4?
The SNR is 130dB at 250SPS and 127dB at 500SPS.
- What are the data rates supported by the ADS1281IPWG4?
The data rates range from 250SPS to 4kSPS.
- What type of digital filter does the ADS1281IPWG4 use?
The digital filter consists of sinc, FIR, and IIR stages.
- How does the SYNC input function on the ADS1281IPWG4?
The SYNC input can be used to synchronize the conversions of multiple ADS1281s and accept an external clock input.
- What is the power consumption of the ADS1281IPWG4?
The operating power is 12mW, and the shutdown power is 10µW.
- What is the operating temperature range of the ADS1281IPWG4?
The operating temperature range is from –40°C to +85°C, with a maximum operating range up to +125°C.
- What package type is the ADS1281IPWG4 available in?
The ADS1281IPWG4 is available in a compact TSSOP-24 package.
- Does the ADS1281IPWG4 support calibration for offset and gain?
Yes, it has a calibration engine for offset and gain correction.
- What are the analog and digital supply voltage ranges for the ADS1281IPWG4?
The analog supply can be unipolar (+5V) or bipolar (±2.5V), and the digital supply ranges from 1.8V to 3.3V.
