Overview
The Texas Instruments ADS1281IPWR is a high-performance, single-chip analog-to-digital converter (ADC) designed to meet the demanding needs of applications such as energy exploration, seismic monitoring, and high-accuracy instrumentation. This 31-bit ADC features a fourth-order ΔΣ modulator and a programmable digital filter, providing high resolution and accuracy. The device operates with a digital supply range of 1.8V to 3.3V and supports both unipolar and bipolar analog power supplies, offering flexibility in input range. The ADS1281IPWR is available in a compact TSSOP-24 package and is fully specified from –40°C to +85°C, with a maximum operating range up to +125°C.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Resolution | No. of bits | 31 bits |
| Data Rate | SPS (Samples Per Second) | 250 to 4000 SPS (FIR filter mode), 8,000 to 128,000 SPS (Sinc filter mode) |
| Signal-to-Noise Ratio (SNR) | dB | 130 dB (250 SPS), 127 dB (500 SPS), 120 dB (1000 SPS) |
| Total Harmonic Distortion (THD) | dB | –122 dB (typ), –115 dB (max) |
| Integral Nonlinearity (INL) | % FSR | 0.00006% (typ), 0.0005% (max) |
| Analog Supply | V | Unipolar (+5V) or Bipolar (±2.5V) |
| Digital Supply | V | 1.8V to 3.3V |
| Package | TSSOP-24 | |
| Operating Temperature | °C | –40°C to +85°C |
| Power Dissipation | mW | 12 mW (typ), 90 mW (max) in standby mode, 10 mW (typ), 150 mW (max) in power-down mode |
Key Features
- High Resolution and Accuracy: The ADS1281IPWR offers a high signal-to-noise ratio (SNR) of up to 130 dB and low total harmonic distortion (THD) of –122 dB, ensuring high accuracy in measurements.
- Programmable Digital Filter: The device includes a variable decimation rate, fifth-order sinc filter, decimate-by-32 FIR low-pass filter with programmable phase, and an adjustable high-pass filter for dc removal.
- Calibration Engine: Features gain and offset registers for calibration and sensor gain matching.
- Synchronization Input: The SYNC input allows synchronization of conversions with an external event or clock, enabling continuous alignment of conversions from multiple ADS1281 devices.
- Low Power Consumption: The modulator and filter dissipate only 12 mW, with standby and power-down modes available for reduced power consumption.
- Flexible Power Supplies: Supports both unipolar and bipolar analog power supplies and a digital supply range of 1.8V to 3.3V.
Applications
- Energy Exploration: Suitable for high-resolution data acquisition in energy exploration applications.
- Seismic Monitoring: Designed for the demanding requirements of seismic monitoring environments.
- High-Accuracy Instrumentation: Ideal for applications requiring high accuracy and precision, such as chromatography and other exacting instrumentation needs.
Q & A
- What is the resolution of the ADS1281IPWR?
The ADS1281IPWR has a resolution of 31 bits. - What are the data rate options for the ADS1281IPWR?
The data rate options range from 250 to 4000 SPS in FIR filter mode and 8,000 to 128,000 SPS in Sinc filter mode. - What is the signal-to-noise ratio (SNR) of the ADS1281IPWR?
The SNR is up to 130 dB at 250 SPS, 127 dB at 500 SPS, and 120 dB at 1000 SPS. - What are the power supply options for the ADS1281IPWR?
The device supports unipolar (+5V) or bipolar (±2.5V) analog power supplies and a digital supply range of 1.8V to 3.3V. - How does the SYNC input function in the ADS1281IPWR?
The SYNC input allows synchronization of conversions with an external event or clock, enabling continuous alignment of conversions from multiple ADS1281 devices. - What is the typical power dissipation of the ADS1281IPWR?
The typical power dissipation is 12 mW, with standby and power-down modes available for reduced power consumption. - What are the key applications of the ADS1281IPWR?
The key applications include energy exploration, seismic monitoring, and high-accuracy instrumentation. - What is the operating temperature range of the ADS1281IPWR?
The operating temperature range is –40°C to +85°C, with a maximum operating range up to +125°C. - Does the ADS1281IPWR support calibration?
Yes, the device features gain and offset registers for calibration and sensor gain matching. - What is the package type of the ADS1281IPWR?
The device is available in a TSSOP-24 package.
