All other trademarks are the property of their respective owners
The ADS1281 is an extremely high-performance, single-chip analog-to-digital converter (ADC) designed for the demanding needs of energy exploration and seismic monitoring environments. The single-chip design promotes board area savings for improvements in high-density applications.
The converter uses a fourth-order, inherently stable, delta-sigma (
) modulator that provides outstanding noise and linearity performance. The modulator is used either in conjunction with the on-chip digital filter, or can be bypassed for use with post-processing filters.
The digital filter consists of sinc and finite impulse response (FIR) low-pass stages followed by an infinite impulse response (IIR) high-pass filter (HPF) stage. Selectable decimation provides data rates from 250 to 4000 samples per second (SPS). The FIR low-pass stage provides both linear and minimum phase response. The HPF features an adjustable corner frequency. On-chip gain and offset scaling registers support system calibration.
The synchronization input (SYNC) can be used to synchronize the conversions of multiple ADS1281s. The SYNC input also accepts a clock input for continuous alignment of conversions from an external source.
Together, the modulator and filter dissipate only 12mW. The ADS1281 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.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | High-Resolution A/D Converter datasheet (Rev. D) | 01 Jun 2010 | |
| Application note | Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs | PDF | HTML | 23 Mar 2022 | |
| E-book | Fundamentals of Precision ADC Noise Analysis | 19 Jun 2020 | ||
| EVM User's guide | ADS1281EVM, ADS1281EVM-PDK (Rev. D) | 14 May 2016 | ||
| Technical article | Leverage coherent sampling and FFT windows when evaluating SAR ADCs (Part 1) | 13 Mar 2015 |
For additional terms or required resources, click any title below to view the detail page where available.
ADCPro™ is a modular software system for evaluating analog-to-digital converters (ADCs) without the need for expensive logic analyzers and complex analysis routines. Used alone it is suitable for performing analysis on data sets captured from ADC testing; when paired with a Texas Instruments (...)
The ADS1281EVM-PDK is a complete evaluation/demonstration kit, which combines ADS1281EVM with the DSP-based MMB0 motherboard for use with a personal computer. The MMB0 motherboard allows the ADS1281EVM to connect to a computer via a USB port. The ADS1281EVM-PDK is controlled by the ADCPro™ (...)
| Package | Pins | Download |
|---|---|---|
| TSSOP (PW) | 24 | View options |
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.