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ADS1281IPWR Datasheet(PDF) 1 Page - Texas Instruments |
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ADS1281IPWR Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 51 page  ADS1281 4th-Order DS Modulator Programmable DigitalFilter Serial Interface Calibration Control AINP CLK AVDD AVSS DVDD DGND AINN Over-Range ModulatorOutput ADS1281 DOUT DIN DRDY SCLK SYNC RESET PWDN 3 VREFN VREFP ADS1281 www.ti.com SBAS378D – AUGUST 2007 – REVISED JUNE 2010 High-Resolution Analog-to-Digital Converter Check for Samples: ADS1281 1 FEATURES DESCRIPTION 2 • High Resolution: The ADS1281 is an extremely high-performance, single-chip analog-to-digital converter (ADC) – 130dB SNR (250SPS) designed for the demanding needs of energy – 127dB SNR (500SPS) exploration and seismic monitoring environments. • High Accuracy: The single-chip design promotes board area savings – THD: –122dB (typ), –115dB (max) for improvements in high-density applications. – INL: 0.6ppm The converter uses a fourth-order, inherently stable, delta-sigma ( ΔΣ) modulator that provides outstanding • Inherently Stable Modulator with Fast noise and linearity performance. The modulator is Responding Over-Range Detection used either in conjunction with the on-chip digital • Flexible Digital Filter: filter, or can be bypassed for use with – Sinc + FIR + IIR (Selectable) post-processing filters. – Linear or Minimum Phase Response The digital filter consists of sinc and finite impulse – Programmable High-Pass Filter response (FIR) low-pass stages followed by an infinite impulse response (IIR) high-pass filter (HPF) – Selectable FIR Data Rates: stage. Selectable decimation provides data rates from – 250SPS to 4kSPS 250 to 4000 samples per second (SPS). The FIR • Filter Bypass Option low-pass stage provides both linear and minimum phase response. The HPF features an adjustable • Low Power Consumption: corner frequency. On-chip gain and offset scaling – Operating: 12mW registers support system calibration. – Shutdown: 10mW The synchronization input (SYNC) can be used to • Calibration Engine for Offset and synchronize the conversions of multiple ADS1281s. Gain Correction The SYNC input also accepts a clock input for • SYNC Input continuous alignment of conversions from an external source. • Analog Supply: – Unipolar (+5V) or Bipolar (±2.5V) Together, the modulator and filter dissipate only 12mW. The ADS1281 is available in a compact • Digital Supply: 1.8V to 3.3V TSSOP-24 package and is fully specified from –40°C to +85°C, with a maximum operating range to APPLICATIONS +125°C. • Energy Exploration • Seismic Monitoring • High-Accuracy Instrumentation 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2007–2010, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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