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ADS1278-HT Datasheet(PDF) 1 Page - Texas Instruments |
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ADS1278-HT Datasheet(HTML) 1 Page - Texas Instruments |
1 / 56 page ADS1278-HT www.ti.com SBAS447E – MARCH 2009 – REVISED APRIL 2013 OCTAL SIMULTANEOUS-SAMPLING 24-BIT ANALOG-TO-DIGITAL CONVERTER Check for Samples: ADS1278-HT 1 FEATURES APPLICATIONS 23 • Simultaneously Measure Eight Channels • Down-Hole Drilling • Up to 128-kSPS Data Rate • High Temperature Environments • AC Performance: • Vibration/Modal Analysis 62-kHz Bandwidth • Multi-Channel Data Acquisition 111-dB SNR (High-Resolution Mode) • Acoustics/Dynamic Strain Gauges –108-dB THD • Pressure Sensors • DC Accuracy: 0.8- μV/°C Offset Drift DESCRIPTION 1.3-ppm/°C Gain Drift Based on the single-channel ADS1271, the ADS1278 • Selectable Operating Modes: (octal) is a 24-bit, delta-sigma ( ΔΣ) analog-to-digital High-Speed: 128 kSPS, 106 dB SNR converter (ADC) with data rates up to 128 k samples High-Resolution: 52 kSPS, 111 dB SNR per second (SPS), allowing simultaneous sampling of eight channels. Low-Power: 52 kSPS, 31 mW/ch Low-Speed: 10 kSPS, 7 mW/ch Traditionally, industrial delta-sigma ADCs offering • Linear Phase Digital Filter good drift performance use digital filters with large passband droop. As a result, they have limited signal • SPI™ or Frame-Sync Serial Interface bandwidth and are mostly suited for dc • Low Sampling Aperture Error measurements. High-resolution ADCs in audio • Modulator Output Option (digital filter bypass) applications offer larger usable bandwidths, but the offset and drift specifications are significantly weaker • Analog Supply: 5 V than respective industrial counterparts. The ADS1278 • Digital Core: 1.8 V combines these types of converters, allowing high- • I/O Supply: 1.8 V to 3.3 V precision industrial measurement with excellent dc and ac specifications. • Currently Available in an HTQFP-64 PowerPAD™ package, an 84-Pin HFQ Package The high-order, chopper-stabilized modulator and a KGD Chiptray Option achieves very low drift with low in-band noise. The onboard decimation filter suppresses modulator and SUPPORTS EXTREME TEMPERATURE signal out-of-band noise. These ADCs provide a APPLICATIONS usable signal bandwidth up to 90% of the Nyquist rate with less than 0.005 dB of ripple. • Controlled Baseline Four operating modes allow for optimization of speed, • One Assembly/Test Site resolution, and power. All operations are controlled • One Fabrication Site directly by pins; there are no registers to program. • Available in Extreme (–55°C/210°C) The device is fully specified over the extended Temperature Range (1) industrial range (–55°C to 210°C) and is available in an HTQFP-64 PowerPAD package (-55°C to 175°C), • Extended Product Life Cycle an 84-pin HFQ package and a KGD chiptray option. • Extended Product-Change Notification • Product Traceability • Texas Instruments High Temperature Products Utilize Highly Optimized Silicon (Die) Solutions With Dsign and Process Enhancements to Maximize Performance Over Extended Temperatures (1) Custom temperature ranges available 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 SPI is a trademark of Motorola, Inc. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2009–2013, 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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