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ADS1274IPAPRTIN/a20avaiQuad, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC 64-HTQFP -40 to 125
ADS1274IPAPTTIN/a20avaiQuad, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC 64-HTQFP -40 to 125


ADS1274IPAPR ,Quad, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC 64-HTQFP -40 to 125ELECTRICAL CHARACTERISTICSAll specifications at T =–40°C to +105°C, AVDD = +5V, DVDD = +1.8V, IOVDD ..
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ADS1274IPAPT ,Quad, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC 64-HTQFP -40 to 125MAXIMUM RATINGS(1)Over operating free-air temperature range unless otherwise notedADS1274, ADS1278 ..
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ADS1274IPAPR-ADS1274IPAPT
Quad, 128kHz, Simultaneous Sampling 24-Bit Delta Sigma ADC
SPI
IOVDD
DRDY/FSYNC
SCLK
DOUT[8:1]
DIN
ADS1274
ADS1278
www.ti.com
SBAS367F –JUNE 2007–REVISED FEBRUARY 2011
Quad/Octal, Simultaneous Sampling, 24-Bit Analog-to-Digital Converters
Checkfor Samples: ADS1274, ADS1278
1FEATURES DESCRIPTION
234• Simultaneously Measure Four/Eight Channels
Basedon the single-channel ADS1271, the ADS1274
(quad) and ADS1278 (octal) are 24-bit, delta-sigma• Upto 144kSPS Data Rate
(ΔΣ) analog-to-digital converters (ADCs) with data• AC Performance: ratesupto 144k samples per second (SPS), allowing70kHz Bandwidth simultaneous samplingof fouror eight channels. The111dB SNR (High-Resolution Mode) devices are offeredin identical packages, permitting–108dB THD drop-in expandability. DC Accuracy: Traditionally, industrial delta-sigma ADCs offering0.8μV/°C Offset Drift good drift performance use digital filters with large1.3ppm/°C Gain Drift passband droop. Asa result, they have limited signal Selectable Operating Modes: bandwidth and are mostly suited for dc
High-Speed: 144kSPS, 106dB SNR
measurements. High-resolution ADCs in audio
applications offer larger usable bandwidths, but theHigh-Resolution: 52kSPS, 111dB SNR
offset and drift specifications are significantly weakerLow-Power: 52kSPS, 31mW/ch than respective industrial counterparts. The ADS1274Low-Speed: 10kSPS, 7mW/ch and ADS1278 combine these typesof converters,• Linear Phase Digital Filter allowing high-precision industrial measurement with• SPI™or Frame-Sync Serial Interface excellentdc andac specifications. Low Sampling Aperture Error The high-order, chopper-stabilized modulator Modulator Output Option (digital filter bypass) achieves very low drift with low in-band noise. The
onboard decimation filter suppresses modulator and• Analog Supply: 5V signal out-of-band noise. These ADCs providea• Digital Core: 1.8V usable signal bandwidth upto 90%of the Nyquist• I/O Supply: 1.8Vto 3.3V rate with less than 0.005dBof ripple.
Four operating modes allowfor optimizationof speed,APPLICATIONS resolution, and power. All operations are controlled• Vibration/Modal Analysis directly by pins; there are no registersto program. Multi-Channel Data Acquisition The devices are fully specified over the extended
industrial range (–40°Cto +105°C) and are available• Acoustics/Dynamic Strain Gauges inan HTQFP-64 PowerPAD™ package.
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