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ADS1282IPW
Ultra High Resolution Delta Sigma ADC with PGA for Seismic and Energy Exploration
4th-Order
Programmable
Digital Filter
SPI
InterfaceCalibration
CLK
AVDD
DVDD
ADS1282DOUT
DIN
DRDY
SCLK
SYNC
RESET
PWDN
PGA
VREFN VREFP
Product
Folder
Sample &
Buy
Technical
Documents
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ADS1282SBAS418I –SEPTEMBER 2007–REVISED MARCH 2015
ADS1282 High-Resolution Analog-To-Digital Converter Features 3 DescriptionThe ADS1282 is an extremely high-performance, High Resolution: single-chip analog-to-digital converter (ADC) with an130-dB SNR (250 SPS) integrated, low-noise programmable gain amplifier• High Accuracy: (PGA) and two-channel input multiplexer (mux). TheTHD: –122 dB ADS1282is suitable for the demanding needsofINL: 0.5 ppm energy exploration and seismic monitoring
environments.• Low-Noise PGA Two-Channel Input Mux The converter usesa fourth-order, inherently stable,
delta-sigma (ΔΣ) modulator that provides outstanding• Inherently-Stable Modulator with Fast Responding noise and linearity performance. The modulatorisOverrange Detection used either in conjunction with the on-chip digital• Flexible Digital Filter: filter, or can be bypassed for use with postSinc+ FIR+ IIR (Selectable) processing filters.Linearor Minimum Phase Response The flexible input MUX provides an additionalProgrammable High-Pass Filter external input for measurement, as well as internalSelectable FIR Data Rates: 250 SPSto4 kSPS self-test connections. The PGA features outstanding• Filter Bypass Option low noise (5 nV/√Hz) and high input impedance, Low Power Consumption:25 mW allowing easy interfacing to geophones and
hydrophones overa wide rangeof gains.Shutdown:10 μW Offset and Gain Calibration Engine The digital filter provides selectable data rates from
250to 4000 samples per second (SPS). The high-• SYNC Input
pass filter (HPF) features an adjustable corner• Analog Supply: frequency. On-chip gain and offset scaling registersUnipolar (+5V)or Bipolar (±2.5V) support system calibration.• Digital Supply: 1.8Vto 3.3V The synchronization input (SYNC) can be usedto
synchronize the conversionsof multiple ADS1282s.
2 Applications The SYNC input also acceptsa clock input for• Energy Exploration continuous alignmentof conversions froman external
source.• Seismic Monitoring High-Accuracy Instrumentation Together, the amplifier, modulator, and filter dissipate mW. The ADS1282is availableina compact
TSSOP-28 package andis fully specified from –40°C +85°C, witha maximum operating range to
+125°C.
