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ADS1271IPW Datasheet(PDF) 1 Page - Texas Instruments

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Part # ADS1271IPW
Description  24-Bit, Wide Bandwidth Analog-to-Dogotal Converter
Download  38 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

ADS1271IPW Datasheet(HTML) 1 Page - Texas Instruments

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SBAS306F − NOVEMBER 2004 − REVISED OCTOBER 2007
24Bit, Wide Bandwidth
AnalogtoDigital Converter
ADS1271
FEATURES
D 105kSPS Data Rate
D AC Performance:
51kHz Bandwidth
109dB SNR (High-Resolution Mode)
−108dB THD
D DC Accuracy:
1.8
µV/°C Offset Drift
2ppm/
°C Gain Drift
D Selectable Operating Modes:
High-Speed: 105kSPS Data Rate
High-Resolution: 109dB SNR
Low-Power: 35mW Dissipation
D Power-Down Control
D Digital Filter:
Linear Phase Response
Passband Ripple:
±0.005dB
Stop Band Attenuation: 100dB
D Internal Offset Calibration On Command
D Selectable SPIt or Frame Sync Serial Interface
D Designed for Multichannel Systems:
Daisy-Chainable Serial Interface
Easy Synchronization
D Simple Pin-Driven Control
D Modulator Output Option
D Specified from −40°C to +105°C
D Analog Supply: 5V
D Digital Supply: 1.8V to 3.3V
APPLICATIONS
D Vibration/Modal Analysis
D Acoustics
D Dynamic Strain Gauges
D Pressure Sensors
D Test and Measurement
DESCRIPTION
The ADS1271 is a 24-bit, delta-sigma analog-to-digital
converter (ADC) with a data rate up to 105kSPS. It offers
a unique combination of excellent DC accuracy and
outstanding
AC
performance.
The
high-order,
chopper-stabilized modulator achieves very low drift with
low
in-band noise. The onboard decimation filter
suppresses modulator and signal out-of-band noise. The
ADS1271 provides a usable signal bandwidth up to 90%
of the Nyquist rate with less than 0.005dB of ripple.
Traditionally, industrial delta-sigma ADCs offering good
drift performance use digital filters with large passband
droop. As a result, they have limited signal bandwidth and
are mostly suited for DC measurements. High-resolution
ADCs in audio applications offer larger usable bandwidths,
but the offset and drift specification are significantly
weaker than their industrial counterparts. The ADS1271
combines these converters, allowing high-precision
industrial measurement with excellent DC and AC
specifications ensured over an extended industrial
temperature range.
Three operating modes allow for optimization of speed,
resolution, and power. A selectable SPI or a frame-sync
serial interface provides for convenient interfacing to
microcontrollers or DSPs. The output from the modulator
is accessible for external digital filter applications. All
operations, including internal offset calibration, are
controlled directly by pins; there are no registers to
program.
∆Σ
Modulator
Digital
Filter
VREFP VREFN
AVDD
DVDD
DRDY/FSYNC
SCLK
DOUT
DIN
FORMAT
AINP
AINN
Serial
Interface
Control
Logic
DGND
AGND
SYNC/PDWN
MODE
CLK
www.ti.com
Copyright
 2004−2007, Texas Instruments Incorporated
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.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
SPI is a trademark of Motorola Inc. All other trademarks are the property of their respective owners.


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