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ADS1271

更新时间: 2024-01-12 05:39:27
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描述
24 BIT WIDE BANDWIDTH ANALOG TO DIGITAL CONVERTER

ADS1271 数据手册

 浏览型号ADS1271的Datasheet PDF文件第2页浏览型号ADS1271的Datasheet PDF文件第3页浏览型号ADS1271的Datasheet PDF文件第4页浏览型号ADS1271的Datasheet PDF文件第5页浏览型号ADS1271的Datasheet PDF文件第6页浏览型号ADS1271的Datasheet PDF文件第7页 
SBAS306A − NOVEMBER 2004 − REVISED DECEMBER 2004  
ꢊꢏ  
FEATURES  
DESCRIPTION  
D
105kSPS Data Rate  
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  
D
AC Performance:  
51kHz Bandwidth  
outstanding  
AC  
performance.  
The  
high-order,  
109dB SNR (High-Resolution Mode)  
−105dB THD  
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.  
D
D
DC Accuracy:  
1.8µV/°C Offset Drift  
2ppm/°C Gain Drift  
Selectable Operating Modes:  
High-Speed: 105kSPS Data Rate  
High-Resolution: 109dB SNR  
Low-Power: 35mW Dissipation  
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.  
D
D
Power-Down Control  
Digital Filter:  
Linear Phase Response  
Passband Ripple: 0.005dB  
Stop Band Attenuation: 100dB  
D
D
D
Internal Offset Calibration On Command  
Selectable SPIt or Frame Sync Serial Interface  
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. All operations, including internal  
offset calibration, are controlled directly by pins; there are  
no registers to program.  
Designed for Multichannel Systems:  
Daisy-Chainable Serial Interface  
Easy Synchronization  
D
D
D
D
Simple Pin-Driven Control  
Specified from −40°C to +105°C  
Analog Supply: 5V  
VREFP VREFN  
AVDD  
DVDD  
Digital Supply: 1.8V to 3.3V  
SYNC/PDWN  
MODE  
Control  
Logic  
APPLICATIONS  
D
D
D
D
D
Vibration/Modal Analysis  
CLK  
Acoustics  
DRDY/FSYNC  
SCLK  
AINP  
AINN  
Dynamic Strain Gauges  
Pressure Sensors  
∆Σ  
Modulator  
Digital  
Filter  
Serial  
Interface  
DOUT  
DIN  
Test and Measurement  
FORMAT  
AGND  
DGND  
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.  
All trademarks are the property of their respective owners.  
ꢙꢚ ꢛ ꢒꢜ ꢓ ꢝꢞ ꢛꢟ ꢒ ꢎꢝꢎ ꢄꢋ ꢠꢐ ꢕ ꢡꢊ ꢅꢄꢐꢋ ꢄꢢ ꢣꢤ ꢕ ꢕ ꢉꢋꢅ ꢊꢢ ꢐꢠ ꢥꢤꢦ ꢏꢄꢣ ꢊꢅꢄ ꢐꢋ ꢈꢊ ꢅꢉꢧ ꢙꢕ ꢐꢈꢤ ꢣꢅꢢ  
ꢣ ꢐꢋ ꢠꢐꢕ ꢡ ꢅꢐ ꢢ ꢥꢉ ꢣ ꢄ ꢠꢄ ꢣ ꢊ ꢅꢄ ꢐꢋꢢ ꢥ ꢉꢕ ꢅꢍꢉ ꢅꢉ ꢕ ꢡꢢ ꢐꢠ ꢝꢉꢨ ꢊꢢ ꢞꢋꢢ ꢅꢕ ꢤꢡ ꢉꢋꢅ ꢢ ꢢꢅ ꢊꢋꢈ ꢊꢕ ꢈ ꢌ ꢊꢕ ꢕ ꢊ ꢋꢅꢩꢧ  
ꢙꢕ ꢐ ꢈꢤꢣ ꢅ ꢄꢐ ꢋ ꢥꢕ ꢐ ꢣ ꢉ ꢢ ꢢ ꢄꢋ ꢑ ꢈꢐ ꢉ ꢢ ꢋꢐꢅ ꢋꢉ ꢣꢉ ꢢꢢ ꢊꢕ ꢄꢏ ꢩ ꢄꢋꢣ ꢏꢤꢈ ꢉ ꢅꢉ ꢢꢅꢄ ꢋꢑ ꢐꢠ ꢊꢏ ꢏ ꢥꢊ ꢕ ꢊꢡ ꢉꢅꢉ ꢕ ꢢꢧ  
Copyright 2004, Texas Instruments Incorporated  
www.ti.com  

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