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ADS1174

更新时间： 2024-01-13 05:53:35
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德州仪器 - TI 转换器
页数 文件大小 规格书
35页 1031K
描述
Quad/Octal, Simultaneous Sampling, 16-Bit Analog-to-Digital Converters

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ADS1174 数据手册

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ADS1174  
ADS1178  
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SBAS373–OCTOBER 2007  
Quad/Octal, Simultaneous Sampling, 16-Bit Analog-to-Digital Converters  
1
FEATURES  
DESCRIPTION  
234  
•
Synchronously Sample Four/Eight Channels  
•
•
Selectable Operating Modes:  
High-Speed: 52kSPS Data Rate, 30mW/ch  
Low-Power: 10kSPS Data Rate, 8mW/ch  
The ADS1174 (quad) and ADS1178 (octal) are  
multiple delta-sigma (ΔΣ) analog-to-digital converters  
(ADCs) with data rates up to 52k samples-per-second  
(SPS), which allow synchronous sampling of four and  
eight channels. These devices use identical  
packages, permitting drop-in expandability.  
AC Performance:  
25kHz Bandwidth  
97dB SNR  
The delta-sigma architecture offers near ideal 16-bit  
ac performance (97dB SNR, –105dB THD, 1LSB  
linearity) combined with 0.005dB passband ripple,  
and linear phase response.  
–105dB THD  
•
Digital Filter:  
Linear Phase Response  
Passband Ripple: ±0.005dB  
Stop Band Attenuation: 100dB  
The high-order, chopper- stabilized modulator  
achieves very low drift (4μV/°C offset, 4ppm/°C gain)  
and low noise (1LSBPP). The on-chip finite impulse  
•
Selectable SPI™ or Frame Sync Serial  
Interface  
response (FIR) filter provides  
a usable signal  
•
•
•
•
•
•
Simple Pin-Driven Control  
Low Sampling Aperture Error  
Specified from –40°C to +105°C  
Analog Supply: 5V  
bandwidth up to 90% of the Nyquist rate with 100dB  
of stop band attenuation while suppressing modulator  
and signal out-of-band noise.  
Two operating modes allow for optimization of speed  
and power: High-speed mode (32mW/Ch at 52kSPS),  
and Low-power mode (8mW/Ch at 10kSPS).  
I/O Supply: 1.8V to 3.3V  
Digital Core Supply: 1.8V  
A
SYNC input control pin allows the device  
conversions to be started and synchronized to an  
external event. SPI and Frame-Sync serial interfaces  
are supported. The device is fully specified over the  
extended industrial range (–40°C to +105°C) and is  
available in an HTQFP-64 PowerPAD™ package.  
APPLICATIONS  
•
•
•
•
3-Phase Power Monitors  
Defibrillators and ECG Monitors  
Coriolis Flow Meters  
Vibration/Modal Analysis  
VREFP VREFN AVDD DVDD  
IOVDD  
VREFP VREFN AVDD  
DVDD  
IOVDD  
DS  
DS  
DS  
DS  
Input1  
Input2  
Input3  
Input4  
Input1  
Input2  
Input3  
Input4  
Input5  
Input6  
Input7  
Input8  
SPI  
and  
SPI  
and  
DRDY/FSYNC  
SCLK  
DRDY/FSYNC  
SCLK  
DS  
DS  
DS  
Frame-  
Sync  
Frame-  
Sync  
DOUT[4:1]  
DIN  
DOUT[8:1]  
DIN  
Interface  
Interface  
Four  
Digital  
Filters  
DS  
Eight  
Digital  
Filters  
TEST[1:0]  
FORMAT[2:0]  
CLK  
TEST[1:0]  
FORMAT[2:0]  
CLK  
DS  
Control  
Logic  
Control  
Logic  
DS  
DS  
DS  
SYNC  
SYNC  
PWDN[4:1]  
CLKDIV  
MODE  
PWDN[8:1]  
CLKDIV  
MODE  
AGND  
DGND  
AGND  
DGND  
ADS1174  
ADS1178  
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
3
4
PowerPAD is a trademark of Texas Instruments.  
SPI is a trademark of Motorola, Inc.  
All other trademarks are the property of their respective owners.  
PRODUCT PREVIEW information concerns products in the  
formative or design phase of development. Characteristic data and  
other specifications are design goals. Texas Instruments reserves  
the right to change or discontinue these products without notice.  
Copyright © 2007, Texas Instruments Incorporated  
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ADS1174 替代型号

型号 品牌 替代类型 描述 数据表
ADS1274 TI

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 Quad/Octal, Simultaneous Sampling, 24-Bit Analog-to-Digital Converters
ADS1178 TI

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 Quad/Octal, Simultaneous Sampling, 16-Bit Analog-to-Digital Converters

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