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模数转换器ADS1282数据手册

更新时间：2019-12-26 15:33:19 大小：2M 上传用户：sanghk查看TA发布的资源 标签：ads1282模数转换器 下载积分：2分 评价赚积分 （如何评价?） 打赏 收藏 评论(0) 举报

资料介绍

ADS1282目前第一款32bit AD.

ADS1282 High-Resolution Analog-To-Digital Converter

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文件名 大小
ads1282_2015.pdf 2M

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SBAS418I –SEPTEMBER 2007–REVISED MARCH 2015  
ADS1282 High-Resolution Analog-To-Digital Converter  
1 Features  
3 Description  
The ADS1282 is an extremely high-performance,  
single-chip analog-to-digital converter (ADC) with an  
integrated, low-noise programmable gain amplifier  
(PGA) and two-channel input multiplexer (mux). The  
ADS1282 is suitable for the demanding needs of  
1
•
High Resolution:  
130-dB SNR (250 SPS)  
•
High Accuracy:  
THD: –122 dB  
INL: 0.5 ppm  
energy  
exploration  
and  
seismic  
monitoring  
environments.  
•
•
•
Low-Noise PGA  
Two-Channel Input Mux  
The converter uses a fourth-order, inherently stable,  
delta-sigma (ΔΣ) modulator that provides outstanding  
noise and linearity performance. The modulator is  
used either in conjunction with the on-chip digital  
filter, or can be bypassed for use with post  
processing filters.  
Inherently-Stable Modulator with Fast Responding  
Overrange Detection  
•
Flexible Digital Filter:  
Sinc + FIR + IIR (Selectable)  
Linear or Minimum Phase Response  
Programmable High-Pass Filter  
Selectable FIR Data Rates: 250 SPS to 4 kSPS  
The flexible input MUX provides an additional  
external input for measurement, as well as internal  
self-test connections. The PGA features outstanding  
low noise (5 nV/√Hz) and high input impedance,  
allowing easy interfacing to geophones and  
hydrophones over a wide range of gains.  
•
•
Filter Bypass Option  
Low Power Consumption: 25 mW  
Shutdown: 10 μW  
•
•
•
Offset and Gain Calibration Engine  
SYNC Input  
The digital filter provides selectable data rates from  
250 to 4000 samples per second (SPS). The high-  
pass filter (HPF) features an adjustable corner  
frequency. On-chip gain and offset scaling registers  
support system calibration.  
Analog Supply:  
Unipolar (+5 V) or Bipolar (±2.5 V)  
•
Digital Supply: 1.8 V to 3.3 V  
The synchronization input (SYNC) can be used to  
synchronize the conversions of multiple ADS1282s.  
The SYNC input also accepts a clock input for  
continuous alignment of conversions from an external  
2 Applications  
•
•
•
Energy Exploration  
同步引脚对数据滤波器和调制器复位，使多个ADS１２８２通过一个  
source.  
Seismic Monitoring  
外部事件同步转换。同步引脚支持连续切换，通过接收一个外部时钟锁定  
转换率.  
High-Accuracy Instrumentation  
Together, the amplifier, modulator, and filter dissipate  
25 mW. The ADS1282 is available in a compact  
TSSOP-28 package and is fully specified from –40°C  
to +85°C, with a maximum operating range to  
+125°C.  
AVDD  
PGA  
VREFN VREFP  
DVDD  
CLK  
ADS1282  
SCLK  
DOUT  
DIN  
Input 1  
4th-Order  
DS  
Programmable  
Digital Filter  
SPI  
Calibration  
Interface  
Input 2  
Modulator  
DRDY  
VCOM  
Over-Range  
SYNC  
RESET  
PWDN  
Control  
Modulator Output  
3
AVSS  
DGND  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
SBAS418I –SEPTEMBER 2007–REVISED MARCH 2015  
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with  
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.  
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more  
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.  
4 Ordering Information  
For the most current package and ordering information, see the Package Option Addendum at the end of this  
document, or visit the device product folder at .  
5 Specifications  
5.1 Absolute Maximum Ratings(1)  
Over operating free-air temperature range (unless otherwise noted).  
ADS1282, ADS1282H  
–0.3 to +5.5  
UNIT  
V
AVDD to AVSS  
AVSS to DGND  
–2.8 to +0.3  
V
DVDD to DGND  
–0.3 to +3.9  
V
Input current  
100, momentary  
10, continuous  
AVSS – 0.3 to AVDD + 0.3  
–0.3 to DVDD + 0.3  
+150  
mA  
mA  
V
Input current  
Analog input voltage  
Digital input voltage to DGND  
Maximum junction temperature  
Operating temperature range  
Storage temperature range  
V
°C  
°C  
°C  
–40 to +125  
–60 to +150  
(1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may  
degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond  
those specified is not implied.  
2
Copyright © 2007–2015, Texas Instruments Incorporated  
Product Folder Links:

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