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PGA281 参数 Datasheet PDF下载

PGA281图片预览
型号: PGA281
PDF下载: 下载PDF文件 查看货源
内容描述: 精密,零漂移,高电压,可编程增益仪表放大器 [Precision, Zero-Drift, High-Voltage, Programmable Gain Instrumentation Amplifier]
分类和应用: 仪表放大器
文件页数/大小: 32 页 / 2049 K
品牌: TI [ TEXAS INSTRUMENTS ]
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PGA281  
www.ti.com  
SBOS664A MARCH 2013REVISED JUNE 2013  
SAR ADC Driver  
An example of the PGA281 used as a SAR ADC driver with the THS4031 used as input buffers to maximize  
SNR and THD is shown in Figure 50 .  
Buffering  
RC  
Low-Pass  
Filter  
ADC-Side  
Filtering  
RB  
RA  
RA  
THS4031  
+
+
VOP  
ADS8318  
SAR ADC  
CD  
PGA281 VOCM  
CA  
RB  
VON  
+
THS4031  
RC  
Figure 50. SAR Driver with Input Buffer  
Using TINA-TI™ SPICE-Based Analog Simulation Program with the PGA281  
TINA is a simple, powerful, and easy-to-use circuit simulation program based on a SPICE engine. TINA-TI is a  
free, fully functional version of the TINA software, preloaded with a library of macromodels in addition to a range  
of both passive and active models. It provides all the conventional dc, transient, and frequency-domain analysis  
of SPICE, as well as additional design capabilities.  
Available as a free download from the Analog eLab Design Center, TINA-TI offers extensive post-processing  
capability that allows users to format results in a variety of ways.  
Virtual instruments offer users the ability to select input waveforms and probe circuit nodes, voltages, and  
waveforms, creating a dynamic quick-start tool.  
NOTE  
NOTE: These files require that either the TINA software (from DesignSoft) or TINA-TI  
software be installed. Download the free TINA-TI software from the TINA-TI folder.  
Two-Terminal Programmable Logic Controller  
The circuit in Figure 51 is used to convert inputs of ±10 V, ±5 V, or ±20 mA to an output voltage range from 0 V  
to 5 V. The input selection depends on the settings of the switch and the PGA281 gain. Further explanation, as  
well as the TINA-TI simulation circuit, is provided in the compressed file that can be downloaded at the following  
link: PGA281 PLC Circuit.  
±10 V, ±5 V,  
or ±20 mA  
+
VOP  
2.5 V  
VOCM  
PGA281  
VON  
250  
µC  
Figure 51. Two-Terminal, Programmable Logic Controller (PLC) Input  
Copyright © 2013, Texas Instruments Incorporated  
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Product Folder Links: PGA281  
 
 
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