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A2TPMI334L5.5GXXOCA 参数 Datasheet PDF下载

A2TPMI334L5.5GXXOCA图片预览
型号: A2TPMI334L5.5GXXOCA
PDF下载: 下载PDF文件 查看货源
内容描述: 热电堆集成信号处理电路 [Thermopile with integrated signal processing circuit]
分类和应用:
文件页数/大小: 21 页 / 317 K
品牌: PERKINELMER [ PERKINELMER OPTOELECTRONICS ]
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Datasheet A2TPMI  
OUTPUT SIGNAL  
The A2TPMI amplifiers are realized in chopper amplifier technology. Due to the nature of this technol-  
ogy the output signals VTobj and VTamb incorporate an AC signal of approximately 10 mV peak to peak in  
the range of 250 kHz. This AC voltage can be suppressed either by an electrical low pass filter or via an  
additional software filtering.  
In applications with low resistive load ( > 1Mohm) a simple RC low pass filter as follows can be used to  
smooth the signal:  
500 Ohms  
A2TPMI  
VTobj or VTamb  
VTobj or VTamb filtered  
L1 Option  
³470 nF  
In applications with high resistive load (50kOhm … 1MOhm) filtering can be achieved with the following  
circuit. A rail to rail OPAmp like the LMV358 should be used so that the full sensing range will be avail-  
able on the output of the filter circuit.  
C
L2 Option  
LMV358  
R
R
A2TPMI  
VTobj or VTamb  
+
VTobj or VTamb filtered  
-
C
R = 10kOhms  
C = 100nF  
PRINTED CIRCUIT BOARD (PCB) VERSION  
Two different sizes of standard PCB versions are available. P1 version is a 17 x 34 mm2 PCB which  
allows assembly of additional external mirror optics (M options). P3 version is 17 x 20 mm2 PCB suit-  
able for applications with restricted space. P3 version is not available with mirror (M option).  
Each PCB version is available either as plain version (sensor directly wired to connector), or with 1st  
order (RC-circuit, L1 option) or 2nd order (active OpAmp circuit, L2 option) low pass filter, in order to  
provide attenuation of the AC portion on the output signal as described in chapter Output Signal.  
A2TPMI Datasheet Rev4  
Page 12 of 21  
Rev. Oct 2003  
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