参数资料
型号: AFE7222EVM
厂商: Texas Instruments
文件页数: 81/106页
文件大小: 0K
描述: EVAL MODULE FOR AFE7222
标准包装: 1
主要目的: 接口,模拟前端(AFE)
嵌入式:
已用 IC / 零件: AFE7222
已供物品:
其它名称: 296-30300
AFE7222EVM-ND
20
0
-20
-40
-60
-80
-100
-120
-140
-160
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Normalized Frequency
Frequency Response of Interpolation Filter 1
Frequency
Response(dB)
0
0.2
0.4
0.6
0.8
1
Normalized Frequency
0
-100
Individual and Composite Responses of Interpolation Filters
1.2
1.4
1.6
1.8
2
50
-50
-150
-200
Frequency
Response(dB)
SLOS711B – NOVEMBER 2011 – REVISED MARCH 2012
Figure 9-9. Interpolation Filter 1 freq Response (from 0 to FDACCLK/2) (2X Interpolation mode)
TXFIR2 is a 19 tap half-band filter. The transition band is from 0.27 to 0.75 of FCLKFIR2/2, and the stop
band attenuation is 70dB. Pass band ripple is less than 0.1dB. It has the following coefficients (listed only
up to the middle one).
TXFIR2 (interpolation filter 2)
coefficients = [11 0 –64 0 224 0 –648 0 2525 4096]
Figure 9-10. Interpolation filters individual and composite responses – TXFIR1 response is shown in
blue, TXFIR2 response is in red, and the composite response is in green. (4X interpolation mode, from 0
to FDACCLK/2)
76
APPLICATION INFORMATION
Copyright 2011–2012, Texas Instruments Incorporated
Product Folder Link(s): AFE7222 AFE7225
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