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參數(shù)資料
| 型號： | MB86060PFV |
| 廠商： | Fujitsu Limited |
| 元件分類： | DAC |
| 英文描述： | 16-Bit Interpolating Digital to Analog Converter |
| 中文描述： | 16位插數(shù)模轉(zhuǎn)換器 |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 105K |
| 代理商： | MB86060PFV |
June 2000
Version 1.2
FME/MS/SFDAC1/FL_1/4270
MB86060
16-Bit Interpolating Digital to Analog Converter
Page 4 of 6
Copyright 2000 Fujitsu Microelectronics Europe GmbH
Other benefits include a reduced effect due to the sinx/x roll-off due to the DAC sample and hold output
stage, which for a conventional DAC represents -4dB at Nyquist, compared to only -0.22dB when operating
in the x4 interpolating mode. Also the digital interpolation filters sharp cutoff and effective stop-band
attentuation improves both in and out-of-band SFDR. This is illustrated below.
The MB86060 features four interpolation filter modes x1, x2(slow), x2(fast) and x4. Mode x1 is as per a
conventional DAC, and choosing between the remaining three modes would depend on the system
requirements. Mode x2(slow) may be advantageous to a system requiring the benefits of interpolation
filtering but saving some power by not running the DAC core at full rate. Mode x2(fast) gives access to the
wider band, slower roll-off interpolation filter allowing wider band signals to be generated compared to the
other modes, for example 74MHz (-0.1dB) for 200MSa/s data rate. Mode x4 for the complete interpolation
filter operation.
-4dB
-13dB
-18dB
-0.22dB
Sinx
x
Sinx
x
x1
mode
-0.9dB
-13dB
Sinx
x
-0.9dB
Sinx
x
0 100 200 300 400 500 MHz
F
DAT
F
DAC
Filter Pass Band = 0.43.F
DAT
(-0.1dB)
x4
mode
X2 (slow)
mode
X2 (fast)
mode
0 100 200 300 400 500 MHz
F
DAT
F
DAC
0 100 200 300 400 500 MHz
F
DAT
F
DAC
0 100 200 300 400 500 MHz
F
DAT
& F
DAC
Filter Pass Band = 0.43.F
DAT
(-0.1dB)
Filter Pass Band = 0.37.F
DAT
(-0.1dB)
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