參數(shù)資料
型號(hào): EVAL-ADAU1701MINIZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 15/53頁(yè)
文件大小: 0K
描述: BOARD EVAL SIGMADSP AUD ADAU1701
標(biāo)準(zhǔn)包裝: 1
系列: SigmaDSP®
類型: DSP:音頻
適用于相關(guān)產(chǎn)品: ADAU1701
所含物品: 板,線纜
產(chǎn)品目錄頁(yè)面: 776 (CN2011-ZH PDF)
相關(guān)產(chǎn)品: ADAU1701JSTZ-RL-ND - IC AUDIO PROC 2ADC/4DAC 48-LQFP
ADAU1701JSTZ-ND - IC AUDIO PROC 2ADC/4DAC 48-LQFP
其它名稱: ADAU1701MINIBZ
ADAU1701MINIBZ-ND
ADAU1701MINIZ
ADAU1701MINIZ-ND
ADAU1701
Rev. B | Page 21 of 52
AUDIO DACs
The ADAU1701 includes four Σ-Δ DACs. The SNR of the DAC
is 104 dB, and the THD + N is 90 dB. A full-scale output on
the DACs is 0.9 V rms (2.5 V p-p).
The DACs are in an inverting configuration. If a signal inversion
from input to output is undesirable, it can be reversed either by
using an inverting configuration for the output filter or by simply
inverting the signal in the SigmaDSP program flow.
The DAC outputs can be filtered with either an active or a
passive reconstruction filter. A single-pole, passive, low-pass
filter with a 50 kHz corner frequency, as shown in Figure 18,
is sufficient to filter the DAC out-of-band noise, although an
active filter may provide better audio performance. Figure 19
shows a triple-pole, active, low-pass filter that provides a steeper
roll-off and better stop-band attenuation than the passive filter.
In this configuration, the V+ and V pins of the AD8606 op
amp are set to VDD and ground, respectively.
To properly initialize the DACs, Bits[DS<1:0>] in the DAC
setup register (Address 2087) should be set to 01.
47F
+
560
DAC_OUT
5.6nF
FILTER_OUT
064
12
-01
8
Figure 18. Passive DAC Output Filter
47F
+
604
DAC_OUT
49.9k
3.3nF
FILTER_OUT
4.75k
150pF
AD8606
C8
470F
+
0
64
12
-01
9
Figure 19. Active DAC Output Filter
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參數(shù)描述
EVAL-ADAU1701MINIZ 制造商:Analog Devices 功能描述:ADAU1701MINIZ EvaluationBoard
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