參數(shù)資料
型號(hào)： UDA1380
英文描述： Stereo audio coder-decoder for MD, CD and MP3
中文描述： 立體聲音頻編碼器，可用于MD，CD和MP3解碼器
文件頁數(shù)： 19/68頁
文件大小： 278K
代理商： UDA1380
2002 Sep 16
19
Philips Semiconductors
Product specification
Stereo audio coder-decoder
for MD, CD and MP3
UDA1380
8.11.1
A
NALOG FRONT
-
END
Figure 12 shows the power control inside the analog front-end. The control of all power-on pins of the ADC front-end is
done via separate L3-bus or I
2
C-bus bits.
handbook, full pagewidth
PGA
PGA_GAINCTRLR
PGA_GAINCTRLL
ADC
bitstream
right
ADC
SDC
bitstream
left
MGU534
PGA
VINL
VINR
VINM
SDC
LNA
SDC
PON_PGAL
PON_ADCL
PON_BIAS
FE
BIAS
VREF
PON_PGAR
PON_ADCR
PON_LNA
31
(27)
(29)
(31)
1
3
Fig.12 Analog front-end power-down.
Pin numbers for UDA1380HN in parentheses.
8.11.2
FSDAC
POWER CONTROL
The FSDAC block has power-on pins: one of which shuts
down the DAC itself, but leaves the output still at V
REF
voltage (which is half the power supply). This function is
set by the bit PON_DAC in the L3-bus or I
2
C-bus register.
A second L3-bus or I
2
C-bus bit shuts down the complete
bias circuit of the FSDAC, via bit PON_BIAS in the
L3-bus or I
2
C-bus register. This bit PON_BIAS acts the
same as given in Fig.12 for the analog front-end.
8.12
Plop prevention
Plops are ticks and other strange sounds, that can occur
when a part of a device is powered-up or powered-down,
or when switching between modes is done.
Some ways to prevent plops from occurring are:
When the FSDAC or headphone driver must be
powered-down, first a digital mute is applied. After that
the FSDAC or headphone driver can be powered-down.
In case the FSDAC or headphone driver must be
powered-up,firsttheanalogpartisswitchedon,thenthe
digital part is demuted
When the ADC must be powered-down, a digital mute
sequence must be applied. When the digital output
signal is completely muted, the ADC can be
powered-down. In case the ADC must be powered-up,
firsttheanalogpart mustbepowered-up, thenthedigital
part must be demuted
When there is a change of for example clock divider
settings or clock source (selecting between SYSCLK
and WSPLL clock), then also digital mute for that block
(either decimator or interpolator) should be used.
Remark
: All items mentioned in Section 8.12 are not
‘hard-wired’ implemented, but to be followed by the users
as a guideline for plop prevention.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UDA1380HN 制造商:ICS 制造商全稱:ICS 功能描述:Stereo audio coder-decoder for MD, CD and MP3
UDA1380HN/N2 制造商:NXP Semiconductors 功能描述:IC CODEC AUDIO MINIDISC 32HVQFN 制造商:NXP Semiconductors 功能描述:IC, CODEC, AUDIO, MINIDISC, 32HVQFN
UDA1380HN/N2,118 功能描述:接口—CODEC STEREO AUDIO RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
UDA1380HN-T 功能描述:接口—CODEC STEREO AUDIO CODER-DECODER RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
UDA1380TT 功能描述:接口—CODEC SSA CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
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