參數(shù)資料
型號(hào)： UCB1300BE
廠(chǎng)商： NXP SEMICONDUCTORS
元件分類(lèi)： 調(diào)制器/解調(diào)器
英文描述： Advanced modem/audio analog front-end
中文描述： MODEM-SUPPORT CIRCUIT, PQFP48
封裝： 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, SOT-313-2, LQFP-48
文件頁(yè)數(shù)： 9/56頁(yè)
文件大?。?/td> 1022K
代理商： UCB1300BE
1999 Jul 20
9
Philips Semiconductors
Preliminary specification
Advanced modem/audio analog front-end
UCB1300
The UCB1300 audio codec input path accepts microphone signals directly, only a DC blocking capacitor is needed since
the MICP input is biased around 1.4V. The ‘ground’ side of the microphone is either connected to the analog ground
(V
ssa1
) or to the MICGND pin. The latter will decrease the current consumption of active microphones, since the MICGND
pin is made Hi-Z when the audio codec input path is disabled.
The full scale input voltage of the audio input path is programmable in 1.5 dB steps by setting the appropriate number in
AUDIO_GAIN[n] in the audio control register A. Using very high gains may require the use of the internal offset
cancellation circuit programmable in reg 13 to avoid clipping in the ADC.
A clip detection circuit will inform the user whenever the input voltage exceeds the maximum input voltage, since this will
lead to a high distortion. In that case AUD_CLIP_STAT in the audio control register B is set. When ACLIP_RIS_INT is
set, an interrupt is generated on the IRQOUT pin on the rising edge of the clip detect signal. When ACLIP_FAL_INT is
set, an interrupt is generated on the falling edge of the clip detect signal.
The frequency response of the audio codec depends mainly on the selected sample rate, since the bandwidth is limited
in the down and up sampling filters. These digital filters both contain several FIR and IIR low pass filters and a DC
removal filter (high pass filter). A 3rd order smoothing filter is implemented in the DAC path, between DAC and speaker
driver stage to reduce the spurious frequencies at the speaker outputs.
Fig.4 Possible microphone connections.
PASSIVE
V
DDA1
1
7
21
MICP
MICGND
20
V
SSA1
18
ACTIVE
V
DDA1
1
7
21
MICP
MICGND
20
V
SSA1
18
UCB1300
UCB1300
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UCB1400 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Audio codec with touch screen controller and power management monitor
UCB1400BE 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Audio codec with touch screen controller and power management monitor
UCB1400BE,128 功能描述:接口—CODEC AUDIO CODEC WITH TOUCHSCREEN RoHS:否 制造商:Texas Instruments 類(lèi)型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類(lèi)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
UCB1400BE,151 功能描述:接口—CODEC AUDIO CODEC RoHS:否 制造商:Texas Instruments 類(lèi)型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類(lèi)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
UCB1400BE,157 功能描述:接口—CODEC DO NOT USE ORDER -S OR -T PART RoHS:否 制造商:Texas Instruments 類(lèi)型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類(lèi)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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