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参数资料
| 型号： | UDA1380TT |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 消费家电 |
| 英文描述： | Stereo audio coder-decoder for MD, CD and MP3 |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO32 |
| 封装： | 6.10 MM, 0.65 MM PITCH, PLASTIC, MO-153, SOT-487-1, TSSOP-32 |
| 文件页数： | 5/68页 |
| 文件大小： | 426K |
| 代理商： | UDA1380TT |
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2004 Apr 22
13
NXP Semiconductors
Product specification
Stereo audio coder-decoder
for MD, CD and MP3
UDA1380
8.2
ADC analog front-end
The analog front-end of the UDA1380 consists of one
stereo ADC with a selector in front of it (see Fig.6). Using
this selector one can either select the microphone input
with the microphone amplifier (LNA) with a fixed 29 dB
gain and VGA (no PGA, since a real microphone amplifier
is much better with respect to noise), or the line input which
has a PGA for having 0 or 6 dB gain (for supporting 1 and
2 V (RMS) input). The PGA also provides gain control from
0to24dB in steps of 3dB.
Remark:
The input impedance of the PGA (line input) is 12 kΩ, for
the LNA this is 5 k
Ω
8.2.1
APPLICATIONS AND POWER-DOWN MODES
The following Power-down modes and functional modes
are supported:
Power-down mode in which the power consumption is
very low (only leakage currents)
In this mode there is no reference voltage at the line
input
Line input mode, in which the PGA can be used
Microphone mode, in which the rest of the non-used
PGAs and ADCs are powered-down
Mixed PGA and LNA mode: one line input and one
microphone input.
More information on the analog frond-end is given in
Section 8.11.1.
handbook, full pagewidth
PGA
ADC
SDC
MGU530
PGA
31
(27)
(29)
(31)
VINL
1
VINR
3
VINM
SDC
LNA
SDC
SEL_MIC
bitstream
right
bitstream
left
SEL_LNA
Fig.6 Analog front-end.
Pin numbers for UDA1380HN in parentheses.
8.2.2
LNA WITH VGA
The LNA is equipped with a VGA. The function of the VGA
is to have additional variable analog gain from 0 to 30 dB
in steps of 2 dB. This provides more flexibility in the choice
of the microphone.
8.2.3
APPLICATIONS WITH 2V (RMS) INPUT
For the line input it is preferable to have 0 dB and 6 dB gain
settings in order to be able to apply both 1 and 2 V (RMS)
input signals, using a series resistance. For this purpose a
PGA is used which has 0 to 24 dB gain, in steps of 3 dB.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| UDA1380TT/N2 | 制造商:PHILIP 功能描述: |
| UDA1380TT/N2,512 | 功能描述:接口—CODEC SSA CODEC RoHS:否 制造商:Texas Instruments 类型: 分辨率: 转换速率:48 kSPs 接口类型:I2C ADC 数量:2 DAC 数量:4 工作电源电压:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-81 封装:Reel |
| UDA1380TT/N2,518 | 功能描述:接口—CODEC SSA CODEC RoHS:否 制造商:Texas Instruments 类型: 分辨率: 转换速率:48 kSPs 接口类型:I2C ADC 数量:2 DAC 数量:4 工作电源电压:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-81 封装:Reel |
| UDA1380TT-T | 功能描述:接口—CODEC SSA CODEC RoHS:否 制造商:Texas Instruments 类型: 分辨率: 转换速率:48 kSPs 接口类型:I2C ADC 数量:2 DAC 数量:4 工作电源电压:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-81 封装:Reel |
| UDA1384 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Multichannel audio coder-decoder |
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