參數(shù)資料
型號(hào)： LM4550VH
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 消費(fèi)家電
英文描述： AC ’97 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample Rate Conversion and National 3D Sound
中文描述： SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝： 7 X 7 X 1.40 MM, LQFP-48
文件頁(yè)數(shù)： 10/25頁(yè)
文件大?。?/td> 507K
代理商： LM4550VH
Pin Descriptions
(Continued)
ANALOG I/O
(Continued)
Name
Pin
I / O
Functional Description
This line level input can be routed through the Input Mux and recorded by the right ADC. In
addition, this analog input gets summed into the right output stream. The amount of VIDEO_R
signal mixed in the right output stream can be adjusted from +12dB to 34.5dB in 1.5dB
steps as well as muted via register 14h.
This line level input can be routed through the Input Mux and recorded by the left ADC. In
addition, this analog input gets summed into the left output stream. The amount of CD_L
signal mixed in the left output stream can be adjusted from +12dB to 34.5dB in 1.5dB steps
as well as muted via register 12h.
This input can be used to reject common mode signals on the CD_L and CD_R inputs.
CD_GND is an AC ground point and not a DC ground point. This input must be AC-coupled
to the source signal’s ground.
This line level input can be routed through the Input Mux and recorded by the right ADC. In
addition, this analog input gets summed into the right output stream. The amount of CD_R
signal mixed in the right output stream can be adjusted from +12dB to 34.5dB in 1.5dB
steps as well as muted via register 12h.
Either MIC1 or MIC2 can be selected via software and routed through the Input Mux for
recording. The 20dB boost circuit is enabled/disabled via register 0Eh. Also, the amount of
mic signal mixed in the output stream can be adjusted from +12dB to 34.5dB in 1.5dB steps
as well as muted via register 0Eh.
Either MIC1 or MIC2 can be selected via software and routed through the Input Mux for
recording. The 20dB boost circuit is enabled/disabled via register 0Eh. Also, the amount of
mic signal mixed in the output stream can be adjusted from +12dB to 34.5dB in 1.5dB steps
as well as muted via register 0Eh.
This line level input can be routed through the Input Mux and recorded by the left ADC. In
addition, this analog input gets summed into the left output stream. The amount of LINE_IN_L
signal mixed in the left output stream can be adjusted from +12dB to 34.5dB in 1.5dB steps
as well as muted via register 10h.
This line level input can be routed through the Input Mux and recorded by the right ADC. In
addition, this analog input gets summed into the right output stream. The amount of
LINE_IN_R signal mixed in the right output stream can be adjusted from +12dB to 34.5dB in
1.5dB steps as well as muted via register 10h.
This is a post-mixed output for the left audio channel. The level of this output can be adjusted
from 0dB to 45dB in 1.5dB steps as well as muted via register 02h.
This is a post-mixed output for the right audio channel. The level of this output can be
adjusted from 0dB to 45dB in 1.5dB steps as well as muted via register 02h.
This line level output is either the post-mixed output or the mic input. The level of this output
can be adjusted from 0dB to 45dB in 1.5dB steps as well as muted via register 06h.
This is a post-mixed output for the left audio channel. The level of this output can be adjusted
from 0dB to 45dB in 1.5dB steps as well as muted via register 04h. HP_OUT_L has a
nominal gain of 3dB with respect to the left output mixer level and is designed for driving a
32
impedance with minimal distortion.
This input can be used to reject common mode signals on the headphone outputs.
HP_OUT_C is an AC ground point not DC ground point. Thus, this input must be capacitively
coupled (not directly coupled) to analog ground.
This is a post-mixed output for the left audio channel. The level of this output can be adjusted
from 0dB to 45dB in 1.5dB steps as well as muted via register 04h. HP_OUT_L has a
nominal gain of 3dB with respect to the left output mixer level and is designed for driving a
32
impedance with minimal distortion.
VIDEO_R
17
I
CD_L
18
I
CD_GND
19
I
CD_R
20
I
MIC1
21
I
MIC2
22
I
LINE_IN_L
23
I
LINE_IN_R
24
I
LINE_OUT_L
35
O
LINE_OUT_R
36
O
MONO_OUT
37
O
HP_OUT_L
39
O
HP_OUT_C
40
I
HP_OUT_R
41
O
L
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相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM4550VH WAF 制造商:Texas Instruments 功能描述:
LM4550VH/NOPB 功能描述:IC AC '97 CODEC 48-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標(biāo)準(zhǔn) ADC / DAC (db):81.5 / 88 動(dòng)態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR)
LM4550VHX 制造商:Rochester Electronics LLC 功能描述:AC '97 REV 2.1 CODEC - Bulk
LM4550VHX/NOPB 制造商:Texas Instruments 功能描述:Audio Codec 2ADC / 2DAC 18-Bit 48-Pin LQFP T/R
LM4558 制造商:HTC 制造商全稱:HTC Korea TAEJIN Technology Co. 功能描述:DUAL OPERATIONAL AMPLIFIERS
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