參數(shù)資料
型號: MAX4397SACTM+T
廠商: Maxim Integrated Products
文件頁數(shù): 6/30頁
文件大小: 0K
描述: IC SW A/V SCART CON 48-TQFN
產(chǎn)品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 2,500
類型: 開關(guān)
應用: DVD,機頂盒,電視
安裝類型: 表面貼裝
封裝/外殼: 48-WFQFN 裸露焊盤
供應商設備封裝: 48-TQFN-EP(7x7)
包裝: 帶卷 (TR)
MAX4397DA/SA
Audio Outputs
Both right and left channels have a stereo output for the
TV and VCR SCART. The monaural output, which is a
mix of the TV right and left channels, drives the RF
modulator, RF_MONO_OUT. The monaural mixer, a
resistor summer, attenuates the amplitude of each of
the two signals by 6dB. A 12.54dB gain block follows
the monaural mixer. If the left and right audio channels
were completely uncorrelated, then a 9.54dB gain
block is used. See Figures 4 and 5 for the functional
diagram of the audio section.
Clickless Switching
The TV channel incorporates a zero-crossing detect
(ZCD) circuit that minimizes click noise due to abrupt
signal level changes that occur when switching
between audio signals at an arbitrary moment.
Audio/Video Switch for Dual SCART Connectors
14
______________________________________________________________________________________
ENC_INL+
AUDIO INPUTS
AUDIO OUTPUTS
ENC_INL-
TV_INL
VCR_INL
DIFF/SE
MUTE
Σ/2
MUTE
MUTE IS AN INTERNAL SIGNAL
-6dB, 0dB, OR +6dB
9.54dB
12.54dB
GNDAUD
9.54dB
ZCD
TV_OUTL
RF_MONO_OUT
TV_OUTR
VOLUME CONTROL BYPASS
VOLUME CONTROL
+6dB TO -56dB
VOLUME CONTROL
+6dB TO -56dB
I2C
VCR_OUTL
VCR_OUTR
9.54dB
ENC_INR+
ENC_INR-
TV_INR
VCR_INR
VOLUME CONTROL BYPASS
Figure 4. MAX4397DA Audio Section Functional Diagram
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