AK4708.pdf 데이터시트 (총 30 페이지) - 파일 다운로드 AK4708 데이타시트 다운로드

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[AK4708]
www.DataSheet4U.com
AK4708
AV SCART Switch with Two RGB Outputs
GENERAL DESCRIPTION
The AK4708 is an IIC controlled audio and video switch matrix designed for digital TV and set-top-box
applications. The AK4708 offers the ideal features for digital set-top-box systems. The AK4708 includes
the audio switches, video switches, video filters. The AK4708 provides high performance audio and video
routings to meet dual SCART connections. The AK4708 is supplied in a small 48-pin LQFP package to
contribute space saving in PCB.
FEATURES
†Analog Switches for SCART
Audio section
THD+N: 86dB (@2Vrms)
Dynamic Range: 96dB (@2Vrms)
Analog Inputs
Two Full Differential Stereo Inputs or Single-ended input for Decoder DAC
Two Stereo Inputs (TV & VCR SCART)
Analog Outputs
Two Stereo Outputs (TV & VCR SCART)
Stereo Analog Volume with Pop-noise Free Circuit (+6dB to –60dB & Mute)
Pop Noise Free Circuit for Power on/off
Video section
VCR SCART supports RGB mode
Integrated LPF: 40dB@27MHz
75Ω driver
6dB Gain for Outputs
Four CVBS/Y inputs (ENCx2, TV, VCR), Two CVBS/Y outputs (TV, VCR)
Three R/C inputs (ENCx2, VCR), Two R/C outputs (TV, VCR)
Two G and B inputs (ENC, VCR), Two G and B outputs (TV, VCR)
TV/VCR input monitor
Loop-through Mode for standby
Auto-Startup Mode for power saving
SCART pin#16 (Fast Blanking), pin#8 (Slow Blanking) Control
†Power supply
5V+/5% and 12V+/10%
Small current consumption in Standby Mode
(VD=10μA typ., VVD1+VVD2=10μA typ., VP=10μA typ.)
†Package
48-pin LQFP
MS0618-E-00
-1-
2007/04

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Block Diagram
DVCOM
AINL+
AINL-
AINR-
AINR+
-6dB to +12dB
(3dB/step)
AMP
Volume #0
VCRINL
VCRINR
TVINL
TVINR
SCL
SDA
PDN
Register
Control
[AK4708]
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+6 to -60dB
(2dB/step)
TV1-0
Volume #1
Bias
VCR1-0
Audio Block
MONO
VMONO
TVOUTL
TVOUTR
PVCOM
VD
VP
VCROUTL
VCROUTR
VSS
MS0618-E-00
-2-
2007/04

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( Typical connection )
VVD1
VVD2
VVSS
ENC CVBS/Y
ENC Y
VCR CVBS/Y
TV CVBS
ENC R/C/Pr
ENC C
VCR R/C/Pr
ENCV
ENCY
VCRVIN
TVVIN
ENCRC
ENCC
VCRRC
ENC G/CVBS
VCR G
ENC B/Pb
VCR B/Pb
ENCG
VCRG
ENCB
VCRB
Monitor
6dB
6dB
6dB
6dB
6dB
6dB
6dB
6dB
Video Block
[AK4708]
www.DataSheet4U.com
( Typical connection )
TVVOUT
TVRC
TVG
TVB
TV SCART
VCRVOUT
VCRC
VCR SCART
VCRGO
VCRBO
MS0618-E-00
-3-
2007/04

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( Typical connection )
VCR FB
VCRFB
2V
0V
0/ 6/ 12V
6dB
0/ 6/ 12V
2V
0V
Monitor
6dB
Video Blanking Block
[AK4708]
www.DataSheet4U.com
( Typical connection )
TVFB
TVSB
VCRSB
INT
VCRFBO
TV SCART
VCR SCART
MS0618-E-00
-4-
2007/04

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Ordering Guide
AK4708EQ
AKD4708
Pin Layout
-10 +70°C
48pin LQFP (0.5mm pitch)
Evaluation board for AK4708
[AK4708]
www.DataSheet4U.com
AINR-
AINR+
AINL-
AINL+
SCL
SDA
PDN
VCRBO
VCRGO
VCRFBO
VCRVOUT
TVFB
37
38
39
40
41
42
43
44
45
46
47
48
AK4708
Top View
24 VCRINR
23 TVSB
22 VCRSB
21 INT
20 VCRB
19 VCRG
18 VCRRC
17 VCRFB
16 VCRVIN
15 TVVIN
14 ENCY
13 ENCV
MS0618-E-00
-5-
2007/04