AK4712 Ver la hoja de datos (PDF) - Asahi Kasei Microdevices
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AK4712 Datasheet PDF : 30 Pages
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[AK4712]
ANALOG CHARACTERISTICS (SD VIDEO)
(Ta = 25°C; VD1=VD2= VVD= 3.3V; unless otherwise specified.)
Parameter
Conditions
min typ max Unit
External Resistance
35
1000 Ω
External Capacitance
0.05 0.1 0.2 μF
Gain
Frequency Response
Pedestal Level
Group Delay Distortion
(Note 19)
Input = 0.3Vp-p, 100kHz
5.5 6 6.5 dB
Input=0.3Vp-p, C1=C2=0pF. 100kHz to 6MHz. -1.0
0.5 dB
at 10MHz.
-3
dB
at 27MHz.
-40 -25 dB
Video Input
-100
0
100
mV
At 4.43MHz with respect to 1MHz.
20
ns
Input Impedance (Note 20) Chrominance input (internally biased)
80 100 -
kΩ
Input Signal
f = 100kHz, maximum with distortion < 1.0%,
gain = 6dB.
-
- 1.25 Vpp
Load Resistance
(Figure 1)
- 150 -
Ω
Load Capacitance
C1 (Figure 1)
400 pF
C2 (Figure 1)
15
pF
Dynamic Output Signal
f = 100kHz, maximum with distortion < 1.0%
-
-
2.5 Vpp
Y/C Crosstalk (Note 20)
f = 4.43MHz, 1Vp-p input. Among HDY and
ENCPB outputs.
-
-50
-
dB
S/N
Reference Level = 0.7Vp-p, CCIR 567 weighting.
BW = 15kHz to 5MHz.
-
74
-
dB
Differential Gain
0.7Vpp 5steps modulated staircase.
chrominance &burst are 280mVpp, 4.43MHz.
-
1.3
-
%
Differential Phase
0.7Vpp 5steps modulated staircase.
chrominance &burst are 280mVpp, 4.43MHz.
-
1.4
- Degree
Power Supply Rejection (PSRR)
(Note 21) -
45
dB
Note 19 HDY/HDPB/HDPR Group Delay Distortion when FL1-0 bits= “00”
Note 20. When CLAMP2 bit = “0”, CLAMP1 bit = “1” for Y/C, Y signal is input to the ENCY pin and C signal is input
to the ENCPB pin.
Note 21. The PSRR is applied to VD1 and VD2 and VVD and with 100kHz, 100mV.
.
R1
75 ohm
Video Signal Output
R2
C2
C1
75 ohm
max: 15pF
max: 400pF
Figure 1. Load Resistance R1+R2 and Load Capacitance C1/C2.
MS1509-E-00
-9-
2013/01
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