AK4254 Datasheet, PDF (6/22 Pages) Asahi Kasei Microsystems – Capacitor-less Video Amp with 7:2 Video Switch

ASAHI KASEI
[AK4254]
ANALOG CHARACTERISTICS
(Ta = 25°C; AVDD=CVDD1=CVDD2=3.0V; unless otherwise specified. Note: 5, Note: 6)
Parameter
Conditions
min typ
Gain
Input=0.3Vp-p, 100kHz
5.3
6
Frequency Response
Input=0.3Vpp, Sin Wave
(0dB at 100kHz)
Response at 6MHz
Response at 27MHz
-2.0
-40
Group Delay Distortion
|GD3MHz - GD6MHz|
10
Dynamic Output Signal
f=100kHz, maximum with distortion < 1.0%. 2.52
Inter channel Isolation
f=4.43MHz, 1Vp-p input
-
65
S/N
Reference Level = 0.7Vp-p,
-
65
BW= 100kHz to 6MHz.
Differential Gain
0.7Vpp 5steps modulated staircase.
-
+0.4
Chrominance & burst are 280mVpp, 4.43MHz.
Differential Phase
0.7Vpp 5steps modulated staircase.
-
+2.5
Chrominance & burst are 280mVpp, 4.43MHz.
Load Resistance
R1+R2 (Note: 9)
140 150
Load Capacitance
C1 (Note: 9)
C2 (Note: 9)
Power Supply Current
Normal Operation
AVDD+CVDD1+CVDD2
20
(PDN pin = “H”, Note: 7)
Power-Down Mode
AVDD+CVDD1+CVDD2
10
(PDN pin = “L”, Note: 8)
max Units
6.7
dB
+2.0 dB
-20
dB
100
ns
Vpp
-
dB
-
dB
-
%
- Degree
-
Ω
400
pF
15
pF
30
mA
100 μA
Note: 5. Video analog characteristics are measured at the pin directly.
Note: 6. Input Sync Tip Level=-0.43V∼-0.14V (It is the difference with Pedestal Level and Sync Tip Level.)
Horizontal Line Sync Pulse=4.0μs ∼5.4μs, Equalizing Pulse=2.0μs ∼2.7μs, Serration Pulse=4.0μs ∼5.4μs
Note: 7. VIN Black level input, no load
Note: 8. All digital input pins (P/S, I2C/SEL22, CDTI/SDA/SEL21, CCLK/SCL/SEL20, SN/SEL12, CAD1/SEL11,
CAD0/SEL10) are held at AVSS.
Note: 9. Refer to the Figure 2.
R1
75 Ω
VOUT
C2
C1
R2
75 Ω
max: 15pF
(C2)
max: 400pF
(C1)
Figure 2. Load Resistance R1+R2 and Load Capacitance C1/C2
MS0586-E-01
-6-
2007/08