AK4250 Datasheet, PDF (4/8 Pages) Asahi Kasei Microsystems – Output Coupling Capacitor-less Video Amp with LPF

ASAHI KASEI
[AK4250]
ANALOG CHRACTERISTICS
(Ta=25°C; VDD =3.0V; VSS = 0V; unless otherwise specified)
Parameter
Conditions
min typ max Units
V Input Characteristics
Input Voltage
-
-
1.5 Vpp
Input Sync Chip Clamp Voltage (Note 3)
-0.386 -0.286 -0.186 V
V Output Characteristics (Note 4)
Output Gain
VIN=100kHz, 0.2Vpp
5.0
6.0
7.0
dB
Maximum output voltage
VIN=100kHz , THD=-30dB
2.52
-
-
Vpp
S/N
BW=100kH ∼ 6MHz, (Note 5)
-
65
-
dB
Secondary Distortion
VIN=3.58MHz, 0.2Vpp (Sin Wave)
-
-45
-
dB
Load Resistance
140 150
-
Ω
Load Capacitance
C1 (Figure 2)
-
-
15
pF
C2 (Figure 2)
-
-
400
pF
LPF
Frequency Response
Response at 6.75MHz
-3
-0.5
-
dB
Input= 0.2Vpp, Sin Wave
(0dB at 100kHz)
Response at 27MHz
-
-40
-20
dB
Group Delay
|GD3MHz - GD6MHz|
-
10
100 nsec
Power Supplies
Power Up
Black signal is output and no load -
10
15
mA
resistance.
Power Down
PDN pin = 0V
-
1
20
μA
Note 3. The Charge Pump circuit doesn’t work well, if the sync chip clamp voltage input to VIN pin isn’t within this
voltage range. This sync chip clamp voltage is the voltage from the pedestal voltage
Note 4. The measurement point is the point A in Figure 2
Note 5. The reference signal is the 100% white signal.
Measurement Point A
Video Signal Output
C1
75 ohm
R1
C2
R2
75 ohm
Figure 2. Load Capacitance C1 and C2
(Ta=25°C; VDD=2.7 ∼ 3.6V)
Parameter
High-Level Input Voltage
Low-Level Input Voltage
DC CHRACTERISTICS
Symbol
min
(PDN pin)
VIH
1.5
(PDN pin)
VIL
-
typ
max
Units
-
-
V
-
0.6
V
MS0540-E-00
-4-
2007/03