BA7230 View Datasheet(PDF) - ROHM Semiconductor
Part Name
Description
Manufacturer
BA7230 Datasheet PDF : 8 Pages
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Multimedia ICs
BA7230LS
600
400
200
f0 = 0
– 200
– 400
– 600
f0 = 3579.545kHz
+ lock VCC = 5V
+ cap
– cap
– lock
0 100 200 300 400 500 600 700 800
INPUT VOLTAGE: VIN (mVp-p)
Fig. 13 Capture range and
lock range (@) vs. input
voltage
•Operation notes
(1) RGB and video inputs should be synchronized.
When only RGB is input, connect VIDEO IN (pin 20) to
GND with a 1µF capacitor, and synchronize PCP and
BFP to RGB.
(3) Input pins with pedestal clamps cannot be left open
and must be grounded with a low impedance. When
not used, ground with a 1µF capacitor.
∗Input pins with pedestal clamps:
YIN (pin 3), B-YIN (pin 4), R-YIN (pin 5), VIDEO IN (pin 20)
1µF
1µF
Fig. 14
•External dimensions (Units: mm)
21.8 ± 0.2
2.8 ± 0.2
(2) The VCXO remains in a
free-running state except
during superimposition.
(4) Pin 4 (B-YIN) and pin 5
(R-YIN) have high imped-
ance and are susceptible
to the effects of noise and
other external factors dur-
ing pattern generation. For
this reason, we recom-
mend adding the circuit in
Fig. 15 to lower the input
impedance. Adding this cir-
cuit can also reduce carrier
leakage.
LPF 0.5MHz
1.2mH L2 R17 1kΩ
1.2mH L1 R16 1kΩ
18
VCC
17
Q1
3kΩ
+ C11 1µF 4
VCC
+ 300Ω C10 5
Q2
1µF
3kΩ
300Ω
Q1, Q2: 2SC2021 (ROHM)
Fig. 15
0.889
1
2
0.5 ± 0.1
23
24
SZIP24
0.3
+ 0.1
– 0.05
2.54 ± 0.25
8
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