BA7046_ 查看數據表（PDF） - ROHM Semiconductor
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BA7046_ Datasheet PDF : 7 Pages
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Multimedia ICs
BA7046 / BA7046F
•Electrical characteristics (unless otherwise noted Ta = 25°C and VCC = 5.0V)
Parameter
Symbol Min. Typ. Max. Unit
Conditions
Quiescent current
IQ 2.0 4.1 6.2 mA pin 3 open
Minimum synchronization separation level Vsyn-Min. — 0.08 0.15 VP-P pin 6 terminated with 75Ω resistor
Pulse voltage, LOW
VP-L
—
0.1 0.3 V pins 2, 4
Pulse voltage, HIGH
VP-H 4.7 4.9 — V pins 2, 4
(Horizontal) free-running frequency
fH-O 13.9 15.7 17.5 kHz No input signal, I1 = open
Capture range
Lock-in phase difference
HD, VD phase difference
HD pulse width
VD pulse width
᭺ Not designed for radiation resistance.
∆fCAP ± 2.1 ± 2.9 — kHz
THPH – 1.0
0 + 1.0 µs pin2
THVD 17.0 23.5 30.0 µs pin4
THD 4.6 5.1 5.6 µs pin2
TVD 190 230 270 µs pin4
pin– 6
pin– 2
•Measurement circuit
2200p
0.022µ
1µ +
39k
VCC
8
47µ
+
A
7
Video In
75
1µ +
6
5
470k
1
2
3
4
II
130k
VTVTVT
100p
10k VCC
Fig. 7
•Circuit operation
(1) Synchronization separation circuit
Detects the charging current to a externally-connected
capacitor, and performs synchronization separation.
(2) Horizontal oscillation circuit
When a video signal is input, it is synchronized with
Hsync by the PLL. The horizontal free-running frequency
is determined by external resistor R1.
fH-O = 2.05E6 [kHz]
R1
(3) Vertical synchronization separation circuit
When a video signal is input, synchronization signal
separation is done over the vertical synchronization
pulse interval.
3
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