viewfinder driver. BA7149F Datasheet

BA7149F driver. Datasheet pdf. Equivalent

BA7149F Datasheet
Recommendation BA7149F Datasheet
Part BA7149F
Description Electronic viewfinder driver
Feature BA7149F; Video ICs Electronic viewfinder driver BA7149F The BA7149F is an electronic viewfinder driver for v.
Manufacture Rohm
Datasheet
Download BA7149F Datasheet




Rohm BA7149F
Video ICs
Electronic viewfinder driver
BA7149F
The BA7149F is an electronic viewfinder driver for video cameras. It separates the synchronous signal from the input
video signal, and outputs the vertical deflection drive output and horizontal deflection signals. HD and VD output sig-
nals with guaranteed phase difference are also provided for on-screen displays (OSD). The differences between the
BA7149F and the BA7148F are the horizontal blanking, horizontal AFC output, HD output phase and pulse width.
Applications
Video cameras
Features
1) Operates off a 5V power supply.
2) Built-in vertical deflection circuit.
3) Built-in wide-bandwidth amplifier.
4) Built-in HD and VD output terminals.
5) Few attached components required.
6) SOP 16pin package.
7) Compatible with 10µ sec flyback pulses.
Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Applied voltage
Power dissipation
VCC Max.
Pd
Operating temperature
Topr
Storage temperature
Tstg
Reduced by 5mW for each increase in Ta of 1°C over 25°C.
Limits
8.0
500
– 20 ~ + 75
– 55 ~ + 125
Unit
V
mW
°C
°C
Recommended operating conditions (Ta = 25°C)
Parameter
Symbol Min. Typ. Max.
Power supply voltage
VCC 4.5 5.0 5.5
Unit
V
1



Rohm BA7149F
Video ICs
Block diagram
16 15 14 13 12 11 10
9
H.OSC
PHASE
COMP
H.BLK
6dB
AMP
SYNC
SEPA
V.BLK
V.SEPA
V.DRIVE
V.OSC
12345678
BA7149F
Pin descriptions
Pin No.
Function
1 Vertical control input
2 Power supply 1
3 Vertical deflection drive (POS)
4 GND 1
5 Vertical deflection drive (NEG)
6 Vertical oscillator external resistor
7 Vertical oscillator external capacitor
8 VD output
Pin No.
Function
9 HD output
10 GND 2
11 Video input
12 Power supply 2
13 Video output
14 Phase comparator output
15 Horizontal oscillator external resistor
16 Horizontal AFC output
2



Rohm BA7149F
Video ICs
Electrical characteristics (unless otherwise noted, Ta = 25°C and Vcc = 5.0V)
Parameter
Symbol Min. Typ. Max.
Unit
Operating current dissipation
ICC 31.0 42.0 55.0 mA
VIDEO AMP
Voltage gain
GV 5.3 6.0 6.7 dB
D range
DRV
3.20 3.50
VP-P
Frequency characteristic
fC – 2.0 0.0 + 2.0
dB
Minimum sync separation voltage Vsyn · Min.
45 120 mVP-P
Horizontal blanking width
TH · BL
9.6 10.7 11.4
µs
Vertical blanking width
Horizontal
TV · BL
870 970 1070
µs
Free-running frequency
fH · O 13.9 15.7 17.5
kHz
Capture range
f CAP ± 2.1 ± 3.0
kHz
AFC output pulse width
THP 10.2 11.1 12.0
µs
AFC lock-in phase
THPH – 1.9 – 1.2 – 0.5
µs
Pulse voltage low
Vertical
VHPL
0.5 1.1 1.7
V
Free-running frequency
fV · O 51.3 54.8 58.2
Hz
Pin 3 maximum output amplitude
VVP · Max.
2.10
2.70
VP-P
Pin 5 maximum output amplitude
VVN · Max.
2.10
2.70
VP-P
HD · VD
Phase difference
HD pulse width
V pulse width
Pulse voltage low
THVD
THD
TVD
VHV · L
17.3
8.7
860
21.3
9.9
960
0.1
25.3
11.1
1060
0.3
µs
µs
µs
V
Pulse voltage high
VHV · H 4.7 4.9
V
Not designed for radiation resistance.
BA7149F
3







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