Rohm BA7062F Sync separator ic with afc Datasheet

Multimedia ICs
SYNC separator IC with AFC
BA7062F
The BA7062F separates the synchronization signals from a video signal and outputs the horizontal and vertical synchronization signals (HD and VD), and the composite synchronization signal (Sync-out).
The HD and VD pulse widths are different.
•TVsApplications
and VCRs
•1)Features
Built-in AFC circuit.
4) SOP 8-pin package.
5) Horizontal free-run frequency does not require adjustment.
2) Low power dissipation (approx. 21mW).
3) Low external parts count.
•Absolute maximum ratings (Ta = 25°C)
Parameter
Power supply voltage
Symbol
VCC
Max.
Limits
Unit
8.0
V
mW
Pd
350∗
Operating temperature
Topr
– 20 ~ + 75
°C
Storage temperature
Tstg
– 55 ~ + 125
°C
Power dissipation
∗ When mounted on a 50mm × 50mm PCB, reduced by 3.5mW for each increase in Ta of 1°C over 25°C.
•Recommended operating conditions (Ta = 25°C)
Parameter
Operating power supply voltage
Symbol
Min.
Typ.
Max.
Unit
VCC
4.5
—
5.5
V
•Block diagram
1
H.OSC
PHASE
COMP
2
7
SYNC
SEPA
3
4
8
V.SEPA
6
5
1
Multimedia ICs
BA7062F
•Pin descriptions
Function
Pin No.
1
Horizontal oscillator resistor
2
HD output
3
SYNC output (open collector)
4
VD output
5
GND
6
Video input
7
Power supply
8
Phase comparator output
•Input / output circuits
VCC
VCC
200
12k
3pin
200
2pin
1k
5k
1pin
100µA
Fig. 1
Fig. 3
Fig. 2
VCC
3k
3k
3k
VCC
VCC
10k
1k
8pin
200
4pin
100
6pin
10µA
Fig. 4
2
Fig. 5
3k
3k
3k
Fig. 6
Multimedia ICs
BA7062F
•Electrical characteristics (unless otherwise noted, Ta = 25°C and V
Parameter
Symbol Min.
Quiescent current
Typ.
Max.
Unit
CC
= 5V)
Conditions
IQ
2.0
4.1
6.2
mA
Pin 3 open
Pin 6 terminated with 75Ω resistor
Vsyn-Min.
—
0.08
0.15
VP-P
Pulse voltage, Low
VP-L
—
0.1
0.3
V
2, 4 pin
Pulse voltage, High
VP-H
4.7
4.9
—
V
2, 4 pin
(Horizontal)
free-running frequency
fH-O
13.9
15.7
17.5
kHz
Capture range
∆fCAP ± 2.1
± 2.9
—
kHz
Lock-in phase
THPH
– 1.0
+ 1.0
µs
2pin
HD pulse width
THD
10.5
11.5
12.5
µs
2pin
VD pulse width
TVD
200
260
320
µs
4pin
Minimum SYNC separation level
0
No input signal, I1 = open
—
– 6pin
䊊 Not designed for radiation resistance.
•Measurement circuit
0.022µ
Video In
47µ
1µ
+
1µ
39k
2200p
75
+
VCC
1µ
A
+
8
7
6
5
1
2
3
4
470k
130k
II
V
T
V
10k
VCC
T
V
T
100p
Fig. 7
operation
•(1)Circuit
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 =
(3) Vertical synchronization separation circuit
When a video signal is input, synchronization signal
separation is done over the vertical synchronization
pulse interval.
2.05E6
[kHz]
R1
3
Multimedia ICs
•V , H , and V
IN
D
D
BA7062F
timing charts
Vertical synchronizing pulse interval
NTSC signal
Odd-number field
(IN)
NTSC signal
Even field (IN)
VD
(OUT)
HD
Odd field (OUT)
HD
Even field (OUT)
Fig. 8
(1) The rise and fall positions for VD are basically the same for both odd and even fields.
(2) HD shifts by 1 / 2H during the odd and even field interval.
4
1 / 2H
Multimedia ICs
BA7062F
•Application example
∗
R2
R1
C4
C2
R3
470k
VCC = 5V
10k
VCC = 5V
100p
1
PHASE
COMP
H.OSC
10k
HD
2
SYNC
3
2200p
130k
8
47µ
C6
0.022µ
1µ
C1
SYNC
SEPA
6
V.SEPA
R4
1µ
+
5
R2 470k
∗ By configuring the circuit enclosed in the dotted line to that in the
Vsig
330
470k
1000p
4
+ C5
C3
7
R5
VD
+
C7
VCC
+
diagram on the right, you can decrease the lock-in time and increase
the capture range.
R3
10k
C3-1
0.47µ
8
+
C2
2200p
C3-2
0.47µ
Fig. 9
• When SYNC SEPA output only is used. HD and VD unused.
VCC = 5V
R1
VCC = 5V
+ C5
120k
H.OSC
HD
2
SYNC
3
47µ
8
SYNC
SEPA
C1
6
+
R5
VD
4
C6
0.022µ
7
5
V.SEPA
R4
1µ
Vsig
330
470k
1000p
1
10k
PHASE
COMP
C7
Fig. 10
(1) Connect pin 1 to GND via a 120kΩ (approx.) resistor. Leave pins 2, 4 and 8 open.
(2) SYNC output polarity (pin 3) is positive.
(3) The delay time for rising edge of the SYNC output (pin 3) with respect to the falling edge of Sync for the Vsig
input signal (pin 6) is 850ns (reference value).
(4) The delay time for falling edge of the SYNC output (pin 3) with respect to the rising edge of Sync for the Vsig
input signal (pin 6) is 450ns (reference value).
Attached components
•Resistor
R should have a tolerance of ± 2%, and a temperature coefficient of 100ppm or lower.
1
5
Multimedia ICs
BA7062F
•Electrical characteristic curves
16.4
6.0
6
5.5
5
5.0
ICC CURRENT (mA)
ICC CURRENT (mA)
HORIZONTAL FREQUENCY (kHz)
VCC = 5V
4
3
2
4.5
4.0
3.5
3.0
1
4.0
– 25
6.0
5.0
16.6
0
25
50
75
16.0
15.8
15.6
15.4
290
11.6
11.4
11.2
11.0
0
25
50
240
75
– 25
100
25
50
75
100
Fig. 16 VD pulse width vs.
temperature
300
VCC = 5.0V
15
– cap
– lock
10
5.5
POWER SUPPLY VOLTAGE (V)
Fig. 17 Capture range / lock range vs.
power supply voltage
+ lock
20
VCC = 5.0V
fLOCK = 15.734kHz
SIGNAL - LOCK IN TIME (ms)
FREQUENCY: f (cap. lock) (kHz)
+ cap
5.0
0
TEMPERATURE (°C)
Fig. 15 HD pulse width vs.
temperature
+ lock
FREQUENCY: f (cap. lock) (kHz)
250
TEMPERATURE (°C)
Fig. 14 Horizontal free-running
frequency vs. temperature
4.5
260
220
– 25
TEMPERATURE (°C)
20
270
230
10.6
100
NTSC
VCC = 5.0V
280
10.8
75
5.5
5.0
Fig. 13 Horizontal free-running
frequency vs.
power supply voltage
VD PULSE WIDTH (µS)
16.2
15.2
6
4.5
POWER SUPPLY VOLTAGE (V)
NTSC
VCC = 5.0V
11.8
HD PULSE WIDTH (µS)
HORIZONTAL FREQUENCY (kHz)
16.4
50
15.4
100
12.0
VCC = 5.0V
25
15.6
Fig. 12 Quiescent current vs.
temperature
Fig. 11 Quiescent current vs.
power supply voltage
0
15.8
TEMPERATURE (°C)
POWER SUPPLY VOLTAGE (V)
– 25
16.0
15.2
2.5
0
16.2
+ cap
15
– cap
– lock
200
100
0
10
– 25
0
25
50
75
100
TEMPERATURE (°C)
Fig. 18 Capture range / lock range vs.
temperature
13
14
15
16
17
18
19
FREQUENCY (kHz)
Fig. 19 Time from no signal
to pull in
20
Multimedia ICs
BA7062F
700
POWER LOCK IN TIME (ms)
VCC = 5.0V
fLOCK = 15.734kHz
600
500
400
300
200
100
0
13
14
15
16
17
18
19
20
FREQUENCY (kHz)
Fig. 20 Time from power on
to pull in
notes
•• Operation
Make the ground line as thick as possible.
• Keep power supply noise to a minimum.
•External dimensions (Units: mm)
1
4
0.11
1.27
0.15 ± 0.1
4.4 ± 0.2
5
1.5 ± 0.1
6.2 ± 0.3
5.0 ± 0.2
8
0.4 ± 0.1
0.3Min.
0.15
SOP8
7
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