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Multimedia ICs
Video signal switcher
BA7612N / BA7612F
The BA7612N and BA7613F are three-channel analog multiplexers with built-in mute, 6dB amplifier and 75Ω driver.
The ICs designed for use in video cassette recorders, and feature a large dynamic range and wide operating frequency range. All inputs are terminated with 20kΩ (Typ.) input impedance.
•
Applications
Video cassette recorders and televisions
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Features
1) 3-input / 1-output switches.
2) Built-in 6dB amplifier and 75Ω driver.
3) Built-in mute.
4) Large input impedance (20kΩ Typ.).
5) Wide operating supply voltage range
(4.5V ~ 13.0V BA7612N)
(4.5V ~ 9.5V BA7613F).
6) Low power dissipation (103mW Typ.).
7) Excellent frequency characteristics
(10MHz, 0dB Typ.).
8) Wide dynamic range (3.5V
P-P Typ.).
9) Low interchannel crosstalk
( – 65dB Typ., f = 4.43MHz).
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Block diagram
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Truth table
MUTE
12345678
CTLA
CTLB
IN2
GND
IN3
LOGIC
IN1
V
OUT
VCC
6dB Amp 75Ω Driver
BA7612N
1
2
3
4
8
7
6
5
IN1
CTLA
CTLB
IN2
GND
IN3
V
CC
VOUT
BA7612F
MUTE
LOGIC
75Ω6dB
OUT
IN1
H IN2
H IN3
H H MUTE
L (OPEN)
L (OPEN)
L (OPEN)
L (OPEN)
CTL A CTL B
2
Multimedia ICs BA7612N / BA7612F
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Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol Limits Unit
∗
1
13.5 /
∗
2
10.0 V
mW
Topr
°C
Tstg °C
Pd
V
CC
∗
1
900
∗
3
/
∗
2
550
∗
4
– 25 ~ + 75
– 55 ~ + 125
Power supply voltage
Power dissipation
Operating temperature
Storage temperature
∗
1 BA7612N
∗
2 BA7612F
∗
3 Reduced by 9mW for each increase in Ta of 1°C over 25°C.
∗
4 Reduced by 5.5mW for each increase in Ta of 1°C over 25°C.
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Electrical characteristics (unless otherwise noted, Ta = 25°C and VCC = 5V)
Parameter Symbol Min. Typ. Max. Unit Conditions
V
CC 4.5 — 13.0 V
I
CC — 20.5 29.0 mA
3.0 3.5 — V
P-P f = 1kHz, THD = 0.5%
BA7612F is Max.9.5V
G
V dB
C
T —– 65 — dB
C
f – 3.0 0 dB
14 20 26 k
Ω
V
TH-A 1.0 2.0 3.0 V
V
TH-B 1.0 2.0 3.0 V
5.5 6.0 6.5
1.0
V
om
ZIN
f = 4.43MHz, VIN = 1.0VP-P
f = 1MHz, VIN = 1.0VP-P
f = 10MHz / 1MHz, VIN = 1.0VP-P
Operating voltage range
Supply current
Maximum output level
Voltage gain
Interchannel crosstalk
Frequency characteristic
Input impedance
CTL pin switching level A
CTL pin switching level B
䊊Not designed for radiation resistance.
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Multimedia ICs BA7612N / BA7612F
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Measurement circuit
SW1
50Ω
OSC
1µF
1µF
1
2
SW2
50Ω
OSC
1µF
1µF
1
2
V
SW3
50Ω
OSC
1µF
1µF
1
2
47µF
1000µ
43
75
0.022µF
SW
4
VCC
VCC
P P
1
2
3
SW5
VCC
1
2
3
1 2 3 4 5 6 7 8
Logic
MUTE
6dB Amp 75 Ω Driver
A
Fig. 1
~
~
~
~
+
+
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Multimedia ICs BA7612N / BA7612F
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Measurement conditions
SW1 SW2 SW3 SW4 SW5
ICC 22222
I
N1
IN2
IN3
Vom
Vom
Vom
1
2
2
2
1
2
2
2
1
3
3
2
3
2
3
I
N1
IN2
IN3
GV
GV
GV
1
2
2
2
1
2
2
2
1
3
3
2
3
2
3
I
N1→IN2
IN1→IN3
IN1→MUTE
I
N2→IN3
IN2→MUTE
I
N3→MUTE
C
T
CT
CT
CT
CT
CT
1
1
1
2
2
2
2
2
2
1
1
2
2
2
2
2
2
1
3
2
2
2
2
2
2
3
2
3
2
2
I
N1
IN2
IN3
Gf
Gf
Gf
1
2
2
2
1
2
2
2
1
3
3
2
3
2
3
CTLa
CTLb
V
TH
VTH
2
2
2
1
1
2
1
3
3
1
f = 1kHz
THD = 0.5%
f = 1MHz,
V = 1V
P-P
f = 4.43MHz,
V = 1VP-P
V
=
1V
P-P
f
=
10MHz / f
=
1MHz,
∗
1
∗
2
∗
3
∗
4
∗
5
Parameter Symbol
Switch settings
Measurement
method
Current dissipation
Ammeter
Maximum
output
level
Voltage gain
Interchannel
crosstalk
Frequency
characteristic
CTL pin
switching level
∗
1: Connect a distortion meter to the output, and input a f = 1kHz sine wave. Adjust the input level until the output distortion is 0.5%.
This output voltage at this time multiplied by 2 is the maximum output level V
om (VP-P).
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2: Input a 1VP-P, 1MHz sine wave. The voltage gain is given by GV = 20 log (VOUT / VIN) + 6.
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3: Input a 1VP-P, 4.43MHz sine wave. The interchannel crosstalk is given by CT = 20 log (VOUT / VIN).
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4: Input 1VP-P, 1MHz and 10MHz sine waves.
The frequency characteristic is given by G
f = 20 log (VOUT (f = 10MHz) / VOUT (f = 1MHz)).
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5: Input a 1VP-P, 1MHz sine wave. Reduce the CTL pin voltage from VCC.
The CTL pin switching level (VTH) is the CTL pin voltage at which the V
OUT level drops below 20mVP-P.
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Electrical characteristic curves
123456
VCC = 9V
V
CC = 5V
6
5
4
3
2
1
0
f
= 1kHz
V
CC = 12V
INPUT VOLTAGE: VIN (V)
OUTPUT VOLTAGE: VOUT (V)
Fig. 2 VIN vs. VOUT caracteristics (f = 1kHz)
8
6
4
2
0
– 2
– 4
– 6
– 8
1M 10M 100M100k
SIGNAL ATTENUATE LEVEL: (dB)
FREQUENCY: (Hz)
V
CC = 5V
V
IN = 1VP-P
Fig. 3 Frequency characteristics
1M 10M
100M
0
– 20
– 40
– 60
– 80
100k
SIGNAL ATTENUATE LEVEL: (dB)
FREQUENCY: (Hz)
V
CC = 5V
V
IN = 1VP-P
Fig. 4 Interchannel crosstalk
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Multimedia ICs BA7612N / BA7612F
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Operation notes
The output impedance is approximately 32Ω. Therefore,
to ensure output matching, connect an external resistor of 43Ω.
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External dimensions (Units: mm)
SIP8 SOP8
BA7612N BA7612F
10.5 ± 0.5
1
8
2.54
3.5 ± 0.5
1.3
0.8
0.6
0.3 ± 0.1
2.8 ± 0.2
19.3 ± 0.2
1.2
5.8 ± 0.2
0.4 ± 0.11.27
0.15
0.3Min.
0.15 ± 0.1
0.11
6.2 ± 0.3
4.4 ± 0.2
5.0 ± 0.2
85
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1.5 ± 0.1
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