Rohm BA7611AF Video signal switcher Datasheet

Multimedia ICs
Video signal switcher
BA7611AN / BA7611AF
The BA7611AN and BA7611AF are a three-channel analog multiplexers with built-in mute and a 6dB amplifier. The
ICs designed for use in video cassette recorders. It features a large dynamic range and wide operating frequency
range, and have sync-tip clamp inputs whitch are ideal for switching video signals.
Applications
•Video
cassette recorders and televisions
•1)Features
3-input / 1-output switches.
2)
3)
4)
5)
6) Low power consumption (50mW Typ.).
7) Excellent frequency characteristics
(10MHz, 0dB Typ.).
8) Wide dynamic range (3.5VP-P Typ.).
9) Low interchannel crosstalk
( – 65dB Typ., f = 4.43MHz).
Built-in 6dB amplifier.
Built-in mute.
Sync-tip clamp inputs.
Wide operating supply voltage range
(4.5V to 13.0V).
•Block diagram
BA7611AN
BA7611AF
IN1
MUTE
1
8 VOUT
MUTE
6dB Amp
CTLA 2
CTLB 3
LOGIC
5
6
7
GND
IN3
VCC
4
LOGIC
7 VCC
6 IN3
5 GND
8
VOUT
4
IN2
IN1
3
CTLB
2
CTLA
IN2
1
6dB
•Truth table
CTL - A
CTL - B
OUT
L (OPEN)
L (OPEN)
IN1
L (OPEN)
H
IN2
H
L (OPEN)
IN3
H
H
MUTE
1
Multimedia ICs
BA7611AN / BA7611AF
•Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Unit
Power supply voltage
VCC
13.5
V
Power dissipation
Pd
900∗1 (SIP8) / 550∗2 (SOP8)
mW
Operating temperature
Topr
– 25 ~ + 75
°C
Storage temperature
Tstg
– 55 ~ + 125
°C
∗1 Reduced by 9mW for each increase in Ta of 1°C over 25°C.
∗2 Reduced by 5.5mW for each increase in Ta of 1°C over 25°C.
•Equivalent circuits
CLAMP INPUT
OUTPUT
Vcc
Vcc
100Ω
IN
OUT
1.2µA
100µA
2mA
CTLa / CTLb
Vcc
20kΩ
100Ω
50kΩ
CTLa / b
34kΩ
Note:
Input bias current 1µA [Typ.]
Output impedance 20Ω [Typ.]
2
Multimedia ICs
BA7611AN / BA7611AF
•Electrical characteristics (unless otherwise noted, Ta = 25°C and V
Parameter
Symbol
Min.
Operating voltage
VCC
Supply current
ICC
Maximum output level
Voltage gain
Interchannel crosstalk
Frequency characteristic
Typ.
Max.
4.5
—
—
10.5
Vom
3.0
GV
5.5
CT
—
Cf
CC
= 5V)
Unit
Conditions
Measurement Circuit
13.0
V
—
Fig.4
15.5
mA
—
Fig.4
3.5
—
VP-P
f = 1kHz, THD = 0.5%
Fig.4
6.0
6.5
dB
f = 1MHz, VIN = 1.0VP-P
Fig.4
– 65
—
dB
f = 4.43MHz, VIN = 1.0VP-P
Fig.4
f = 10MHz / 1MHz, VIN = 1.0VP-P
0
1.0
dB
CTL pin switch level A
VTH-A
– 3.0
1.0
2.0
3.0
V
—
Fig.4
Fig.4
CTL pin switch level B
VTH-B
1.0
2.0
3.0
V
—
Fig.4
䊊Not designed for radiation resistance.
•Electrical characteristic curves
10
VCC
= 9V
7
6
5
VCC
4
= 5V
3
0
CROSSTALK: CT (dB)
8
6
VOLTAGE GAIN: Cf (dB)
OUTPUT VOLTAGE: VOUT (VP-P)
20
VCC =
12V
9
4
2
0
2
– 40
– 60
–2
1
0
0
– 20
1
2
3
4
5
100k
6
300k
1M
3M
10M
30M
– 80
100k
100M
300k
1M
3M
10M
30M
100M
INPUT VOLTAGE: VIN (VP-P)
FREQUENCY: f (Hz)
FREQUENCY: f (Hz)
Fig. 1 VIN vs. VOUT (f = 1kHz)
Fig. 2 Frequency characteristics
Fig. 3 Interchannel crosstalk
•Measurement circuit
MUTE
6dB Amp
Logic
1
2
3
V P P
4
5
6
7
8
VCC
+
SW1
1
SW3
SW2
2
1
1µF
OSC
OSC
1µF
1
50Ω
SW4
SW5
2 31
2 3
VCC
VCC
0.022µF
2
1µF
1µF
OSC
50Ω
1
2
47µF
A
1µF
50Ω
1µF
Fig. 4
3
Multimedia ICs
BA7611AN / BA7611AF
•Measurement conditions
Parameter
Current dissipation
Switch settings
SW1
SW2
SW3
SW4
SW5
Measurement
method
ICC
2
2
2
2
2
Ammeter
Symbol
Maximum
output level
IN1
IN2
IN3
Vom
Vom
Vom
1
2
2
2
1
2
2
2
1
3
3
2
3
2
3
f = 1kHz,
THD = 0.5%
∗1
Voltage gain
IN1
IN2
IN3
GV
GV
GV
1
2
2
2
1
2
2
2
1
3
3
2
3
2
3
f = 1MHz,
V = 1VP-P
∗2
Interchannel
crosstalk
IN1→IN2
IN1→IN3
IN1→MUTE
IN2→IN3
IN2→MUTE
IN3→MUTE
CT
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
f = 4.43MHz
V = 1VP-P
Frequency
characteristic
IN1
IN2
IN3
Gf
Gf
Gf
1
2
2
2
1
2
2
2
1
3
3
2
3
2
3
CTL pin
switching level
CTLa
CTLb
VTH
VTH
2
2
2
1
1
2
1
3
3
1
∗3
f = 10MHz
f = 1MHz
V = 1VP-P
∗4
∗5
∗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 is the maximum output level Vom (VP-P).
∗2: Input a 1VP-P, 1MHz sine wave. The voltage gain is given by GV = 20 log (VOUT / VIN).
∗3: Input a 1VP-P, 4.43MHz sine wave. The interchannel crosstalk is given by CT = 20 log (VOUT / VIN).
∗4: Input 1VP-P, 1MHz and 10MHz sine waves. The frequency characteristic is given by Gf = 20 log (VOUT (f = 10MHz) / VOUT (f = 1MHz)).
∗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 VOUT level drops below 20mVP-P.
•External dimensions (Units: mm)
BA7611AN
BA7611AF
0.8
4
4.4 ± 0.2
6.2 ± 0.3
1
0.3 ± 0.1
0.11
1.3
5
1.27
0.15 ± 0.1
0.6
8
1.5 ± 0.1
5.8 ± 0.2
1.2
2.54
5.0 ± 0.2
2.8 ± 0.2
8
1
3.5 ± 0.5
10.5 ± 0.5
19.3 ± 0.2
0.4 ± 0.1
0.3Min.
0.15
SIP8
4
SOP8
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