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BA7745FS Datasheet(Fiches technique) 4 Page - Rohm

Numéro de pièce BA7745FS
Description  VCR Hi-Fi audio signal REC / PB amplifier with flying-erase oscillator
Télécharger  8 Pages
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Fabricant  ROHM [Rohm]
Site Internet  http://www.rohm.com
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4
Video ICs
BA7745FS
Playback system (unless otherwise noted, Ta = 25°C, VCC = 5V, and f = 1.5MHz)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
Iq (PB)
19.0
31.0
mA
GVP1
80
83
86
dB
GVP2
80
83
86
dB
∆GVP
– 2.0
0
+ 2.0
dB
CT1→2
– 40
– 35
dB
CT2→1
– 40
– 35
dB
fP1
0
– 2.4
– 5
dB
fP2
0
– 2.4
– 5
dB
17pin: “L” 11pin: 2.0V
23pin, 20.5dB
µIN, 10pin OUT, 8pin: “H”
25pin, 20.5dB
µIN, 10pin OUT, 8pin: “L”
23pin 31.0dB
µ, 25pin 0 IN,
23pin 0, 25pin 31.0dB
µIN,
23pin 20.5dB
µIN, 8pin: “H”
f = 2.2MHz / 1.0MHz,
∆10pin OUT
25pin 20.5dB
µIN, 8pin: “L”
f = 2.2MHz / 1.0MHz,
∆10pin OUT
∆GVCA
– 40
– 30
dB
+
∆GVCA
+ 4
+ 6
dB
VOMP
2.0
2.6
VP-P
VNP1
0.4
1.0
µVrms
VNP2
0.4
1.0
µVrms
VHS2
0.0
2.2
V
VHS1
2.8
VCC
V
∆VODC
– 20
0
+ 20
mV
V17L
0.0
1.0
V
V17H
3.5
VCC
V
RSWP
—5
10
V9L
0.0
2.2
V
V9H
3.5
VCC
V
GVP. EP
4.0
5.0
6.0
dB
8pin: “H”
→ “L”, ∆10pin OUT
8pin: “H”
→ “L”, ∆10pin OUT
11pin 2.0V
→0.8V, ∆10pin OUT
11pin 2.0V
→3.3V, ∆10pin OUT
23pin, 25pin, 20.5dB
µIN, ∆10pin OUT
〈Playback mode〉
Supply current
Voltage gain CH1
Voltage gain CH2
Voltage gain differential
CH1 to CH2 crosstalk
CH2 to CH1 crosstalk
CH1 frequency characteristic
CH2 frequency characteristic
Gain adjustment headroom
Gain adjustment headroom
Maximum output voltage
CH1 input conversion noise
CH2 input conversion noise
Head switch voltage
Head switch voltage
Output DC offset
PB holding voltage
REC holding voltage
Head switch-on resistance
SP holding voltage
EP holding voltage
Gain emphasis EP
Inflow current to pin 12 when no signal.
Pin 23 and 25 IN, pin 10 OUT 3rd-harmonic distortion, when -30dB.
Input conversion for pin 23: 0.01
µF + 10Ω at GND
Pin 8: “H”, pin 10 OUT.
Input conversion for pin 25: 0.01
µF + 10Ω at GND
Pin 8: “L”, pin 10 OUT.
Pin 8 DC when CH2 operating
Pin 8 DC when CH1 operating
23, 25pin 0 IN, 8pin: “H”
→ “L”, ∆10pin OUT
Pin 17 DC for PB mode
Pin 17 DC for REC mode
Pin 20 ON resistance
Pin 9 DC for SP mode
Pin 9 DC for EP mode
23, 25pin 20.5dB
µIN, 9pin: “H”, 10pin OUT
Design reference values
Flying erase system (unless otherwise noted, Ta = 25°C, VCC = 11.0V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
5pin: “H”
Iq (FE)
12.0
mA
V2
5.5
V
2pin DC
V3
5.5
V
3pin DC
V6
1.0
V
6pin DC
V32
4.3
V
32pin DC
f32
8
13
MHz
32pin OUT
υ32
2.8
VP-P
32pin OUT
V5H
4.0
VCC
V
0
0.5
V
V5L
5pin DC, When FE ON
5pin DC, When FE OFF
〈Flying erase mode〉
Supply current
Pin 2 voltage
Pin 3 voltage
Pin 6 voltage
Pin 32 voltage
Oscillator frequency range
Output amplitude range
FE ON holding voltage
FE OFF holding voltage
The values given above are design values, they are not ratings and are not guaranteed.
Pin 31 inflow current




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