BA7781 データシートの表示（PDF） - ROHM Semiconductor
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BA7781 Datasheet PDF : 7 Pages
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Video ICs
BA7781K
•Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Unit
Power supply voltage
VCC
7.0
V
Power dissipation
Pd
400∗
mW
Operating temperature
Topr
– 10 ~ +70
°C
Storage temperature
Tstg
– 55 ~ +125
°C
∗ Reduced by 4mW for each increase in Ta of 1°C over 25°C.
•Recommended operating conditions (Ta = 25°C)
Parameter
Symbol Min. Typ. Max.
Unit
Power supply voltage
VCCS
3.0
—
5.25
V
•Electrical characteristics (unless otherwise noted, Ta = 25°C and VCC = 3.3V)
Parameter
Current dissipation 1
Current dissipation 2
Preamplifier gain
Output amplifier gain
Distortion
Maximum output voltage
Output noise voltage
Input switch separation
Interchannel separation
Symbol Min. Typ. Max. Unit
Conditions
IINT
—
5.0
8.0
mA
INT MIC IN, L / Rch
No dissipation by mic
IEXT
—
4.8
8.0
mA
EXT MIC IN, L / Rch
No dissipation by mic
VGPR
12
13
14
dB
30 / 32pin→2pin GAIN
27 / 25pin→23pin GAIN
VGOA
14
15
16
dB
3 / 6 / 7pin→8pin GAIN
22 / 19 / 18pin→17pin GAIN
THD
— 0.05 0.3
% INT / EXT, Vo = 300mVrms, L / Rch∗2
Vom
0.85 1.1
—
Vrms
INT / EXT MIC IN, L / Rch
f = 1kHz (distortion 1%∗2 )
VNO
— – 90 – 80
dBV
INT / EXT, L / Rch, Rg = 1kΩ
When gain is 28dB∗1
CTI→E
— – 88 – 70
dB
INT→EXT MIC IN, Rg = 1kΩ, L / Rch
(distortion 1%∗2 ) , when gain is 28dB∗1
CTL← →R — – 61 – 50
dB
INT / EXT MIC, Lch→Rch, Rg = 1kΩ
(distortion 1%∗2 ) , when gain is 28dB∗1
Internal microphone power supply voltage VREG
2.3 2.5 2.75
V Pin 27 output voltage for 30kΩ load
Input switch control voltage
High-pass filter switching
attenuation characteristic
High-pass filter control voltage
∗1 JIS-A filter used.
∗2 400Hz to 30kHz filter used.
2
VHSWH
1.6
VHSWL
0
VGHON
—
VGHOFF
—
VHON
2.5
VHOFF
0
—
VCC
— 0.6
— – 30
— – 30
—
VCC
— 0.3
V “H”level, 1 / 24 pin DC
V “L” level, 1 / 24 pin DC
Input 80Hz signal to pin 15, and
measure gain at switch off side.∗1
15pin – 29.0dBV IN (80Hz)
dB 6 / 19pin – 25.5dBV IN (1kHz)
6→8pin / 19→17pin GAIN
15pin – 45.0dBV IN (80Hz)
dB 7 / 18pin – 25.5dBV IN (1kHz)
7→8pin / 18→17pin GAIN
V HPF on holding voltage (pin 16)
V HPF off holding voltage (pin 16)
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