BA7780 データシートの表示（PDF） - ROHM Semiconductor

部品番号

コンポーネント説明

メーカー

BA7780

Stereo zoom microphone amplifier for camcorders

ROHM Semiconductor 

Video ICs

BA7780KV

•Measurement circuit switching table (blank cells: no spesification)

Parameter

Current dissipation

Voltage gain 1

Voltage gain 2

Voltage gain 3

Voltage gain 4

Distortion 1

Distortion 2

Distortion 3

Maximum output

Output noise voltage 1 (EXT)

Output noise voltage 2 (WIDE)

Output noise voltage 3 (ZOOM)

SW1

1

—

—

—

—

2

2

1

1

2

2

3

SW2

1

—

—

—

—

—

—

—

—

—

—

—

SW3

1

—

—

—

—

—

—

—

—

—

—

—

MODE6 MODE43 GAIN CTL

H, L H, L

M

L

L

M

H

—

H

—

—

M

—

—

L

H

L

M

L

L

—

H

L

M

H, L

L

L

L

L

—

H

L

H

H

L

H

Signal input pin

—

Ext

Int

Int

Int

Int

Ext

Sub

Int, Ext, Sub

—

—

—

Input switch crosstalk (INT to EXT)

2

—

—

L

L

L

Int

INT

2

—

—

H

L

M

Int

Interchannel crosstalk

EXT

2

—

—

L

L

—

Ext

GC out L / R gain differential

1

—

—

H

L

H, M, L

Int

Inverter OUT L / R gain differential

1

—

—

H

L

H, M, L

Int

Internal microphone power supply voltage

—

—

—

—

—

—

—

External power supply output voltage

—

—

—

—

—

—

—

External power supply limit current

—

—

—

—

—

—

—

Input switching CTL holding voltage

2

—

—

H

Vth

—

2

—

—

Vth

L

—

Int, Ext

Int, Ext

2

—

—

H

L

Vth

Int

Gain switching CTL holding voltage

2

—

—

H

L

Vth

Int

2

—

—

H

L

Vth

Int

HPF, CTL holding voltage

2

2.1

2.1

H

L

—

Int, Vth of pin 19

MIX 1 gain

—

—

—

H

L

M

Int

MIX 2 gain

—

—

—

H

L

—

Sub

ZOOM - BALANCE Gain 1

2

—

—

H

L

M

Int

ZOOM - BALANCE Gain 2

1

—

—

H

L

M

Sub

ZOOM - BALANCE Variable position

2

—

—

H

L

M

Int

ZOOM - BALANCE Variable inclination

2

—

—

H

L

M

Int

Sub VCA gain

—

—

—

H

L

—

Sub

∗ Gain CTL pin 26.

H, M, and L are VCC, 1/2VCC, and GND respectively.

Measure the voltage range that maintains the mode for Vth.

8

Share Link: