7

Multimedia ICs

BA3837 / BA3837F / BA3838F

Ω)

Parameter

Symbol

Min.

Typ.

Max.

Unit

Conditions

1.9

2.7

3.6

mA

2.3

2.8

—

Vrms

10

14

17

dB

10

14

17

dB

5

8

11

dB

CT

54

70

—

dB

SV

28

33

—

dB

THD

—

0.02

0.07

%

—

15

22

µVrms

35

50

65

k

Ω

LIN, RIN, MICIN, FK

VthH

4.7

——

V

VthL

——

0.3

V

∆DC

—

746

mV

—

—

—

Quiescent current

Maximum output voltage

L / R gain

Low frequency gain

Microphone gain

Crosstalk

Vocal suppression rate

Total harmonic distortion

Noise level

Input impedance

Control pin threshold (high)

Output switching DC differential

Not designed for radiation resistance.

Control pin threshold (low)

Through mode

THD = 1%, through mode

fin = 50kHz, vocal fader mode

Vocal fader mode

Maximum output voltage differential between L, R and TK modes

Through mode

Through mode, BW : 400Hz - 30kHz

0 : 0V

1 : 5V

A B C

LOUT

ROUT

TK

0 0 0

0 0 1

VF

VF

VF

0 1 0

L

L

L

0 1 1

L

R

L

1 0 0

•

1 0 1

KC

KC

VF

•

1 1 0

KC

KC

L

•

1 1 1

KC

KC

L + R

•

KC

RR

KC

R

R

—

—

—

—

1. Gain of L / R input and output in the through mode: 14 dB (synchronous)

2. Gain of L / R input and TK output in the key controller mode: 8dB (synchronous)

3. Gain of FK input and L / R output in the key controller mode: 6dB (synchronous)

4. MIC input and L / R output are negative phase with a gain of 8dB.

VF : vocal fader output

KC : signal passed through key controller

Vocal fader mode

Through mode

Vocal fader mode

L + R

Sound multiplexing mode (ROUT)

Sound multiplexing (LOUT)

Sound multiplexing (R)

Sound multiplexing mode (L)

Mode

Key controller mode

Mode table (A = pin14, B = pin15, C = pin16)