6

Multimedia ICs

BA3837 / BA3837F / BA3838F

Parameter

Symbol

Min.

Typ. Max.

Unit

Conditions

1.6

2.4

3.3

mA

2.3

2.8

—

10

14

17

dB

10

14

17

dB

5

8

11

dB

CT

54

70

—

dB

MU

73

80

—

dB

SV

28

33

—

dB

THD

—

0.02

0.07

%

—

15

22

35

50

65

k

Ω

VthH

4.7

——

V

VthL

—

—

0.3

V

∆DC

—

726

mV

µVrms

Vrms

—

—

—

Quiescent current

Maximum output voltage

L / R gain

Low frequency gain

Microphone gain

Crosstalk

Mute attenuation

Vocal suppression rate

Total harmonic distortion

Noise level

Input impedance

Output switching DC differential

Control pin threshold (high)

Control pin threshold (low)

Not designed for radiation resistance.

Through mode

THD = 1%, through mode

Through mode

fin = 50kHz, vocal fader mode

Vocal fader mode

Through mode, BW : 400Hz - 30kHz

LIN, RIN, MICIN, FK

Maximum output voltage differential between L, R and TK modes

0 : 0V

1 : 5V

A B C

LOUT

ROUT

TK

0 0 0

MUTE

MUTE

MUTE

0 0 1

VF

VF

VF

0 1 0

L

L

L

0 1 1

L

R

L

1 0 0

MUTE

MUTE

MUTE

•

•

•

•

1 0 1

KC

KC

VF

1 1 0

KC

KC

L

1 1 1

KC

KC

L + R

—

—

—

—

Mute

Vocal fader mode

Sound multiplexing mode

Through mode

Mute

Vocal fader mode

Sound multiplexing mode

L + R

Key controller mode

Mode

VF : vocal fader output

KC : signal passed through key controller

1. L / R input and output in the through mode are synchronous with a gain of 14dB.

2. L / R input and TK output in the key controller mode are synchronous with a gain of 8dB.

3. FK input and L / R output in the key controller mode are synchronous with a gain of 6dB.

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

(1) Microphone output is not muted during muting (ABC = 000 or 100).

(2) Gain and relative phase: See block diagram.

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

Ω)