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¡ Semiconductor

MSM7570L-01/02

PIN AND FUNCTIONAL DESCRIPTIONS

AIN1+, AIN1–, AIN2, GSX1, GSX2

Transmits analog input and the output for transmit gain adjustment.

AIN1– (AIN2) connects to the inverting input of the internal transmit amplifier. AIN1+ connects

to the non-inverting input of the internal transmit amplifier. GSX1 (GSX2) connects to the

internal transmit amplifier output. Refer to Fig.1 for gain adjustment.

VFRO, AOUT+, AOUT–, PWI

Receives analog output and the output for receive gain adjustment.

VFRO is the receive filter output. AOUT+ and AOUT– are differential analog signal outputs

Figure 1 Analog Input/Output Interface

= (R2/R1) ¥ (R4/R3)

AIN1–

GSX1

R2

C1

to ENCODER

R1

from

DECODER

Differential

Analog

Output

= 2 ¥ (R6/R5)

+ 350 W

AIN2

GSX2

R4

C2

R3

AOUT–

PWI

R6

VFRO

R5

AOUT+

AIN1+

–1

–

+

–

+

–

+

C1

R1

R2

SG

Differential

Sound Output

+ 350 W

SAO–

–1

SAO+

+1

SELECT

+

–

10 mF

0.1 mF

Differential

Analog Input

Vi