MSM7570-01 Ver la hoja de datos (PDF) - Oki Electric Industry
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MSM7570-01 Datasheet PDF : 26 Pages
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¡ Semiconductor
MSM7570-01
PIN AND FUNCTIONAL DESCRIPTIONS
AIN1+, AIN1–, AIN2, GSX1, GSX2
Transmit analog inputs and the output for transmit gain adjustment.
AIN1– (AIN2) connects to the inverting input of the internal transmit amplifier. AIN1+ connects
to 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
Receive analog outputs and the output for receive gain adjustment.
VFRO is the receive filter output. AOUT+ and AOUT– are differential analog signal outputs
which can directly drive ZL = 350 W + 120 nF or a 1.2 kW load. Refer to Fig.1 for gain adjustment.
Differential
Analog Input
Vi
0.1 mF
10 mF
+
–
C1 R1
C1 R1
C2 R3
Transmit Gain: VGSX2/Vi
= (R2/R1) ¥ (R4/R3)
Receive Gain: Vo/VVFRO
= 2 ¥ (R6/R5)
AIN1–
–
R2
+
AIN1+
R2
GSX1
SG
AIN2
–
R4
+
GSX2
VFRO
R5
PWI
R6
ZL = 120 nF
+ 350 W
Differential
VO Analog
Output
AOUT–
–
+
AOUT+ –1
VREF
to ENCODER
from
DECODER
SELECT
ZL = 120 nF
+ 350 W
Differential
Sound Output
SAO+
+1
SAO–
–1
Figure 1 Analog Input/Output Interface
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