msm7570l-01 Oki Semiconductor, msm7570l-01 Datasheet - Page 4

• Manufacturer Part Number: msm7570l-01
• Description: Multi-function Adpcm Codec Msm7570l-01/02multi-function Adpcm Codec
• Manufacturer: Oki Semiconductor

¡ Semiconductor
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
which can directly drive Z
Analog Input
Differential
0.1 mF
Vi
10 mF
Transmit Gain: V
= (R2/R1) ¥ (R4/R3)
Receive Gain: Vo/V
= 2 ¥ (R6/R5)
Z
Z
L
L
= 120 nF
= 120 nF
+
–
+ 350 W
+ 350 W
Figure 1 Analog Input/Output Interface
L
C1
C1
C2
= 350 W + 120 nF or a 1.2 kW load. Refer to Fig.1 for gain adjustment.
V
GSX2
O
Differential
Sound Output
FRO
R1
R1
R3
Differential
Analog
Output
/Vi
R2
R4
R5
R6
R2
AIN1+
AIN1–
GSX1
SG
AIN2
GSX2
VFRO
PWI
AOUT–
AOUT+
SAO+
SAO–
–
+
–
+
–1
+1
–1
–
+
to ENCODER
V
MSM7570L-01/02
REF
from
DECODER
SELECT
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