msm7716p Oki Semiconductor, msm7716p Datasheet - Page 4

• Manufacturer Part Number: msm7716p
• Description: Single Rail Linear Codec
• Manufacturer: Oki Semiconductor

PIN AND FUNCTIONAL DESCRIPTIONS
MAIN, MAO
Transmit microphone input and the level adjustment.
MAIN is connected to the noninverting input of the op-amp, and MAO is connected to the output of the op-amp.
The level adjustment should be configured as shown below.
During power saving and power down modes, the MAO output is in high impedance state.
PBIN, PBO
Transmit handset input and the level adjustment.
PBIN is connected to the noninverting input of the op-amp, and PBO is connected to the output of the op-amp. The
level adjustment should be configured as shown below.
During power saving and power down, the PBO output is in high impedance state.
V
Power supply pin for +3.0 to 3.6 V (Typically 3.3 V).
AG
Analog signal ground.
DG
Ground pin for the digital signal circuits.
This ground is separated from the analog signal ground in this device. The DG pin must be connected to the AG pin
on the printed circuit board.
OKI Semiconductor
Handset
microphone input
DD
Microphone input
C1
C2
R1
R3
R2
R4
MAO
MAIN
PBO
PBIN
SG
SG
–
+
–
+
R1 : variable
R2 > 20 k
C1 > 1/ (2  3.14  30  R3) (F)
Gain = R2/R1 < 63
R3 : variable
R4 > 20 k
C2 > 1/ (2  3.14  30  R3) (F)
Gain = R4/R3 < 63
FEDL7716P-01
MSM7716P
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