¡ Semiconductor
MSM7586-01/03
12/42
(CODEC Unit)
AIN1+, AIN1-, AIN2, GSX1, GSX2
The transmit analog input and the output for transmit gain adjustment.
The pin AIN1–(AIN2) connects to the inverting input of the internal transmit amplifier, and the
pin AIN1+ connects to the non-inverting input of the internal transmit amplifier. The pin GSX1
(GSX2) connects to output of the internal transmit amplifier. See Fig. 6 for gain adjustment.
VFRO, AOUT+, AOUT-, PWI
Used for the receive analog output and the output for receive gain adjustment.
VFRO is an output of the receive filter. AOUT+ and AOUT– are differential analog signal outputs
which can directly drive Z
L
= 350
W
+120 nF or the 1.2 k
W
load. See Fig. 6 for gain adjustment.
However, these outputs are in high impedance state during power down.
SAO, AIN3, AIN4, GSX3, GSX4
Input pins for the internal operational amp.
Refer to Fig.␣ 6 for connection information. However, these output pins are in the high impedance
state during power down.
