FEDL7022-01-06
1
Semiconductor
ML7022-01
FUNCTIONAL DESCRIPTION
Pin Functional Description
AIN1, AIN2, GSX1, GSX2
AIN1 and AIN2 are the transmit analog inputs for Channels 1 and 2.
GSX1 and GSX2 are the transmit level adjustments for Channels 1 and 2.
AIN1 and AIN2 are inverting inputs for the op-amp; GSX1 and GSX2 are connected to the output of the op-amp
and are used to adjust the level, as shown below.
If AIN1 and AIN2 are not used, connect AIN1 to GSX1 and AIN2 to GSX2. During power saving and power down
mode, the GSX1 and GSX2 outputs are at AG voltage.
In the case of the analog input 2.26 Vpp at GSX pin with digital output +3.17 dBm0 (µ-law).
GSX1
CH1 Gain
Gain = R2/R1 ≤ 10
R1: Variable
R2 > 20 kΩ
R2
R4
AIN1
CH1
Analog
Input
C1 R1
C1 > 1/ (2 × 3.14 × 30 × R1)
SG
CH2 Gain
Gain = R4/R3 ≤ 10
R3: Variable
R4 > 20 kΩ
C2 > 1/ (2 × 3.14 × 30 × R3)
GSX2
AIN2
CH2
Analog
Input
C2 R3
SG
AOUT1, AOUT2
AOUT1 is the receive analog output for Channel 1 and AOUT2 is used for Channel 2.
The output signal has an amplitude of 3.4Vpp above and below the signal ground voltage (SG).When the digital
signal of +3.17 dBm0 is input to DIN, it can drive a load of 600Ω or more.
During power saving or power down mode, these outputs are at a high impedance.
VDD
Power supply for +5 V.
Connect a bypass capacitor of 0.1 µF with excellent high frequency characteristics between this pin and the AG
pin.
Although VDD pin 1 and VDD pin 15 are connected internally, these pins must be connected on the printed circuit
board.
12/20
OKI [ OKI ELECTRONIC COMPONETS ]
