¡ Semiconductor

ML7000-01/02/03/ML7001-01/02/03

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PIN FUNCTIONAL DESCRIPTION

AIN+, AIN–, GSX

Transmit analog input and transmit level adjustment.

AIN+ is a non-inverting input to the op-amp; AIN– is an inverting input to the op-amp; GSX is

connected to the output of the op-amp.

The level adjustment should be performed using any of the methods shown below. During

power-saving and power-down modes, the GSX output is at AG voltage.

AG

Analog ground.

VFRO

Receive filter output.

and below the signal ground voltage (SG) when the digital signal of +3 dBm0 is input to PCMIN

and can drive a load of 20 kW or more.

For driving a load of less than 20 kW, connect a resistor of 20 kW or more between the pins VFRO

and PWI.

During power-saving or power-down mode, the VFRO output is at an SG level.

When adjusting the receive signal on the basis of frequency characteristics, refer to the Frequency

Characteristics Adjustment Circuit.

–

+

AIN–

AIN+

C1

Analog input

R1 : variable

R2 > 20 kW

C1 > 1/(2 ¥ 3.14 ¥ 30 ¥ R1)

R2

GSX

SG

+

–

AIN+

AIN–

R3 > 20 kW

R4 > 20 kW

R5 > 50 kW

C2 > 1/ (2 ¥ 3.14 ¥ 30 ¥ R5)

R4

GSX

SG

C2

Analog input

R3

R5

R1