Select the Coupling Capacitors

er’s deterministic jitter. Jitter is decreased as the input

For ATM/SONET or other applications using scrambled

≥ 0.1µF, which provides

other applications using 8B/10B data coding, select

Setting the Offset-Cancellation Loop Time

Constant for Input Signal Detection

The capacitor between CD+ and CD- determines the

time constant of the input signal detection DC offset-

tion, a capacitor of less than 0.01µF should not be used.

Setting the Offset-Cancellation Loop Time

Constant for the Main Signal Path

The capacitor between CZ+ and CZ- determines the

time constant of the signal path DC offset-cancellation

loop. To maintain stability, it is important to keep a one-

value may be used.To guarantee stable operation, a

capacitor of less than 0.01µF should not be used.

Setting the Automatic Gain-Control Loop

The automatic gain-control loop time constant is deter-

mined by the external capacitor connected between CG+

and CG-. A value of at least 0.0022µF is recommended

Programming the Output Amplitude

(Programming the SC Pin)

Output Signal Amplitude vs SC Pin Voltage in the

Typical Operating Characteristics.

Applications Information

Wire Bonding Die

For high current density and reliable operation, the

MAX3861 uses gold metallization. Make connections to

the dice with gold wire only, and use ball-bonding tech-

niques (wedge bonding is not recommended). The

MAX3861 has two types of bond pads: the dimensions

for square bondpads are 94.4 microns by 94.4 microns;

the dimensions for the octagonal bondpads are 33.6

microns per side. Die thickness is 12mils (0.305mm).

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2.7Gbps Post Amp with Automatic Gain Control

8

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