AMIS-492x0

3.3 Transmitter Blocks

Table 7: MDS-MAU Interface

Parameter

Symbol

Min.

Typ.

Max.

Units

Conditions

MDS-MAU Interface

POL input pin

POL

V

TxE input pin

TxE

V

TxS input pin

TxS

See Schmitt Trigger input specs

V

Note: The associated MDS chip must handle the jabber detect function.

Table 8: Tri-level Modulator

Parameter

Symbol

Min.

Typ.

Max.

Units

Conditions

Tri-level Modulator and Slew Control

(Output is at VDRV)

Output voltage

3.02

V

Load current

-35

+120

μA

|

∆V| 10mV

Output for silence

(1)

V

TXE disabled

Output for high level

(1)

V

TXE active

Output for low level

(1)

V

TXE active

-0.02

0.02

V

Rise and fall times

(2)

tf, tr

4.7

μsec

Note 2

Notes:

1.

2.

By adding an external capacitor between the CRT pin and ground, slew rate at VDRV output can be controlled. The controlling equation is tf or tr = 2us +

should have a guard pattern around them to avoid unnecessary interference.

Table 9: Current Control Amplifier

Parameter

Symbol

Min.

Typ.

Max.

Units

Conditions

Current Control Amplifier

(Output is at CCOUT)

Input common mode voltage

range

0

V

Output voltage swing

1

V

Load current

-2300

100

μA

Input offset voltage

-3

+3

mV

Slew rate

SR

0.54

V/

μs

Gain bandwidth product

GBW

1.15

MHz

Phase margin

PM

66

Deg

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