HMMC-3102 datasheet(4/6 Pages) HP

Part #	HMMC-3102

Description	DC - 16 GHz Packaged Divide-by-2 Prescaler

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Manufacturer	HP [Agilent(Hewlett-Packard)]

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Input dc Offset

If an RF signal with sufﬁcient signal

to noise ratio is present at the RF

input lead, the prescaler will operate

and provide a divided output equal the

input frequency divided by the divide

modulus. Under certain "ideal" condi-

tions where the input is well matched

at the right input frequency, the com-

ponent may “self-oscillate”, especially

under small signal input powers or

with only noise present at the input

This “self-oscillation” will produce a

undesired output signal also known

as a false trigger. To prevent false

triggers or self-oscillation conditions,

apply a 20 to 100 mV dc offset voltage

between the RFin and RFin ports. This

prevents noise or spurious low level

signals from triggering the divider.

Adding a 10 kΩ resistor between the

unused RF input to a contact point at

the VEE potential will result in an offset

of ≈ 25 mV between the RF inputs.

Note however, that the input sensitiv-

ity will be reduced slightly due to the

presence of this offset.

Assembly Notes

Independent of the bias applied to the

package, the backside of the package

should always be connected to both

a good RF ground plane and a good

thermal heat sinking region on the

PC board to optimize performance.

For single-ended output operation the

unused RF output lead should be ter-

minated into 50 Ω to a contact point

at the VCC potential or to RF ground

through a dc blocking capacitor.

A minimum RF and thermal PC board

contact area equal to or greater than

2.67 × 1.65 mm (0.105" × 0.065") with

eight 0.020" diameter plated-wall

thermal vias is recommended.

MMIC ESD precautions, handling con-

siderations, die attach and bonding

methods are critical factors in

successful GaAs MMIC performance

and reliability.

Agilent application note #54, "GaAs

MMIC ESD, Die Attach and Bonding

Guidelines" provides basic information

on these subjects.

Moisture Sensitivity Classiﬁcation:

Class 1, per JESD22-A112-A.

Figure 1. Simpliﬁed Schematic

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HMMC-3102 Datasheet(PDF) 4 Page - Agilent(Hewlett-Packard)

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