RMPA29000 Datasheet, PDF (3/10 Pages) Fairchild Semiconductor – 27-30 GHZ 1 Watt Power Amplifier MMIC

Application Information
CAUTION: THIS IS AN ESD SENSITIVE DEVICE.
Chip carrier material should be selected to have GaAs compatible thermal coefficient of expansion and high thermal
conductivity such as copper molybdenum or copper tungsten. The chip carrier should be machined, finished flat, plated with
gold over nickel and should be capable of withstanding 325°C for 15 minutes.
Die attachment should utilize Gold/Tin (80/20) eutectic alloy solder and should avoid hydrogen environment for PHEMT
devices. Note that the backside of the chip is gold plated and is used as RF and DC ground.
These GaAs devices should be handled with care and stored in dry nitrogen environment to prevent contamination of
bonding surfaces. These are ESD sensitive devices and should be handled with appropriate precaution including the use of
wrist grounding straps. All die attach and wire/ribbon bond equipment must be well grounded to prevent static discharges
through the device.
Recommended wire bonding uses 3mils wide and 0.5mil thick gold ribbon with lengths as short as practical allowing for
appropriate stress relief. The RF input and output bonds should be typically 12 mils long corresponding to a typical 2 mil gap
between the chip and the substrate material.
DRAIN SUPPLY
(VDA & VDB)
RF IN
MMIC CHIP
RF OUT
2.946
2.672
GROUND
(Back of the Chip)
GATE SUPPLY
(VGA & VGB)
Figure 1. Functional Block Diagram
1.651
1.461
1.285
0.254
0.0
0.236
0.122
4.445
5.210
5.072
Dimensions in mm
Figure 2. Chip Layout and Bond Pad Locations
(Chip Size is 5.210mm x 2.946mm x 50µm Typical. Back of chip is RF and DC Ground)
©2004 Fairchild Semiconductor Corporation
RMPA29000 Rev. D