9

9 - 6

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Phone: 978-250-3343

Fax: 978-250-3373

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Application Support: Phone: 978-250-3343 or apps@hittite.com

HMC623LP4 / 623LP4E

v01.0708

RFIC DOWNCONVERTER SMT, 1.8 - 2.7 GHz

Pin number

Function

Description

interface schematic

1

vdd1rF

Power supply voltage for the rF amplifier.

external bypass capacitors of 100 pF,

1000pF, and 2.2 μF are required.

24

vdd2rF

2, 4, 6 - 8,

10, 11, 13, 16,

18 - 20, 23

n/c

no connection necessary. these pins

may be connected to rF/Dc Ground

3

rFin

this pin is Dc coupled

and matched to 50 ohms.

4

res

this pin is used to set the Dc current of the rF

amplifier by selection of the external bias resistor.

see application circuit and bias resistor value table.

5

GnD

Backside of package has exposed metal ground

paddle that must also be connected to ground.

9

Loin

this pin is Ac coupled

and matched to 50 ohms.

12

vddLo

Power supply for Lo amplifier.

An external rF bypass capacitor is required.

14

mixiF

For applications not requiring operation to Dc this

port should be Dc blocked externally using a series

capacitor. choose value of capacitor to pass iF

frequency desired. For operation to Dc, this pin must

not sink/source more than 40 mA of current or failure

may result.

15

iFin

this pin is Dc coupled.

An off chip Dc blocking capacitor is required.

17

iFoUt

iF output and Dc Bias (vcc) for the output stage.

Pin Descriptions