HPMX-3002 datasheet(3/8 Pages) HP

3 / 8 page

6-78

HPMX-3002 Pin

Description

Ground (pins 1,3,7,8):

This RFIC is ground sensitive. A

short path to ground with minimal

parasitics must be provided on all

ground leads to prevent stability

problems. The PC board should

be 0.032" or less in thickness.

Multiple vias should be placed

near the ground leads. Failure to

properly ground this device can

lead to positive return gain and

possible stability problems. We

suggest performing a stability

analysis using the device s

parameters and a description of

the inductance of your ground

path. A recommended board

layout is shown on the final page

of this data sheet. Pins 7 and 8

also provide the primary thermal

path for heatsinking the device.

VCC1 (pin 2):

This pin provides the DC bias for

the amplifier driver stages, and

has an operating range of 4.5 to 6

V (5 V nominal). It should be

bypassed close to RFIC body

using a 1000 pF capacitor.

RFin (pin 4):

The impedance of this RFIC is

well matched to 50

Ω from 100

MHz to 1100 MHz. Normally, no

additional impedance matching is

required. S-parameters are

provided should the designer need

to “fine tune” the input match. Pin

4 must be AC coupled to

generator (1000 pF typ. blocking

capacitor). The nominal drive

level is -6 dBm, and under normal

operating conditions should not

exceed 0 dBm.

Control (pin 5):

Applying a DC voltage to this pin

adjusts the gain of the last 2

stages of the RFIC over a 50 dB

range. Pin 5 has an operational

range of 0 to 2.5 V. The power

control function is designed for

operation in the 800 - 1000 MHz

frequency range, and decreases in

adjustment capability at lower

frequencies – refer to the

performance graphs (figure 3).

RFout and VCC2 (Pin 6):

Pin 6 connects to the open collec-

tor of the output stage. A power

match is required at this pin. The

typical match for operation

between 800 and 1000 MHz

consists of a shunt L (8 nH typ.)

and a series C (27 pF typ.), with

the series C also serving as the

blocking capacitor. The s

parameter data should be used to

generate matches for other

frequency bands.

Figure 1. HPMX-3002 Typical 900 MHz Amplifier Use.

27 pF

TRANSMISSION LINES ARE 50

Ω

PIN:

1000 pF

RFIN (50 Ω)

1000 pF

VCC1

(4 TO 6 V,

65 mA NOM.)

VCC2

(4 TO 8 V,

95 mA NOM.)

1000 pF

8 nH

RFOUT (50 Ω)

OUTPUT POWER

CONTROL VOLTAGE

(2.2 V, 2.5 mA TYP.)

HPMX-3002 Fiches technique(PDF) 3 Page - Agilent(Hewlett-Packard)

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