RF2368PCBA datasheet(3/8 Pages) RFMD

3 / 8 page

Preliminary

4-201

RF2368

Rev A0 010503

Function

Description

Interface Schematic

1BIAS

BIAS is set to the supply voltage at high gain mode. For bypass mode

see “Application Notes”.

2GND

3IN

DCS1800/PCS1900 RF input pin.

4GND1

LNA1 emittance inductance. Total inductance is comprised of

package+bondwire+L2 on PCB.

5VCC

Open collector for first stage LNA of DCS1800/PCS1900. It must be

biased to VCC through a choke or matching inductor.

6GND2

LNA2 emittance inductance. Total inductance is comprised of

package+bondwire+L4 on PCB.

7OUT

DCS1800 Amplifier Output pin. This pin is an open-collector output. It

must be biased to VCC through a choke or matching inductor. This pin

is typically matched to 50

Ω with a shunt bias/matching inductor and

series blocking/matching capacitor. Refer to application schematics.

SELECT

This pin selects high gain.

Select < 0.8V, high gain.

Select > 1.8V, low gain.

BIAS

RF IN

VCC1

To Bias

Circuit

GND1

VCC1

GND1

RF OUT

GND2

SELECT

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