RF2642PCBA-41X Ver la hoja de datos (PDF) - RF Micro Devices

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RF2642PCBA-41X

3V 900MHz UPCONVERTER/DRIVER AMPLIFIER WITH BYPASS MODE

RF Micro Devices 

RF2642

Pin Function Description

Interface Schematic

10

IF-

Balanced IF Input Pin. This pin is internally DC-biased and should be DC-

blocked if connected to a device with a DC level present. For single-ended IF+

IF-

input operation, one pin is used as an input and the other IF input is AC

coupled to ground. The input impedance is 250Ω in both the balanced and

single-ended modes.

BIAS

11

IF+

Same as pin 10, except complementary input.

12

GND

Ground connection. For best performance, keep traces physically short

and connect immediately to ground plane.

13

LO-

Balanced LO Input Pin. This pin is internally DC-biased and should be DC-

blocked if connected to a device with a DC level present. For single-ended LO+

LO

input operation, one pin is used as an input and the other LO input is AC

coupled to ground. The input impedance is 50Ω in both the balanced and

single-ended modes.

BIAS

14

15

16

Pkg

Base

LO+

VCC

GAIN SELECT

GND

Same as pin 13, except complementary input.

Supply voltage for all bias circuits and logic circuits.

When GAIN SELECT is high: the driver amplifier is switched to high gain

mode; both amplifier stages are active; the gain is maximized; and, the

entire device draws approximately 51mA. When GAIN SELECT is low, the

second stage of the PA driver is turned off and bypassed. This results in a

device current of 26mA, which is approximately a 50% current reduction.

The upconverting mixer remains on in both the high and low gain modes to

prevent VCO pulling.

Ground connection. The backside of the package should be soldered to a

top side ground pad which is connected to the ground plane with multiple

vias.

PD

Gain

Select

Mixer

Amplifier

First Stage

0

0

ON

OFF

0

1

ON

OFF

1

0

ON

ACTIVE

1

1

ON

ACTIVE

*See parameter specifications for conditions.

Amplifier

Second Stage

OFF

OFF

BYPASSED

ACTIVE

Gain

(dB)*

11.9

34.5

4 of 12

7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical

support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.

Rev A8 DS060925

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