RF2140PCBA datasheet(8/12 Pages) RFMD

8 / 12 page

2-136

RF2140

Rev A12 011031

Application Schematic

Internal Schematic

AT_EN

RF IN

GND1

RF OUT

15 pF

RF IN

APC

5.1 pF

Note 1

Ωµstrip

1.0 pF

Note 1

15 pF

RF OUT

Quarter wave

length

15 pF

1.0 pF

1nF

15pF

Very closetopin 15/16

Distance center to

center of

capacitors is

0.220"

Instead of a

stripline an inductor

of ~6 nH can be

used

Instead of a

stripline an

inductor can be

used

Distance between

edge of device

and capacitor is

0.080"

Note: All capacitors are standard

0402 multi layer chip

Note 1: Using a hi-Q capacitor

will increase efficiency slightly

AT_EN

Distance between

edge of device

and capacitor is

0.240" to improve

the "off" isolation

3.9

Ω

RF IN

VCC

APC1

750

Ω

500

Ω

AT_EN

2.5k

Ω

320

Ω

1.5k

Ω

VCC1

GND1

GND2

APC1

500

Ω

2.5k

Ω

VCC

VCC2

RF OUT

APC2

200

Ω

1.5k

Ω

VCC

PKG BASE

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