RF2480(Rev_A3) Ver la hoja de datos (PDF) - RF Micro Devices

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RF2480
(Rev.:Rev_A3)

DIRECT QUADRATURE MODULATOR

RF Micro Devices 

RF2480

Pin

15

Function

Q SIG

Description

Baseband input to the Q mixer. This pin is DC-coupled. Maximum out-

put power is obtained when the input signal has a peak to peak ampli-

tude of 2V; for highly linear operation, the input signal (and output

power) must be reduced appropriately. The recommended DC level for

this pin is 3.0V. The peak minimum voltage on this pin (VREF - peak

modulation amplitude) should never drop below 2.0V. The peak maxi-

mum voltage on this pin (VREF + peak modulation amplitude) should

never exceed 4.0V. See pin 1 for more details.

Interface Schematic

Q SIG

100 Ω

Q REF

100 Ω

425 Ω 425 Ω

16

I SIG

Baseband input to the I mixer. This pin is DC-coupled. Maximum output

power is obtained when the input signal has a peak to peak amplitude

I SIG

I REF

of 2V; for highly linear operation, the input signal (and output power)

100 Ω

100 Ω

must be reduced appropriately. The recommended DC level for this pin

is 3.0V. The peak minimum voltage on this pin (VREF - peak modulation

amplitude) should never drop below 2.0V. The peak maximum voltage

on this pin (VREF + peak modulation amplitude) should never exceed

425 Ω 425 Ω

5

4.0V. See pin 1 for more details.

Application Schematic

DC-Coupled

IREF

100 nF

1

16

Q REF

2

15

100 nF

3

14

4

Σ

13

LO IN

5

12

VCC

6

-45°

11

+45°

100 nF

7

10

POWER

8

CONTROL

9

PD

100 nF

I SIG

Q SIG

VCC

100 nF

RF OUT

Rev A3 011019

5-33

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