RF2909 데이터 시트보기 (PDF) - RF Micro Devices

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RF2909

3V 915MHZ SPREAD-SPECTRUM TRANSMITTER IC

RF Micro Devices 

11

Typical Applications

• Direct Sequence Spread Spectrum

• Spread Spectrum Cordless Phones

• Portable Battery Powered Equipment

RF2909

3V 915MHZ SPREAD-SPECTRUM

TRANSMITTER IC

• GMSK, QPSK, DQPSK, QAM Modulation

• 915MHz ISM Applications

Product Description

The RF2909 is a monolithic integrated transmitter IC

capable of universal direct modulation. The quadrature

modulator allows for a variety of modulation formats and

compound carriers. The transmitter has two power control

modes. Two inputs can be controlled digitally for stepping

output power 1mW, 10mW, or 70mW output power. Or,

the output level can be adjusted by an analog input from

1mW to 80mW. The quadrature mixers have differential

inputs, and are internally biased; a DC blocking capacitor

is required if external DC levels are present. The LO is

split with a passive network tuned for 915MHz.

.157

.150

1

.344

.337

.033

.012

.008

.025

.244

.228

8°MAX

0°MIN

.050 .010

.016 .008

.010

.004

.069

.053

Optimum Technology Matching® Applied

Si BJT

üSi Bi-CMOS

GaAs HBT

SiGe HBT

GaAs MESFET

Si CMOS

Q SIG 1

24 I SIG

Q REF 2

GND1 3

23 I REF

+45°

-45°

22 NC

NC 4

Σ

LO IN+ 5

21 GND6

20 GND5

LO IN- 6

19 RF OUT

NC 7

18 GND4

VCC1 8

17 GND3

GND2 9

VCC2 10

INSTGT 11

APC 12

DC

BIAS

16 PLLON

15 TX PD

PWR

CTRL

14 PC 2

13 PC1

Package Style: SSOP-24

Features

• 2.7V to 5V Power Supply

• 1mW, 10mW, 70mW Digital Output

Power

• 20dB Analog Power Control Range

• Excellent Phase & Amplitude Balance

• Compatible with the RF2908

Ordering Information

RF2909

3V 915MHz Spread-Spectrum Transmitter IC

RF2909 PCBA Fully Assembled Evaluation Board

Functional Block Diagram

RF Micro Devices, Inc.

7628 Thorndike Road

Greensboro, NC 27409, USA

Tel (336) 664 1233

Fax (336) 664 0454

http://www.rfmd.com

11

Rev B1 010904

11-103

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