PDF RF2449 Data sheet ( Hoja de datos )

Número de pieza	RF2449
Descripción	CDMA/FM LOW NOISE AMPLIFIER/MIXER 900MHZ DOWNCONVERTER
Fabricantes	RF Micro Devices
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Hay una vista previa y un enlace de descarga de RF2449 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas
No Preview Available ! Preliminary 8 Typical Applications • CDMA/FM Cellular Systems • Supports Dual-Mode CDMA/AMPS • Supports Dual-Mode CDMA/TACS RF2449 CDMA/FM LOW NOISE AMPLIFIER/MIXER 900MHZ DOWNCONVERTER • General Purpose Downconverter • Commercial and Consumer Systems • Portable Battery-Powered Equipment Product Description The RF2449 is a receiver front-end designed for the receive section of dual-mode CDMA/FM cellular applica- tions. It is designed to amplify and downconvert RF sig- nals, while providing 30dB of stepped gain control range. Features include digital control of LNA gain, mixer gain, LNA IIP3, and power down mode. Another feature of the chip is adjustable IIP3 of the LNA and mixer using an off- chip current setting resistor. The LNA IIP3 can be digitally controlled between two levels to reduce current draw in CDMA standby and other conditions where high IIP3 is not required. Noise Figure, IP3, and other specs are designed to be compatible with the IS-98 specification for CDMA cellular communications. The IC is manufactured on an advanced Silicon Bipolar process and packaged in an SSOP-24. Optimum Technology Matching® Applied Si BJT !Si Bi-CMOS GaAs HBT SiGe HBT GaAs MESFET Si CMOS ENABLE 1 IP SET 2 IF SEL 3 LNA GAIN 4 MIX GAIN 5 LNA IN 6 VCC1 7 GND1B 8 GND1A 9 LNA OUT 10 11 12 24 LO IN 23 GND2 22 GND2 21 VCC2 20 IF2+ 19 IF2- 18 BYPASS 17 IF1- 16 IF1+ 15 GND3A 14 MIX IN 13 GND3B Functional Block Diagram 0.157 0.150 1 0.344 0.337 0.2440 0.2284 8°MAX 0°MIN 0.012 0.008 0.025 0.0098 0.0040 0.0688 0.0532 0.050 0.0098 0.016 0.0075 Package Style: SSOP-24 Features • Complete Receiver Front-End • Stepped LNA/Mixer Gain Control • Adjustable LNA/Mixer Bias Current • Adjustable LNA/Mixer IIP3 • Digital LNA IIP3 Control • Meets IS-98 IMD and Single Tone Ordering Information RF2449 RF2449 PCBA CDMA/FM Low Noise Amplifier/Mixer 900MHz Downconverter Fully Assembled Evaluation Board RF Micro Devices, Inc. 7625 Thorndike Road Greensboro, NC 27409, USA Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com 8 Rev A4 001016 8-75 1 page Preliminary Pin Function Description 17 IF1- Second differential output pin for the first mixer. 18 BYPASS Bypass pin for the LO bias reference. 19 IF2+ First differential output pin for the second mixer. RF2449 Interface Schematic See pin 16. IF2- IF2+ 20 IF2- Second differential output pin for the second mixer. 21 VCC2 VCC pin for the LO circuits. 22 GND2 Ground pin for the LO circuits. 23 GND2 Ground pin for the LO circuits. 24 LO IN Local oscillator input pin. See pin 20. LO IN 8 Rev A4 001016 8-79 5 Page Preliminary 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 2.7 3.0 2.5 2.0 1.5 1.0 0.5 0.0 2.7 LNA - Noise Figure (Low Gain Mode) NF, -30º NF, 25º NF, 85º 2.8 2.9 3.0 3.1 VCC (V) LNA - Noise Figure (High Gain/High IP Mode) 3.2 3.3 NF, -30º NF, 25º NF, 85º 2.8 2.9 3.0 3.1 3.2 3.3 VCC (V) RF2449 3.0 2.5 2.0 1.5 1.0 0.5 0.0 2.7 LNA - Noise Figure (High Gain/Low IP Mode) NF, -30º NF, 25º NF, 85º 2.8 2.9 3.0 3.1 3.2 3.3 VCC (V) 8 Rev A4 001016 8-85 11 Page

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PDF Descargar	[ Datasheet RF2449.PDF ]

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