Intersil PRISM-FULLDUPLEX Datasheet

2-1

PRELIMINARY

PRISM™

Full Duplex Radio Front End

For Voice and Data

The Intersil PRISM® Full Duplex Radio Front End Chip Set is a highly integrated 7 chip solution for RF modems or transceivers employing quadrature

modulationanddemodulation.Significant integration of independent transmit and receive functions employ sev en ICs . The Receiv e chain consists of: The HF A3424/21, two high performance, low noise LNA’s which cover the 1.7GHz to 2.7GHz range; the HFA3661, a full frequency range combined second LNA/down converter mixer with an LNA bypass mode; the HFA3761,a 10MHz to 400MHz, 82dB IF AGC amplifier with 76dB of dynamic range, integrated with a quadrature demodulator and selectable low pass filters.

The Transmit chain includes: The HFA3763, a 10MHz to 400MHz quadrature modulator integrated with selectable low pass shaping ﬁlters and an output stage with a gain control range from 8dB to -35dB; the HFA3663/64 are two IF to RF upconverters integrated with an output RF AGC ampliﬁer with gain control range of 20dB to -10dB; and the HFA3925/26, two monolithic RF power ampliﬁers. To complete the set, Intersil offers a dual synthesizer for RF and IF local oscillator applications, the HFA3524. Each of these functions may be used individually or in any combination of a variety of RF modem applications.

This chip set is intended to support a variety of full duplex radio applications that employ modulation and demodulation architectures requiring highly linear analog processing schemes. Intersil also offers a complete line of high speed A/D and D/A converters that can interface with this Full Duplex Chip Set.

Features

• Provides Antenna-to-I/Q Baseband Stream

• Low Voltage Operation from 2.7V to 5.5V

• 1.7GHz - 2.7GHz ISM Band Operation

• Single Heterodyne Conversion

• Programmable Antialiasing and Shaping Filters

• 10MHz to 400MHz IF Operation with AGC

• Transmit Variable Gain Range . . . . . . . . . . . . . . . . . .60dB

• Receive AGC Range . . . . . . . . . . . . . . . . . . . . . . . . .76dB

• Chip Rates to 22M Chip/s

• Power Management Control

• Low Proﬁle PCMCIA-Compatible Surface Mount Packaging

Applications

• Wireless Local Loop Systems

• PCMCIA Wireless Transceivers

• WLAN RF Modems

• TDMA/CDMA Radios

• Part 15 Compliant Radio Links

• Full Duplex Point To Point Transceivers

• PCM Repeater/Transceivers

Typical Application Diagram

SYNTHESIZER

LNA BPF

RF/IF

CONVERTER

IF AGC

LPF

QMODEM

IF/RF

CONVERTER

BASEBAND

FILTER

SYNTHESIZER

HFA3421

HFA3661

HFA3524/A

HFA3663 (File #4241)

HFA3925

HFA3761 (File #4236)

HFA3763

LPF

AGC

LPF

QMODEM

LPF

D/A

PA BPF

HFA3664 (File #4242)

(File #4240)

(File #4062)

HFA3524

(File #4062)

(File #4132)

(File #4288)

(File #4237)

PRISM™ FULL DUPLEX RADIO CHIP SET, FILE #4238

A/D

PRISM™ FULL DUPLEX CHIP SET

AGC

LNA

IF LO1

IF LO2

RF LO1

RF LO2

D U P L E X E R

OPTIONAL WHEN IN ANALOG MODE

HFA3424

(File #4131)

HFA3926

(File #4282)

Data Sheet February 1997 File Number 4238.1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

PRISM is a registered trademark of Intersil Corporation. PRISM logo is a trademark of Intersil Corporation.