SA1920 datasheet(2/36 Pages) PHILIPS

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Philips Semiconductors

Product specification

SA1920

Dual-band RF front-end

1999 Mar 02

853–2057 20918

DESCRIPTION

The SA1920 is an integrated dual-band RF front-end that operates

at both cellular (AMPS, GSM and TDMA) and PCS/DCS (TDMA and

GSM) frequencies, and is designed in a 13 GHz fT BiCMOS

process—QUBiC1. The low-band is a combined low-noise amplifier

(LNA) and mixer. The LNA has a 1.7 dB noise figure at 881 MHz

with 17.5 dB of gain and an IIP3 of –5 dBm. The wide-dynamic

range mixer has a 10 dB noise figure at 881 MHz with 9.5 dB of gain

and an IIP3 of +5 dBm.

The high-band contains a receiver front-end, doubler and a high

frequency transmit mixer intended for closed loop transmitters. One

advantage of the high-band architecture is an image-rejection mixer

with over 30 dB of image rejection; thus, eliminating external filter

cost while saving board space. The system noise figure is 4.2 dB at

1960 MHz with a power gain of 23.5 dB and an IIP3 of –12.5 dB.

FEATURES

• Low current consumption

• Outstanding low- and high-band noise figure

• Excellent gain stability versus temperature and supply

• Image reject high-band mixer with over 30 dB of rejection

• Increased low-band LNA gain compression during analog

transmission

• LO input and output buffers

• Frequency doubler

• On chip logic for network selection and power down

• Very small outline package

APPLICATIONS

• 800 to 1000 MHz analog and digital receivers

• 1800 to 2000 MHz digital receivers

• Portable radios

• Digital mobile communications equipment

PIN CONFIGURATION

SR01435

Tx ON

HIGH BAND IMAGE SET I

HIGH BAND LO INPUT

GND

LOW BAND LO INPUT

GND

HIGH BAND IMAGE SET Q

N/C

X2 ON

N/C

GND

MIX IN

GND

Tx IF A

N/C

V CC

Tx IF B

GND

Tx A

Tx B

GND

VCC

Figure 1.

Pin Configuration

ORDERING INFORMATION

TYPE NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

SA1920

LQFP48

Plastic low profile quad flat package; 48 leads; body 7x7x1.4 mm

SOT313-2

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