SA900BE datasheet(4/20 Pages) PHILIPS

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Philips Semiconductors

Preliminary specification

SA900

I/Q transmit modulator

1997 Sept 16

PIN DESCRIPTIONS

Description

Non-inverting I Mod Signal

Inverting I Mod Signal

TXLO_1/2

Second LO Input (differential/single-ended input)

DUALTX

RF output (850MHz) digital (DUAL) mode, complex modulated output

Non-inverting Q Mod Signal

Inverting Q Mod Signal

CLK1

Buffered oscillator output (XO

÷3/÷1)

MCLK

Buffered oscillator output (XO

÷4/÷5/÷1)

CLK2

Buffered oscillator output (XO

÷2/÷1)

AMPSTX

RF output (850MHz) AMPS mode

VCC

+5VDC power supply

GND

Ground

Data

Serial data input

Clock

Serial clock input

Strobe

Data strobe input

TXEN

AMPS and Dual Mode transmit enable

CLKSET

Program control pin for MCLK prescaler

XTAL1

Crystal oscillator base input

XTAL2

Crystal oscillator emitter output

PHSOUT

Phase comparator charge pump output

TANK_1

VCO differential tank

TANK_2

VCO differential tank

LO_1/2

Buffered differential TXLO output

IPEAK

Phase comparator current programming

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