SA900 查看數據表（PDF） - Philips Electronics

零件编号

产品描述 (功能)

比赛名单

SA900

I/Q transmit modulator

Philips Electronics 

Philips Semiconductors

I/Q transmit modulator

Preliminary specification

SA900

DO NOT DISTRIBUTE WITHOUT ECN DATED AFTER Sept 16, 1997

DESCRIPTION

The SA900 is a monolithic high performance, multi-function transmit

modulator for use in cellular radio applications, fabricated in QUBiC

BiCMOS technology. The SA900 features both analog (AMPS)

mode and complex, I/Q digital (NADC IS–136) mode quadrature

modulation functions, a PLL synthesizer with VCO, crystal oscillator,

programmable prescalers and Gilbert cell multiplier phase detector

with programmable charge pump output. The DUALTX output can

be used in DUAL mode cellular phone applications with the AMPS

and NADC modulation being applied to the I/Q baseband inputs.

The DUALTX output also provides 6-bit power control with 40dB of

gain control in 0.63dB steps. In addition, buffered crystal oscillator

programmable prescaler outputs are provided to support system

clock reference needs. Programming of the SA900 functions are

realized by a high speed 3-wire serial interface. The SA900 can be

programmed into a sleep mode (low current mode providing crystal

oscillator and Master Clock functions), a standby mode (providing

crystal oscillator, Master Clock, System Clock 1 and Transmit LO

buffer functions), and the AMPS mode and the DUAL mode

configurations.

FEATURES

• VCC = 4.0V

• Tx output frequency = 900MHz

• Direct modulation of RF

• DUAL mode, on-chip PA control

• I/Q modulator

• Single sideband quadrature LO generation with no external

adjustments required

• On-chip crystal oscillator with 3 buffered outputs

• AMPS/TACS compatible

• On-chip VCO

PIN CONFIGURATION

BE Package

48 47 46 45 44 43 42 41 40 39 38 37

GND 1

TXLO_2 2

TXLO_1 3

GND 4

Vcc 5

TANK_1 6

TANK_2 7

Vcc 8

PHSOUT 9

IPEAK 10

GND 11

XTAL_1 12

13 14 15 16 17 18 19 20 21 22 23 24

36 Vcc

35 GND

34 DUALTX

33 GND

32 Vcc

31 AMPSTX

30 GND

29 Vcc

28 GND

27 Vcc

26 Vcc

25 GND

Figure 1. Pin Configuration

• Selective power-down

– Low power AMPS/TACS mode

– Low power dual mode NADC

• 48-Pin TQFP package

APPLICATIONS

• North American Digital Cellular (TDMA IS-136)

SR00636

ORDERING INFORMATION

DESCRIPTION

48-Pin Plastic Low Profile Quad Flat Package (LQFP)

TEMPERATURE RANGE

-40 to +85°C

ORDER CODE

SA900BE

DWG #

SOT313-2

1997 Sept 16

2

853-

Share Link: