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SA900 Datasheet(PDF) 2 Page - NXP Semiconductors |
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SA900 Datasheet(HTML) 2 Page - NXP Semiconductors |
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2 / 20 page  Philips Semiconductors Preliminary specification SA900 I/Q transmit modulator DO NOT DISTRIBUTE WITHOUT ECN DATED AFTER Sept 16, 1997 2 1997 Sept 16 853- 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 • V CC = 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 45 46 47 48 1 2 3 4 5 6 7 13 14 15 16 17 18 19 25 26 27 28 29 30 42 43 44 31 32 33 34 35 36 20 21 22 23 24 8 9 10 11 12 39 40 41 37 38 GND TXLO_2 TXLO_1 GND Vcc TANK_1 TANK_2 Vcc PHSOUT GND XTAL_1 Vcc GND DUALTX GND Vcc AMPSTX GND Vcc GND Vcc Vcc GND IPEAK SR00636 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) ORDERING INFORMATION DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG # 48-Pin Plastic Low Profile Quad Flat Package (LQFP) -40 to +85 °C SA900BE SOT313-2 |
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