RF2512

RF2512 11 Typical Applications • Single- or Dual-Channel LO Source • FM/FSK Transmitter • Wireless Data Transmitters • 433/868/915MHz ISM Band Systems • Wireless Security Systems UHF TRANSMITTER Product Description The RF2512 is a monolithic integrated circuit intended for use as a low-cost frequency synthesizer and transmitter. The device is provided in a 24 pin SSOP package and is designed to provide a phased locked frequency source for use in local oscillator or transmitter applications. The chip can be used in FM or FSK applications in the U.S. 915MHz ISM band and European 433MHz or 868MHz ISM band. The integrated VCO, dual-modulus/dual-divide (128/129 or 64/65) prescaler, and reference oscillator require only the addition of an external crystal to provide a complete phase-locked oscillator. A second reference oscillator is available to support two channel applications. 0.157 0.150 0.0098 0.0040 1 0.344 0.337 0.012 0.008 0.025 0.0688 0.0532 0.2440 0.2284 8°MAX 0°MIN 0.050 0.016 0.0098 0.0075 Optimum Technology Matching® Applied ü Package Style: SSOP-24 Si BJT Si Bi-CMOS GaAs HBT SiGe HBT GaAs MESFET Si CMOS Features • Fully Integrated PLL Circuit • 15mW Output Power at 433MHz 11 TRANSCEIVERS LOOP FLT RESNTR+ RESNTR- LVL ADJ OSC B1 OSC B2 MOD IN VREF P OSC E • 2.7V to 5.0V Supply Voltage • Low Current and Power Down Capability • 300MHz to 1000MHz Frequency Range • Narrowband and Wideband FM 7 Gain Control 16 18 20 23 13 3 2 1 TX OUT 8 Phase Detector & Charge Pump Ref. Select 24 12 OSC SEL PRESCL OUT MOD CTRL DIV CTRL Prescaler 128/129 or 64/65 14 15 Ordering Information RF2512 RF2512 PCBA-L RF2512 PCBA-M RF2512 PCBA-H UHF Transmitter Fully Assembled Evaluation Board, 433MHz Fully Assembled Evaluation Board, 868MHz Fully Assembled Evaluation Board, 915MHz Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com Functional Block Diagram RF Micro Devices, Inc. 7625 Thorndike Road Greensboro, NC 27409, USA Rev B9 010509 11-11 RF2512 Absolute Maximum Ratings Parameter Supply Voltage Power Down Voltage (VPD) Operating Ambient Temperature Storage Temperature Rating -0.5 to +5.5 -0.5 to VCC -40 to +85 -40 to +150 Unit VDC V °C °C Caution! ESD sensitive device. RF Micro Devices believes the furnished information is correct and accurate at the time of this printing. However, RF Micro Devices reserves the right to make changes to its products without notice. RF Micro Devices does not assume responsibility for the use of the described product(s). Parameter Overall Frequency Range Modulation Modulation Frequency Maximum FM Deviation Specification Min. Typ. Max. 300 to 1000 FM/FSK 2 200 64/65 or 128/129 4/PLL BW -80 -100 TBD -40 +7 15 10 50 1.5:1 4 -23 +12 +6 17 100 +40 Unit MHz MHz kHz Condition T=25 °C, VCC =3.6V, Freq=915MHz Dependent upon Supply Voltage PLL and Prescaler Prescaler Divide Ratio PLL Lock TIme PLL Phase Noise Reference Frequency Max Crystal RS Charge Pump Current ms dBc/Hz dBc/Hz MHz Ω µA dBm dBm dB dB/V Ω kΩ dBc dBc V V kΩ ms ms V V mA mA mA µA The PLL lock time, from power up, is set externally by the bandwidth of the loop filter. 10kHz Offset, 10kHz loop bandwidth 100kHz Offset, 10kHz loop bandwidth Transmit Section Maximum Power Level Power Control Range Power Control Sensitivity Antenna Port Impedance Antenna Port VSWR Modulation Input Impedance Harmonics Spurious Freq=433MHz Freq=915MHz TX ENABL=“1” TX Mode 11 TRANSCEIVERS Compliant to Part 15.249 and I-ETS 300 220 Voltage supplied to the input; device is “ON” Voltage supplied to the input; device is “OFF” From Change in OSC SEL,7.075MHz XTAL From Change in OSC SEL,7.075MHz XTAL Specifications Operating limits TX Mode, LVL ADJ=3.6V TX Mode, LVL ADJ=0V PLL Only LVL ADJ=0V, PLL ENABL=0V, TX ENABL=0V, OSC SEL=0V Power Down Control Logic Controls “ON” Logic Controls “OFF” Control Input Impedance Turn On Time Turn Off Time 2.0 1.0 25 5+4/PLL BW TBD 3.6 2.7 to 5.0 28 10 8 1 Power Supply Voltage Current Consumption 11-12 Rev B9 010509 RF2512 Pin 1 Function OSC B2 Description This pin is connected directly to the reference oscillator transistor base. The intended reference oscillator configuration is a modified Colpitts. An appropriate capacitor as chosen by the customer should be connected between pin 1 and pin 2. This pin is connected directly to the emitter of the reference oscillator transistor. An appropriate capacitor as chosen by the customer should be connected from this pin to ground. This pin is connected directly to the reference oscillator transistor base. The intended reference oscillator configuration is a modified Colpitts. An appropriate capacitor as chosen by the customer should be connected between pin 3 and pin 2. This pin is used to power up or down the VCO and PLL. A logic high (PLL ENABL>2.0V) powers up the VCO and PLL electronics. A logic low (PLL ENABL2.0V powers up all transmitter functions. TX ENABL2.0V) applied to this pin powers on reference oscillator 2 and powers down reference oscillator 1. A logic low (OSC SEL