RF2850 0 DIRECT QUADRATURE MODULATOR RoHS Compliant & Pb-Free Product Typical Applications * UMTS Base Stations * WLAN and WLL Systems * CDMA Base Stations * GMSK,QPSK,DQPSK,QAM Modulation * GSM-EDGE/EGSM Base Stations Product Description The RF2850 is a direct quadrature modulator for use in base stations and other communications systems. RF2850 supports PCS, GSM, EDGE, CDMA2000, and UMTS standards. This device features a narrow-band operation at 1700MHz to 2500MHz with excellent carrier and sideband suppression and ultra low noise floor. The device is manufactured on an advanced GaAs HBT process. The RF2850 operates from a single 5V supply and is packaged in a low cost 4mmx4mm 16-pin leadless package. 2 PLCS 0.10 C A -A- 0.05 C 0.90 0.85 4.00 SQ. 0.70 0.65 2.00 TYP 0.05 0.00 0.10 C B 2 PLCS 12 MAX 0.10 C B 2 PLCS -B- -C- 1.87 TYP 3.75 SQ SEATING PLANE Shaded lead is pin 1. 0.10 C A 2 PLCS Dimensions in mm. 0.10 M C A B 0.60 0.24 TYP 0.35 0.23 Pin 1 ID 0.20 R 2.25 SQ. 1.95 0.75 TYP 0.50 0.65 Optimum Technology Matching(R) Applied 9GaAs HBT Si BJT Package Style: QFN, 16-Pin, 4x4 GaAs MESFET Si Bi-CMOS SiGe HBT Si CMOS InGaP/HBT GaN HEMT SiGe Bi-CMOS Features * Typical Carrier Suppression>40dBc VCC QREF QSIG GND * Typical Sideband Suppression>40dBc 16 15 14 13 GND 1 * Noise Floor better than -158dBm/Hz * Single 5V Power Supply 12 RFOUT LO 2 11 GND -45 +45 LOREF 3 10 VCC 5 6 7 8 IREF ISIG GND 9 RFREF VCC GND 4 Functional Block Diagram Rev A0 050616 Ordering Information RF2850 RF2850 PCBA Direct Quadrature Modulator Fully Assembled Evaluation Board RF Micro Devices, Inc. 7628 Thorndike Road Greensboro, NC 27409, USA Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com 5-51 RF2850 Absolute Maximum Ratings Parameter Supply Voltage LO Input Operating Temperature Storage Temperature Rating Unit -0.5 to +5.3 +10 -40 to +85 -65 to +150 V dBm C C Caution! ESD sensitive device. RF Micro Devices believes the furnished information is correct and accurate at the time of this printing. RoHS marking based on EUDirective2002/95/EC (at 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). Specification Unit Min. Typ. Max. High Band Performance (1900MHz) with CW Baseband Inputs Parameter Condition LO Input Port LO Drive Level LO Input Impedance LO Port Return Loss -5 50 13 dBm dB Modulation Input Frequency Range Reference Voltage Baseband Input Level DC 250 2.05 0.25 I/Q Signal Input Impedance Bandwidth (-1dB) Input Bias Current 200 40 130 40 MHz V VP-P kHz k MHz A Baseband common mode voltage 0.25VP-P per pin, 500mV VP-P differential, I/Q in quadrature CW baseband signal Measured at DC 500mV VP-P differential, I/Q at 2.05V DC I/Q Modulator Output RF Frequency Range RF Output Power RF Output Return Loss RF Output P1dB Carrier Suppression Carrier Suppression Sideband Suppression IM3 Suppression 1700 Output IP3 Broadband Noise Floor 15 4 20 35 30 2500 -6 15 5 25 55 45 52 20 -158 -156 MHz dBm dB dBm dBc dBc dBc dBc dBm dBm/Hz T=25C, VCC =5V Unadjusted (see note) Adjusted. T=-40C to +85C Unadjusted Two tone baseband input @ 500mVP-P differential per tone 20MHz offset from LO, all IQ input at bias of 2.05V DC Parameters Supply Voltage 5.0 V Specification V Operating limits Supply Current 60 mA Note: 20dBc limit for unadjusted carrier suppression is applicable for differential I and Q inputs only. 4.75 5-52 5.25 Rev A0 050616 RF2850 Specification Unit Min. Typ. Max. High Band Performance with PCS CDMA and W-CDMA Baseband Inputs Parameter Condition W-CDMA 3GPP Channel Power -13 dBm 3.84MHz integrated bandwidth, ESG-D with LPF ACPR @ 1960MHz SNR @ 1960MHz ACPR @ 2140MHz SNR @ 2140MHz Noise Floor @ 20MHz Offset -68 -74 -65 -74 -156 -62 -70 -62 -70 -155 dBc dBc dBc dBc dBm/Hz -13 -72 -70 dBm dBc 1.2288MHz integrated bandwidth 30kHz integrated bandwidth dBm 1MHz integrated bandwidth at adjacent channel 20MHz offset from LO PCS CDMA Channel Power ACPR @ 1960MHz W-CDMA 1MHz BW Channel Power -14 ACPR @ 2140MHz SNR @ 2140MHz Noise Floor @ 20MHz Offset -74 -85 -157 Rev A0 050616 -71 -82 -156 dBc dBc dBm/Hz 20MHz offset from LO 5-53 RF2850 Pin 1 2 Function GND LO 3 4 5 6 LOREF GND VCC I REF 7 8 9 10 11 12 I SIG GND RFREF VCC GND RF OUT Description Interface Schematic Ground connection. LO input signal. This pin has an internal DC-blocking capacitor. This port is voltage-driven so matching at different frequencies is generally not required. The reference end of local oscillator. LO Ground connection. Power supply. An external capacitor is required. Reference voltage for the I mixer. The DC voltage should be the same as the DC supplied to I SIG (pin 7). See pin 7 for more information. The SIG and REF inputs are inputs of a differential amplifier. Therefore, the REF and SIG inputs are interchangeable. If swapping the I SIG and I REF pins, the Q SIG and Q REF also need to be swapped to maintain the correct phase. It is also possible to drive the SIG and REF inputs in a differential mode which will increase gain. Baseband input to the I mixer. This pin is DC-coupled. The input drive level determines output power and linearity performance. For better carrier/sideband suppression and dynamic range, the drive level should be as high as possible to meet the required linearity performance. The recommended DC level for this pin is 2.05V. VCC 2 pF VCC 2 pF Ground connection. The reference end of RF input. Power supply. An external capacitor is required. Ground connection. RF Output. This pin has an internal DC-blocking capacitor. At some frequencies, external matching may be needed to optimize output power. RF OUT 13 14 15 GND Q SIG Q REF Ground connection. Baseband input to the Q mixer. This pin is DC-coupled. The input drive level determines the output power and linearity performance. For better carrier/sideband suppression and dynamic range, the drive level should be as high as possible to meet the required linearity performance. The recommended DC level for this pin is 2.05V. VCC 2 pF Reference voltage for the Q mixer. See pin 14 for more information. VCC 2 pF 16 Pkg Base 5-54 VCC GND Power supply. An external capacitor is required. Ground connection. Rev A0 050616 RF2850 Evaluation Board Schematic 1700MHz to 2500MHz (Differential Drive) 50 strip J2 QREF 50 strip J4 QSIG VCC1 C9 100 pF 16 L1 1 nH 15 14 1 12 2 11 J1 LO X1 2.1 GHz 50 strip +45 3 10 4 9 5 6 50 strip C14 0.5 pF J6 RF OUT -45 L2 1 nH C12 3.9 pF 13 7 C13 3.9 pF X2 2.1 GHz 8 VCC VCC2 C10 100 pF J3 IREF 50 strip 50 strip P1 L3 100 nH VIN J5 ISIG VCC1 C1 2.2 pF L4 100 nH VCC2 C3 100 pF Rev A0 050616 5-55 RF2850 Evaluation Board Layout Board Size 2.00" x 2.00" Board Thickness 0.042" (10%), Board Material FR-4 5-56 Rev A0 050616