RF2668

Preliminary RF2668 CDMA/FM TRANSMIT MODULATOR, IF AGC, AND UPCONVERTER WITH INTEGRATED PLL 5 Typical Applications • CDMA/FM Cellular and PCS Systems • Tri-Mode/Dual-Band CDMA Applications • W-CDMA Systems • Wireless Local Loop Systems • Spread-Spectrum Cordless Phones • High Speed Data Modems Product Description The RF2668 is an integrated complete quadrature modulator, IF AGC amplifier, upconverter, and PLL, designed for the transmit section of dual-mode CDMA/FM cellular, PCS, and tri-mode CDMA applications. It is designed to modulate baseband I and Q signals, amplify the resulting IF signals while providing 95dB of gain control range, and perform the final upconversion to UHF. Noise Figure, IP3, and other specifications are designed to be compatible with the IS-98 Interim Standard. This circuit is designed as part of RFMD’s newest CDMA chipset, which also includes the RF2667 CDMA/FM Receive IF AGC and Demodulator. The IC is manufactured on an advanced 18GHz FT Silicon Bipolar process, and is supplied in a 48-lead plastic LQFP package. Optimum Technology Matching® Applied 9.00 + 0.20 sq. 0.35 0.25 0.50 7.00 + 0.10 sq. 5 MODULATORS AND UPCONVERTERS 0.22 + 0.05 7° MAX 0° MIN 1.40 + 0.05 0.60 + 0.15 0.10 0.127 Package Style: LQFP-48_7x7 üSi Bi-CMOS MODE VCC3 BG 48 NC 1 NC 2 47 46 Band Gap Rel Si BJT GaAs HBT SiGe HBT VCO_EN PLLISET MIX_EN PLLON TX_EN GaAs MESFET Si CMOS VREFPLL OSCREF Features • Supports Tri-Mode Operation • Digitally Controlled Power Down Modes 45 44 43 42 41 40 39 38 37 36 SET2 35 PLLVCC Bias Supply /R Lock Detect Charge Pump SET1 CE • 2.7V to 3.3V Operation • Digital First LO Quadrature Divider • Double-Balanced UHF Upconvert Mixer • IF AGC Amp with 95dB Gain Control RFOUT 3 VCC4 4 /N LO2+ 5 LO2- 6 GND2 7 GND2 8 MIX_DEC 9 MIX IN+ 10 MIX IN- 11 NC 12 13 NC 14 MOD OUT15 MOD OUT+ 16 GND1 17 AGC_DEC 18 VGC 19 VCC2 20 GND1 21 QSIG 22 QREF 34 PLLGND 33 LD 32 DO 31 VCO+ 30 VCO29 LO1+ 28 LO1- Σ Quad /2 27 VCC1 26 VCO_ISET 25 NC Ordering Information RF2668 CDMA/FM Transmit Modulator, IF AGC, and Upconverter with Integrated PLL RF2668 PCBA-PCS/CEL Fully Assembled Evaluation Boards RF2668 PCBA-DO Fully Assembled Evaluation Boards RF Micro Devices, Inc. 7625 Thorndike Road Greensboro, NC 27409, USA Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com 23 IREF 24 ISIG Functional Block Diagram Rev B4 010423 5-71 RF2668 Absolute Maximum Ratings Parameter Supply Voltage Power Down Voltage (VPD) I and Q Levels, per pin LO1 Level, balanced Operating Ambient Temperature Storage Temperature Preliminary Rating -0.5 to +5 -0.5 to VCC + 0.7 1 +6 -40 to +85 -40 to +150 Unit VDC V VPP dBm °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 Specification Min. Typ. Max. Unit Condition T=25 °C, VCC =3.0V, ZLOAD =200 Ω, LO1=-10dBm @ 260MHz, IF=130MHz, I SIG=Q SIG=300mVPP, RF Output externally matched Balanced Balanced Per Pin 5 MODULATORS AND UPCONVERTERS I/Q Modulator & AGC I/Q Input Frequency Range I/Q Input Impedance I/Q Input Reference Level LO1/FM Frequency Range LO1/FM Input Level LO1/FM Input Impedance Sideband Suppression Carrier Suppression Max Output, FM Mode Max Output, CDMA Mode 0 to 20 80 1.3 0 -15 35 40 +2.5 -3 -2 Min Output, CDMA Mode Output Power Accuracy Adjacent Channel Power Rejection @ 885kHz Adjacent Channel Power Rejection @ 1.98MHz Output Noise Power Output Impedance Current Consumption -3 -2 -60 -69 -117 200 40 -111 -10 200 40 27 50 30 +5 0 0 -95 800 -5 MHz kΩ VDC MHz dBm Ω dBc dBc dBc dBc dBm dBm dBm dBm dB dB dBc dBc dBm/Hz Ω mA -89 +3 +2 Balanced I/Q Amplitude adjusted to within ± 20mV Unadjusted I/Q DC Offset adjusted to within ± 20mV Unadjusted VGC =2.4VDC, T=-20°C to +85°C VGC =2.4VDC, T=-20°C to +85°C, IS-95A CDMA Modulation ISIG=QSIQ=300mVpp@ 100kHz VGC =0.3VDC, T=-20°C to +85°C, IS-95A CDMA Modulation T=-20 to +85 °C, Ref=25 °C 1.4V ≤ GC ≤ 2.5 IS-95A CDMA Modulation POUT = -5dBm IS-95A CDMA Modulation POUT = -5dBm POUT = -1dBm, T=-20°C to +85°C Balanced I/Q modulator and AGC only. 5-72 Rev B4 010423 Preliminary Parameter UHF Upconverter General IF Input Impedance IF Input Frequency Range LO2 Input Impedance LO2 Input Level LO2 Input Frequency Range RF to LO2 Isolation LO Input VSWR Current Consumption Cellular Conversion Gain Noise Figure (SSB) Output IP3 200 0 -6 50 -3 30