ADL5382

700 MHz to 2.7 GHz Quadrature Demodulator ADL5382 FEATURES Operating RF and LO frequency: 700 MHz to 2.7 GHz Input IP3 33.5 dBm @ 900 MHz 30.5 dBm @1900 MHz Input IP2: >70 dBm @ 900 MHz Input P1dB: 14.7 dBm @ 900 MHz Noise figure (NF) 14.0 dB @ 900 MHz 15.6 dB @ 1900 MHz Voltage conversion gain: ~4 dB Quadrature demodulation accuracy Phase accuracy: ~0.2° Amplitude balance: ~0.05 dB Demodulation bandwidth: ~370 MHz Baseband I/Q drive: 2 V p-p into 200 Ω Single 5 V supply FUNCTIONAL BLOCK DIAGRAM CMRF CMRF RFIP RFIN CMRF VPX 24 VPA COM BIAS VPL VPL VPL 1 2 3 4 5 6 7 CML 8 9 10 11 CML 12 COM 0° 90° 23 22 21 20 19 18 VPB 17 VPB 16 QHI 15 QLO 14 IHI 13 ILO 07208-001 ADL5382 BIAS GEN LOIP LOIN CML Figure 1. APPLICATIONS Cellular W-CDMA/CDMA/CDMA2000/GSM Microwave point-to-(multi)point radios Broadband wireless and WiMAX GENERAL DESCRIPTION The ADL5382 is a broadband quadrature I-Q demodulator that covers an RF input frequency range from 700 MHz to 2.7 GHz. With a NF = 14 dB, IP1dB = 14.7 dBm, and IIP3 = 33.5 dBm at 900 MHz, the ADL5382 demodulator offers outstanding dynamic range suitable for the demanding infrastructure direct-conversion requirements. The differential RF inputs provide a well-behaved broadband input impedance of 50 Ω and are best driven from a 1:1 balun for optimum performance. Excellent demodulation accuracy is achieved with amplitude and phase balances ~0.05 dB and ~0.2°, respectively. The demodulated in-phase (I) and quadrature (Q) differential outputs are fully buffered and provide a voltage conversion gain of ~4 dB. The buffered baseband outputs are capable of driving a 2 V p-p differential signal into 200 Ω. The fully balanced design minimizes effects from second-order distortion. The leakage from the LO port to the RF port is