ADL5382 Datasheet | Analog Devices

FEATURES Operating RF and LO frequency: 700 MHz to 2.7 GHz Input IP3 33.5 d Bm @ 900 MHz 30.5 d Bm @1900 MHz Input IP2: >70 d Bm @ 900 MHz Input P1d B: 14.7 d Bm @ 900 MHz Noise figure (NF) 14.0 d B @ 900 MHz 15.6 d B @ 1900 MHz Voltage conversion gain: ~4 d B Quadrature demodulation accuracy Phase accuracy: ~0.2° Amplitude balance: ~0.05 d B Demodulation bandwidth: ~370 MHz Baseband I/Q drive: 2 V p-p into 200 Ω Single 5 V supply APPLICATIONS Cellular W-CDMA/CDMA/CDMA2000/GSM Microwave point-to-(multi)point radios Broadband wireless and Wi MAX 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 d B, IP1d B = 14.7 d Bm, and IIP3 = 33.5 d Bm 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 d B 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 d B. The buffered baseband outputs are capable of driving a 2 V p-p differential signal into 200 Ω. 700 MHz to 2.7 GHz Quadrature Demodulator FUNCTIONAL BLOCK DIAGRAM CMRF CMRF RFIP RFIN CMRF VPX 24 23 22 21 20 19 VPA 1 2 BIAS GEN 18 VPB 17 VPB BIAS 3 VPL 4 0° 90° 16 QHI 15 QLO VPL 5 14 IHI VPL 6 13 ILO 9 10 11 12 CML LOIP LOIN CML CML Figure 1. 07208-001 The fully balanced design minimizes effects from second-order distortion. The leakage from the LO port to the RF port is <- 65 d Bc. Differential dc offsets at the I and Q outputs are typically <10 m V. Both of these factors contribute to the excellent IIP2 specifications which is >60 d Bm. The ADL5382 operates off a single 4.75 V to...