ADL5387 30 MHz TO 2 GHz Quadrature Demodulator _ BDTIC a Leading Distributor in China

ADL5387 30 MHz TO 2 GHz Quadrature Demodulator

QAM/QPSK RF/IF demodulators W-CDMA/CDMA/CDMA2000/GSM Microwave point-to-(multi)point radios Broadband wireless and WiMAX Broadband CATVs

The ADL5387 is a broadband quadrature I/Q demodulator that covers an RF/IF input frequency range from 30 MHz to 2 GHz. With a NF = 13.2 dB, IP1dB = 12.7 dBm, and IIP3 = 32 dBm @ 450 MHz, the ADL5387 demodulator offers outstanding dynamic range suitable for the demanding infrastructure direct-conversion requirements. The differential RF/IF inputs provide a well-behaved broadband input impedance of 50 Ω and are best driven from a 1:1 balun for optimum performance.

Ultrabroadband operation is achieved with a divide-by-2 method for local oscillator (LO) quadrature generation. Over a wide range of LO levels, excellent demodulation accuracy is achieved with amplitude and phase balances ~0.05 dB and ~0.4°, 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 <−70 dBc. Differential dc-offsets at the I and Q outputs are <10 mV. Both of these factors contribute to the excellent IIP2 specifications > 60 dBm.

The ADL5387 operates off a single 4.75 V to 5.25 V supply. The supply current is adjustable with an external resistor from the BIAS pin to ground.

The ADL5387 is fabricated using the Analog Devices, Inc. advanced silicon-germanium bipolar process and is available in a 24-lead exposed paddle LFCSP.

Applications

Features and Benefits

Operating RF frequency
30 MHz to 2 GHz
LO input at 2 × f_LO60 MHz to 4 GHz
Input IP3: 31 dBm @ 900 MHz
Input IP2: 62 dBm @ 900 MHz
Input P1dB: 13 dBm @ 900 MHz
Noise figure (NF)
12.0 dB @ 140 MHz
14.7 dB @ 900 MHz

Voltage conversion gain > 4 dB
Quadrature demodulation accuracy
Phase accuracy ~0.4°
Amplitude balance ~0.05 dB
Demodulation bandwidth ~240 MHz
Baseband I/Q drive 2 V p-p into 200 Ω
Single 5 V supply

RF & Microwave

I/Q Demodulators

Reference Designs

Data Sheets

Document	note
ADL5387: 30 MHz to 2 GHz Quadrature Demodulator Data Sheet (Rev. C)	PDF 818.21 K

Application Notes

Document	note
AN-924: Digital Quadrature Modulator Gain (Rev. A)	PDF 105 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADL5387ACPZ-R2 Production	24 ld LFCSP (4x5mm w/2.30mm EP)	REEL 250	-40 to 85C	0	0	Y
ADL5387ACPZ-R7 Production	24 ld LFCSP (4x5mm w/2.30mm EP)	REEL 1500	-40 to 85C	0	5.28	Y
ADL5387ACPZ-WP Production	24 ld LFCSP (4x5mm w/2.30mm EP)	REEL 64	-40 to 85C	5.83	5.28	Y