The ADL5387 is a broadband quadrature I/Q demodulator that covers an RF/IF input frequency range from 50 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

QAM/QPSK RF/IF demodulators

W-CDMA/CDMA/CDMA2000/GSM

Microwave point-to-(multi)point radios

Broadband wireless and WiMAX

Broadband CATVs

Data Sheet, Rev. 0, 10/07

Part#	Function	RF Freq (MHz)	IQ Freq (MHz)	Phase Error (deg)	Amplitude Error (dB)	VGA Range (dB)	Noise Floor (dBm/Hz)	Voltage Supply (V)	Supply Current (max)	Package	Price* (1000-4999)
AD630	Demod, Mod	dc to 2	-	-	-	-	-	+/- 15	5	20-Lead DIP	$6.18
AD8333	Demod	dc to 50	-	0.1	0.05	-	-161	+/- 5	44	32-Lead LFCSP	$8.95
AD8339	Demod	dc to 50	50	1	0.25	-	-	4.5 to 5.5	35	40-Lead LFCSP	$11.95
AD8340	Vector Mod	700 to 1000	-	-	-	-	-	5	130	24-Lead LFCSP	$7.50
AD8341	Vector Mod	1500 to 2400	-	-	-	-	-150.5	4.75 to 5.25	125	24-Lead LFCSP	$7.50
AD8345	Mod	140 to 1000	80	0.5	0.2	-	-155	2.7 to 5.5	65	16-Lead Tssop	$4.96
AD8346	Mod	800 to 2500	70	1	0.2	-	-147	2.7 to 5.5	45	16-Lead Tssop	$4.40
AD8347	Demod	800 to 2700	65	1	0.3	69.5	-	2.7 to 5.5	64	28-Lead TSSOP	$5.78
AD8348	Demod	50 to 1000	75	0.5	0.25	45	-	2.7 to 5.5	58	28-Lead TSSOP	$4.95
AD8349	Mod	700 to 2700	160	0.3	0.1	-	-156	5	135	16-Lead Tssop	$4.96
ADL5370	Mod	250 to 1300	700	-	-	-	-156	4.75 to 5.5	210	24-Lead LFCSP	$4.98
ADL5371	Mod	700 to 1300	700	-	-	-	-156	4.75 to 5.5	175	24-Lead LFCSP	$4.98
ADL5372	Mod	1500 to 2500	700	-	-	-	-158	4.75 to 5.5	175	24-Lead LFCSP	$4.98
ADL5373	Mod	2300 to 3000	700	-	-	-	-156	4.75 to 5.5	175	24-Lead LFCSP	$4.98
ADL5374	Mod	2800 to 4000	700	-	-	-	-155	4.75 to 5.5	175	24-Lead LFCSP	$4.98
ADL5375	Mod	400 to 6000	500	-	-	-	-161	4.75 to 5.25	190	24-Lead LFCSP	$4.98
ADL5382	Demod	700 to 2700	370	0.2	0.05	-	-	4.75 to 5.25	220	24-Lead LFCSP	$5.22
ADL5385	Mod	50 to 2200	500	0.33	0.03	-	-160	4.75 to 5.5	215	24-Lead LFCSP	$4.98
ADL5387	Demod	50 to 2000	240	0.4	0.1	-	-	4.75 to 5.25	180	24-Lead LFCSP	$5.22
ADL5390	Vector Mod	20 to 2400	230	-	-	-	-147	5	130	24-Lead LFCSP	$7.50
ADL5590	Mod	869 to 960	-	-	-	-	-157	4.75 to 5.25	170	36-Lead LFCSP	-
ADL5591	Mod	1805 to 1990	-	-	-	-	-157	4.75 to 5.25	170	36-Lead LFCSP	-

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
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