The ADL5519 is a dual-demodulating logarithmic amplifier that incorporates two AD8317s. It can accurately convert an RF input signal into a corresponding decibel-scaled output. The ADL5519 provides accurately scaled, independent, logarithmic output volt-ages for both RF measurement channels. The device has two additional output ports, OUTP and OUTN, that provide the measured differences between the OUTA and OUTB channels. The on-chip channel matching makes the log amp outputs insensitive to temperature and process variations.

The temperature sensor pin provides a scaled voltage that is proportional to the temperature over the operating temperature range of the device.

The ADL5519 maintains accurate log conformance for signals from 1 MHz to 8 GHz and provides useful operation to 10 GHz. The ±3 dB dynamic range is typically 62 dB and has a ±1 dB dynamic range of >50 dB (re: 50 Ω). The ADL5519 has a response time of 6 ns/8 ns (fall time/rise time) that enables RF burst detec-tion to a pulse rate of greater than 50 MHz. The device provides unprecedented logarithmic intercept stability vs. ambient temperature conditions. A supply of 3.3 V to 5.5 V is required to power the device. Current consumption is typically 60 mA, and it decreases to less than 1 mA when the device is disabled.

The device is capable of supplying four log amp measurements simultaneously. Linear-in-dB measurements are provided at OUTA and OUTB with conveniently scaled slopes of −22 mV/dB. The log amp difference between OUTA and OUTB is available as differ-ential or single-ended signals at OUTP and OUTN. An optional voltage applied to VLVL provides a common-mode reference level to offset OUTP and OUTN above ground. The broadband output pins can support many system solutions.

Any of the ADL5519 output pins can be configured to provide a control voltage to a variable gain amplifier (VGA). Special attention has been paid to minimize the broadband noise of the output pins so that they can be used for controller applications.

The ADL5519 is fabricated on a SiGe bipolar IC process and is available in a 5 mm × 5 mm, 32-lead LFCSP with an operating temperature range of −40°C to +125°C.

Applications

RF Power Amplifier linearization & Gain/Power control

Power monitoring in radio link transmitters

Dual-channel wireless infrastructure radios

Antenna VSWR monitor

RSSI measurement in base stations, WLAN, WiMAX, Radar

Data Sheet, Rev. 0, 1/08

Part#	RF Frequency (MHz)	Dynamic Range (dB)	Temp Stability (dB)	Response Time (ns typ)	Voltage Supply (V)	Supply Current (max)	Package	Price* (1000-4999)
AD606	-	80	-	400	4.5 to 5.5	13	16-Lead DIP, 16-Lead SOIC	$21.74
AD640	-	50	±1	10	+/- 4.5 to +/- 7.5	44	20-Lead DIP, 20-Lead LCC, 20-Lead PLCC	$36.05
AD641	-	44	±1	10	+/- 4.5 to +/- 7.5	44	20-Lead DIP, 20-Lead LCC, 20-Lead PLCC	$32.43
AD8302	2,700	60	±1	60	2.7 to 5.5	19	14-Lead TSSOP	$12.00
AD8306	5 to 400	100	±1	73	2.7 to 5.5	16	16-Lead SOP	$14.50
AD8307	dc to 500	92	±1	400	2.7 to 5.5	8	8-Lead SOIC/DIP	$6.00
AD8309	5 to 500	100	±1	67	2.7 to 5.5	16	16-Lead TSSOP	$7.75
AD8310	dc to 440	100	±1	15	2.7 to 5.5	8	8-Lead SOIC	$3.95
AD8311	100 to 2500	50	±0.5	150	2.7 to 5.5	8.5	WLCSP	$1.25
AD8312	50 to 3500	45	±0.5	70	2.7 to 5.5	4.2	WLCSP	$1.25
AD8313	100 to 2500	70	±1.25	40	2.7 to 5.5	14	8-Lead uSOIC	$7.90
AD8314	100 to 2700	45	±1	70	2.7 to 5.5	4.5	8-Lead uSOIC/CSP	$1.09
AD8315	100 to 2500	50	±1	150	2.7 to 5.5	8.5	8-Lead uSOIC	$3.95
AD8316	100 to 2500	49	±1	50	2.7 to 5.5	8.5	16-Lead CSP	-
AD8317	1 to 10000	55	±0.5	6	3 to 5.5	20	8-Lead CSP	$3.93
AD8318	1 to 8000	70	±0.5	10	4.5 to 5.5	68	16-Lead CSP	$4.99
AD8319	1 to 10000	45	±0.5	6	3 to 5.5	22	8-Lead CSP	$1.75
ADL5519	1 kHz to 10000	62	±0.5	6	3 to 5.5	56	32-Lead LFCSP	$4.98

* 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.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

The model number is a specific version of a generic that can be purchased or sampled.

Status indicates the current lifecycle of the product. This can be one of 4 stages:

• Pre-Release: The model has not been released to general production, but samples may be available.
• Production: The model is currently being produced, and generally available for purchase and sampling.
• Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
• Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).

The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

This is the acceptable operating range of the device. The various ranges specified are as follows:

• Commercial: 0 to +70 degrees Celsius
• Military : -55 to +125 degrees Celsius
• Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
• Automotive: -40 to +125 degrees Celsius

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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