Datasheet ADL5519 (Analog Devices)

1 MHz to 10 GHz, 62 dB Dual Log Detector/Controller Data Sheet ADL5519 FEATURES FUNCTIONAL BLOCK DIAGRAM R R Wide bandwidth: 1 MHz to 10 GHz A R P M A A M M P Dual-channel and channel difference output ports CO CO VPS ADJA VPS TE CL VST 24 23 22 21 20 19 18 17 Integrated accurate scaled temperature sensor 62 dB dynamic range (±3 dB) ADL5519 TEMP >50 dB with ±1 dB up to 8 GHz INHA 25 16 NC Stability over temperature: ±0.5 dB (−40oC to +85oC) INLA 26 CHANNEL A 15 OUTA Low noise detector/controller outputs LOG DETECTOR Pulse response time: 6 ns/8 ns (fall time/rise time) COMR 27 14 FBKA Supply operation: 3.3 V to 5.5 V @ 60 mA PWDN 28 13 OUTP OUTA Fabricated using high speed SiGe process OUTB COMR 29 12 OUTN Small footprint, 5 mm × 5 mm, 32-lead LFCSP Operating temperature range: −40oC to +125oC COMR 30 11 FBKB CHANNEL B LOG DETECTOR INLB 31 10 OUTB APPLICATIONS INHB 32 9 NC RF transmitter power amplifier linearization and gain/power control BIAS Power monitoring in radio link transmitters 1 2 3 4 5 6 7 8 Dual-channel wireless infrastructure radios R R B F B B M E VL M P T
001 8- 19
Antenna VSWR monitor CO VPS ADJB VR VL CL VS CO
06
RSSI measurement in base stations, WLAN, WiMAX, radar
Figure 1.
GENERAL DESCRIPTION
The ADL5519 is a dual-demodulating logarithmic amplifier that temperature conditions. A supply of 3.3 V to 5.5 V is required incorporates two AD8317s. It can accurately convert an RF to power the device. Current consumption is typically 60 mA, input signal into a corresponding decibel-scaled output. The and it decreases to less than 1 mA when the device is disabled. ADL5519 provides accurately scaled, independent, logarithmic The device is capable of supplying four log amp measurements output voltages for both RF measurement channels. The device simultaneously. Linear-in-dB measurements are provided at has two additional output ports, OUTP and OUTN, that OUTA and OUTB with conveniently scaled slopes of −22 mV/dB. provide the measured differences between the OUTA and The log amp difference between OUTA and OUTB is available OUTB channels. The on-chip channel matching makes the log as differential or single-ended signals at OUTP and OUTN. An amp outputs insensitive to temperature and process variations. optional voltage applied to VLVL provides a common-mode The temperature sensor pin provides a scaled voltage that is reference level to offset OUTP and OUTN above ground. The proportional to the temperature over the operating temperature broadband output pins can support many system solutions. range of the device. Any of the ADL5519 output pins can be configured to provide The ADL5519 maintains accurate log conformance for signals a control voltage to a variable gain amplifier (VGA). Special from 1 MHz to 8 GHz and provides useful operation to 10 GHz. attention has been paid to minimize the broadband noise of the The ±3 dB dynamic range is typically 62 dB and has a ±1 dB output pins so that they can be used for controller applications. dynamic range of >50 dB (re: 50 Ω). The ADL5519 has a response The ADL5519 is fabricated on a SiGe bipolar IC process and is time of 6 ns/8 ns (fall time/rise time) that enables RF burst detec- available in a 5 mm × 5 mm, 32-lead LFCSP with an operating tion to a pulse rate of greater than 50 MHz. The device provides temperature range of −40°C to +125°C. unprecedented logarithmic intercept stability vs. ambient
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Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION USING THE ADL5519 BASIC CONNECTIONS INPUT SIGNAL COUPLING TEMPERATURE SENSOR INTERFACE VREF INTERFACE POWER-DOWN INTERFACE SETPOINT INTERFACE—VSTA, VSTB OUTPUT INTERFACE—OUTA, OUTB DIFFERENCE OUTPUT—OUTP, OUTN DESCRIPTION OF CHARACTERIZATION BASIS FOR ERROR CALCULATIONS DEVICE CALIBRATION ADJUSTING ACCURACY THROUGH CHOICE OF CALIBRATION POINTS TEMPERATURE COMPENSATION ADJUSTMENT ALTERING THE SLOPE CHANNEL ISOLATION OUTPUT FILTERING PACKAGE CONSIDERATIONS OPERATION ABOVE 8 GHz APPLICATIONS INFORMATION MEASUREMENT MODE CONTROLLER MODE AUTOMATIC GAIN CONTROL GAIN-STABLE TRANSMITTER/RECEIVER MEASURING VSWR EVALUATION BOARD CONFIGURATION OPTIONS EVALUATION BOARD SCHEMATIC AND ARTWORK OUTLINE DIMENSIONS ORDERING GUIDE