The ADL5303 is a monolithic logarithmic detector optimized for the measurement of low frequency signal power in fiberoptic systems and offers a large dynamic range in a versatile andeasily used form. Wide measurement range and accuracy are achieved using proprietary design and precise laser trimming.The ADL5303 requires only a single positive supply, VPS, of 5 V. When using low supply voltages, the log slope can be altered tofit the available span. Low quiescent current and chip disablefacilitate use in battery-operated applications.The input current, IPD, flows in the collector of an optimally scaled NPN transistor, connected in a feedback path around alow offset JFET amplifier. The current summing input nodeoperates at a constant voltage, independent of current, with a default value of 0.5 V; this may be adjusted over a wide range. An adaptive biasing scheme is provided for reducing photo-diode dark current at very low light input levels. The VPDB pin applies approximately 0.1 V reverse bias across the photodiode for IPD = 100 pA, rising linearly to 2.0 V of reverse bias at IPD = 10 mA to improve response time at higher power levels. The input pin INPT is flanked by the VSUM guard pins that track the voltage at the summing node. Connecting the exposed pad of the device to the VSUM pins provides a continuous guard to minimize leakage into the INPT pin.The default value of the logarithmic slope at the VLOG output is set by an internal 5 k? resistor. Logarithmic slope can belowered with an external shunt resistor or increased using the buffer and a pair of external feedback resistors. The addition of a capacitor at the VLOG pin provides a simple low-pass filter.The intermediate voltage, VLOG, is buffered in an output stage that can swing to within about 100 mV of ground and the positive supply, VPS, and provides a peak current drive capacity of ?20 mA. An on-board 2 V reference is provided to facilitate the repositioning of the intercept. The incremental bandwidth of a translinear logarithmic amplifier inherently diminishes for small input currents. At IPD =1 nA, the bandwidth of the ADL5303 is approximately 2 kHz increasing in proportion to IPD up to a maximum value of 10 MHz.APPLICATIONS High accuracy optical power measurement Wide range baseband log compression Versatile detector for APC loops

The ADL5304 is a high speed logarithmic converter with fast response and low noise over a 200 dB (1 pA to 10 mA) measurement range. The ADL5304 provides a nominal logarithmic slope of 10 mV/dB (200 mV/decade); other values are easily configured. Logarithmic intercept can be programmed over a wide range with the internal 100 nA current source or externally for log ratio applications.The default intercept value of 3.162 fA places the midpoint of the measurement range of 100 nA at VLOG = 1.5 V.A single positive supply of 5 V is all that is required for operation over a specified 1 pA to 3 mA input range. Dual-supply operation extends the specified input current range to 10 mA.The ADL5304 accepts two current inputs to the logarithmic argument. The numerator input, INUM, flows in the collector of an NPN transistor, connected in a feedback path around a low offset JFET amplifier. The denominator current, IDEN, is treated in the same way, which allows for log ratio operation. The input summing nodes (INUM and IDEN) operate at a constant default voltage of 1.5 V. The VSM1 to VSM4 pins flank the INUM and IDEN inputs to provide a guard voltage to minimize leakage currents.Adaptive photodiode biasing is provided for optical measurements. A monitor current 1.1 times INUM is output at the IMON pin, and an external resistor, RMNTR, at 10 times the photodiode series resistance (RS) applies a voltage across the photodiode that 1st order keeps the internal PD junction at 0 V to minimize dark current.The VLOG output is buffered and can be rescaled through internal gain setting resistors. The internal ILOG varies from ?400 ?A to +400 ?A as INUM changes over 10 decades from 1 pA to 10 mA. This corresponds to 0.5 V to 2.5 V at the VLOG pin in the default configuration shown in Figure 1.Accurate 1.5 V (Pin 1P5V) and 2.0 V (Pin 2VLT) reference outputs allow precise repositioning of the intercept using external resistors.The ADL5304 is available in a 32-lead, 5 mm ? 5 mm LFCSP and specified for operation from ?40?C to +85?C.Applications High accuracy optical power measurement Wide range baseband log compression Versatile detector for high speed APC loops

The ADL5315 is a wide input current range precision high-side current mirror featuring a stable and user-adjustable input voltage. It is optimized for use with PIN photodiodes, but its flexibility and wide operating range make it suitable for a broad array of additional applications. The part provides a compact solution for the common and often challenging problem of interfacing an optical power monitoring device (such as a log amp) to the cathode-side of a PIN photodiode. The ADL5315 mirrors the current at the cathode at a 1:1 ratio over a six-decade range, producing an output exactly proportional to the reference current monitored. Competing optical current monitors have much higher mirror ratios over narrower dynamic ranges, rendering proportional outputs at very low input currents impossible, while discrete solutions are more tedious to implement and may require significantly more board space.

The ADL5317 is a high-voltage, wide dynamic range biasing and current monitoring device optimized for use with avalanche photodiodes. With the provision of a stable high-voltage supply up to 80 V, the bias voltage at the VAPD pin can be varied from 6 V to 75 V using the 3 V compatible VSET pin. The current sourced from the VAPD pin, over a range of 5 nA to 5 mA, is accurately mirrored with an attenuation of 5 and sourced from the IPDM monitor output. In a typical application, the monitor output drives a current-input logarithmic amplifier to produce an output representing the optical power incident upon the photodiode. The photodiode anode may be connected to a high-speed transimpedance amplifier for the extraction of the data stream.A signal of 0.2 V to 2.5 V with respect to ground applied at the VSET pin is amplified by a fixed gain of 30 to produce the 6 V to 75 V bias at Pin VAPD. The accuracy of the bias control interface of the ADL5317 allows for straightforward calibration, thereby maintaining a constant avalanche multiplication factor of the photodiode over temperature. The current monitor output, IPDM, maintains its high linearity vs. photodiode current over the full?range of APD bias voltage. The current ratio of 5:1 remains constant as VSET and VPHV are varied.The ADL5317 also offers a supply tracking mode compatible with adjustable high voltage supplies. The VAPD pin accurately follows 2.0 V below the VPHV supply pin when VSET is tied to a voltage from 3.0 V to 5.5 V (or higher with a current limiting resistor), and the VCLH pin is open.Protection from excessive input current at VAPD as well as excessive die temperature is provided. The voltage at VAPD falls rapidly from its setpoint when the input current exceeds 18 mA nominally. A die temperature in excess of 140?C will cause the bias controller and monitor to shut down until the temperature falls below 120?C. Either overstress condition will trigger a logic low at the FALT pin, an open collector output loaded by an external pull-up to an appropriate logic supply (1 mA max).The ADL5317 is available in a 16-lead LFCSP package and is specified for operation from ?40?C to +85?C.APPLICATIONS Optical power monitoring and biasing in APD systems Wide dynamic range voltage sourcing and current monitoring in high voltage systems

The ADL5320 incorporates a dynamically adjustable biasing circuit that allows for the customization of OIP3 and P1dB performance from 3.3 V to 5 V without the need for an external bias resistor. This feature gives the designer the ability to tailor driver amplifier performance to the specific needs of the design. This feature also creates the opportunity for dynamic biasing of the driver amplifier, where a variable supply is used to allow for full 5 V biasing under large signal conditions and then can reduce the supply voltage when signal levels are smaller and lower power consumption is desirable. This scalability reduces the need to evaluate and inventory multiple driver amplifiers for different output power requirements from 22 dBm to 26 dBm output power levels.The ADL5320 is also rated to operate across the wide temperature range of ?40?C to +105?C for reliable performance in designs that experience higher temperatures, such as power amplifiers. The 1?4 watt driver amplifier also covers the 400 MHz to 2700 MHz wide frequency range and only requires a few external components to be tuned to a specific band within that wide range. This high performance, broadband RF driver amplifier is well suited for a variety of wired and wireless applications including cellular infrastructure, ISM band power amplifiers, defense equipment, and instrumentation equipment. A fully populated evaluation board is available.The ADL5320 also delivers excellent adjacent channel power ratio (ACPR) vs. output power and bias voltage. The driver can deliver greater than 17 dBm of output power at 2140 MHz while achieving an ACPR of ?55 dBc at 5 V. If the bias is reduced to 3.3 V, the ?55 dBc ACPR output power reduces to 9 dBm.Applications Wireless infrastructure Automated test equipment ISM/AMR applications

The ADL5321 is a broadband, linear driver RF amplifier that operates at frequencies from 2.3 GHz to 4.0 GHz. The device can be used in a wide variety of wired and wireless applications, including ISM, WLL, PCS, GSM, CDMA, and W-CDMA.The ADL5321 operates with a 5 V supply voltage and a supply current of 90 mA.The ADL5321 is fabricated on the GaAs HBT process. The device is packaged in a low cost SOT-89 that uses an exposed paddle for excellent thermal impedance. It operates from ?40?C to +105?C, and a fully populated evaluation board is available.The ADL5320 is a companion part to the ADL5321 that operates at similar performance from 400 MHz to 2700 MHz.

The ADL5372 is a member of the fixed-gain quadrature modulator(F-MOD) family designed for use from 1500 MHz to 2500 MHz.Its excellent phase accuracy and amplitude balance enable highperformance intermediate frequency or direct radio frequencymodulation for communication systems.The ADL5372 provides a >500 MHz, 3 dB baseband bandwidth,making it ideally suited for use in broadband zero IF or lowIF-to-RF applications and in broadband digital predistortiontransmitters. The ADL5372 accepts two differential baseband inputs and asingle-ended, local oscillator (LO) and generates a single-endedoutput.The ADL5372 is fabricated using the Analog Devices, Inc.,advanced silicon-germanium bipolar process. It is available ina 24-lead, exposed-paddle, RoHS compliant, LFCSP. Performanceis specified over a ?40?C to +85?C temperature range. A RoHScompliant evaluation board is available. Applications Cellular communication systems:?CDMA2000/GSM/WCDMA WiMAX/broadband wireless access systems Satellite modems

The ADL5373 supports a frequency of operation from 2300 MHzto 3000 MHz and is a pin-compatible member of the fixed gainquadrature modulator (F-MOD) family designed for use from300 MHz to 4000 MHz. The ADL5373 provides excellent phaseaccuracy and amplitude balance enabling high performanceintermediate frequency or direct radio frequency modulationfor communications systems.The ADL5373 provides a >500 MHz, 3 dB baseband bandwidth,making it ideally suited for use in broadband zero IF or lowIF-to-RF applications and in broadband digital predistortiontransmitters. The ADL5373 accepts two differential baseband inputs that aremixed with a local oscillator (LO) to generate a single-endedoutput.The ADL5373 is fabricated using the Analog Devices, Inc.advanced silicon-germanium bipolar process. It is availablein a 24-lead, exposed paddle, Pb-free LFCSP. Performance isspecified over a ?40?C to +85?C temperature range. A Pb-freeevaluation board is available.Applications WiMAX/broadband wireless access systems Satellite modems

The ADL5385 is a silicon, monolithic, quadrature modulatordesigned for use from 30 MHz to 2200 MHz. Its excellent phaseaccuracy and amplitude balance enable both high performanceintermediate frequency (IF) and direct radio frequency (RF)modulation for communication systems.The ADL5385 takes the signals from two differential basebandinputs and modulates them onto two carriers in quadraturewith each other. The two internal carriers are derived from asingle-ended, external local oscillator input signal at twice thefrequency as the desired carrier output. The two modulatedsignals are summed together in a differential-to-single-endedamplifier designed to drive 50 ? loads.The ADL5385 can be used as either an IF or a direct-to-RFmodulator in digital communication systems. The widebaseband input bandwidth allows for either baseband drive ordrive from a complex IF. Typical applications are in radio-linktransmitters, cable modem termination systems, and broadbandwireless access systems.The ADL5385 is fabricated using the Analog Devices, Inc.,advanced silicon germanium bipolar process and is packaged ina 24-lead, RoHS-compliant LFCSP with exposed pad. Performanceis specified over ?40?C to +85?C. A RoHS-compliant evaluationboard is also available.Applications Radio-link infrastructure Cable modem termination systems UHF/VHF radio Wireless infrastructure systems Wireless local loop WiMAX/broadband wireless access systems

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 ? 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 Vp-p differential signal into 200 ?.The fully balanced design minimizes effects from second-order distortion. The leakage from the LO port to the RF port is 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