ADL5310

PRODUCTION

120 dB RANGE (3 nA TO 3 mA) Dual Logarithmic Converter

Data Sheet (Rev. B) Product Selection Table

Part Models: 1
1ku List Price: Starting From $15.52

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Overview

Optimized for fiber optic photodiode interfacing
Measures current over 6 decades
Law conformance 0.3 dB from 3 nA to 3 mA
Single- or dual-supply operation (3 V to ±5.5 V total)
Nominal slope of 10 mV/dB (200 mV/decade)
Nominal intercept of 300 pA (set by external resistor)
Optional adjustment of slope and intercept
Full log-ratio capabilities
Temperature stable
Rapid response time for a given current level
Miniature 24-lead chip scale package
(LFCSP 4 mm × 4 mm)
Low power: <10 mA quiescent current

The ADL5310 is a low-cost dual logarithmic amplifier that converts input current over a wide dynamic range to a linear-in-dB output voltage. It is optimized for the determination of optical power in wide-ranging optical communication system applications including control circuitry for lasers, optical switches, attenuators, and amplifiers, as well as general system monitoring. The device is equivalent to a dual AD8305 with enhanced dynamic range (120 dB). While the ADL5310 contains two independent signal channels with individually-configurable transfer function constants (slope and intercept), internal bias circuitry is shared between channels for improved power consumption and channel matching. Dual converters in a single compact LFCSP package yield space-efficient solutions for measuring gain or attenuation across optical elements. Only a single supply is required, while optional dual supply operation offers added flexibility.

The ADL5310 employs an optimized translinear structure, which utilizes the accurate logarithmic relationship between a bipolar transistor's base-emitter voltage and collector current, with appropriate scaling by precision currents to compensate the inherent temperature dependence. Input and reference current pins sink current ranging from 3 nA to 3 mA (limited to ±60 dB between input and reference) into a fixed voltage defined by the VSUM potential, which is internally set to 500 mV but may be externally-grounded for dual-supply operation and additional applications requiring voltage inputs.

Part Models: 1
1ku List Price: Starting From $15.52

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADL5310ACPZ-REEL7	24-Lead LFCSP (4mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

May 5, 2014 - 14_0020 Conversion of 4x4mm body Size LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to Amkor Philippines.
		PCN14_0020_Form Material_Report Detailed Change Description Package Outline Drawing Qualification Report Summary
ADL5310ACPZ-REEL7	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Evaluation Kits

ADL5310 Evaluation Board

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Product Details

This page contains ordering information for evaluating the ADL5310.

Evaluating the ADL5309 Dual, 188 dB Range, 10 pA to 25 mA, Logarithmic Converter

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Features and Benefits

Full featured evaluation board for the ADL5309
Supports external electrical input or on-board photodiode for optical input
On-chip or external photodiode bias
ADC control for V_OUT1, V_OUT2, and digital thermometer

Product Details

The ADL5309-EVALZ evaluation board allows for the evaluation of the ADL5309 logarithmic converter IC.

The ADL5309 is comprised of dual monolithic logarithmic transimpedance amplifiers that are optimized for the measurement of low frequency and wide dynamic range signal power in fiber optic systems. The device produces a highly accurate, temperature compensated output voltage proportional to the logarithm of the ratio between the input current at Pin INP and an internally generated reference current.

The logarithmic slope and intercept are both factory-trimmed to a nominal value of 200 mV/decade and 10 pA, respectively. Both can be adjusted through the I²C interface.

A digital representation of the OUT1 and OUT2 outputs, along with a digital thermometer, is available through the I²C interface. A 14-bit successive approximation register (SAR) analog-to-digital (ADC), controlled through the I²C interface, samples the OUT1 channel output, OUT2 channel output, and the digital thermometer output.

Full specifications on the ADL5309 are available in the ADL5309 data sheet available from Analog Devices, Inc., and must be consulted with this user guide and the ADL5309-EVALZ evaluation board.