ADL5310ACP-REEL7

ADL5310ACP-REEL7概述

120分贝范围( 3 nA的3 mA)的双对数转换器 120 dB Range 3 nA to 3 mA Dual Logarithmic Converter

Product Details

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.

### Features and Benefits

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Optimized for fiber optic photodiode interfacing
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Measures current over 6 decades

Law conformance 0.3 dB from 3 nA to 3 mA

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Single- or dual-supply operation 3 V to ±5.5 V total
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Nominal slope of 10 mV/dB 200 mV/decade
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Nominal intercept of 300 pA set by external resistor

Optional adjustment of slope and intercept

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Full log-ratio capabilities
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Temperature stable
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Rapid response time for a given current level
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Miniature 24-lead chip scale package

LFCSP 4 mm × 4 mm

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Low power: <10 mA quiescent current
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