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 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
Law conformance 0.3 dB from 3 nA to 3 mA
Optional adjustment of slope and intercept
LFCSP 4 mm × 4 mm