ADL5310
PRODUCTION120 dB RANGE (3 nA TO 3 mA) Dual Logarithmic Converter
- Part Models
- 1
- 1ku List Price
- Starting From $15.52
Part Details
- 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.
Documentation
Data Sheet 1
Application Note 1
Technical Articles 1
Analog Dialogue 2
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) |
| 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. |
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| ADL5310ACPZ-REEL7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Evaluation Kits
Evaluating the ADL5309 Dual, 188 dB Range, 10 pA to 25 mA, Logarithmic Converter
Resources
ADL5310 Evaluation Board