ADL5308ACCZ

ADL5308ACCZ

Compare
ADL5308ACCZ
FAST RESPONSE LOGARITHMIC CONVER
Compare

$20.45

Price update:a months ago
Available in stock: 565
45
Serves customers in 45 countries
1000+
Worldwide Manufacturers
$140M
$140M Growth in 5 Years
50.0M+
50M Parts Shipped in 5 Years
Analog Devices Inc.

Analog Devices Inc.

Analog Devices (NASDAQ: ADI) leads in crafting high-performance analog, mixed-signal, and digital signal processing integrated circuits. For decades, they've tackled signal processing challenges across global electronics. With over 100,000 clients, their products convert real-world phenomena into electrical signals. Merged with Maxim Integrated, they offer top-tier mixed-signal and power management technologies, solving complex problems from DC to 100 GHz and sensor to cloud.

View All Product from Analog Devices Inc.

The ADL5303ACPZ 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 ADL5303ACPZ 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 kΩ 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 ADL5303ACPZ is approximately 2 kHz increasing in proportion to IPD up to a maximum value of 10 MHz.

Feature

  • Optimized for fiber optic photodiode interfacing
  • 8 full decades of range
  • Law conformance: 0.1 dB from 1 nA to 1 mA
  • Single-supply operation: 3.0 V to 5.5 V
  • Complete and temperature stable
  • Accurate laser trimmed scaling
  • Logarithmic slope of 10 mV/dB (at the VLOG pin)
  • Basic logarithmic intercept at 100 pA
  • Easy adjustment of slope and intercept
  • Output bandwidth of 10 MHz, 15 V/μs slew rate
  • Miniature 16-lead package (LFCSP)
  • Low power: ~4.5 mA quiescent current (enabled)

Applications

  • High accuracy optical power measurement
  • Wide range baseband log compression
  • Versatile detector for APC loops

Product Attributes

TYPE DESCRIPTION Select all
Supplier Device Package 14-LGA (2x3)
Package / Case 14-WFLGA Exposed Pad
Mounting Type Surface Mount
Applications Optical
Type Logarithmic Converter
Product Status Active
Package Strip

Blog

$20.45

Price update:a months ago
Available in stock: 565
Analog Devices Inc.

Analog Devices Inc.

Analog Devices (NASDAQ: ADI) leads in crafting high-performance analog, mixed-signal, and digital signal processing integrated circuits. For decades, they've tackled signal processing challenges across global electronics. With over 100,000 clients, their products convert real-world phenomena into electrical signals. Merged with Maxim Integrated, they offer top-tier mixed-signal and power management technologies, solving complex problems from DC to 100 GHz and sensor to cloud.

View All Product from Analog Devices Inc.

Blog