MAX3806

NOT RECOMMENDED FOR NEW DESIGNS

Receiver for Optical Distance Measurement

Industry's First 130dB Dynamic Range Transimpedance Amplifier with Switchable Gain and nA Sensitivity

Data Sheet (Rev. 1) Product Selection Table

Part Models: 2
1ku List Price: Starting From $4.72

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Overview

+5V Supply Voltage
Linearity Range Up to 40µA_P
Overload Current Up to 2mA_P
50mW Power Dissipation at +5.0V
1.5pA/ Noise Density at 60kΩ Gain
14nA_RMS Input-Referred Noise at 60kΩ Gain
Selectable Gains (60kΩ, 30kΩ)
Selectable 14dB Attenuation

The MAX3806 is a high-gain linear preamplifier for distance measurement applications using a laser beam.

The device operates from a single +5.0V supply and converts current from an AC-coupled photodiode into a single-ended voltage signal. The input accepts single pulses or bursts of pulses with widths down to 30ns. The amplifier remains linear with input amplitudes from 42nA_P (SNR = 3) to 40µA_P. It can also withstand overload signals as large as 2mA_P. The output stage is designed to drive a high-impedance load to deliver the output-voltage swing at the lowest possible power dissipation. The gain of the preamplifier stage is selected using the GAIN pin to be 60kΩ or 30kΩ. There is also an internal 14dB attenuator that is selected using the ATT pin. The output stage can be disabled (high impedance).

The device is available in a 3mm x 3mm, 12-pin TQFN package and operates over the -40°C to +105°C temperature range.

Applications

Laser Sensors for Industrial Applications
Laser Sensors for Portable Distance Measurement

Part Models: 2
1ku List Price: Starting From $4.72

Documentation

Data Sheet 1

MAX3806: Receiver for Optical Distance Measurement Data Sheet (Rev.1) 06/26/2014

Reliability Data 1

MAX3806 Reliability Data 01/12/2023

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
MAX3806GTC+	LFCSP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX3806GTC+T	LFCSP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Aug 2, 2025 - 2505 PIN/ERRATA
		pcn_2505
MAX3806GTC+		pcn_2505

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

Software Resources

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Evaluation Kits

Evaluation Kit for the MAX3806

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Features and Benefits

Powered by +5V Supply
Input Configurable for Electrical and Optical Evaluation
Selectable +5V or +12V Photodiode Reverse Bias
2-Pin Jumpers Set Operational Modes
SMA Connectors for Input and Output

Product Details

The MAX3806 evaluation kit (EV kit) is an assembled and tested demonstration board that simplifies evaluation of the MAX3806 receiver for optical distance measurement. The input can be configured to evaluate the receiver with and without a photodiode. The board is powered by a +5V supply and an optional +12V supply can be used for photodiode reverse bias. Simple 2-pin jumpers set the operational modes. SMA connectors at the input and output provide an easy interface to test equipment.

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