EVALUATION KIT AVAILABLE MAX3806 Receiver for Optical Distance Measurement General Description Benefits and Features The MAX3806 is a high-gain linear preamplifier for dis- +5V Supply Voltage tance measurement applications using a laser beam. Linearity Range Up to 40A P The device operates from a single +5.0V supply and Overload Current Up to 2mA P converts current from an AC-coupled photodiode into a 50mW Power Dissipation at +5.0V single-ended voltage signal. The input accepts single pulses or bursts of pulses with widths down to 30ns. The 1.5pA/Hz Noise Density at 60k Gain amplifier remains linear with input amplitudes from 42nA P 14nA Input-Referred Noise at 60k Gain RMS (SNR = 3) to 40A . It can also withstand overload sig- P Selectable Gains (60k, 30k) nals as large as 2mA . The output stage is designed to P Selectable 14dB Attenuation 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 Ordering Information be 60k or 30k. There is also an internal 14dB attenu- ator that is selected using the ATT pin. The output stage PIN- TOP PART TEMP RANGE can be disabled (high impedance). PACKAGE MARK The device is available in a 3mm x 3mm, 12-pin TQFN MAX3806GTC+ -40C to +105C 12 TQFN-EP* ABN package and operates over the -40C to +105C tem- +Denotes a lead(Pb)-free/RoHS-compliant package. perature range. *EP = Exposed pad. Applications Laser Sensors for Portable Distance Measurement Pin Configuration appears at end of data sheet. Laser Sensors for Industrial Applications Typical Application Circuits +5V +5V TO +12V SUPPLY FILTER SINGLE-CHANNEL RECEIVER SUPPLY FILTER V CC 0.01F PIN 0.01F MAX3806 MAX1446 IN OUT BUFF LINEAR LIDAR Rx ADC C* 0.01F L* GAIN DIS ATT GND +5V * L AND C SET THE LOW-FREQUENCY CUTOFF REQUIRED FOR THE APPLICATION. Typical Application Circuits continued at end of data sheet. 19-4700 Rev 1 6/14MAX3806 Receiver for Optical Distance Measurement Absolute Maximum Ratings Supply Voltage Range, V ...................................-0.5V to +6.0V Continuous Power Dissipation (T = +70C) CC A Voltage Range at ATT, DIS, GAIN...............-0.5V to (V + 0.5V) 12-Pin TQFN-EP (derate 16.7mW/C above +70C)...1333mW CC Current Range at IN, OUT.......................................-4mA to +4mA Storage Temperature Range .............................-55C to +150C Lead Temperature (soldering, 10s) .................................+300C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (V = +4.5V to +5.5V, AC-coupled (C = 0.01F) output load 2k, T = -40C to +105C. Typical values are at V = +5V, CC A CC T = +25C, unless otherwise noted.) (Note 1) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Power-Supply Current I (Note 2) 10 15 mA CC INPUT SPECIFICATIONS C = 5pF, GAIN = 1 14 20 Output noise up to IN Input-Referred Noise nA RMS 100MHz/(gain at 5MHz) C = 5pF, GAIN = 0 21 27 IN Output noise centered C = 5pF, GAIN = 1 1.5 1.8 IN Input-Referred Noise at 5MHz over 100Hz pA/Hz Density C = 5pF, GAIN = 0 1.7 2.3 band/(gain at 5MHz) IN At 1MHz, GAIN = 1 800 Input Impedance At 1MHz, GAIN = 0 300 CMOS/TTL INPUT SPECIFICATIONS Input High Voltage V 2 V V IH CC Input Low Voltage V 0 0.8 V IL I , I DIS input 150 IH IL Input Current A I GAIN and ATT inputs -180 IH R DIS input 60 PULLUP Input Impedance k R GAIN and ATT inputs 40 PULLDOWN GENERAL SPECIFICATIONS I 15AP, GAIN = 1 44 60 77 Small-Signal IN k Transimpedance IIN 50AP, GAIN = 0 23 30 37 GAIN = 1, ATT = 0 25 49 Small-Signal Bandwidth f C = 5pF MHz 3dB IN GAIN = 0, ATT = 0 55 98 Gain Peaking 5pF C 15pF 1 dB IN Attenuation Stability ATT = 1 20log(V /V ) -13 -14 -15 dB OUT ATT ON OUT ATT OFF OUTPUT SPECIFICATIONS GAIN = 1 -54 Frequency = 1MHz, V = 0.5V OUT P GAIN = 0 -53 Total Harmonic Distortion THD dB GAIN = 1 -38 Frequency = 10MHz, V = 0.5V OUT P GAIN = 0 -47 Power-Supply Noise GAIN = 1 -16 Rejection GAIN = 1 -16 PSNR Noise frequency < 1MHz dB GAIN = 0 -23 (Note 3) Maxim Integrated 2 www.maximintegrated.com