Rainbow Electronics MAX3806 - Manual

MAX3806
Receiver for Optical Distance Measurement
________________________________________________________________ Maxim Integrated Products 1
19-4700; Rev 0; 7/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE
General Description
The MAX3806 is a high-gain linear preamplifier for dis-
tance 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 over-
load 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 dis-
sipation. The gain of the preamplifier stage is selected
using the GAIN pin to be 60k
Ω 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 tem-
perature range.
Applications
LIDAR Sensors for Automotive Applications
(ACC, Stop&Go)
Laser Sensors for Portable Distance
Measurement
Laser Sensors for Industrial Applications
Features
♦ +5V Supply Voltage
♦ Linearity Range Up to 40µA
P
♦ Overload Current Up to 2mA
P
♦ 50mW Power Dissipation at +5.0V
♦ 1.5pA/√
√ Hz Noise Density at 60kΩ Gain
♦ 14nA
RMS Input-Referred Noise at 60k
Ω Gain
♦ Selectable Gains (60kΩ, 30kΩ)
♦ Selectable 14dB Attenuation
Ordering Information
IN
PIN
+5V
SINGLE-CHANNEL RECEIVER
* L AND C SET THE LOW-FREQUENCY CUTOFF REQUIRED FOR THE APPLICATION.
+5V
OUT BUFF
GAIN
V CC
0.01 μF
C*
L*
0.01 μF
0.01 μF
MAX3806
LINEAR LIDAR Rx
MAX1446
ADC
SUPPLY FILTER
GND ATT DIS
+5V TO +12V
SUPPLY FILTER
Typical Application Circuits
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
PART TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX3806GTC+ -40
°C to +105°C 12
TQFN-EP* ABN
Pin Configuration appears at end of data sheet.
Typical Application Circuits continued at end of data sheet.