EmbeddedRelated.com
    Parts    SFH 320-Z
SFH 320-Z

SFH 320-Z

ams-OSRAM USA INC.
Phototransistors 980nm Top View 2-LCC (J-Lead)
Active18,835 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The SFH 320-Z is a silicon NPN phototransistor housed in a compact SMT P-LCC-2 package, designed for high-linearity detection of infrared radiation. It features a peak sensitivity at 980 nm and a wide spectral range from 450 nm to 1150 nm, making it suitable for both visible and near-infrared applications. With a 120-degree viewing angle and high ESD stability of 2 kV, it is an ideal choice for surface-mount optical sensing designs.

Why Choose This Part

The component offers excellent linearity of photocurrent versus irradiance, which simplifies analog conditioning circuitry. Its P-LCC-2 package is compatible with all standard reflow soldering processes and provides a small footprint for high-density PCB layouts. Additionally, the low dark current of 50 nA ensures high sensitivity and a large signal-to-noise ratio in low-light conditions.

Applications

Industrial Optocouplers
Used in signal isolation and feedback loops where high linearity and reliable switching are required.
Position Sensing
Ideal for edge detection, end-of-travel switches, and optical encoders in automation hardware.
Light Barriers
Functions as the receiver in IR beam-break systems for presence detection and counting.
Infrared Remote Controls
Serves as a reliable receiver component for 940nm-980nm IR communication links.

Key Specifications

Wavelength 980nm
Orientation Top View
Power - Max 165 mW
Mounting Type Surface Mount
Viewing Angle 120deg
Package / Case 2-LCC (J-Lead)
Operating Temperature -40degC ~ 100degC
Current - Dark (Id) (Max) 50 nA
Current - Collector (Ic) (Max) 15 mA
Voltage - Collector Emitter Breakdown (Max) 35 V

Getting Started

To integrate this part, design a simple common-emitter amplifier circuit with a load resistor selected based on the desired response time and photocurrent range (typically 18 uA to 71 uA). Ensure the PCB layout includes a solder pad for the J-lead package and keep the optical path clear of obstructions to utilize the full 120-degree viewing angle. For prototyping, this component can be hand-soldered to a 1210 or PLCC-2 breakout board for use with a standard microcontroller ADC or comparator input.

Also Consider

TEMT6000 Vishay Semiconductor - Offers a spectral sensitivity that closely matches the human eye for ambient light sensing instead of IR focus.
SFH 320 (Binned) ams OSRAM - A specific photocurrent grouping of the same series for applications requiring tighter sensitivity tolerances.
TEPT5700 Vishay Semiconductor - A through-hole alternative in a T-1 3/4 package for designs that do not utilize surface-mount technology.