iC-LQNP

PULSE AND AC LIGHT SENSOR

Rev B1, Page 2/10

DESCRIPTION

iC-LQNP is a sensor for pulse and alternating light

with a monolithically integrated photodiode. The de-

vice supersedes conventional photoreceivers, such

as those in light barriers, for example.

Changes in the photocurrent are amplified whereas

the photocurrents caused by background light

are electronically suppressed with over 60 dB (at

100 Hz).

The integrated amplifier forms a band-pass charac-

teristic without using any external components. The

high pass filter suppresses ambient light and low fre-

quency alternating light and the low pass filter re-

duces high frequency noise.

For visible light or near infrared the highest sensi-

tivity for alternating light signals is reached at ap-

proximately 140 kHz; for pulse light this is reached

at 1.4 µs and upwards.

The transimpedance can be selected within a range

of approximately 1 to 10 MΩ via the external load re-

sistor.

iC-LQNP is available as a 4-lead TO18 metal can

package with a glass lens or flat window. Customised

COB versions are also possible.