January 16, 2017

Vishay TSOP4838 - IR receiver module : weekend die-shot

Vishay TSOP4838 - decodes IR commands sent with 38kHz modulation. This modulation (and narrow-band filter on receiver module) is required to eliminate ambient light sources which could flicker somewhere at 50-100Hz or 20-30kHz (bad CFL/LEDs). Black (IR transparent) plastic also helps with background noise.

Die size 590x594 µm.

Photodiode is on a separate die:

Die size 1471x1471 µm