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38 kHz IR Detector

Product Code: TSOP4038
Excl. VAT: £0.75 Incl. VAT: £0.90

The TSOP4038 is a drop-in replacement for the venerable, but obsolete, PNA4602!

This unit detects standard 38Khz pulsed signals and the carrier frequency. It makes a cheap analog 38kHz signal strength/data detector for robots, secret triggers, and other electronic projects.

Pin for pin replacement for the PNA4602! Not only is it a drop-in replacement for the PNA4602, it has the added feature of lower voltage operation. It also has a wide supply voltage range and can even be powered by a 3V CR2032 coin-cell battery.

This infrared detector has a 45º detection angle all the way around the dome so it can receive infrared signals from all directions but behind it. It detects 38kHz infrared transmissions regardless if a pulsed signal is received or not, this means it can detect a simple carrier frequency.

The output from this sensor will produce an variable DC voltage compared to the signal strength it sees, starting from the positive supply voltage and going to 0V as the signal grows stronger.

Allow your robot to have simple object detection! As long as the TSOP4038 sees a 38kHz signal, it can be used as a rough analog infrared reflective sensor.


  • Wavelength: 950nM
  • Daylight filtered lens
  • Carrier frequency: 38kHz
  • Transmission range: 30m
  • Directivity: 45°
  • Supply voltage range: 2.7V to 5.5V
  • Supply current: 950µA
  • Operating temperature range: -25°C to +85°C
  • RoHS compliant: Yes

Product Attachments

View FileTSOP4038 Datasheet    Size: (100.06 KB)

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38 kHz IR Detector