This IR demodulator from Vishay is a general-purpose receiver for IR-based remote-control projects. It is intended as detector for data formats that are modulated at 38 kHz and have at least 10 cycles/burst; popular IR-codes that meet these requirements are NEC, Sharp, and r-step (our Mini IR Remote Control uses NEC encoding, so it works well with the TSOP38438). The module?s output signal can be directly connected to a microcontroller; no additional external components are required. See the TSOP38438 datasheet (132k pdf) for more information.
For a similar IR detector that is tuned for a 56 kHz carrier frequency, see the Vishay TSOP34156.
Modulated IR detector comparison
|Intended function||IR remote control||brightness/proximity sensing||predictable modulated IR presence sensing|
|Modulation frequency||56 kHz||38 kHz||38 kHz||38 kHz|
|Gain (sensitivity)||automatic but inaccessible||automatic, predictable||fixed high gain|
|Output||binary (data)||analog (pulse width)||binary (on/off)|
|Update rate||a few kHz||a few Hz||a few kHz|
- Operating Voltage: 2.5 V to 5.5 V
- Carrier Frequency: 38 kHz
- Package: Through-hole with 0.1? lead spacing