The ISL29501 is a Time of Flight (ToF) based signal processing
integrated circuit. The sensor enables low cost, low power and
long range optical distance sensing when combined with an
external emitter and detector.
The ISL29501 has a built-in current DAC circuit that drives an
external LED or laser. The modulated light from the emitter is
reflected off the target and is received by the photodiode. The
photodiode then converts the returned signal into current,
which is used by the ISL29501 for signal processing.
An on-chip Digital Signal Processor (DSP) calculates the time
of flight, which is proportional to the target distance. The
ISL29501 is equipped with an I2C interface for configuration
and control.
Use of an external photodiode and emitter allows the user to
optimize the system design for performance, power
consumption and distance measurement range that suit their
industrial design.
The ISL29501 is wavelength agnostic and permits the use of
other optical wavelengths if better suited for applications.

Features
• Enables proximity detection and distance measurement
• Modulation frequency of 4.5MHz
• Emitter DAC with programmable current up to 255mA
• Operates in continuous and single shot mode
• On-chip active ambient light rejection
• Auto gain control mechanism
• Interrupt controller
• Supply voltage range of 2.7V to 3.3V
• I2C interface supporting 1.8V and 3.3V bus
• Low profile 24 Ld 4x5 TQFN package

Applications
• Mobile consumer applications
• Industrial proximity sensing
• Power management
• Home automation