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 QFN package

Applications

• Mobile consumer applications

• Industrial proximity sensing

• Power management

• Home automation