ISL29501

Time of Flight (ToF) Signal Processing IC

OVERVIEW

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 I2 C 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.

KEY 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

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL29501
Production Status
Mass Production
VS (min)
2.7 V
VS (max)
3.3 V
ICC
1 µA (Shutdown), 55mA (Measuring)
Gain Selection?
Yes
Qualification Level
Standard
Bus/Output Interface
I2C
Address Selection Pins?
Yes
Package Dimensions (mm)
4.0x5.0x0.9
Features
Enables proximity detection and distance measurement
Enable Pin?
Yes
Can Sample
YES
Temperature Range
-40 to +85

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