特性
- 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
ISL29501 Functional Diagram
描述
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.
应用
- Precise long-range distance measurement
- Drone / robot collision avoidance and soft landings
- Industrial automation
- Car parking sensors
- Gate and door sensors
- Silo level monitoring
- Intermodal and ocean container cargo loading sensors
- Human presence detection and obstacle avoidance
- Smart homes and offices
- Smart appliances, toilets and fixtures
- Smart kiosks
- People counting
| Part Number | Status | Samples | Stock | RoHS | Package | Lead Count (#) | Carrier Type | Moisture Sensitivity Level (MSL) | Pb (Lead) Free | Pb Free Category | Temp. Range (°C) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ISL29501IRZ-T7 | Obsolete | N/A | In Stock | RoHS:EN | QFN | 24# | Reel | 1 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
| ISL29501IRZ-T7A | Obsolete | N/A | In Stock | RoHS:EN | QFN | 24# | Reel | 1 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
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- 应用说明英语PDF 442 KB AN1984 2022年4月11日AI 生成的摘要: Temperature and ambient light error correction requires independent data sweeps, changing only one variable at a time. Standard calibration must be loaded before data collection. Temperature data is collected by placing the device in an oven and ramping temperature in 5°C steps, recording phase shifts. Ambient light correction involves varying light intensity using an 850nm LED while keeping temperature constant. Data is used to generate error coefficients programmed into the chip to improve measurement accuracy under varying conditions.
- 应用说明英语PDF 164 KB AN1967 2022年4月11日AI 生成的摘要: Renesas provides technical specifications, design resources, and safety information "as is" without warranties, placing responsibility on developers to select, design, validate, and test applications using Renesas products. Usage is limited to development with Renesas products, prohibiting reproduction or other uses. Renesas disclaims liability and requires indemnification for claims arising from use. All trademarks belong to their respective owners.
- 应用说明英语PDF 331 KB an1983 2022年4月06日AI 生成的摘要: The document explains best practices for Time-of-Flight (TOF) crosstalk calibration, emphasizing the importance of covering only the photodiode (PD) with an 850nm light blocker to prevent erroneous calibration caused by reflections. It details how reflections inside the glass and setup can cause optical crosstalk, affecting distance measurements. Proper blocker placement, material choice, and calibration procedures ensure accurate crosstalk measurement and compensation during normal operation. Calibration must be done at normal emitter current levels, and the blocker must fully cover the PD's field of view without interfering with the emitter.
- 应用说明英语PDF 205 KB AN1724 2022年4月06日AI 生成的摘要: Calibration procedures include three routines: magnitude, crosstalk, and distance calibration. Magnitude calibration is an internal process that compensates for chip changes without emitting light and takes less than one second. Crosstalk calibration cancels unwanted electrical signals by averaging 100 measurements with the emitter blocked, taking up to 15 seconds. Distance calibration averages 100 measurements at a known reference distance to compensate for phase delays, also taking up to 15 seconds. Each calibration requires preset emitter current, sample period, and integration time.
- 应用说明英语PDF 1007 KB AN1966 2022年4月06日AI 生成的摘要: The system field of view (FOV) results from the overlap of the emitter radiation and detector FOV distributions, with the emitter’s narrower distribution defining the system FOV for Sand Tiger at ±2.75°. FOV is simplified as a cone with a Full Width Half Maximum (FWHM) angular width. Signal photocurrent depends on emitter power, detector area, responsivity, target distance, and target properties. Measurements use a Lambertian target, showing signal strength decreases with the square of distance. The detector lens enhances signal collection by focusing light onto the photodiode. Signal current values for various distances are provided for a 100mA emitter drive.
- 应用说明英语PDF 280 KB AN1917 2022年4月06日AI 生成的摘要: The document details the layout design for ISL29501 focusing on analog and digital power management, emphasizing isolation and grounding strategies to minimize noise and interference. It highlights the importance of ferrite beads for power rail isolation and precise decoupling techniques targeting 4.5MHz noise, especially for emitter and power rails. Two emitter decoupling examples illustrate capacitor placement to reduce loop inductance. Ground islands around photodiode pins and careful trace width management optimize signal integrity.
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- 应用说明英语PDF 442 KB AN1984 2022年4月11日AI 生成的摘要: Temperature and ambient light error correction requires independent data sweeps, changing only one variable at a time. Standard calibration must be loaded before data collection. Temperature data is collected by placing the device in an oven and ramping temperature in 5°C steps, recording phase shifts. Ambient light correction involves varying light intensity using an 850nm LED while keeping temperature constant. Data is used to generate error coefficients programmed into the chip to improve measurement accuracy under varying conditions.
- 应用说明英语PDF 164 KB AN1967 2022年4月11日AI 生成的摘要: Renesas provides technical specifications, design resources, and safety information "as is" without warranties, placing responsibility on developers to select, design, validate, and test applications using Renesas products. Usage is limited to development with Renesas products, prohibiting reproduction or other uses. Renesas disclaims liability and requires indemnification for claims arising from use. All trademarks belong to their respective owners.
- 应用说明英语PDF 331 KB an1983 2022年4月06日AI 生成的摘要: The document explains best practices for Time-of-Flight (TOF) crosstalk calibration, emphasizing the importance of covering only the photodiode (PD) with an 850nm light blocker to prevent erroneous calibration caused by reflections. It details how reflections inside the glass and setup can cause optical crosstalk, affecting distance measurements. Proper blocker placement, material choice, and calibration procedures ensure accurate crosstalk measurement and compensation during normal operation. Calibration must be done at normal emitter current levels, and the blocker must fully cover the PD's field of view without interfering with the emitter.
- 应用说明英语PDF 205 KB AN1724 2022年4月06日AI 生成的摘要: Calibration procedures include three routines: magnitude, crosstalk, and distance calibration. Magnitude calibration is an internal process that compensates for chip changes without emitting light and takes less than one second. Crosstalk calibration cancels unwanted electrical signals by averaging 100 measurements with the emitter blocked, taking up to 15 seconds. Distance calibration averages 100 measurements at a known reference distance to compensate for phase delays, also taking up to 15 seconds. Each calibration requires preset emitter current, sample period, and integration time.
- 应用说明英语PDF 1007 KB AN1966 2022年4月06日AI 生成的摘要: The system field of view (FOV) results from the overlap of the emitter radiation and detector FOV distributions, with the emitter’s narrower distribution defining the system FOV for Sand Tiger at ±2.75°. FOV is simplified as a cone with a Full Width Half Maximum (FWHM) angular width. Signal photocurrent depends on emitter power, detector area, responsivity, target distance, and target properties. Measurements use a Lambertian target, showing signal strength decreases with the square of distance. The detector lens enhances signal collection by focusing light onto the photodiode. Signal current values for various distances are provided for a 100mA emitter drive.查看更多 (6)
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