RPR-0730 - 940nm IrVCSEL Analog Photoreflector | ROHM
MPN: RPR-0730 ✓ Hoạt độngRPR-0730 Tóm tắt
What is a photoreflector? A photoreflector (also called a reflective optical sensor or photo interrupter-reflective type) is an optoelectronic device that combines a light emitter (typically an IR LED or VCSEL) and a photodetector (phototransistor, photodiode, or analog front-end IC) in a single package oriented so that the emitter beam reflects off a target surface back into the detector. Photoreflectors belong to the broader category of optical sensors within the sensor hierarchy: photoreflector -> optical proximity sensor -> reflective photosensor -> optoelectronic sensor -> electronic component. They are widely used for non-contact presence, distance, and surface detection where a simple binary or analog reading is sufficient.
Key features of the RPR-0730 include a proprietary 940nm VCSEL emitter (replacing conventional IR LEDs for superior directionality and lower power consumption), a typical sensing distance of 10 mm, an analog output proportional to reflected light intensity, an ultra-compact SMD footprint, and integrated optical filtering tuned to the VCSEL wavelength to reject ambient light. The VCSEL architecture offers narrower spectral bandwidth and a more tightly collimated beam than a typical 940nm LED, improving signal-to-noise ratio in daylight and under fluorescent lamp interference.
Typical applications include human proximity detection in sanitary equipment (faucets, soap dispensers, hand dryers, toilet flush valves), paper/end-of-tape detection in printers and ATMs, object detection on industrial conveyors, and energy-saving wake/sleep control for displays and appliances. The analog output allows threshold-based triggering with a single comparator or, with an ADC, continuous distance estimation within the useful range.
When designing with the RPR-0730, mount the sensor so the optical axis is perpendicular to the target surface and provide a dust/condensation-free optical window, since the analog output is sensitive to both surface reflectance and contamination. Decouple VCC with a 0.1uF ceramic capacitor close to the pins and use the analog output through a transimpedance amplifier or comparator to convert photocurrent into a usable logic level.
This page synthesizes distributor pricing, package details, and practical design guidance for the RPR-0730 beyond the datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho RPR-0730 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
RPR-0521RS
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
RPR-220
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
VCNL36826S
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
APDS-9190
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TMF8801
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
RPR-0730 Tỷ lệ tối đa & tính chất điện
| Kiểu cảm biến | Reflective Optical Sensor (Photoreflector), Analog Output |
| Emitting Wavelength | 940 nm (infrared VCSEL) |
| Emitter Type | IrVCSEL (Vertical-Cavity Surface-Emitting Laser) |
| Detector Type | Phototransistor |
| Sensing Distance | 0.394" (10 mm) typical |
| Kiểu đầu ra | Analog (photocurrent proportional to reflected light) |
| Hộp | 6-SMD, No Lead |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant (per ROHM product page) |
| Lead-Free | Yes (per DigiKey listing) |
Cấu hình chân RPR-0730
| Chân 1 | VCC / VCSEL Anode — Supply voltage / VCSEL anode (per datasheet pinout) |
| Chân 2 | VCSEL Cathode — VCSEL cathode (LED drive return) |
| Chân 3 | GND — Ground |
| Chân 4 | OUT (Collector) — Phototransistor collector / analog output |
| Chân 5 | EMITTER — Phototransistor emitter |
| Chân 6 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
RPR-0730 phù hợp cho 6 Áp dụngs: Sanitary / Bathroom Fixtures, Printer / ATM Paper Detection, Industrial Conveyor / Object Detection, Display Wake-Up / Energy-Saving Control, Vending Machine Product Sensing, Smart Home / IoT Battery Devices.
Sanitary / Bathroom Fixtures
The RPR-0730 detects hand or user approach in touchless faucets, soap dispensers, hand dryers, and automatic toilet flush valves, replacing mechanical push buttons with reliable hygiene-friendly sensing. The 940 nm IrVCSEL provides a tightly collimated beam that minimizes false triggers from stray reflections off stainless steel or porcelain surfaces at 10 mm typical range, while the analog output is read directly by a comparator to switch a solenoid valve at <1 ms response. Low VCSEL drive current extends battery life in solar or battery-powered installations.
Được đề xuất
Printer / ATM Paper Detection
Inside thermal printers, ATMs, and POS terminals the RPR-0730 senses the presence of paper, labels, or card media by detecting reflected IR from the print medium. The 940 nm VCSEL's narrow spectral bandwidth and high-speed phototransistor deliver crisp edges for paper-out and end-of-tape detection even under the paper's own thermal printhead illumination. The 6-SMD footprint fits inside compact paper paths where a 10 mm reflection window is available.
Được đề xuất
Industrial Conveyor / Object Detection
On factory conveyors the RPR-0730 detects the presence of small parts, bottles, or packages moving through a station, replacing mechanical limit switches with a non-contact, wear-free sensor. The IrVCSEL's high ambient-light rejection allows reliable operation under fluorescent factory lighting and near IR-curing lamps, while the analog output is sampled by an ADC to discriminate object size or reflectivity. The 6-SMD, no-lead package withstands vibration and is compatible with conformal coating.
Được đề xuất
Display Wake-Up / Energy-Saving Control
Consumer TVs, monitors, and information kiosks use the RPR-0730 to detect a viewer's presence and wake the display from standby, reducing power consumption when no one is watching. The 10 mm range is sized for the front bezel; the analog output drives a comparator that toggles the panel backlight and main SoC rails via a power management IC. Compared with a PIR motion sensor the photoreflector adds direction-aware (line-of-sight) detection so the display does not wake on hallway traffic.
Được đề xuất
Vending Machine Product Sensing
Vending machines use the RPR-0730 to detect whether a product has been dispensed by sensing reflection from the delivery tray, eliminating false vend signals. The 940 nm VCSEL rejects ambient daylight through the machine's glass front, and the 6-SMD form factor fits beside the tray's actuator coil. Analog output is read by the vending controller's ADC to confirm vend completion before crediting the purchase.
Được đề xuất
Smart Home / IoT Battery Devices
Battery-powered smart-home devices such as night lights, under-cabinet strips, and door sensors use the RPR-0730 to detect motion or door state and wake the radio only when needed, extending coin-cell or Li-ion battery life to multiple years. The IrVCSEL's low drive current (~few mA pulsed) keeps standby power below 10 uA, while the analog output feeds an MCU comparator that wakes the BLE/Zigbee SoC. The 6-SMD package is reflow-compatible with standard lead-free profiles.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho RPR-0730 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | RPR-0521RS | RPR-220 | VCNL36826S | APDS-9190 | TMF8801 |
|---|---|---|---|---|---|---|
| Package | 6-SMD, No Lead | 6-SMD (same family) | 6-SMD (same family) | 6-SMD (different pinout) | 6-SMD (different pinout) | 6-SMD (different pinout) |
| Brand | ROHM Semiconductor | ROHM Semiconductor | ROHM Semiconductor | Vishay Intertechnology | Broadcom | ams OSRAM |
| Emitter Type | 940 nm IrVCSEL | IR LED | IR LED | IR VCSEL | IR LED | VCSEL (ToF) |
| Output Interface | Analog | I2C (digital) | Analog | I2C (digital) | I2C (digital) | I2C (digital) |
| Detector | Phototransistor | Photodiode + IC | Phototransistor | Photodiode + IC | Photodiode + IC | SPAD array |
| Ambient Light Rejection | High (narrow VCSEL beam) | Medium | Medium | High | High | Very high |
Bảo phân biệt quan trọng
- IrVCSEL emitter with superior directionality vs LED (vsRPR-220)
- Simple analog output - no I2C/MCU needed (vsVCNL36826S / APDS-9190)
- Ultra-compact 6-SMD no-lead footprint (vsRPR-0521RS)
Ghi chú thiết kế
Mount the RPR-0730 so its optical axis is perpendicular to the target surface and provide a clear optical window free of dust, condensation, and opaque labels. The 6-SMD no-lead package requires careful PCB land pattern design (see ROHM datasheet recommended footprint) and reflow profile compatible with J-STD-020. Keep the analog output trace short and guarded from VCSEL drive traces to avoid coupling the pulsed emitter current into the phototransistor signal.
Decouple VCC with a 0.1uF ceramic capacitor placed as close as possible to the VCC and GND pins. The IrVCSEL emitter is current-driven; using a constant-current source (or a series resistor chosen for the desired forward current) prevents optical output variation with supply voltage and improves ambient-light rejection. Avoid driving the VCSEL with PWM unless required for very-low-power duty-cycled sensing, since PWM modulation adds complexity to the analog signal conditioning.
The phototransistor collector output is high-impedance and sensitive to leakage; use a transimpedance amplifier or a comparator with low input bias current and place a feedback capacitor to set the bandwidth below the VCSEL drive modulation (if used). Route the analog output away from switching power and digital clock traces. Add a guard ring tied to ground around the phototransistor pin on the PCB to reduce surface leakage in humid environments (e.g. sanitary fixtures).
Thông tin tuân thủ
RoHS and lead-free compliance per ROHM product page and DigiKey listing. AEC-Q100 not applicable (consumer/industrial sensor, not automotive-qualified). Halogen-free status not stated in the verified data.
