850nm
850nm 5mW 2835 VCSEL SMD
850nm 5mW 2835 VCSEL SMD with 6mW typical output, 7mA QCW drive and 20° D86 beam divergence for compact NIR sensing and PCB integration.
Specifications
- Product Type
- VCSEL SMD
- Wavelength
- 850nm typ.; 840–860nm
- Optical Output Power
- 5mW min. / 6mW typ.
- Transverse Mode
- Multi-mode VCSEL
- Operating Mode
- QCW / Pulse
- Beam Divergence
- 20° typ., D86
- SMD Package Options
- 2835
1. 850nm 5mW 2835 VCSEL SMD for Low-Current PCB Integration
The 850nm 5mW 2835 VCSEL SMD is a compact near-infrared surface-mount source designed for low-current sensing, optical detection and PCB-mounted optical-source development.
At a forward current of 7mA and a temperature of 25°C, the device provides 5mW minimum and 6mW typical optical output under a 0.5ms pulse width and 1% duty cycle.
The device uses a compact 2835 SMD package containing a 7mil × 7mil VCSEL chip. Its surface-mount format supports automated PCB placement and reduces the need for customer-side die attachment and wire bonding.
The typical beam divergence is 20° using the D86 measurement definition.
Primary development directions include:
- Low-current near-infrared sensing
- Proximity and presence detection
- Compact optical detection
- PCB-mounted NIR sources
- Sensor and driver evaluation
- Engineering and research prototypes
The product is intended for QCW or pulsed operation. Its optical-output rating should always be interpreted together with the stated current, pulse width and duty cycle.
2. Optical and Electrical Characteristics
The principal optical and electrical characteristics are shown below.
Parameter | Minimum | Typical | Maximum | Test Condition |
|---|---|---|---|---|
Peak Wavelength | 840nm | 850nm | 860nm | — |
Optical Output Power | 5mW | 6mW | — | IF = 7mA |
Threshold Current | 0.7mA | 1.3mA | 2.0mA | — |
Forward Voltage | 1.8V | 2.0V | 2.2V | IF = 7mA |
Beam Divergence, D86 | — | 20° | — | IF = 7mA |
The optical and electrical characteristics are measured at 25°C under QCW operation with a pulse width of 0.5ms and a 1% duty cycle.
The device should not be interpreted as a continuous-wave 5mW source.
Increasing the drive current, pulse width or duty cycle beyond the specified condition can increase junction temperature and may affect optical output, wavelength, electrical characteristics and reliability.
Beam divergence is specified using D86, based on the angular range containing approximately 86% of the measured optical power. The 20° value should not be interpreted as an FWHM value.
3. 2835 Package and SMT Assembly
The device uses a compact surface-mount package suitable for PCB-level optical-source integration.
Package Parameter | Specification |
|---|---|
Package Type | 2835 SMD |
Package Length | 3.5mm |
Package Width | 2.8mm |
Package Height | Approximately 0.68mm |
Internal VCSEL Chip Size | 7mil × 7mil |
Pin 1 | Anode |
Pin 2 | Cathode |
Dimensional Tolerance | ±0.1mm unless otherwise specified |
Standard Reel Quantity | 4,000 pcs / reel |
The 2835 package supports automated pick-and-place assembly and reflow soldering.
PCB integration should consider:
- Correct polarity and package orientation
- Recommended solder-pad dimensions
- Stable 7mA pulse-current delivery
- Current limiting
- Pulse-width and duty-cycle control
- ESD protection
- Optical clearance above the package
- External optical-window or lens position
- PCB thermal structure
The top optical surface should not be pressed, scratched or contaminated during placement and assembly.
The device is ESD-sensitive. Suitable electrostatic protection should be applied during storage, handling, soldering, testing and module integration.
4. Application Development and Product Selection
The 5mW version is positioned as the lowest-current product in the current 850nm 2835 SMD range.
It is suitable when:
- Low drive current is important
- The optical path is relatively short
- The detector provides sufficient sensitivity
- A 1% duty cycle is appropriate
- Compact PCB integration is required
- Initial sensor or optical-source evaluation is being performed
The final system should be evaluated according to working distance, receiver sensitivity, detector response, optical path, pulse synchronization and external optics.
For projects requiring more received optical power in the same package format, compare the 850nm VCSEL SMD Series.
The 850nm 10mW 2835 VCSEL SMD provides an intermediate output level, while the 850nm 20mW 2835 VCSEL SMD provides the highest output in the current series.
5. Evaluation Kit and Documentation Support
The 850nm 5mW 2835 VCSEL SMD can be evaluated for PCB assembly, driver development, pulse-control validation and initial optical testing.
The Evaluation Kit includes:
- 10 pcs / KIT
- One selected 850nm 5mW model per kit
- Corresponding product datasheet
- Corresponding package-dimension file
- International shipping quoted according to destination
The following requirements can be discussed according to the project:
- Optical-output requirement
- Pulse-current control
- Pulse width and duty cycle
- PCB pad integration
- Alternative SMD packaging
- External lens integration
- Diffuser and beam shaping
- Custom optical modules
- Volume-supply requirements
For component-level project evaluation, an Initial Product Report covering the Laser Diode Series and VCSEL Laser Diode Chip Series has been filed with the U.S. FDA CDRH. This filing supports technical documentation and product evaluation.
For applicable products, CE, EMC, EN 60825, LVD, RoHS, REACH and halogen-free certification and compliance documents are available.
Documentation depends on the corresponding product model and does not represent certification of the customer’s finished device.
6. Frequently Asked Questions
FAQ 1. What are the main specifications of the 850nm 5mW 2835 VCSEL SMD?
The device provides 5mW minimum and 6mW typical optical output at 7mA.
It is specified at 25°C under a 0.5ms pulse width and 1% duty cycle.
The typical beam divergence is 20° using the D86 definition, and the device is supplied in a compact 2835 surface-mount package.
FAQ 2. Is the 5mW VCSEL SMD designed for continuous-wave operation?
No.
The optical-output specification is based on QCW operation with a 0.5ms pulse width and 1% duty cycle.
The device should not be treated as a continuous-wave 5mW source without separate electrical, thermal and reliability validation.
FAQ 3. When should I choose the 5mW version instead of the 10mW or 20mW product?
The 5mW version is suitable when low current, short optical paths and compact PCB integration are the primary requirements.
The 10mW and 20mW versions provide higher optical output but require higher pulse current and use a 10% duty-cycle test condition.
The final selection should consider receiver sensitivity, working distance, required optical signal and driver capability.