Video Output Driver,High-Frequency Amplifier Applications# Technical Documentation: CPH6071 Infrared Receiver Module
*Manufacturer: SANYO*
## 1. Application Scenarios
### Typical Use Cases
The CPH6071 is a miniaturized infrared receiver module designed for remote control systems operating at 38kHz carrier frequency. Its primary applications include:
Consumer Electronics
- Television and home theater remote control systems
- Set-top boxes and streaming devices
- Audio equipment and sound systems
- Air conditioning and climate control units
- Smart home automation controllers
Industrial Applications
- Industrial equipment remote operation
- Building automation systems
- Security system controls
- Medical equipment remote interfaces
- Test and measurement instrument control
Automotive Systems
- Infotainment system controls
- Climate control interfaces
- Aftermarket accessory integration
### Practical Advantages
- High Sensitivity : Excellent reception distance up to 15 meters in typical conditions
- Low Power Consumption : Ideal for battery-operated devices
- EMI Resistance : Built-in shielding provides excellent noise immunity
- Compact Size : Small form factor (typical 7.0×6.0×5.0mm) enables space-constrained designs
- Integrated Design : Contains photodiode, preamplifier, and demodulator in single package
### Limitations
- Limited Range : Performance degrades significantly beyond 15 meters
- Line-of-Sight Requirement : Requires direct or reflected path to transmitter
- Ambient Light Sensitivity : Strong sunlight or fluorescent lighting may cause interference
- Temperature Constraints : Operating temperature range of -25°C to +85°C
- Carrier Frequency : Fixed at 38kHz, not suitable for other carrier frequencies
## 2. Design Considerations
### Common Design Pitfalls and Solutions
Power Supply Issues
- Pitfall : Noise from power supply affecting receiver sensitivity
- Solution : Implement proper decoupling with 10μF electrolytic and 100nF ceramic capacitors close to power pins
- Pitfall : Voltage spikes during system startup
- Solution : Use series resistor (10-100Ω) in power line with additional bypass capacitor
Signal Integrity Problems
- Pitfall : False triggering from environmental noise
- Solution : Implement software debouncing and validation protocols
- Pitfall : Signal reflection and standing waves
- Solution : Proper termination and impedance matching in signal lines
### Compatibility Issues
Microcontroller Interface
- Voltage Level Matching : Ensure compatibility between CPH6071 output (typically 3.3V/5V) and microcontroller input levels
- Signal Polarity : Verify output signal polarity matches microcontroller expectations
- Timing Constraints : Account for propagation delays in system timing calculations
Transmitter Compatibility
- Carrier Frequency : Must match 38kHz ±1kHz for reliable operation
- Duty Cycle : Optimal performance with 1/3 duty cycle modulation
- Protocol Support : Compatible with RC-5, NEC, Sony SIRC, and other common IR protocols
### PCB Layout Recommendations
Component Placement
- Position CPH6071 at edge of PCB facing expected transmitter direction
- Maintain minimum 5mm clearance from other components
- Avoid placement near heat-generating components or switching regulators
Routing Guidelines
- Keep output signal trace as short as possible
- Use ground plane beneath the module for shielding
- Route power traces with adequate width (minimum 0.5mm)
- Separate digital and analog ground domains with single-point connection
Shielding Considerations
- Ensure metal casing (if used) doesn't obstruct IR window
- Provide adequate ventilation to prevent heat buildup
- Consider EMI shielding cans in high-noise environments
## 3. Technical Specifications
### Key Parameter Explanations
Electrical Characteristics
- Supply Voltage (Vcc) : 2.7V to 5.
