Precision Timing for A2L and Next-Generation HVAC
MEMS timing enables compliant A2L leak detection and stable control across the harshest HVAC environments
HVAC systems using A2L refrigerants and hydrogen-ready designs require precise, stable timing for leak detection, sensing, and control. MEMS timing solutions deliver low jitter, high reliability, and stable operation across harsh environmental conditions.
Environmental regulations are accelerating the shift toward low-GWP refrigerants and electrified HVAC architectures. A2L refrigerants such as R-32 and R-454B introduce new safety requirements, particularly for leak detection and system monitoring. Hydrogen-ready heating systems are also emerging within broader decarbonization efforts.
These systems rely on distributed sensing, real-time control, and communication across indoor and outdoor units. Precision timing supports ADC accuracy, sensor synchronization, and stable operation. MEMS timing solutions deliver low-jitter clocking, high temperature stability, and robust performance under vibration, electrical transients, and long service lifetimes.
Features
- Low-jitter clocking for accurate ADC sampling in gas and temperature sensors
- Stable frequency operation from −40°C to +105°C (SiT91211) and up to +125°C (SiT8918, SiT92184) for indoor and outdoor units
- High resilience to vibration, shock, and electrical transients in compressor and fan systems
- EMI-resistant architectures for reliable operation in motor-drive environments
- Clock distribution and buffering for multi-sensor, multi-controller systems, and wireless interfaces
Applications
- Heat pumps, residential and commercial HVAC systems
- A2L refrigerant leak detection, hydrogen-ready heating
- Smart building climate control
Key components
- MEMS clock generators, including SiT91211 Chorus
- MEMS oscillators (XOs), including SiT8918
- MEMS clock buffers, including SiT92184
Benefits
- Supports accurate leak detection through stable, low-jitter sensor timing
- Maintains reliable operation across wide temperature ranges and harsh environments
- Reduces timing errors caused by vibration and EMI
- Extends operational lifetime beyond 15 years with high MTBF
- Simplifies system design by consolidating timing functions and improving signal integrity
- Consolidates multiple timing functions in a single Chorus device to reduce BOM cost and simplify design
