Unmanned Aerial Vehicles
UAVs are exposed to harsh conditions such as shock, vibration, and extreme weather. They need a ruggedized timing solution that is as tough as the environment in which they operate. MEMS timing provides robust performance with the best acceleration sensitivity, better phase noise under vibration, and excellent stability over wide temp ranges.
SiTime Endura timing products begin with hermetically sealed MEMS resonators coupled with advanced mixed-signal ICs to provide a system solution that yields higher reliability and robust performance under dynamic conditions.
SiTime MEMS Timing Benefits
Precision TimingBetter phase noise under vibration 3.5 ppb/°C dF/dT, no lock loss under dynamic conditions ±100 ppb from -55°C to 105°C No Activity dips or micro jumps |
Most Robust in Harsh ConditionsBest acceleration sensitivity, 0.004 ppb/g 30,000g mechanical shock survivability Exceeds MIL-STD-883F, Method 2002 standard Extended operating temp range |
Higher ReliabilityConforms to MIL-PRF-55310 1,900M hours MTBF Hermetically sealed No cover or shielding needed |
MEMS Timing Solutions for UAV
| Devices | Frequency | Frequency Stability | Function | Key Features |
|---|---|---|---|---|
|
SiT5346 Super-TCXO SiT5347 Super-TCXO SiT5348 Super-TCXO SiT5349 Super-TCXO |
1 to 60 MHz 60 to 220 MHz 1 to 60 MHz 60 to 220 MHz |
±0.1 to ±0.25 ±0.1 to ±0.25 ±0.05 ±0.05 |
Reference clock for baseband | 0.004 ppb/g, ±100 ppb, ±1 ppb/°C |
|
SiT9346 Differential XO SiT9347 Differential XO |
1 to 220 MHz 220 to 725 MHz |
±10 to ±50 | FPGA & processor clocking | 0.23 ps RMS phase jitter |
|
SiT8944 Single-ended XO SiT8945 Single-ended XO |
1 to 110 MHz 115 to 137 MHz |
±20 to ±50 | Processor clocking | AEC-Q100, 2.0x1.6 mm |
| SiT1580 32 kHz TCXO | 32.768 kHz | ±5 | Time-keeping | 2.5 ns RMS IPJ, 1.2 mm2 CSP |
MEMS Timing Outperforms Quartz
Best-in-Class-Aging |
Lower Acceleration (g) Sensitivity |
|---|---|
 |
 |
MEMS Timing Outperforms Quartz
|
▀ SiTime ▀ Quartz |
|
|---|---|
Acceleration Sensitivity
|
Mechanical Shock
|
Quality
|
Reliability MTBF (Million Hours)
|
Conforms to MIL Specifications
| MIL-PRF-55310 | Test | Single-ended XO | Differential XO/VCXO/DCXO | TCXO |
|---|---|---|---|---|
| 3.6.40.1 | Shock | ● | ● | ● |
| 4.8.18.3.1 | g-Sensitivity | ● | ● | ● |
| 3.6.34.1 | Frequency aging | ● | ● | ● |
| 3.6.17.1 | g-Sensitivity, constant acceleration | ● | ● | ● |
| 3.6.38.3 | Phase noise under vibration | ● | ● | ● |
| 3.6.10.2 | Frequency-temperature stability with hysteresis | ● | ● | ● |
| 3.6.45.2 | Ambient pressure | ● | ● | ● |
| 3.6.16.5 | Allan deviation | n/a | n/a | ● |
| 3.6.10.4 | Frequency-temperature stability with hysteresis and trim effect | n/a | ● | ● |
| 3.6.15 | Retrace | n/a | n/a | ● |
| 3.6.30.7 | Modulation frequency response | n/a | ● | ● |
| 3.6.41.1 | Acceleration survivability | ● | ● | ● |
| 3.6.7 | Frequency warm up | n/a | n/a | ● |
