Quartz Crystals for Robotics
Product Overview
Quartz crystals are passive frequency-control componentsthat provide precise and stable timing references for robotic processors,communication interfaces, sensors and real-time control systems.
A quartz crystal uses the piezoelectric properties ofquartz to resonate at a specific frequency. When connected to an oscillatorcircuit inside an MCU, processor or communication IC, it generates the accurateclock required for digital processing and synchronized communication.
Key Functions
Provides a stable reference frequency
Controls MCU and processor operating clocks
Maintains communication timing accuracy
Supports precise sensor sampling
Synchronizes distributed control systems
Provides timing for motor-control algorithms
Supports real-time clocks and timekeeping
Reduces clock drift compared with basic RC oscillators
Improves communication and control reliability
Typical Applications
Robot main-control boards
Motor-driver and joint-control PCBs
CAN and CAN FD interfaces
Ethernet communication systems
Wireless modules
Sensor and IMU boards
Camera and vision systems
AI-computing modules
Battery-management systems
AGVs, AMRs and humanoid robots
Main Crystal Types
Crystal type | Typical use |
MHz Quartz Crystal | MCU, processor and communication clocks |
32.768 kHz Crystal | Real-time clock and low-power timekeeping |
High-Stability Crystal | Precision communication and measurement |
Automotive-Grade Crystal | High-reliability control and communication systems |
Temperature-Stable Crystal | Applications with wide temperature variation |
Miniature SMD Crystal | Compact sensor and communication PCBs |
Crystal Construction
Quartz Blank
A precisely cut quartz plate vibrates mechanically at itsspecified resonant frequency.
Metal Electrodes
Thin electrodes applied to the quartz convert electricalenergy into mechanical vibration and back into an electrical signal.
Support Structure
Small metal supports suspend the quartz blank inside thepackage while providing electrical connections.
Ceramic Base
Provides mechanical support, electrical insulation andsurface-mount terminals.
Hermetic Metal Lid
The sealed metal cover protects the quartz element frommoisture, contamination and mechanical damage.
Package Terminations
The package may have two active crystal connections plusadditional case-ground pads, depending on its design.
Main Components Around the Crystal
MCU or Processor
Contains an internal oscillator amplifier that works withthe external crystal to generate the system clock.
Load Capacitors
Two matched capacitors provide the load capacitancerequired for the crystal to operate close to its specified frequency.
Bias or Feedback Resistor
Some oscillator designs use an internal or externalhigh-value resistor to establish the oscillator’s operating point.
Ethernet PHY
Uses a crystal or oscillator reference to maintain accurateEthernet communication timing.
RTC IC
Uses a 32.768 kHz crystal for calendar, timestamp andlow-power timekeeping functions.
Decoupling Capacitors
Stabilize the power supply around the processor andoscillator circuit.
Ground Guard Area
A controlled ground region helps shield sensitiveoscillator traces from switching noise and external interference.