Ceramic Resonator For Microcontroller

Microcontrollers apnote ap242401 ceramic resonator oscillators and the.

Ceramic resonator for microcontroller. Can i use ceramic resonator for atmega328p. Microcontroller clock rc oscillator crystal or resonator. Separate gnd plane for microcontroller crystal resonator. The ceramic resonators are also offered with integrated load capacitors.

I believe they re designed to work with whatever value they come with. Choosing a capacitor capacitance for a quartz resonator atmega328p 1. Crystal oscillator or ceramic resonators. Common tolerances are 1000 to 5000 parts per million.

In most cases resonators with internal capacitors are used. It is a parasitical capacitance. They may save you a few cents if you don t need the accuracy of quartz but in my mind the main advantage is that you can get ceramic resonators with integrated load capacitors. Those based on mechanical resonant devices such as crystals and ceramic resonators and those based on electrical phase shift circuits such as rc resistor capacitor oscillators.

This is an automotive grade 16mhz resonator and has 15pf capacitors built in. Stray capacitance is the addition of the mcu pin capacitance osc in and osc out and the pcb capacitance. Crystals ceramic resonators rc oscillators and silicon oscillators are four types of clock source suited for use with microcontrollers. Rext rf q c l1 l2.

Ceramic resonators for the same frequency range are typically used in 3rd overtone mode for a clock frequency higher than 12mhz. Works fine with an atmega328p au. The same resonator can be used with any member of the 8051 family figure 4 7. Microcontroller clock support solutions introduction the majority of clock sources for microcontrollers can be grouped into two types.

Are the two external load capacitors cs. Last and least. My custom board uses a murata cstce16m0v13c99 r0. Crystal quartz or a ceramic resonator rf.

Connecting a ceramic resonator to an 8051 microcontroller many simple consumer applications where accurate timing is not required and cost is an issue make use of ceramic resonators. A ceramic resonator used in 3rd overtone mode needs no tank circuit. The crystal oscillators or ceramic resonators are connected with the pins osci and osc2 in lp xt or hs modes for establishing the oscillating. Endgroup leon heller mar 22 13 at 3 45.

Ceramic resonators are less accurate than crystals. Internal feedback resistor rext. The optimum clock source type for a particular application is dependent on factors including cost accuracy and environmental parameters. External resistor to limit the inverter output current cl1 and cl2.