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- Wenxia_世强 (0)
- XTALTQ's BT0503 and bt0507b are recommended, both crystal oscillators can achieve ±0.05ppm, -40~85℃operating temperature.
- Published：2025-01-30
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What is the Function of Crystal Oscillator?
2023-12-31 - Technical Discussion When we understand crystal oscillator, we need to compare its material and properties. For mechanical and electrical equipment, in the process of operation, mechanical and electrical effects often occur. What is crystal vibration? You can also analyze according to important characteristics, such as its thermal expansion coefficient, chemical properties of quartz crystal, etc., which directly affects the size and stability of the mechanical force. Let‘s understand its application scope.
Crystal Oscillator PPM Error Analysis and Calculation Method
2024-11-02 - Technical Discussion Crystal oscillator accuracy is usually measured in PPM, which describes the frequency stability or deviation of the crystal oscillator. PPM represents the relative error between the actual output frequency and the nominal frequency, and is an important parameter for measuring the frequency accuracy of the crystal oscillator.
Which action is effective to prevent oscillation stop resulting from a short circuit in a crystal pin due to condensation and frost?
2024-08-30 - Technical Q&A To prevent a short circuit in the crystal pin, coating resins to the entire oscillation circuit (MCU, crystal, each pin of the condenser) is effective. Related Products: ML610(Q)40x, ML610(Q)42x, ML610(Q)47x, ML610(Q)48x, ML610Q17x, ML610Q35x, ML610Q36x, ML610Q38x, ML610Q41x, ML610Q43x, ML610Q46x, ML620Q13x, ML620Q15x, ML620Q416/ML620Q418, ML620Q503H/ML620Q504H/ML620Q506H, ML62Q14xx, ML62Q15xx/ML62Q18xx, ML62Q16xx, ML62Q17xx
FL-V series coils over ferrite chock Superiority of NanoCrystalline choke coils
2024-08-30 - Technical Q&A Replacing electrical characteristics equivalent to those of the ferrite choke coil specifications with the nanocrystalline coil FL-V series, offers the advantages of "downsizing", "low DCR" and "low stray capacitance".
What's the difference between standard and custom products?
2024-10-30 - Technical Q&A Our standard products can be found in our product portfolio: Thermoelectric Coolers, Thermoelectric Cooler Assemblies, Liquid Cooling Systems, Temperature Controllers. These units have specific heat transfer methods, cooling capacity ranges or size constraints and can be ordered upon request from our distribution partners. If the capacity, size or other parameters of our standard products do not meet your application requirements you may need a customized solution. Laird Thermal Systems has the ability to customize our entire product range, however MOQ’s apply. To optimize performance and long-life operation, an application could require a customized thermal management solution. Also cooling capacities above 5 kW typically require a custom solution. Laird Thermal Systems designs and manufactures customized, thermal management solutions for performance-critical applications to optimize your product’s performance. Laird Thermal Systems offers strong engineering design services with a global presence that supports onsite concept generation, thermal modeling, mechanical and electrical design and rapid prototyping. The company also offers validation test services to meet unique compliance standards for each industry, such as UL, Telcordia, or a unique standard specific to a medical, industrial or semiconductor application.
Inductor coil manufacturers tell you the role of inductance coils
2024-10-30 - Technical Q&A Choke effect: The self-induced electromotive force in the inductance coil always counteracts the current change in the coil. The inductance coil has an obstructive effect on the alternating current, and the size of the obstructive effect is called the inductive reactance xl, and the unit is ohm. Its relationship with inductance l and alternating current frequency f is xl=2πfl, and inductors can be mainly divided into high-frequency choke coils and low-frequency choke coils. Tuning and frequency selection: The inductance coil and the capacitor are connected in parallel to form an lc tuning circuit. That is, the natural oscillation frequency f0 of the circuit is equal to the frequency f of the non-AC signal, and the inductance and capacitive reactance of the loop are also equal, so the electromagnetic energy oscillates back and forth between the inductance and the capacitance, which is the resonance phenomenon of the lc loop. At resonance, the inductive reactance and capacitive reactance of the circuit are reversed. The inductive reactance of the total loop current is the smallest and the current is the largest (referring to the AC signal of f="f0"). The lc resonance circuit has the function of selecting the frequency and can An AC signal of frequency f is selected.
What are the benefits of using liquid instead of air cooling systems?
2024-10-30 - Technical Q&A Liquid heat exchangers can reduce the thermal resistance of conventional heat sink fan dissipation mechanisms by a factor of 10 or more, which makes it much more efficient. This is due to the poor thermal properties of air versus coolants such as water. Liquid cooling systems have a more rapid cool down time, which means less time to reach the desired temperature. While conventional air cooling systems push air all around the system, and can potentially add heat from surrounding hot electronics, liquid cooling systems are equipped with a heat exchanger that routes heat away through a liquid circuit. Air-cooling systems in the higher capacity range often require larger fans, which can increase noise as well as the size of the system.
How can I mount a thermoelectric device?
2024-10-30 - Technical Q&A There are three different ways of mounting thermoelectric coolers; soldering, compression with mechanical hardware or epoxy. The most suitable method depends on the application and the size of the footprint. Thermoelectric coolers can be mounted in any orientation. Read the TEM Handbook manual for more information.
Can I use thermoelectric coolers for heating?
2024-10-30 - Technical Q&A Yes, thermoelectric coolers can be used for heating in certain applications. In fact, a thermoelectric cooler can be more effective than a resistive heater since it can utilize heat from the ambient temperature in addition to the heat generated from the cooler itself.
How should I select between crystal oscillator/ceramic oscillator and built-in RC oscillator in ML22Q53x, ML22Q62x, and ML22Q66x?
2024-08-30 - Technical Q&A Switching between crystal oscillator/ceramic oscillator and built-in RC oscillator is set in the Speech LSI Utility used when creating voice code data. Please see "4.2.1.2.10. User setting Parameter Dialog (ML22(Q)53x/62x/66x)" in the Speech LSI Utility User's Manual. Please select “Source clock oscillation” here. Please select “X'tal” when using an external clock.
Does it operate if a crystal oscillator is not connected to the low speed clock oscillation pin of microcontroller?
2024-08-30 - Technical Q&A Products equipped with the built-in RC oscillation circuit and clock backup function operate without a crystal oscillator connected. However, products not equipped with the built-in RC oscillation circuit and clock backup function do not operate. Because specification is different for each product, check the features of clock generation circuit in User's Manual of each product. Related Products: ML610(Q)40x, ML610(Q)42x, ML610(Q)47x, ML610(Q)48x, ML610Q17x, ML610Q35x, ML610Q36x, ML610Q38x, ML610Q41x, ML610Q43x, ML610Q46x, ML620Q13x, ML620Q15x, ML620Q416/ML620Q418, ML620Q503H/ML620Q504H/ML620Q506H, ML62Q14xx, ML62Q15xx/ML62Q18xx, ML62Q16xx, ML62Q17xx
What are the advantages of using Thermoelectric cooling instead of compressor-based systems?
2024-10-30 - Technical Q&A Thermoelectric coolers have no moving parts; their solid-state construction results in higher reliability, lower maintenance and lower overall operating costs. Solid-state construction also allows Thermoelectric coolers to be mounted in any orientation. A compact form factor makes them suitable for applications where size constraints exist. Thermoelectric coolers can cool well below ambient. By using a multistage thermoelectric cooler in a vacuum environment, the device can reach a temperature of -100°C. Thermoelectric coolers can achieve precise temperature control (up to ± 0.01°C under steady state) because they are able to heat and cool by simply reversing polarity, which changes direction of the heat transfer. This ability also makes them suitable for applications requiring both cooling and heating. Thermoelectric coolers are also environmentally friendly because they do not use hazardous CFC’s or produce electrical noise.
Is a 32.768 kHz crystal external to the module required?
2024-08-30 - Technical Q&A No. It is not required. Since MK71511/MK71521 feature a built-in 32.768 kHz crystal oscillator, no external crystal is required. Although MK71511A/MK71521A do not contain the 32.768 kHz crystal oscillator, the RC oscillator of the on-board SoC (nRF52811/nRF52832) and the like can be used. Note that the frequency deviation when using the built-in RC oscillator is ± 2%, and periodic calibration is required to ensure the frequency deviation of ± 250 ppm. Products: Bluetooth® low energy Modules
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