Special Custom Parameter Crystal Unit #2

This time, we will introduce our crystal resonators that are suitable for Wide Temperature Range and Low Stability.

AATAJAPAN CO., LTD. has released a custom made crystal unit.

Our products are not standard models on the market, but are designed and manufactured to meet the special oscillator parameters required by each customer.

With the advancement to 5G described in the previous post, products with higher frequency and lower noise are being sought, and the Crystal Timing Device used has increased specifications that are not compatible with the current standard model (mass production product). I am. Real applications will need to secure newly designed products.

In addition, there is a growing need for products that minimize the frequency deviation of the oscillator on the high-temperature side.

Our custom-made crystal units are often used mainly for OCXO, TCXO, Discrete Crystal Filter, etc., which break through many barriers in the practical operation of electronic board design in 5G base station standards and require customers. Clearing parameters.

There are various requests from current customers, but they are not always easy to clear.

This is due to the physical limitations of the single crystal, and of course the yield is not very good at the beginning of development.

Even in such situations, we repeatedly try and error and clear(Success)  to change using materials and manufacturing methods that show the best performance each time to clear each parameter that our customers are concerned about.

Naturally, products that exceed the physical properties of a single crystal cannot be made, so there are a few cases where the matter will be closed only by examination, but at the beginning of the inquiry, the customer has judged that it is impossible (it is said that other manufacturers can not respond) Also, specifications can be finally manufactured, delivered to customers, and continuous orders are received.

Quartz crystal units that are considered to be very difficult to realize can be cleared by using our engineers who are familiar with the unique properties of crystal and high quality crystal plates.

For example, in the case of a TCXO element, a crystal that considers high-frequency side frequency fluctuation as the first priority has a large frequency fluctuation in the normal temperature range and cannot be used by customers. For the transducers manufactured and sold by our company, the frequency fluctuations in the normal range are minimized as much as possible, and the frequency fluctuations on the high and low temperatures are suppressed to a certain width. , C1, ESR, Spurious, etc.) and has been highly evaluated by customers.

 

 

Our Products example

Package:   UM-1

Frequency:   67.300MHz

Mode: AT-Cut 3rd overtone

Frequency [email protected]: +/-5ppm

Frequency Stability over -55 to +125: +/-70ppm

Frequency Stability over -40 to +90:  +/-15ppm

Load: SERIES

ESR:  22 Ohms max.

Shunt Capacitance (C0): 4.0pF max.

Motional Capacitance(C1): 1.3fF min.

Q-value: 70K min.

Hysteresis: 0.5ppm max.

Spurious :  3.6 min.

Drive Level: 100uW

Aging: +/-3.0ppm max. / year

Fine Leak Rate: 5*10-9 atm/cc min.

Package:   UM-1

Frequency:   89.000MHz

Mode: AT-Cut 3rd overtone

Frequency [email protected]: +/-5ppm

Frequency Stability over -55 to +125: +/-70ppm

Frequency Stability over -40 to +90:  +/-15ppm

Load: SERIES

ESR:  24 Ohms max.

Shunt Capacitance (C0): 4.0pF max.

Motional Capacitance(C1): 1.3fF min.

Q-value: 65K min.

Hysteresis: 0.5ppm max.

Spurious :  3.5 min.

Drive Level: 100uW

Aging: +/-3.0ppm max. / year

 

Fine Leak Rate: 5*10-9 atm/cc m

If there is a need for a crystal unit that is considered difficult to handle with standard products, we would appreciate your inquiries once by all means.

Our engineers will review the technology and respond.

Please contact our sales representative for details.


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