Kyocera Stone has developed a built-in crystal vibrator for temperature sensors for portable devices such as smartphones, and has started sample delivery. Qualcomm has introduced a built-in temperature compensation circuit of the mobile phone chipset, Kyocera this product is imagined with Qualcomm chipset with the use of.
Mainly for ordinary mobile phones, smart phones and tablet terminals and so on.
The crystal vibrator developed for this time is "CT2520DB". The scale is 2.5mm × 2.0mm × 1.0mm, the same as the usual TCXO (temperature compensation type crystal vibrator) the same scale. In addition to the usual crystal chip, the same package is also embedded in the thermistor as a temperature sensor.
The specific approach is in the ceramic substrate above and below the double-sided set the cavity, the top of the package crystal, the bottom of the package thermistor. So, crystal and thermistor, although not in the same space, but completed a package. Since the thermistor is set in the vicinity of the crystal chip, the temperature compensation can be completed with higher accuracy. The original approach is to use external temperature sensors and other components, there is the accuracy of the question.
As some of Qualcomm's mobile phone chipset has been embedded in the temperature compensation circuit, so the choice of the original TCXO will show some of the temperature compensation redundancy. And Kyocera Jinshi the supply of goods to save some of the way to supply, so the future will have the cost of competition.
Vibration frequency and Qualcomm chipset and other typical frequency of 19.2MHz match. The frequency characteristics of the vibrator are as follows: ± 10 to ± 50 ppm at -30 ° C to + 85 ° C (after the temperature of the chipset

Compensation circuit combined, the accuracy can be advanced to 0.5ppm or so). Series resistance up to 80Ω. Thermoelectricity

Resistance of the resistance at 25 ℃ when the 100kΩ, and so on.