TCXO for GPS
25 November 2008
Epson Toyocom has announced the development of a new, smaller, frequency-stable TCXO.
The new TCXO (temperature-compensated crystal oscillator) with frequency stability high enough for demanding GPS applications, is housed in a 2016-sized package. With actual dimensions of 2.1mm x 1.7mm, the TG-5025BA oscillator is in the world's smallest category of packages.
The market for GPS capability in mobile terminals has been expanding and this has driven demand for frequency-stable TCXOs that are essential for accurate positioning. The TG-5025BA is equipped with a photo AT chip, a very small, crystal chip microfabricated using Epson Toyocom's QMEMS technology. In addition to minimal variability of characteristics, the new oscillator promises high reliability thanks to the use of internal wire bonding and the company’s NPO (New Platform Oscillator) structure. In the NPO structure, the crystal unit (encased in a ceramic package) is sealed together with an oscillation circuit in a moulded plastic housing. This structure reduces the susceptibility of frequency to changes in ambient temperature. Epson Toyocom's IC design technology brings additional advantages to the TG-5025BA, including precise temperature compensation, low power consumption (since driving is performed at voltages as low as 1.68V), and an output frequency range of 13MHz -52MHz.
The TG-5025BA boasts a 36% smaller footprint and a 43% smaller cubic volume than its predecessor, but despite its size it has a frequency-temperature co-efficient of 0.5 x 10-6, a rating equivalent to that of a TCXO in a conventional package size.
Commercial development is scheduled for February 2009, and the oscillator will be available through the distributor Rutronik.
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