Download Wide-temperature-range, high-stability TCXO for optical

October 11, 2012
Nihon Dempa Kogyo Co., Ltd.
President: Hiroshi Takeuchi
Wide-temperature-range, high-stability TCXO
for optical communication systems or mobile base stations developed
Nihon Dempa Kogyo Co., Ltd. has developed a temperature compensated crystal oscillator
(TCXO) that meets the standard for reference signal oscillators used for optical communication
systems or mobile base stations. The new TCXO shows frequency temperature characteristics of
max. ±50 ppb in the temperature range from -40°C to +85°C, achieving the world's top-level high
stability in this very wide temperature range for a TCXO (dimensions 14.6×9.7×6.5 mm, output
frequency range 5 to 40 MHz).
As the optical communication systems use more and more network devices to support even faster
and more data communications, the need for reducing the increasing power consumption has become
a challenge. Reference signal oscillators used in such devices are required to achieve both high
stability in frequency over a wide temperature range and substantial reduction of power
consumption.
To respond to the needs, NDK has made use of its own high-stability oscillation technology
accumulated with oven controlled crystal oscillator (OCXO) and its proprietary digital signal
processing IC in developing the new TCXO. As a result, the new TCXO achieves the temperature
characteristics equivalent to those of OCXOs while keeping the typical feature of low power
consumption as TCXOs, contributing to lower power consumption of optical communication
systems and mobile base stations.
Delivery of product samples is planned to be launched in March 2013 and mass production in
May 2013.
<Contact> Sales Representative, Nihon Dempa Kogyo Co., Ltd.
e-mail: [email protected]
* For sample requests, please contact NDK sales personnel or send e-mail to
the address above.
The detailed specifications are shown below:
Specifications
Nominal frequency range
5 to 40 MHz
Power supply voltage
+3.3V ±5%
Current consumption
Typ. 20mA
Power consumption
Typ. 70mW
Overall frequency tolerance (*)
Max. ±100×10-9
Frequency temperature characteristics
Max. ±50×10-9
Operating temperature range
-40 to +85°C
Long-term frequency stability
Typ. ±100×10-9/year
(based on frequency after 24 hours operation)
Output voltage
CMOS
Variable frequency range
Min. ±5×10-6
Phase noise
Typ. -60 dBc/Hz (@1Hz offset)
(@19.2MHz, 25°C)
Typ. -85 dBc/Hz (@10Hz offset)
Typ. -115 dBc/Hz (@100Hz offset)
Typ. -140 dBc/Hz (@1kHz offset)
Typ. -145 dBc/Hz (@10kHz offset)
(*) Overall frequency tolerance includes frequency temperature stability, voltage coefficient and
load coefficient
External Dimensions