August 3, 2020
Nihon Dempa Kogyo Co., Ltd.
Representative Director and President
Hiromi Katoh
Development of the industry's first (*1) compact,
high-frequency temperature-compensated crystal oscillator
Nihon Dempa Kogyo Co., Ltd. has developed a low phase-noise TCXO (temperature-compensatedcrystal oscillator) that is 1.6 x 1.2 x 0.45mm-sized and is compatible with the industry's firsthigh-frequency, and reduces the degradation of phase noise, resulting in the industry's highest levelof-160dBc/ Hz@100kHz offset (*2). Sample shipments will start from September 2020.
Rapid growth in 5G and Beyond 5G, as well as in 6G and other mobile high-speed communications,next-generation Wi-Fi and other wireless stations that will be developed in the future, is anticipating atighter spectrum in the future, so the promotion of the efficient use of radio waves is urgently needed.
One solution to this problem is the establishment of technology for the effective use of radio waves in
the high frequency band.
In order to support high frequency band wireless communication, it is necessary to increase themultiplication number of the frequency generated by the reference oscillation source inside thecommunication device. However, as the multiplication number increases, the noise component
increases, resulting in reception sensitivity deterioration or communication efficiency deterioration
due to the deterioration of the modulation accuracy (deviation between the phase and amplitude of thesignal).
As one of the countermeasures, the multiplication factor is reduced by increasing the frequency of thereference oscillator inside the device, which leads to the maintenance and improvement of radio
properties. Therefore, it is anticipated that the demand for high-frequency low-phase noise TCXO will
increase from customers for 5G smartphone applications and other applications in the future.
Last year, we announced a compact temperature-compensated crystal oscillator with an output ofup to 52MHz, which possesses the industry's highest phase noise characteristics. While maintaining
its characteristics, we have worked to increase the frequency to 104MHz, which is twice thefrequency.
We have recently developed the industry's first high-frequency, low-phase noise TCXO by using
high-Q synthetic quartz crystals (*3) developed at high quality, optimizing crystal resonator designs
through photolithography processes, and reducing noise in oscillator circuits that are compatible withhigh frequencies.
・Floor noise-160 dBc/Hz @100 kHz offset (*2)
・Phase jitter (*4)
110fs @12kHz to 20MHz
We plan to use this technology to gradually expand our product lineup to other sizes.
(*1) In July 2020, our investigation(*2) Oscillation frequency: 76.8MHz, Temperature: +25°C(*3) A crystal resonator represents the degree of sharpness of the resonance. A larger (higher) valuemeans that the vibration is more stable.
(*4) This refers to the time-axis deviation or fluctuation that occurs in a waveform when transmittinga digital signal.
[Product Appearance][Sample / Mass production]
Sample shipments are scheduled for September 2020, and mass production is scheduled for March2021.
[Specifications / Characteristics]
Model name

NT1612AJA

Dimensions

1.6 x 1.2 x 0.45mm

ELECTRICAL CHARACTERISTICS
Nominal Frequency

24MHz to 104MHz

Standard Frequency

76.8MHz

Supply Voltage (Vcc)+1.8V +/- 5% (Note 1)

Load Impedance

10kΩ//10pF

Operating Temperature Range-30 deg.C to +85 deg.CCurrent Consumption

Max. 5.0mA /76.8MHz (Enable)
Max. 5.0uA /76.8MHz (Disable)

Output Voltage

Min. 0.8 V(p-p) (DC Coupling (Note 2))

Frequency Temperature Characteristics

Max. +/- 0.5 × 10-6

Long-term Frequency Stability

Max. +/- 2.0 × 10-6/year (at +25℃)(Note 1) DC+1. 7V to +3. 6V are available.
(Note 2) The DC cut capacitor is not built in. Connect the capacitor (1,000pF) in series with theoscillator output line.
[Example of Phase Noise Characteristic Data]
Condition: Nominal frequency 76.8MHz, temperature +25 deg.C

For more information on the product, please contact:[Contact Info]
e-Mail : ndkpr-m@ndk.com