Crystal Oscillator

Crystal Oscillator
Model Name NH37M28LC
Oven-Controlled Crystal Oscillator (OCXO)
for Fixed Communication Equipment
■ Main Application
● Base stations for Mobile communications system(LTE , WiMAX).
● Measuring instrument
● Synthesizer
■ Features
● Excellent Temperature Characteristics.
● Compact. ● Exchanger
● High-end router
● Low power consumption.
● Excellent rise characteristics.
● Excellent phase noise characteristics.
● Excellent Long-term Frequency Stability.
■ Specifications
Model
Item
Measurement condition
Nominal frequency (MHz)
NH37M28LC
10
Supply voltage [VCC] (V)
+5.0 ±5 %
at start
when stable (+25 °C)
Power consumption (W)
Max. 3.5
Max. 1.3
HCMOS level (VOL Max. 0.5 V, VOH Min. 4.5 V)
Output voltage (V)
Symmetry (%)
40 to 60
at 1/2 VCC
Load impedance (pF)
15
Operating temperature range (°C)
−20 to +70
Storage temperature range (°C)
−40 to +85
Stabilization time
Long-term frequency stability
Stabilization Time (Frequency Stability) within
±100 ×10−9 after power on at +25°C ,
based on frequency after 60minutes operation.
Based on frequency after 30 days operation
Max. ±0.5×10−9/day
Based on frequency after 30 days operation
Max. ±50×10−9/year
Max. 10 minutes
Frequency/Temperature characteristics
Max. ±5.0×10−9
Frequency/Voltage coefficient
VCC +5 V ± 5 %
Max. ±1.0×10−9
Frequency control range
Vcont +2.0 ± 2.0V
Min. ±500×10−6
Frequency change polarity
Positive
■ Reference Value
Phase noise
(at 10 MHz)
■ List of Ordering Codes
Offset frequency
dBc/Hz
1 Hz
10 Hz
100 Hz
−80
−120
−140
1 kHz
−145
10 kHz
−150
Nominal
frequency
(MHz)
10
Ordering Code
NH37M28LC-10M-NSA3487A
The above frequencies are NDK’s standard frequencies.
Frequencies other than the above are available. Feel free to
contact our sales representatives.
The value of phase noise changes when the frequency changes.
■ Dimensions
37 max.
33.1
mm
#3
#4
#2
#5
STAND OFF
(4POINT)
#1
17.78±0.3
25.4±0.3
19 max.
28 max.
#1
#6
2.54±0.3
Vcont
#2
NC
#3
VCC
#4
OUTPUT
#5
NC
#6
GND
17.8±0.3
6.2±1.0
6-φ0.8±0.1
15.24±0.3
0.65±0.3
24.0
Pin connections
Tolerance ±0.5mm
-6-
13A_0604_NH37M28LC_e