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Crystal Oscillator
NH25M22WH
Oven Controlled Crystal Oscillator (OCXO)
for Fixed Communication Equipment
■ Main Application
● Base stations for system mobile communications ● Optical transmission system
● Measuring instrument
● Synthesizer
● Exchanger
● High-end router
■ Features
● Excellent temperature characteristics. (Max. ±3×10-9)
● Excellent long-term frequency stability.(Max. ±30×10-9 / year)
● Excellent phase noise characteristics at frequency offsets.
(-100dBc / Hz at 1Hz offset)
■ Specifications
Model
Item
Measurement condition
Nominal frequency (MHz)
NH25M22WH
10
Supply voltage [VCC] (V)
+5 ±5 %
at start
Power consumption (W)
Max. 3
when stable (+25 °C)
Max. 1.1
HCMOS level (VOL Max. 0.5 V, VOH Min. 3.5 V)
Output voltage
at+(VOH + VOL) / 2
Symmetry (%)
40 to 60
Load impedance (pF)
15
Operating temperature range (°C)
0 to +70
Storage temperature range (°C)
−40 to +85
Stabilization Time (Frequency Stability) within
±500 ×10−9 after power on at +25°C ,
based on frequency after 60minutes operation.
Stabilization Time (Frequency Stability) within
±50 ×10−9 after power on at +25°C ,
based on frequency after 60minutes operation.
Stabilization time
Long-term frequency stability
Based on frequency after 30 days operation
Max. 90 seconds
Max. 3 minutes
Max. ±1×10−9/day
Max. ±30×10−9/year
Frequency/Temperature characteristics
0 to +70 °C
Max. ±3×10−9
Frequency/Voltage coefficient
VCC +5 V ± 5 %
Max. ±3×10−9
■ Dimensions
■ Reference Value
mm
17.8±0.1
7.62±0.10
25.4±0.3
Terminal land connections
DNC (Do not connect)
#2
DNC
#3
VCC
#4
OUTPUT
#5
DNC
#6
DNC
#7
GND
Nominal frequency
(MHz)
10
#7 #6
Typ. −100
10 Hz
Typ. −125
100 Hz
Typ. −142
1 kHz
Typ. −152
10 kHz
Typ. −152
τ=1
Typ. 3.8×10−12
Ordering Code
NH25M22WH-10M-NSA3628A
We offer a test instrument(charge) for measuring accurately.
The above frequency are NDK’s standard frequency.
Frequencies other than the above are available. Feel free to
contact our sales representatives.
#3
2.5±0.3
#2
dBc/Hz
1 Hz
■ List of Ordering Codes
2.5±0.3
#1
Phase noise
(at 10 MHz)
Short-term
frequency
stability
(at 10MHz)
14.3±0.5
22±0.3
#1
Offset frequency
#5 #4
-5-
1501B_NH25M22WH_e