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Crystal Oscillator
NH37M28LN
High Precision Oscillator (Twin-OCXO)
for Fixed Communication Equipment
■ Main Application
● Base stations for system mobile communications ● Synthesizer
■ Features
● Exchanger
●Measuring instrument
● High-end router
● Low height and excellent temperature characteristics.
● Supports wide temperature range (–40 to +85 °C)
● Frequency adjustment by digital control method (I2C control).
(Voltage contorol method (Vcont) is also possible.)
■ Specifications
Model
Item
Measurement condition
Nominal Frequency Range (MHz)
NH37M28LN
10
Supply Voltage [VCC] (V)
+5.0 ±5 %
at start
Power Consumption (W)
Typ. 3.0 (Max. 3.5)
when stable (+25 °C)
Max. 1.6
Output Voltage
LVCMOS (VOL Max. 0.4 V, VOH Min. 2.4 V)
Symmetry (%)
45 to 55
Load Impedance (pF)
15
Operating Temperature Range (°C)
–40 to +85
Storage Temperature Range (°C)
–40 to +85
Stabilization Time
Stabilization Time (Frequency Stability) within
±10 ×10−9 after power on at +25°C ,
based on frequency after 60minutes operation.
Long-term Frequency Stability
Based on frequency after 7 days operation
Frequency/Temperature Characteristics
VCC +3.3 V ±5 %
Frequency Control Range
Vcont +0.2 V to +2.8 V (@ +1.5V)
Frequency Change Polarity
Frequency Change Polarity
Linearity
Positive
Typ. 5%
mm
Pin connections
*NSA3650A : Vcont, DNC
NSA3649A : SCL, SDA
Vcont / SCL(I2C) *
#1
#2 DNC(Don't connect)/ SDA(I2C) *
#3
VCC
#4
OUTPUT
#5
DNC(Don't connect)
#6
DNC(Don't connect)
#7
DNC(Don't connect)
#8
DNC(Don't connect)
#9
DNC(Don't connect)
#10
GND
0.65
Max.12.7
Max. 28.0
Max. 37.0
Typ. –110
100 Hz
Typ. –135
1 kHz
Typ. –152
10 kHz
Typ. 157
100 kHz
Typ. –160
Specification Number
Voltage control
(Vcont)
0 to 5.0V
NSA3650A
Digital control
(I2C control)
0x800000
to 0x7FFFFF
NSA3651A
STAND OFF
㸦4POINT㸧
#4
#5
#6
12.70
10.16
7.62
5.08
2.54
#7
#10
5×Ø0.45±0.15
Typ. –83
10 Hz
dBc/Hz
■ *1 Specification Number
Control Range
Min.3.0
Offset
Frequency
1 Hz
0#9
17.8±0.3
25.4±0.3
17.78±0.30
Phase Noise
(at 10 MHz)
Frequency control
method
15.24±0.30
5×Ø0.80±0.15
#1
±0.3 to ±0.5×10–6
■ Reference Value
Pin number is not printed
#8
Max. ±50×10–9/year
±0.2×10–9
■ Dimensions
#2
Max. ±0.2×10–9/day
Max. ±0.5×10–9
Frequency/Voltage Coefficient
#3
Max. 5 minutes
Tolerance ±0.2
-5-
Please specify the model name, frequency, and specification number
when you order products.
For further questions regarding specifications, please feel free to
contact us.
1604A_NH37M28LN_e