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CO-734, CO-737, CO-738S Series Oven Controlled Crystal Oscillators (OCXO)


CO-737, CO738-S

Features:
  • Frequencies from 5 MHz to 50 MHz
  • Miniature PC Board Mount
  • Ultra-High Temperature Stability
  • Superior Aging Characteristics
  • Very Fast Warm-up



OCXOs - Minature Board Mount  
  CO-734 Series
Frequency 5 MHz and 10 MHz standard *
Temperature Stability
(Temp. Range A)
+15°C to +35°C
CO-73[  ]  A38: ±3x10-8
                A59: ±5x10-9
                A29: ±2X10-9
(Temp. Range B)
0°C to +50°C
CO-73 [  ]  B58: ±5x10-8
                 B18: ±1x10-8
                 B59: ±5x10-9
(Temp. Range D)
-20°C to +70°C
CO-73[  ]  D17: ±1x10-7
                 D38: ±3x10-8
                 D18: ±1x10-8
(Temp. Range E)
-40°C to +76°C
CO-73[  ]  E27: ±2x10-7
                 E58: ±5x10-8
                 E28: ±2x10-8
Aging [ 4 ] 1x10-8/day (2X10-6/year)
[ 7 ] 1x10-9/day (3x10-7/year)
vs Supply 5x10-9 per percent
Short Term (Allan Variance) 5x10-11 per second
Warm-up (Restabilization)
(freq. relative to that 2 hrs. after turn-on, following 24 hrs. off at 125°C with max ambient of 170°C)
1x10-6 5 minutes
1x10-7
7 minutes
3x10-8 10 minutes
1x10-8 30 minutes
Output/Supply Voltage (±5%)
Output Supply
Standard: >.5 Vrms
into 50 (+7dBm)
+15 Vdc
Option "R": >1.0 Vrms
into 50 (+13dBm)
+15 Vdc
Option "J": HCMOS/TTL +15 Vdc and +5 Vdc
Option "N": HCMOS/TTL +5 Vdc
Harmonics & Subharmonics 20 dB below desired output. Internal multiplication is generally used above 12 MHz
Input Power 6 watts at turn-on; less than 2.5 watts stabilized at +25°C
Phase noise (typical)
(with sinwave output
4-12 MHz)
Offset Phase Noise
10 Hz
-100 dBc/Hz
100 Hz
-135 dBc/Hz
1 kHz
-145 dBc/Hz
10 kHz
-150 dBc/Hz
50 kHz
-150 dBc/Hz
Frequency Adjust
(Tuning via Ext potentiometer)
10 ppm typical range for 0 to 6V control
Mechanical Package mounting 1.5"x1.25"x0.86"
(38x32x22mm); Pins for PC board
Option "C": European CO-08. 1.4"x1.06"x0.76"
(35.3 x 26.9 x 19.4mm)


* Other frequencies available in 4-50 MHz range with sine output and in 32 kHz-17 MHz range with logic output. See Series CO-724 for 50-400 MHz and CO-725 for 50-200 MHz.


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OCXOs - Minature Board Mount  
  CO-738S Series
Frequency 5 MHz and 10 MHz standard *
Temperature Stability
(Temp. Range A)
+15°C to +35°C
CO-738S[  ]  A19: ±1x10-9
                    A510: ±5x10-10
                    A310: ±3X10-10
(Temp. Range B)
0°C to +50°C
CO-738S[  ]  B18: ±1x10-8
                     B19: ±1x10-9
                     B510: ±5x10-10
(Temp. Range D)
-20°C to +70°C
CO-738S[  ]  D18: ±1x10-8
                     D59: ±5x10-9
                     D29: ±2x10-9
(Temp. Range E)
-40°C to +76°C
CO-738S[  ]  E58: ±5x10-8
                     E18: ±1x10-8
                     E59: ±5x10-9
Aging 5X10-10/day (1x10-7/year) 4 to 32 MHz only
5x10-8/year optional at some frequencies
vs Supply 1x10-9 per percent
Short Term (Allan Variance) 5x10-12 per second
Warm-up (Restabilization)
(freq. relative to that 2 hrs. after turn-on, following 24 hrs. off at 125&176;C with max ambient of 170&176;C)
1x10-6
2 minutes
1x10-7
2.5 minutes
3x10-8 3 minutes
1x10-8 4 minutes
Output/Supply Voltage (±5%)
Output Supply
Standard: >.5 Vrms
into 50 (+7dBm)
+15 Vdc
Option "R": >1.0 Vrms
into 50 (+13dBm)
+15 Vdc
Option "J": HCMOS/TTL +15 Vdc and +5 Vdc
Option "N": HCMOS/TTL +5 Vdc
Harmonics & Subharmonics 20 dB below desired output. Internal multiplication is generally used above 12 MHz
Input Power 6 watts at turn-on; less than 2.5 watts stabilized at +25°C
Phase noise (typical)
(with sinwave output
4-12 MHz)
Offset Phase Noise
10 Hz
-120 dBc/Hz
100 Hz -140 dBc/Hz
1 kHz
-145 dBc/Hz
10 kHz -150 dBc/Hz
50 kHz -150 dBc/Hz
Frequency Adjust
(Tuning via Ext potentiometer)
2x10-6 typical for 0 to 6V control
Mechanical Package mounting 1.5"x1.25"x0.86"
(38x32x22mm); Pins for PC board
Option "C": European CO-08. 1.4"x1.06"x0.76"
(35.3 x 26.9 x 19.4mm)

 
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CO-734/737/738S

Dimension in inches
 
Pinouts
1
2
3
4
5
Elec. Freq. Adjustment
+5V for logic, N/C if sine output
Output
GND
B+
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