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CO-724, CO-725 Series Oven Controlled Crystal Oscillators (OCXO)


CO-724

Features:
  • Frequencies from 25 MHz to 400 MHz
  • Size Reduced, PC Board Mount Design
  • Low Phase Noise Option
  • AT and SC/IT Cut Crystal
  • SMA connector available
  • Low G-Sensitivity option



VHF OCXO CO-724 SERIES CO-724S SERIES
Frequency
25-400 MHz range
Temperature
Stability
(Temp. Range A)
+15°C to +35°C 		CO-724A38: ±3x10-8
CO-724A18: ±1x10-8* 		CO-724SA18: ±1x10-8
CO-724SA39: ±3x10-9*
(Temp. Range B)
0°C to +50°C 		CO-724B58: ±5x10-8
CO-724B28: ±2x10-8* 		CO-724SB28: ±2x10-8
CO-724SB59: ±5x10-9*
(Temp. Range D)
-20°C to +70°C 		CO-724D17: ±1x10-7
CO-724D58: ±5x10-8* 		CO-724SD58: ±5x10-8
CO-724SD18: ±1x10-8*
(Temp. Range G)
-55°C to +75°C 		CO-724G37: ±3x10-7
CO-724G17: ±1x10-7* 		CO-724SG17: ±1x10-7
CO-724SG38: ±3x10-8*
(Temp. Range F)
-55°C to +85°C 		*Not available with L2 option CO-724SF27: ±2x10-7
CO-724SF58: ±5x10-8*
Aging Standard:
1x10-8/day, (2x10-6/year)
Optional:
5x10-9/day, (1x10-6/year) 		Standard:
2x10-9/day, (5x10-7/year)
G-Sensitivity Low G-Sensitivity option available - Contact factory
Output
Level 		Standard: >0.5 Vrms/50 (+7 dBm); +10dBm optional
Optional: HCMOS, TTL (to 70 MHz), ECL (to 400MHz)
Supply
Voltage (±5%) 		+15 Vdc standard.
Operation from any specified voltage in 12-24 Vdc range optional.
Input
Power 		<4.5 Watts at turn-on (-20°C to +70°C);
<2.5 Watts stabilized at 25°C.
Higher power required beyond -20°C to +70°C,
lower power for 0°C to +50°C
Frequency
Adjustment 		Multi-turn screwsriver adjust. settable to <1x10-8
Option "V" - electronic tuning: 0.5ppm over 0/6V in CO-724 Series. 0.2ppm over 0/6V in CO-724S Series.
Size <150 MHz: 2" x 2" x 1". > 150MHz: 2" x 2" x 1.25"
Configuration Pins for pcb mounting.
Option "W" for SMA connector and terminals on side,
studs on base.
Phase Noise
724S
(typical static conditions,
sine output in
75-125 MHz range)
Offset Standard Option (L2) **
100 Hz -115 dBc/Hz -130 dBc/Hz
1kHz -130 dBc/Hz -145 dBc/Hz
50 kHz -145 dBc/Hz -157 dBc/Hz
** available to 200 MHz


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VHF OCXO CO-725 SERIES CO-725S SERIES
Frequency
25-200 MHz range
Temperature
Stability
(Temp. Range A)
+15°C to +35°C 		CO-725A38: ±3x10-8
CO-725A29: ±2x10-9 		CO-725SA18: ±1x10-8
CO-725SA19: ±1x10-9
(Temp. Range B)
0°C to +50°C 		CO-725B58: ±5x10-8
CO-725B59: ±5x10-9 		CO-725SB28: ±2x10-8
CO-725SB29: ±2x10-9
(Temp. Range D)
-20°C to +70°C 		CO-725D17: ±1x10-7
CO-725D28: ±2x10-8 		CO-725SD58: ±5x10-8
CO-725SD59: ±5x10-9
(Temp. Range G)
-55°C to +75°C 		CO-725G37: ±3x10-7
CO-725G38: ±3x10-8* 		CO-725SG17: ±1x10-7
CO-725SG28: ±2x10-8*
(Temp. Range F)
-55°C to +85°C 		*Not available with L2 option CO-725SF27: ±2x10-7*
CO-725SF38: ±3x10-8*
Aging Standard:
1x10-9/day, (3x10-7/year) 		**Standard:
5x10-10/day, (1x10-7/year)
**Optional:
1x10-10/day, to 150 MHz
Output
Level 		Standard: >0.5 Vrms/50 (+7 dBm)
Optional: >1 Vrms/50 (+13dBm) to 125 MHz, ECL (to 200MHz)
Supply
Voltage (±5%) 		+15 Vdc standard.
Operation from any specified voltage in 12-24 Vdc range optional.
Input
Power 		<4.5 Watts at turn-on (-20°C to +70°C)
<2.5 Watts stabilized at 25°C.
Higher power required beyond -20°C to +70°C,
lower power for 0°C to +50°C;
Frequency
Adjustment 		Mechanical adjustment settable to <1x10-8
Option "V" - electronic tuning: 0.3ppm over 0/6V in CO-725 Series. 0.1ppm over 0/6V in CO-725S Series.
Size 2" x 2" x 1.25" (51 x 51 x 32mm)
Configuration Pins for pcb mounting.
Option "W" for SMA connector and terminals on side,
studs on base.
Phase Noise
725S
(typical static conditions,
sine output in
75-125 MHz range)
Offset Standard Option (L2)
100 Hz -105 dBc/Hz -120 dBc/Hz
1kHz -115 dBc/Hz -135 dBc/Hz
50 Hz -125 dBc/Hz -140 dBc/Hz
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CO-724, CO-724S, CO-725, CO-725S,
CO-725L2, CO-725SL2


Dimensions in inches

Pinouts
Pin
*1
**2
3
4
5
 Function
VCXO Input
N/C
RF Output
0 Volts, Case
Supply (+)

*Only with electronic tuning option; otherwise, pin is No Connection. For fine tuning adjustment with the "V" option, connect one end of a 20k wirewound potentiometer to a stable reference voltage, the other end to 0V, Case and wiper arm to VCXO input.

**-5.2Vdc input for ECL logic output option.
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CO724L2 (L2 only), CO-724SL2 (SL2 only)
(to 200 MHz)


Dimensions in inches

Pinouts
Pin
*1
2
3
4
5
 Function
VCXO Input
N/C
RF Output
0 Volts, Case
Supply (+)

*Only with electronic tuning option; otherwise, pin is No Connection. For fine tuning adjustment with the "V" option, connect one end of a 20k wirewound potentiometer to a stable reference voltage, the other end to 0V, Case and wiper arm to VCXO input.
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