Datasheet

OCXO CMOS Output High Performance
HCD681
Specifications
Product
Parameters
Frequency range:
HCD681
5.0 ~ 20.0MHz



Frequency stability:
< 1x10-7 per year (option D)
< 2x10-8 per year (option F)
< 1x10-9 per 10% change in VDD
< 5x10-10 per 10% change in load




< 1x10-8
< 5x10-9
< 3x10-9
< 1x10-9




R
S
T
V
Operating temperature range:
-10 to +60°C
-20 to +70°C
-40 to +70°C



C
F
G
Storage temperature range:
-40 to +90°C

Output waveform:
CMOS / TTL compatible

24.50
(max)
5.60
1.00Ø
40.64
4
5
50.80
40.64
3
2
1
50.80
BOTTOM VIEW
PIN
CONNECTION
VOLTAGE CONTROL
1
Freq adjustment
2
Ref voltage out
3
RF output
4
Ground
5
Supply
2
1
10k multi-turn
1k
4
Features




Temperature stability down to 1ppb
Single 12V supply (12V ~ 30V optional)
Standard US footprint & pin-out
“Best in class” close-in phase noise option

Ageing per day (at despatch):
< 1x10-9
< 5x10-10
< 2x10-10
Temperature stability:
0.50
Option
Codes
Frequency adjustment:
±5x10-7 (typ) over +0.5 to +7.0V
(sufficient for 10 years ageing min)
Stabilised +7.0V supply provided
D
E
F

Supply voltage (VDD): +12V (±0.5V)
Other options from 12~30V


Power consumption:
5.0W max at switch on
1.2W typ when stabilised at 25°C


Warm up:
< 1x10-8 after 8mins at +20°C

Allan deviation (ADEV), 1 sec:
< 5x10-13 over 1 sec (5.0MHz)
< 1x10-12 over 1 sec (10.0MHz)


Close-in phase noise (@ 5.0MHz):
< -110 dBc/Hz @ 1Hz, <-135 @ 10Hz
< -123 dBc/Hz @ 1Hz, <-140 @ 10Hz
< -150 dBc/Hz @ 100Hz



Z
Close-in phase noise (@ 10.0MHz):
< -95 dBc/Hz @ 1Hz, <-130 @ 10Hz
< -108 dBc/Hz @ 1Hz, <-135 @ 10Hz
< -145 dBc/Hz @ 100Hz



Z
Far-out phase noise (all freqs):
< -155 dBc/Hz @ 1kHz
< -157 dBc/Hz @ 10kHz
< -157 dBc/Hz @ 100kHz



< -30dB wrt carrier

Harmonics:
N
specify
 Standard.  Optional - Please specify required code(s) when ordering
Ordering Information
Part No, or product name + option codes + frequency
eg: HCD681/FTFN 10.0MHz
Option code X (eg HCD681/X) denotes a custom specification.
Tel: +44 1460 256 100
05 Mar 2013
Fax: +44 1460 256 101
E-mail: [email protected]
Web: www.golledge.com