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Abracon Corporation (www.abracon.com) Page (1) of (4)
30332 Esperanza
Rancho Santa Margarita, CA-92688
Tel: (949) 546-8000 Fax: (949) 546-8001
Tech-
S
u
pp
ort
@
abracon.com
Frequency Translator & Jitter Attenuator
The ABFT series is an Ultra Low Jitter VCXO based frequency translator; ideally suited to improve Jitter
characteristics of the input signal. This device is designed to provide input clock smoothing - while providing
Phase and Frequency Locked higher frequency translated output.
Typical application would take a 10MHz reference frequency and phase and frequency lock it to either a 20MHz
or a 40MHz Low Jitter VCXO. The implemented technology significan tly attenuates the jitter content of the
10MHz reference signal; while keeping the higher frequency RF Output - Frequency and Phase Coherent with the
input 10MHz reference signal.
Features:
5*7*2 mm SMT, RoHS Compliant reflow-able package
Frequency translation to either 20MHz or 40MHz carrier
+3.3V Supply Voltage
Industrial operating temperature range (-40ºC to +85ºC)
LVCMOS Output
Internal absolute pull range > ±100 ppm allowing for long term drift correction
Applications:
Frequency translation, clock smoothing and jitter attenuation of the input 10MHz reference
Datacom - DSLAM, DSLAR, Access Nodes
Cable modem head end
Base Station - GSM, CDMA
Telecom - SONET/SDH/ATM
Block Diagram
10MHz Reference
Mixer
Comparator
20MHz
or
40MHz
Low Jitter
VCXO
RF Output
_______________________________________________________________________________________________________
Abracon Corporation (www.abracon.com) Page (2) of (4)
30332 Esperanza
Rancho Santa Margarita, CA-92688
Tel: (949) 546-8000 Fax: (949) 546-8001
Tech-
S
u
pp
ort
@
abracon.com
1.0 Electrical Specifications:
Parameters Minimum Typical Maximum Units Notes
Reference Input 10.000 MHz
Reference Input Waveform
Level "1" (Logic High) 2.00 5.50 Volts
Level "0" (Logic Low) 0.80 Volts CMOS & TTL
Compatible
Rise & Fall Time 10.0 ns
Duty Cycle 40 60 %
Translated Output 20.000 MHz LVCMOS
Standard Available Frequencies 20.000 & 40.000 MHz
Operating Temperature Range -40 +85 º C
Current Drain 5.0 10.0 mA
Supply Voltage (Vdd) 3.135 3.30 3.465 Volts
All Inclusive Frequency Stability of
the VCXO ±50.00 ppm
Includes set
tolerance, shift
through reflow,
stability over
temperature, load
pulling, frequency
pushing and 10-years
of Aging
VCXO pull range ±100.0 ppm
Sufficient frequency
pull is designed-in to
provide long-term
frequency lock
capability
RF Output Waveform LVCMOS
Level "1" (Logic High) 0.9*Vdd Volts
Level "0" (Logic Low) 0.1*Vdd Volts
Load 15 pf
Rise & Fall Time 3.0 ns
Duty Cycle 45 55 %
Lock Time 3.0 5.0 ms
Spectral Content
Spurious Response -50 -70 dBc
Phase Noise @ 20MHz Carrier
(Vdd=3.3V)
@ 1,000 Hz offset -134 dBc / Hz
@ 10,000 Hz offset -150 dBc / Hz
@ 100,000 Hz offset -154 dBc / Hz
@ 1,000,000 Hz offset -155 dBc / Hz
_______________________________________________________________________________________________________
Abracon Corporation (www.abracon.com) Page (3) of (4)
30332 Esperanza
Rancho Santa Margarita, CA-92688
Tel: (949) 546-8000 Fax: (949) 546-8001
Tech-
S
u
pp
ort
@
abracon.com
2.0 Free Running VCXO Phase Noise without Lock @ 19.660916MHz carrier
_______________________________________________________________________________________________________
Abracon Corporation (www.abracon.com) Page (4) of (4)
30332 Esperanza
Rancho Santa Margarita, CA-92688
Tel: (949) 546-8000 Fax: (949) 546-8001
Tech-
S
u
pp
ort
@
abracon.com
3.0 Package Outline
4.0 Reel Size: 1k units per reel
5.0 Part Identification
ABFT - MHz - T
Frequency in MHz
20.000 MHz
Or
40.000 MHz
5.0 mm
7.0 mm
