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ClearClock™ | Ultra-Low Jitter, Fixed-Frequency Miniature Clock Oscillator

AK2

Product Description

Abracon’s latest addition to the ClearClock

family of ultra-low rms jitter oscillators is now available in a miniature 2.5 x 2.0 x

1.0 mm package. The AK2 family is based on 3rd overtone quartz crystal technology and is ideally suited for optical transceivers,

networking and server systems. AK2 family is available with bias voltages of 3.3V and 2.5V for LVDS & LVPECL output

configuration; and 3.3V, 2.5V & 1.8V for HCSL differential output. Production-ready frequencies include 100, 125, 148.5, 156.25

and 200MHz with better than ±30 ppm frequency stability over -40°C

to +85°C operating temperature range.

The AK2 family offers best-in-class rms phase jitter of <110 fs typical at 156.25MHz carrier @ V

= +2.5V with LVDS output, and

is guaranteed to exhibit <200fs rms jitter @ 156.25MHz carrier with any bias voltage and RF output configuration.

2.5 x 2.0 x 1.0 mm

RoHS/RoHS II

Compliant

MSL = 1

ESD Sensitive

Features

•

Based on 3rd Overtone, Quartz Crystal Technology

•

Ultra-low rms jitter; < 120fs typical @ 156.25MHz

•

Lowest in-class power consumption (15mA max with LVDS)

•

±25ppm max & ±30ppm max stability over -20°C to +70°C

and -40°C to +85°C respectively

•

3.3V, 2.5V & 1.8V supply voltage options

•

LVPECL, LVDS and HCSL differential output options

•

Output enabled (Active High standard default)

Applications

•

Optical Transceivers

Optical Modules

Networking and communications

Gigabit Ethernet

Fibre Channel

SONET/SDH

RF systems, base stations (BTS)

Datacenter

PCI Express

Test & measurement

Active cables

Compact HD-SDI cameras

Options and Part Identification

[Note 1]

AK2

(1): Output

P: LVPECL

D: LVDS

H: HCSL

(6): Packaging

(3): Stability over OTR

D: ±25ppm over -20°C to +70°C

F: ±30 ppm over -40°C to +85°C

Blank: Bulk (***)

T: Tape & Reel 1,000 units

T3: Tape & Reel 3,000 units

(***) MOQ: 100 units

A: 3.3V

B: 2.5V

C: 1.8V (*)

(*) Excluding

LVPECL

(2): V

(4): OE Function

1: OE Pin 1; Active High

2: OE Pin 2; Active High

(5): Output Frequency

in MHz

Please specify the frequency in

units of MHz out to

4 digit

accuracy after the decimal.

Example:

“156.2500”=156.25MHz

Part Number Example:

AK2PAF1-156.2500

AK2PAF1-156.2500T

AK2PAF1-156.2500T3

[(100) units in Bulk]

[(1k) units on Tape & Reel]

[(3k) units on Tape & Reel]

Note 1: Contact Abracon for non-standard part number configurations and/or requests with carrier frequency callouts up to 5 & 6 digit accuracy after the decimal.

5101 Hidden Creek Ln Spicewood TX 78669

Phone: 512-371-6159 | Fax: 512-351-8858

For terms and conditions of sales, please visit:

www.abracon.com

ABRACON IS

LLC

REVISED:

09.06.2019

ISO9001-2015

CERTIFIED

ClearClock™ | Ultra-Low Jitter, Fixed-Frequency Miniature Clock Oscillator

AK2

Electrical Characteristics

Parameters

Frequency Range

Standard Available Frequencies

Supply Voltage (V

)

Supply Current (I

)

Operating Temperature Range

Storage Temperature

Frequency Accuracy (Initial Set-Tolerance, as received

stand-alone measured frequency)

[Note 3]

at time of shipment (Pre-Reflow) @ +25°C

Frequency Shift through Reflow

Frequency Stability over

Operating Temperature Range

First Year Aging

Aging over 20 Year Product Life

[Note 4]

All-Inclusive Frequency Accuracy (Total Stability)

over 20 Year Product Life

[Note 5]

Rise (Tr) / Fall (Tf) Time

20% to 80% V

peak to peak

Duty Cycle

Start-up Time

LVPECL

LVDS

HCSL

[Note 2]

ESD Sensitive

2.5 x 2.0 x 1.0 mm

RoHS/RoHS II

Compliant

MSL = 1

Min.

100

Typ.

Max.

200

Unit

MHz

Notes

Contact Abracon for availability

of frequencies not listed

Option “A”

Option “B”

Option “C”

@ 200MHz; @ V

= 3.3V

@ 200MHz; @ V

= 3.3V

@ 200MHz; @ V

= 3.3V

Option “D”

Option “F”

100, 125, 148.5, 156.25, 200

2.97

2.37

1.71

3.3

2.5

1.8

3.63

2.62

1.89

+70

+85

+150

+10

LVPECL

LVDS

HCSL

°C

ppm

-20

-40

-55

-10

< ±5

Relative to carrier frequency

Relative to as received frequency

Option “D” (-20°C to +70°C)

Option “F” (-40°C to +85°C)

Maximum first year aging

±2.00 ppm max. per year thereafter

-25

-30

-3

-15

-52

-57

0.3

-2

+25

+30

+15

+52

+57

0.6

0.5

0.6

5.0

Option “D” (-20°C to +70°C)

Option “F” (-40°C to +85°C)

@ V

=3.3V, R

=50Ω

@ V

=3.3V, R

=100Ω

@ V

=3.3V, R

=50Ω to GND

Note 2:

Note 3:

Note 4:

Note 5:

Supply voltage (Vdd) = 1.8V option not available with LVPECL output

Relative to initial measured frequency @ +25°C, pre-reflow

Relative to post-reflow frequency

Includes post reflow frequency accuracy, temperature stability, load pulling, power supply variation, and 20-year aging

LLC

5101 Hidden Creek Ln Spicewood TX 78669

Phone: 512-371-6159 | Fax: 512-351-8858

For terms and conditions of sales, please visit:

www.abracon.com

ABRACON IS

REVISED:

09.06.2019

ISO9001-2015

CERTIFIED

ClearClock™ | Ultra-Low Jitter, Fixed-Frequency Miniature Clock Oscillator

AK2

Electrical Characteristics Cont.

Parameters

LVPECL

Differential

Output High Voltage (V

)

Output Low Voltage (V

)

LVDS

HCSL

2.5 x 2.0 x 1.0 mm

RoHS/RoHS II

Compliant

MSL = 1

ESD Sensitive

Min.

-1.03

-1.85

0.90

0.40

-0.15

0.50

0.25

0.50

0.7*(V

)

Typ.

Max.

-0.88

-1.60

1.60

0.85

0.15

0.45

Unit

Notes

=50Ω to V

–2.0V

1.40

1.10

0.74

0.00

0.35

=100Ω between both outputs

=50Ω to ground on each

output

LVPECL

Output Voltage Swing

LVDS

HCSL

Output Enable or No Connect

Output Disable (High Impedance)

Output Enable & Disable Control

Output Enable Time

Output Disable Time

Output Disable Current Consumption

RMS Phase Jitter (12kHz to 20MHz from Carrier)

< 2.00

0.3*(V

)

5.00

0.2

< 10

μs

μA

fsec

OE ≤ 0.3V

Vdd, RF output type and Carrier

frequency dependent

@ 156.25MHz

< 200

< 150

500

200

LLC

5101 Hidden Creek Ln Spicewood TX 78669

Phone: 512-371-6159 | Fax: 512-351-8858

For terms and conditions of sales, please visit:

www.abracon.com

ABRACON IS

REVISED:

09.06.2019

ISO9001-2015

CERTIFIED

ClearClock™ | Ultra-Low Jitter, Fixed-Frequency Miniature Clock Oscillator

AK2

2.5 x 2.0 x 1.0 mm

RoHS/RoHS II

Compliant

MSL = 1

ESD Sensitive

Phase Noise Test Setup

•

Keysight E5052B Signal Source Analyzer

Integration Bandwidth = 12kHz to 20MHz

Spurious Activity (entire plot trace) = Not omitted (Normalized in dBc/Hz)

Specifed Spur Omission Function = Not enabled

IF Gain = 20dB

Correlation = 5

Average = 3

Typical Values measured at 25⁰C ± 3⁰C

Note 6:

Note 7:

Guaranteed by characterization; rms Phase Jitter specifications are inclusive of any spurs

Phase jitter measured with Keysight E5052B Signal Source Analyzer at 25⁰C±3⁰C

LLC

5101 Hidden Creek Ln Spicewood TX 78669

Phone: 512-371-6159 | Fax: 512-351-8858

For terms and conditions of sales, please visit:

www.abracon.com

ABRACON IS

REVISED:

09.06.2019

ISO9001-2015

CERTIFIED

ClearClock™ | Ultra-Low Jitter, Fixed-Frequency Miniature Clock Oscillator

AK2

2.5 x 2.0 x 1.0 mm

RoHS/RoHS II

Compliant

MSL = 1

ESD Sensitive

Representative Phase Noise Plots @ +25°C

[Note 8]

F= 100.00MHz | V

=2.50V | LVPECL

RMS Phase Jitter = 137 fsec

Note 8:

Contact Abracon for phase noise plots at alternative supply voltage (Vdd) & differential output formats

5101 Hidden Creek Ln Spicewood TX 78669

Phone: 512-371-6159 | Fax: 512-351-8858

For terms and conditions of sales, please visit:

www.abracon.com

ABRACON IS

LLC

REVISED:

09.06.2019

ISO9001-2015

CERTIFIED