PDF Catalog Download

CDKD-Type
LTCC Multi-layered Differential Delay Lines

CDKD type delay line is an LTCC (Low Temperature Co-fired Ceramic) chip-type differential delay line, also due to ELMEC’s own high-density monolithic LC structure.
Crosstalk is reduced and, even for GHz-level high-speed signals, it can maintain stable, differential impedance and by connecting the 2 differential lines, can also be used as a 2x Td single-ended Delay Line.
It is a RoHS-compliant component.
Care and Handling of LTCC Products

Common Specifications

Impedance: single-ended: 50 W ±10%
differential: 100 W ±10%
Waveform Distortion: Overshoot/preshoot under 20%
Delay Time Temp. Coefficient: 0~150ppm/°C
Insulation Resistance: DC50V, over 100M W
Operating Temperature Range: -40°C to +85°C
Storage Temperature Range: -40°C to +120°C


CDKD Product Specifications

Part Number Delay Time Delay Difference Rise/Fall Time
(20-80%)
-3 dB Passband DC Resistance
Actual(1)* Guarantee(2)*
CDKD0105 100ps ±50ps 10ps Max. 100ps Max. DC~10GHz DC~3GHz 1.0 ΩMax.
CDKD0205 200ps ±50ps 10ps Max. 100ps Max. DC~10GHz DC~3GHz 1.0 ΩMax.
CDKD0305 300ps ±50ps 10ps Max. 100ps Max. DC~10GHz DC~3GHz 1.0 ΩMax.
CDKD0405 400ps ±50ps 10ps Max. 100ps Max. DC~7.5GHz DC~3GHz 1.5 ΩMax.
CDKD0505 500ps ±50ps 10ps Max. 100ps Max. DC~6GHz DC~3GHz 1.5 ΩMax.
CDKD0605 600ps ±50ps 10ps Max. 100ps Max. DC~5GHz DC~3GHz 3.0 ΩMax.
CDKD0705 700ps ±50ps 10ps Max. 110ps Max. DC~4.3GHz DC~3GHz 3.0 ΩMax.
CDKD0805 800ps ±50ps 10ps Max. 120ps Max. DC~3.8GHz DC~3GHz 3.0 ΩMax.
CDKD0905 900ps ±50ps 10ps Max. 130ps Max. DC~3.3GHz DC~2.7GHz 3.5 ΩMax.
CDKD1005 1.0ns ±50ps 10ps Max. 150ps Max. DC~3GHz DC~2.4GHz 3.5 ΩMax.
CDKD1105 1.1ns ±55ps 15ps Max. 160ps Max. DC~2.7GHz DC~2.2GHz 4.0 ΩMax.
CDKD1205 1.2ns ±60ps 15ps Max. 180ps Max. DC~2.5GHz DC~2GHz 4.0 ΩMax.
CDKD1305 1.3ns ±65ps 15ps Max. 190ps Max. DC~2.3GHz DC~1.9GHz 4.5 ΩMax.
CDKD1405 1.4ns ±70ps 15ps Max. 210ps Max. DC~2.1GHz DC~1.7GHz 4.5 ΩMax.
CDKD1505 1.5ns ±75ps 15ps Max. 220ps Max. DC~2GHz DC~1.6GHz 4.0 ΩMax.
CDKD1605 1.6ns±80ps 20ps Max. 240ps Max. DC~1.9GHz DC~1.5GHz 4.0 ΩMax.
CDKD1805 1.8ns±90ps 20ps Max. 270ps Max. DC~1.7GHz DC~1.3GHz 4.5 ΩMax.
CDKD2005 2.0ns ±100ps 20ps Max. 300ps Max. DC~1.5GHz DC~1.2GHz 5.0 ΩMax.
CDKD2505 2.5ns ±125ps 25ps Max. 360ps Max. DC~1.2GHz DC~960MHz 5.0 ΩMax.
CDKD3005 3.0ns ±150ps 30ps Max. 400ps Max. DC~1.1GHz DC~880MHz 5.0 ΩMax.
CDKD3505 3.5ns ±175ps 40ps Max. 510ps Max. DC~860MHz DC~690MHz 6.0 ΩMax.
CDKD4005 4.0ns ±200ps 50ps Max. 600ps Max. DC~750MHz DC~600MHz 7.5 ΩMax.
CDKD4505 4.5ns±225ps 50ps Max. 660ps Max. DC~660MHz DC~530MHz 7.5 ΩMax.
CDKD5005
5.0ns ±250ps
50ps Max.
720ps Max.
DC~600MHz
DC~480MHz
7.5 ΩMax.

(1)* In order to achieve the Actual -3dB passband, it is necessary to input a differential signal into the suggested land pattern.
(2)* The guaranteed value of -3dB passband is limited by the band width of the pin probe during product inspection.


*By connecting the 2 differential lines, can also be used as a single-ended delay line. Please see the CDM page for more information.

Package Dimensions & Pin Configuration

Unit:mm(inch)
Tolerance:±0.1(±0.004)

Top View


Part Number
Dimension of T
CDKD0105~CDKD0505 1.0Max(0.039Max)
CDKD0605~CDKD2005 2.0Max(0.079Max)
CDKD2505, CDKD3005 2.5Max(0.098Max)
CDKD3505~CDKD5005 3.0Max(0.118Max)



CDKD Type Tape and Reel specifications

Packaging of components can be in Tape and Reel for convenience of shipping and storage. The package is embossed with cover tape and contains 500pcs per reel, as shown below. The reel is marked with supplier name, part number, quantities, and lot number.

DIMENSIONS OF TAPE

Unit:mm (inch)
Tolerance:±0.1(±0.004)

T: 5(0.197)Max

Direction of Feed



br> No 1 pin









DIMENSIONS OF REEL

Unit:mm (inch)
Tolerance:±0.1(±0.004)




Suggested Land Pattern

Unit:mm(inch)
Tolerance:±0.1(±0.004)

*How to verify component characteristics without soldering:

By using the Socket shown below, you can verify the component characteristics without soldering. You must attach the Socket to your land pattern. For further details, please see the Socket page.(CS-type)



Reflow Soldering Conditions

Storage conditions are as per MSL1. These component families are not moisture-sensitive. Baking prior to reflow is not required.

J-STD-020C Pb-Free Standard





Typical Applications and Termination Methods

(1) PECL




(2)LVPECL




(3) Twisted Pair Termination




(4) LVDS




(5) CML



[*] Signal GND potential, such as a power supply GND or a Vcc line.


Note: The Delay Line can be used with the GND disconnected, however, in order to obtain superior performance, we recommend that all GND pins should be connected.



Measurement Conditions for Waveform Plot

Measurements Circuit and Data Plot Procedure


Output Waveforms

CDKD0505

Output waveform (Step function)

Amplitude / Frequency

Output waveform (2GHz Clock)

Group Delay


CDKD1005

Output waveform (Step function)

Amplitude / Frequency

Output waveform (1GHz Clock)

Group Delay


CDKD1505

Output waveform (Step function)

Amplitude / Frequency

Output waveform (667MHz Clock)

Group Delay


CDKD2005

Output waveform (Step function)


Amplitude / Frequency


Output waveform (500MHz Clock)

Group Delay


CDKD3005

Output waveform (Step function)

Amplitude / Frequency

Output waveform (333MHz Clock)

Group Delay


CDKD5005

Output waveform (Step function)

Amplitude / Frequency

Output waveform (200MHz Clock)

Group Delay




RoHS Compliance Status

Initially developed only as a RoHS-compliant component.




625 Highway 101, PMB #170 Florence, OR 97439 USA
~ (650) 212-4744 ~ sales @  elmectech.com


Copyright © ELMEC Technology of America, Inc. All Rights Reserved.