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CDKD type delay line is an LTCC (Low Temperature Co-fired Ceramic) chip-type differential delay line. It covers 1/4 of the area and, yet, due to ELMEC’s own high-density monolithic LC structure, it maintains a passband higher than the CDAD-type Delay Lines.
Crosstalk is reduced and, even for GHz-level high-speed signals, it can maintain a stable, differential impedance. It is a RoHS-compliant component.
Care and Handling of LTCC Products
| 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
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50ps Max.
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720ps Max.
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DC～600MHz
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DC～480MHz
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7.5 ΩMax.
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(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.
Unit:mm(inch)
Tolerance:±0.1(±0.004)
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Part Number
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Dimension of T
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| CDKD0105~CDKD0505 |
1.0Max(0.039Max) |
| CDKD0605~CDKD2005 |
2.0Max(0.079Max) |
| CDKD2505, CDKD3005 |
2.5Max(0.098Max) |
| CDKD3505~CDKD5005 |
3.0Max(0.118Max) |
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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.
Unit:mm (inch)
Tolerance:±0.1(±0.004)
T: 5(0.197)Max
Direction of Feed
br>
No 1 pin
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DIMENSIONS OF REEL
Unit:mm (inch)
Tolerance:±0.1(±0.004)
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
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(1) ECL (-2V termination line used)
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(2) PECL
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(3) ECL LVPECL
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(4) Twisted Pair Termination
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(5) LVDS
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
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Output Waveforms
CDKD0505
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Output waveform (Step function)
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Amplitude / Frequency
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Output waveform (2GHz Clock)
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Group Delay
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CDKD1005
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Output waveform (Step function)
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Amplitude / Frequency
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Output waveform (1GHz Clock)
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Group Delay
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CDKD1505
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Output waveform (Step function)
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Amplitude / Frequency
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Output waveform (667MHz Clock)
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Group Delay
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CDKD2005
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Output waveform (Step function)
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Amplitude / Frequency
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Output waveform (500MHz Clock)
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Group Delay
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CDKD3005
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Output waveform (Step function)
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Amplitude / Frequency
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Output waveform (333MHz Clock)
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Group Delay
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CDKD5005
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Output waveform (Step function)
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Amplitude / Frequency
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Output waveform (200MHz Clock)
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Group Delay
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Initially developed only as a RoHS-compliant component.
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