ETC C2020

WIDEBAND RF TRANSFORMERS
Upstream Transformers for Set-Top Box
and Cable Modem Applications
Optimized for 5-80 MHz operating frequency
Less than 20 dB return loss
Excellent insertion loss
Operating temperature of -40°C to +85°C
Electrical Specifications @ 25°C — Operating Temperature -40°C to +85°C
Bandwidth 2, 3
Insertion Loss OCL Primary
(MHz TYP)
@ Midband
(µH MIN)
(dB TYP)
3 dB
2 dB
1 dB
C2020
1CT:1CT
1CT:1CT
.150-210
.200-150
.350-90
.54
35
C2022
1:4CT
1:2CT
.100-500
.150-390
.300-220
.45
50
NOTE: Optional Tape & Reel packaging can be ordered by adding a “T” suffix to the part number (ex: C2020T).
Part
Number
1
Impedance Ratio
Pri:Sec
(±2%)
Turns Ratio
Pri:Sec
(±2%)
Mechanical
Return Loss4
5 MHz - 65 MHz
(dB TYP)
Schem.
Primary
Pins
>20 dB
>20 dB
A
B
1-3
1-3
Schematics
LS
6
5
1
4
.258
6,55
.390
9,91
C202X
2
3
.300 MAX
7,62
5
3
4
.275 MAX
7,00
.040
1,02
.240
6,10
U.S: 858 674 8100
.075
1,91
SUGGESTED PAD LAYOUT
.250
6,35
.100
2,54
.200
5,08
6
2
DATE CODE
1
A
1
B
6
5
3
4
Weight . . . . . . . . . . . . . .0.6 grams
Tape & Reel . . . . . . . . . . . .500/reel
Tube . . . . . . . . . . . . . . . . . .70/tube
Dimensions: Inches
mm
Unless otherwise specified, all tolerances are ± .010
0,25
· U.K: 44 1483 401 700 · France: 33 3 84 35 04 04 · Singapore: 65 287 8998 · Taiwan: 886 2 2698 0228 · http://www.pulseeng.com
PRELIMINARY C200.P (2/00)
WIDEBAND RF TRANSFORMERS
Upstream Transformers for Set-Top Box
and Cable Modem Applications
Application Notes
A. These transformers have been optimized for use in the upstream
interface for cable modems and set-top box applications.
The 5-80 MHz frequency range is well-suited for MCNS-DOCSIS, Euro-DOCSIS/Davic/DVB product development.
B. Bandwidth specifications are for a 75 W system.
C. Materials used in the products are UL94-V0 recognized.
Products meet the requirements of IEC 695-2-2 (Needle Flame
Test).
Notes from Tables
1. Impedance and turns ratios are specified primary:secondary.
(CT=Center Tap).
2. Bandwidth is referenced to midband loss.
3. The insertion loss of these transformers is verified from -40°C
to +85°C. Insertion loss over this temperature range is less
than 1 dB from 5-80 MHz (relative to midband loss).
4. Return loss performance changes with change in temperature.
C2020 - Typical Insertion Loss
Insertion Loss (dB)
0
1
2
3
4
0.1
1
10
100
500
100
500
Frequency (MHz)
C2022 - Typical Insertion Loss
Insertion Loss (dB)
0
1
2
3
4
0.1
1
10
Frequency (MHz)
For More Information :
UNITED STATES
(Worldwide)
UNITED KINGDOM
(Northern Europe)
FRANCE
(Southern Europe)
SINGAPORE
(Southern Asia)
TAIWAN, R.O.C.
(Northern Asia)
12220 World Trade Drive
San Diego, CA 92128
Quick-Facts: 858 674 9672
http://www.pulseeng.com
TEL: 858 674 8100
FAX: 858 674 8262
1 & 2 Huxley Road
The Surrey Research Park
Guildford, Surrey GU2 5RE
United Kingdom
TEL: 44 1483 401700
FAX: 44 1483 401701
Zone Industrielle
F-39270
Orgelet
France
TEL: 33 3 84 35 04 04
FAX: 33 3 84 25 46 41
150 Kampong Ampat
#07-01/02
KA Centre
Singapore 368324
TEL: 65 287 8998
FAX:65 280 0080
3F-4, No. 81, Sec. 1
HsinTai Wu Road
Hsi-Chih, Taipei Hsien
Taiwan, R.O.C.
Tel: 886 2 2698 0228
FAX: 886 2 2698 0948
DISTRIBUTOR
Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product
names mentioned herein may be trademarks or registered trademarks of their respective owners.
Printed on recycled paper. ©2000, Pulse Engineering, Inc.
PRELIMINARY C200.P (2/00)