E-Series RF 4:1 Transformer
890 - 960 MHz ETC4-1T-11
M/A-COM, Inc.
North America: Tel. (800) 366-2266 ■Asia/Pacific: Tel. +81 (03) 3226-1671 ■Europe: Tel. +44 (1344) 869 595
Fax (800) 618-8883 Fax +81 (03) 3226-1451 Fax +44 (1344) 300 020
1
Specifications Subject to Change Without Notice.
V3.00
Features
Surface Mount
4:1 Impedance Ratio
CT on Secondary
Description
M/A-COM’s ETC4-1T-11 is a 4:1 RF transformer in a
low-cost, surface mount package. Ideally suited for high
volume cellular and wireless applications. Typical appli-
cations include single to balanced mode conversion and
impedance matching.
Schematic
Specifications @ 25°C
Frequency Range: 890 - 960 MHz
Note: Mean and sigma calculated from average loss at @ (fU- fL)/2 + fL.
Ordering Information
Part No. Packaging
ETC4-1T-11 Tubes
ETC4-1T-11TR Tape & Reel
SM-22
Pin Configuration
Pin No. Function
1 Secondary
2 Secondary CT
3 Secondary dot
4 Primary dot
5 Primary
●
●
●
S 0840 D
Dimensions in ( ) are in mm.
Unless Otherwise Noted: .x = ±0.04 (1.00)
.xx = ±0.02 (0.50)
.xxx = ±0.010 (0.250)
Parameter Maximum Mean (x) Sigma (σ)
Insertion Loss (fL- fU) 1.75 dB 0.22 dB 0.094
Amplitude Unbalance 3.0 dB – –
Phase Unbalance 20° – –
E-Series RF 4:1 Transformer ETC4-1T-11
V3.00
M/A-COM, Inc.
North America: Tel. (800) 366-2266 ■Asia/Pacific: Tel. +81 (03) 3226-1671 ■Europe: Tel. +44 (1344) 869 595
Fax (800) 618-8883 Fax +81 (03) 3226-1451 Fax +44 (1344) 300 020
2Specifications Subject to Change Without Notice.
Typical Performance
Over Extended Bandwidth (30 kHz - 3 GHz)
PHASE UNBALANCE vs FREQUENCYINSERTION LOSS vs FREQUENCY
Note: All measurements performed on Hewlett Packard 8753D Network Analyzer (201 sample points, linear scale) in a 50 ohm coplanar waveguide
environment. Tables created using MDS software.
S-Parameter data available by E-Mail. Send your request to: eurotec@corp.macom.com.
Parameter Absolute Maximum
RF Power 250 mW
DC Current 30 mA
Operating/Storage Temp. -20°C to +85°C
Absolute Maximum Ratings
AMPLITUDE UNBALANCE vs FREQUENCY INPUT IMPEDANCE vs FREQUENCY
A1
B1
–10.0 avgs31 0.0B
–10.0 avgs21 0.0A
B1
A1
0.0 avgpb2 360.0B
0.0 avgpb1 360.0A
30.0 kHz freq 3.0 GHz A
A1
–5.0 avgab 5.0A
30.0 kHz freq 3.0 GHz B
Y–FS= 1.0 avgiprl B
30.0 kHz freq 3.0 GHz A
30.0 kHz freq 3.0 GHz B 30.0 kHz freq 3.0 GHz A
30.0 kHz freq 3.0 GHz B
B1
