Multilayer Ceramic Feedthru Chip Capacitors & Arrays

A KYOCERA GROUP COMPANY
AVX
Multilayer Ceramic Feedthru
Chip Capacitors And Arrays
Feedthru 0805/1206 Capacitors
Table of Contents
W2F/W3F Series - 0805 & 1206 Feedthru Chips . . . . . . . . . . . . . . . . . . . . . . . . . . 1
W2H/W3H Series - High Current Feedthru Capacitors . . . . . . . . . . . . . . . . . . . . 5
W3F4/W2F4 Series - 4 Element 1206/0805 Feedthru Array . . . . . . . . . . . . . . . . . 9
W2F/W3F/W3F4 Series - Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
W2H/W3H Series - Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
W2F/W3F/W3F4 Series - Application Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Feedthru 0805/1206 Capacitors
W2F/W3F Series
GENERAL DESCRIPTION
Available in both a standard 0805 and 1206 size, AVX’s line
of feedthru capacitors are ideal choices for EMI
suppression, broadband I/O filtering, or Vcc power line
conditioning. The unique construction of a feedthru
capacitor provides low parallel inductance and offers
excellent decoupling capability for all high di/dt
environments and provides significant noise reduction in
digital circuits to <5 GHz. A large range of capacitor values
are available in either NP0 or X7R ceramic dielectrics. AVX
FeedThru filters are AEC Q200 qualified. High reliability
screening options are available for spacecraft designs.
W2F Series
W3F Series
0805
1206
OUTPUT
SIGNAL LINE - INPUT
CAPACITOR VALUES
GROUND
Part Number
W2F11A 220 8ATxx
W2F11A 470 8ATxx
W2F11A 101 8ATxx
W2F11A 221 8ATxx
W2F11A 471 8ATxx
W2F15C 102 8ATxx
W2F15C 222 8ATxx
W2F15C 472 8ATxx
W2F15C 103 8ATxx
W2F15C 223 8ATxx
W2F15C 473 8ATxx
W3F11A 220 8ATxx
W3F11A 470 8ATxx
W3F11A 101 8ATxx
W3F11A 221 8ATxx
W3F11A 471 8ATxx
W3F15C 102 8ATxx
W3F15C 222 8ATxx
W3F15C 472 8ATxx
W3F15C 103 8ATxx
W3F15C 223 8ATxx*
W3F15C 473 8ATxx
Size
0805
0805
0805
0805
0805
0805
0805
0805
0805
0805
0805
1206
1206
1206
1206
1206
1206
1206
1206
1206
1206
1206
Voltage
100V
100V
100V
100V
100V
50V
50V
50V
50V
50V
50V
100V
100V
100V
100V
100V
50V
50V
50V
50V
50V
50V
Dielectric
NP0
NP0
NP0
NP0
NP0
X7R
X7R
X7R
X7R
X7R
X7R
NP0
NP0
NP0
NP0
NP0
X7R
X7R
X7R
X7R
X7R
X7R
Capacitance
22pF
47pF
100pF
220pF
470pF
1000pF
2200pF
4700pF
10000pF
22000pF
47000pF
22pF
47pF
100pF
220pF
470pF
1000pF
2200pF
4700pF
10000pF
22000pF
47000pF
PERFORMANCE CHARACTERISTICS
NP0
X7R
+50%, -20%
+50%, -20%
100V
50V
300mA
300mA
1000MΩ
1000MΩ
<0.6Ω
<0.6Ω
-55 to +125°C
Capacitance Tolerance
Voltage Rating
Current Rating
Insulation Resistance
DC Resistance
Operating Temperature Range
HOW TO ORDER
W
3
F
1
5
C
223
8
A
T
3
A
Style Size Feedthru Number Voltage** Dielectric Capacitance Capacitance Failure Terminations Packaging Code Quantity Code
2=0805
of
1=100v A=NP0
Code
Tolerance
Rate
T=Plated
(Reel Size)
(Pcs./Reel)
3=1206
Elements 5=50v
C=X7R
8=+50/-20% A=Not
1=7" Reel
F=1,000
Applicable
Embossed Tape
A=2,000,
4=AUTOMOTIVE
3=13" Reel
4,000 or
Embossed Tape
10,000
*AECQ-200 Qualified. Contact factory for other values.
**Note: NP0 available in 100V only and X7R available in 50V only.
1
Feedthru 0805/1206 Capacitors
W2F/W3F Series
Common Ground
Feedthru Pad
L
S
Feedthru Pad
CL
X
BL
T
W
EW
BW
Common Ground
DIMENSIONS
0805 MM
(in.)
1206 MM
(in.)
L
2.01 ± 0.20
(0.079 ± 0.008)
3.20 ± 0.20
(0.126 ± 0.008)
W
1.25 ± 0.20
(0.049 ± 0.008)
1.60 ± 0.20
(0.063 ± 0.008)
T
1.14 Max.
(0.045 Max.)
1.27 Max.
(0.050 Max.)
BW
BL
0.46 ± 0.10
0.18 + 0.25 -0.08
(0.018 ±0.004) (0.007 + 0.010 -0.003)
0.89 ± 0.10
0.18 + 0.25 -0.08
(0.035 ± 0.004) (0.007 + 0.010 -0.003)
EW
0.25 ± 0.13
(0.010 ± 0.005)
0.38 ± 0.18
(0.015 ± 0.007)
X
1.02 ± 0.10
(0.040 ± 0.004)
1.60 ± 0.10
(0.063 ± 0.004)
S
0.23 ± 0.15
(0.009 ± 0.006)
0.46 ± 0.15
(0.018 ± 0.006)
T
P
P
S
C
W
L
RECOMMENDED SOLDER PAD LAYOUT (TYPICAL DIMENSIONS)
0805 MM
(in.)
1206 MM
(in.)
T
3.45
(0.136)
4.54
(0.179)
P
0.51
(0.020)
0.94
(0.037)
S
0.76
(0.030)
1.02
(0.040)
W
1.27
(0.050)
1.65
(0.065)
L
1.02
(0.040)
1.09
(0.043)
C
0.46
(0.018)
0.71
(0.028)
TYPICAL FEEDTHRU CHIP CAP CONNECTION
Physical Layout - A
Feedthru Chip Component Model
Ground
Vcc or
Signal Out
Vcc or
Signal In
Signal Out
Signal In
Ground
Ground
The terminals are connected internally side to side.
Left side and right side are connected and front and
back are connected internally.
For Decoupling, the chip is usually surrounded by
four vias, two for Vcc and two for GND.
For Signal Filtering, the in and out lines need to be
separated on the circuit board.
Physical Layout - B
Ground
Vcc
Vcc
Ground
2
Feedthru 0805/1206 Capacitors
W2F/W3F Series
PERFORMANCE CHARACTERISTICS
S21 0805 – 100V
IMPEDANCE 0805 – 100V
0
10000
-10
1000
-30
-40
-50
-60
-70
1.E+05
W2F11A2208AT
W2F11A4708AT
W2F11A1018AT
W2F11A2218AT
W2F11A4718AT
1.E+06
100
|Z| (Ohms)
S21 (dB)
-20
10
1
0.1
1.E+07
1.E+08
1.E+09
0.01
1.E+05
1.E+10
W2F11A2208
W2F11A4708
W2F11A1018
W2F11A2218
W2F11A4718
1.E+06
Freq (0.3 MHz – 9 GHz)
10000
-10
1000
|Z| (Ohms)
S21 (dB)
-20
-30
-40
-70
1.E+05
W3F11A2208
W3F11A4708
W3F11A1018
W3F11A2218
1.E+06
1.E+08
1.E+10
100
10
1
0.1
1.E+07
1.E+09
IMPEDANCE 1206 – 100V
0
-60
1.E+08
Freq (0.3 MHz – 9 GHz)
S21 1206 – 100V
-50
1.E+07
1.E+09
0.01
1.E+05
1.E+10
W3F11A2208
W3F11A4708
W3F11A1018
W3F11A2218
1.E+06
Freq (0.3 MHz – 9 GHz)
1.E+07
1.E+08
1.E+09
1.E+10
Freq (0.3 MHz – 9 GHz)
IMPEDANCE 1206 – 50V
S21 1206 – 50V
1000
0
-10
100
|Z| (Ohms)
S21 (dB)
-20
-30
-40
-50
-60
-70
1.E+05
W3F15C2228
W3F15C4728
W3F15C1038
W3F15C2238
W3F15C4738
1.E+06
10
1
0.1
1.E+07
1.E+08
Freq (0.3 MHz – 9 GHz)
1.E+09
1.E+10
0.01
1.E+05
W3F15C2228
W3F15C4728
W3F15C1038
W3F15C2238
W3F15C4738
1.E+06
1.E+07
1.E+08
1.E+09
1.E+10
Freq (0.3 MHz – 9 GHz)
3
Feedthru 0805/1206 Capacitors
W2F/W3F Series
PERFORMANCE CHARACTERISTICS
0805 NP0
Current vs. Temperature
Component Temperature (°C)
40.00
220pf
100pf
35.00
47pf
470pf
30.00
25.00
20.00
0.3
0.5
0.7
0.8
1.00
1.20
Current (A)
0805 X7R
Current vs. Temperature
40.00
Component Temperature (°C)
1000pf
4700pf
2200pf
35.00
10nf
22nf
30.00
47nf
25.00
20.00
0.3
0.5
0.7
0.8
1.00
1.20
Current (A)
1206 NP0
Current vs. Temperature
Component Temperature (°C)
40.00
100pf
22pf
47pf
0.00
0.3
0.5
Current (A)
Component Temperature (°C)
40.00
2200pf
20.00
0.75
0.87
Current (A)
4
1000pf
22,000pf
0.5
220pf
0.75
1206 X7R
Current vs. Temperature
0.00
0.3
470pf
20.00
1.00
1.20
0.87
1.00
1.20
High Current Feedthru Capacitors
W2H/W3H Series
GENERAL DESCRIPTION
MECHANICAL CHARACTERISTICS
High current feedthru capacitors are designed as a broadband EMI filter that is specially designed to have high current
handling capability. These SMT feedthru filters offer an
optimized frequency response with high attenuation across
a wide RF spectrum due to optimized parallel and series
inductances. These W2H/W3H feedthru filters can actually
replace discrete L/C filter networks.
• Available in EIA 0805 and 0612 cases
• Plated Tin over Nickel Barrier
• Packaged in Tape & Reel
FEATURES
• Low parallel inductance provides significant noise
reduction in circuits with operating frequencies up to 5GHz
• Broad frequency response with high attenuation
• High rated current – up to 2A for 0805 and up to 5A
for 0612
• Small size – 0805 and 0612 case size
• Reeling in accordance with EIA-481
TYPICAL APPLICATIONS
•
•
•
•
•
High current power (Vcc) lines
PA decoupling
DC:DC converters
Regulators
Power supervisory circuits
HOW TO ORDER
W2H1
5
C
473
8
A
T
1A
Size & Style
W2H1=0805
W3H1=0612
Voltage
3=25v
5=50v
1=100v
Dielectric
A=NP0
C=X7R
Capacitance
Code
Capacitance
Tolerance
8=+50/-20%
M=±20%
Failure
Rate
A=Not
Applicable
Terminations
T=Plated Ni
And Sn
Packaging
1A=7" Reel
4000 pcs
3A=13" Reel
4000 pcs
LEAD-FREE COMPATIBLE
COMPONENT
PINOUT CONFIGURATION
Signal/Vcc
Ground
Signal/Vcc
Signal/Vcc
Ground
Ground
Ground
Signal/Vcc
W2H1 – 0805 Style
W3H1 – 0612 Style
5
High Current Feedthru Capacitors
W2H/W3H Series
ELECTRICAL PARAMETERS
Insulation Resistance
DC Resistance
Operating Temperature
1000 mOhms Minimum
<150 mOhms
-55C to +125C
CAPACITOR VALUES
Part Number
W2H13C 104 8AT
W2H15C 473 8AT
W2H15C 223 8AT
W2H15C 103 8AT
W2H15C 102 8AT
W2H11A 471 8AT
W2H11A 221 8AT
W2H11A 101 8AT
W2H11A 470 8AT
W2H11A 220 8AT
W3H13C 104 8AT
W3H15C 473 8AT
W3H15C 223 8AT
W3H15C 103 8AT
W3H11A 471 8AT
W3H11A 221 8AT
W3H11A 101 8AT
W3H11A 470 8AT
W3H11A 220 8AT
6
Size
0805
0805
0805
0805
0805
0805
0805
0805
0805
0805
0612
0612
0612
0612
0612
0612
0612
0612
0612
Dielectric
X7R
X7R
X7R
X7R
X7R
NP0
NP0
NP0
NP0
NP0
X7R
X7R
X7R
X7R
NP0
NP0
NP0
NP0
NP0
Capacitance
100,000pF
47,000pF
22,000pF
10,000pF
1,000pF
470pF
220pF
100pF
47pF
22pF
100,000pF
47,000pF
22,000pF
10,000pF
470pF
220pF
100pF
47pF
22pF
Tolerance
+50%, -20%
+50%, -20%
+50%, -20%
+50%, -20%
+50%, -20%
+50%, -20%
+50%, -20%
+50%, -20%
+50%, -20%
+50%, -20%
+50%, -20%
+50%, -20%
+50%, -20%
+50%, -20%
+50%, -20%
+50%, -20%
+50%, -20%
+50%, -20%
+50%, -20%
Voltage
25V
50V
50V
50V
50V
100V
100V
100V
100V
100V
25V
50V
50V
50V
100V
100V
100V
100V
100V
Current
2A
2A
1A
1A
1A
0.5A
0.5A
0.5A
0.5A
0.5A
up to 5A
up to 5A
up to 4A
up to 3A
up to 4A
up to 4A
up to 4A
up to 3A
up to 3A
High Current Feedthru Capacitors
W2H/W3H Series
PHYSICAL DIMENSIONS AND PAD LAYOUT
L
T
BW
C
P
X
T
W
S
S
BL
EW
W
L
P
W2H1 – 0805 Style
W
X
BW
P
T
S
W
BL
EW
S
T
C
ES
X
L
L
W3H1 – 0612 Style
PHYSICAL DIMENSIONS
L
W
W2H1– 0805 MM 2.01 ± 0.20
1.25 ± 0.20
(in.) (0.079 ± 0.008) (0.049 ± 0.008)
W3H1– 0612 MM 1.60 ± 0.20
3.20 ± 0.20
(in.) (0.063 ± 0.008) (0.126 ± 0.008)
T
1.14 Max.
(0.045 Max.)
1.22 Max.
(0.048 Max.)
BW
0.46 ± 0.10
(0.018 ±0.004)
2.80 ± .127
(0.110 ± 0.005)
BL
0.18 + 0.25 -0.08
(0.007 + 0.010 -0.003)
0.18 + 0.25 -0.08
(0.007 + 0.010 -0.003)
ES
NA
0.41 ± 0.10
(0.016 ± 0.004)
EW
0.25 ± 0.13
(0.010 ± 0.005)
0.41 ± 0.10
(0.016 ± 0.004)
X
1.02 ± 0.10
(0.040 ± 0.004)
1.60 ± 0.10
(0.063 ± 0.004)
S
0.23 ± 0.05
(0.009 ± 0.002)
1.40 ± 0.07
(0.055 ± 0.003)
PAD DIMENSIONS
W2H1– 0805 MM
(in.)
W3H1– 0612 MM
(in.)
T
3.45
(0.136)
2.54
(0.100)
P
0.51
(0.020)
3.05
(0.120)
S
0.76
(0.030)
1.12
(0.044)
W
1.27
(0.050)
.460
(0.018)
L
1.02
(0.040)
.610
(0.024)
C
0.46
(0.018)
.330
(0.013)
X
NA
.710
(0.028)
7
High Current Feedthru Capacitors
W2H/W3H Series
PERFORMANCE CHARACTERISTICS
IMPEDANCE 0612 – 100V
0
10000
-10
1000
-20
100
|Z| (Ohms)
S21 (dB)
S21 0612 – 100V
-30
-40
-50
-60
1.E+05
W3H11A2208
W3H11A4708
W3H11A1018
W3H11A2218
W3H11A4718
1.E+06
10
1
0.1
1.E+07
1.E+08
1.E+09
1.E+10
0.01
1.E+05
W3H11A2208
W3H11A4708
W3H11A1018
W3H11A2218
W3H11A4718
1.E+06
Freq (0.3 MHz – 9 GHz)
1.E+07
1.E+08
1.E+09
1.E+10
Freq (0.3 MHz – 9 GHz)
S21 0612 – 50V / 25V
IMPEDANCE 0612 – 50V / 25V
100
0
-10
10
|Z| (Ohms)
S21 (dB)
-20
-30
-40
-50
-60
-70
1.E+05
W3H15C1038
W3H15C2238
W3H15C4738
W3H15C1048
1.E+06
0.1
1.E+07
1.E+08
Freq (0.3 MHz – 9 GHz)
8
1
1.E+09
1.E+10
0.01
1.E+05
W3H15C1038
W3H15C2238
W3H15C4738
W3H15C1048
1.E+06
1.E+07
1.E+08
Freq (0.3 MHz – 9 GHz)
1.E+09
1.E+10
Feedthru Filters
— W2F4 / W3F4 Series
EMI Filtering, Broadband Filtering, LCD Filtering
GENERAL DESCRIPTION
W3F4 Series
Available in a 4-Element 0508 and 0612 Feedthru Array package, AVX’s line of Feedthrus
is an ideal choice for EMI suppression, broadband I/O filtering, LCD filtering and Vcc power
line conditioning. The unique construction of the Feedthru capacitor provides low parallel
inductance and offers excellent decoupling capability for all high di/dt environments and
provides significant noise reduction in digital circuits up to 5 GHz. A range of filtering
characteristics is available. The Feedthru Array contains four elements with a common
ground connection, making it an ideal choice for multi-line designs. Additional benefits of
the multi-element array package are reduced placement costs, reduced component
counts and PCB space savings. Feedthru filters can be used to meet IEC, MIL-STD461E, FCC, and SAE radiated and conducted emission requirements.
0612
HOW TO ORDER
W3F4
5
C
221
8
A
T
3A
Size & Style
Voltage
Dielectric
Capacitance
Code
Capacitance
Tolerance
Failure
Rate
Terminations
Packaging
FREQUENCY CHARACTERISTICS
Part Number
Roll Off Frequency
Center Frequency
10 db Point
20 db Range
W3F41A2208AT
270 MHz
2640 MHz
970 MHz
1780 MHz
3500 MHz
W3F41A4708AT
65 MHz
2000 MHz
185 MHz
600 MHz
3400 MHz
W3F41A1018AT
65 MHz
2030 MHz
185 MHz
560 MHz
3500 MHz
W3F45C2218AT
35 MHz
1885 MHz
120 MHz
470 MHz
3300 MHz
W3F45C4718AT
20 MHz
1860 MHz
60 MHz
220 MHz
3500 MHz
W2F43A2208AT
208 MHz
4750 MHz
616 MHz
1407 MHz
7300 MHz
W2F43A4708AT
110 MHz
2750 MHz
330 MHz
900 MHz
4600 MHz
W2F43A1018AT
60 MHz
1300 MHz
179 MHz
501 MHz
7200 MHz
CAPACITOR VALUES & PERFORMANCE CHARACTERISTICS
Part Number
Typical Capacitance
Insulation Resistance
Temperature Characteristics
W3F41A2208AT
22pF
> 1000 M_
NP0
W3F41A4708AT
47pF
> 1000 M_
NP0
W3F41A1018AT
100pF
> 1000 M_
NP0
W3F45C2218AT
220pF
> 1000 M_
X7R
W3F45C4718AT
470pF
> 1000 M_
X7R
W2F43A2208AT
22pF
> 1000 M_
NP0
W2F43A4708AT
47pF
> 1000 M_
NP0
W2F43A1018AT
100pF
> 1000 M_
NP0
CASE SIZE & VOLTAGE RATINGS
Part Number
W3F41A2208AT
W3F41A4708AT
W3F41A1018AT
Case Size
Current Rating
DC Resistance
Voltage Rating
0612
300 mA
< 0.6_
100 V
W3F45C2218AT
W3F45C4718AT
0612
300 mA
< 0.6_
50 V
W2F43A2208AT
W2F43A4708AT
W2F43A1018AT
0508
50 mA
< 3.0_
25 V
9
Feedthru Filters
— W2F4 / W3F4 Series
EMI Filtering, Broadband Filtering, LCD Filtering
W3F41A2208AT S21 Curves
Preliminary
AVX W3F41A2208AT Typical S21
0
-10
dB
-20
-30
-40
1
3
2
4
-50
0.1
1
10
100
1000
10000
FREQUENCY (MHz)
Far Side Crosstalk
1
2
3
4
Preliminary
AVX W3F41A2208AT
Typical Far-side XTALK
Elements 1 - 3
0
0
-10
-10
-20
-20
-30
-30
-40
-40
dB
dB
Preliminary
AVX W3F41A2208AT
Typical Far-side XTALK
Elements 1 - 2
-50
-50
-60
-60
-70
-70
-80
-80
-90
-90
0.1
1
10
100
1000
10000
0.1
1
FREQUENCY (MHz)
1000
10000
1000
10000
Preliminary
AVX W3F41A2208AT
Typical Far-side XTALK
Elements 2 - 3
0
0
-10
-10
-20
-20
-30
-30
-40
-40
dB
dB
100
FREQUENCY (MHz)
Preliminary
AVX W3F41A2208AT
Typical Far-side XTALK
Elements 1 - 4
-50
-50
-60
-60
-70
-70
-80
-80
-90
-90
0.1
1
10
100
FREQUENCY (MHz)
10
10
1000
10000
0.1
1
10
100
FREQUENCY (MHz)
Feedthru Filters
— W2F4 / W3F4 Series
EMI Filtering, Broadband Filtering, LCD Filtering
W3F41A4708AT S21 Curves
Preliminary
AVX W3F41A4708AT Typical S21
0
-10
dB
-20
-30
-40
1
3
2
4
-50
0.1
1
10
100
1000
10000
FREQUENCY (MHz)
Far Side Crosstalk
1
2
3
4
Preliminary
AVX W3F41A4708AT
Typical Far-side XTALK
Elements 1 - 3
0
0
-10
-10
-20
-20
-30
-30
-40
-40
dB
dB
Preliminary
AVX W3F41A4708AT
Typical Far-side XTALK
Elements 1 - 2
-50
-50
-60
-60
-70
-70
-80
-80
-90
0.1
1
10
100
1000
-90
0.1
10000
1
FREQUENCY (MHz)
0
-10
-20
-20
-30
-30
-40
-40
dB
dB
0
-50
-60
-70
-70
-80
-80
100
FREQUENCY (MHz)
10000
1000
10000
-50
-60
10
1000
Preliminary
AVX W3F41A4708AT
Typical Far-side XTALK
Elements 2 - 3
-10
1
100
FREQUENCY (MHz)
Preliminary
AVX W3F41A4708AT
Typical Far-side XTALK
Elements 1 - 4
-90
0.1
10
1000
10000
-90
0.1
1
10
100
FREQUENCY (MHz)
11
Feedthru Filters
— W2F4 / W3F4 Series
EMI Filtering, Broadband Filtering, LCD Filtering
W3F41A1018AT S21 Curves
Preliminary
AVX W3F41A1018AT Typical S21
0
-10
dB
-20
-30
-40
1
3
2
4
-50
0.1
1
10
100
1000
10000
FREQUENCY (MHz)
Far Side Crosstalk
1
2
3
4
Preliminary
AVX W3F41A1018AT
Typical Far-side XTALK
Elements 1 - 3
Preliminary
AVX W3F41A1018AT
Typical Far-side XTALK
Elements 1 - 2
0
0
-10
-10
-20
-20
-30
dB
dB
-30
-40
-50
-40
-50
-60
-60
-70
-70
-80
-80
-90
0.1
1
10
100
1000
-90
0.1
10000
1
FREQUENCY (MHz)
0
-10
-20
-20
-30
-30
-40
-40
dB
dB
0
-50
-60
-70
-70
-80
-80
100
FREQUENCY (MHz)
12
10000
1000
10000
-50
-60
10
1000
Preliminary
AVX W3F41A1018AT
Typical Far-side XTALK
Elements 2 - 3
-10
1
100
FREQUENCY (MHz)
Preliminary
AVX W3F41A1018AT
Typical Far-side XTALK
Elements 1 - 4
-90
0.1
10
1000
10000
-90
0.1
1
10
100
FREQUENCY (MHz)
Feedthru Filters
— W2F4 / W3F4 Series
EMI Filtering, Broadband Filtering, LCD Filtering
W3F45C2218AT S21 Curves
Preliminary
AVX W3F45C2218AT Typical S21
0
-10
dB
-20
-30
-40
1
3
2
4
-50
0.1
1
10
100
1000
10000
FREQUENCY (MHz)
Far Side Crosstalk
1
2
3
4
Preliminary
AVX W3F45C2218AT
Typical Far-side XTALK
Elements 1 - 3
0
-10
-20
-20
-30
-30
-40
-40
-50
-50
-60
-60
-70
-70
-80
-80
-90
0.1
dB
dB
0
-10
1
10
100
1000
-90
0.1
10000
100
Preliminary
AVX W3F45C2218AT
Typical Far-side XTALK
Elements 1 - 4
Preliminary
AVX W3F45C2218AT
Typical Far-side XTALK
Elements 2 - 3
0
0
-10
-20
-20
-30
-30
-40
-40
-50
-60
-70
-70
-80
-80
10
100
FREQUENCY (MHz)
1000
10000
1000
10000
1000
10000
-50
-60
1
10
FREQUENCY (MHz)
-10
-90
0.1
1
FREQUENCY (MHz)
dB
dB
Preliminary
AVX W3F45C2218AT
Typical Far-side XTALK
Elements 1 - 2
-90
0.1
1
10
100
FREQUENCY (MHz)
13
Feedthru Filters
— W2F4 / W3F4 Series
EMI Filtering, Broadband Filtering, LCD Filtering
W3F45C4718AT S21 Curves
Preliminary
AVX W3F45C4718AT Typical S21
0
-10
dB
-20
-30
-40
1
3
2
4
-50
0.1
1
10
100
1000
10000
FREQUENCY (MHz)
Far Side Crosstalk
1
2
3
4
Preliminary
AVX W3F45C4718AT
Typical Far-side XTALK
Elements 1 - 3
0
0
-10
-10
-20
-20
-30
-30
-40
-40
dB
dB
Preliminary
AVX W3F45C4718AT
Typical Far-side XTALK
Elements 1 - 2
-50
-50
-60
-60
-70
-70
-80
-80
-90
0.1
1
10
100
1000
-90
0.1
10000
1
10
100
FREQUENCY (MHz)
FREQUENCY (MHz)
Preliminary
AVX W3F45C4718AT
Typical Far-side XTALK
Elements 1 - 4
Preliminary
AVX W3F45C4718AT
Typical Far-side XTALK
Elements 2 - 3
0
1000
10000
1000
10000
0
-10
-10
-20
-20
-30
-30
dB
dB
-40
-50
-40
-60
-50
-70
-60
-80
-90
0.1
1
10
100
FREQUENCY (MHz)
14
1000
10000
-70
0.1
1
10
100
FREQUENCY (MHz)
Feedthru Filters
— W2F4 / W3F4 Series
EMI Filtering, Broadband Filtering, LCD Filtering
W2F43A2208AT S21 Curves
Preliminary
AVX W2F43A2208AT Typical S21
0
-5
-10
-15
dB (S21)
-20
-25
-30
-35
1
-40
3
2
-45
4
-50
1
10
100
1000
FREQUENCY (MHz)
1
Far Side Crosstalk
3
2
4
Preliminary
AVX W2F43A2208AT
Typical Far-side XTALK
Elements 1 - 3
Preliminary
AVX W2F43A2208AT
Typical Far-side XTALK
Elements 1 - 2
0
0
-10
-20
-20
-40
-30
-60
-80
dB (S21)
dB (S21)
-40
-50
-60
-70
-100
-120
-140
-160
-80
-180
-90
-200
-100
1
10
100
1
1000
10
FREQUENCY (MHz)
1000
FREQUENCY (MHz)
Preliminary
AVX W2F43A2208AT
Typical Far-side XTALK
Elements 2 - 3
Preliminary
AVX W2F43A2208AT
Typical Far-side XTALK
Elements 1 - 4
0
0
-20
-10
-40
-20
-60
-30
-80
-40
-100
-50
dB (S21)
dB (S21)
100
-120
-140
-160
-60
-70
-80
-180
-90
-200
-100
1
10
200
FREQUENCY (MHz)
1000
1
10
200
1000
FREQUENCY (MHz)
15
Feedthru Filters
— W2F4 / W3F4 Series
EMI Filtering, Broadband Filtering, LCD Filtering
W2F43A4708AT S21 Curves
Preliminary
AVX W2F43A4708AT Typical S21
0
-10
dB
-20
-30
1
2
-40
3
4
-50
0.1
1
10
100
1000
10000
FREQUENCY (MHz)
Far Side Crosstalk
1
3
2
0
0
-10
-10
-20
-20
-30
-30
-40
-40
|S21| (dB)
|S21| (dB)
Preliminary
AVX AVX W2F43A4708AT
Typical Far-side XTALK
Elements 1 - 3
Preliminary
AVX W2F43A4708AT
Typical Far-side XTALK
Elements 1 - 2
4
-50
-60
-50
-60
-70
-70
-80
-80
-90
-100
0.01
-90
0.1
1
10
100
1000
10000
-100
0.01
0.1
1
10
FREQUENCY (MHz)
0
-10
-20
-20
-30
-30
-40
-40
|S21| (dB)
|S21| (dB)
0
-10
-50
-60
-70
-80
-90
-90
-100
-100
10
FREQUENCY (MHz)
16
1000
10000
-60
-80
1
10000
-50
-70
0.1
1000
Preliminary
AVX W2F43A4708AT
Typical Far-side XTALK
Elements 2 - 3
Preliminary
AVX W2F43A4708AT
Typical Far-side XTALK
Elements 1 - 4
-110
0.01
100
FREQUENCY (MHz)
100
1000
10000
-110
0.01
0.1
1
10
FREQUENCY (MHz)
100
Feedthru Filters
— W2F4 / W3F4 Series
EMI Filtering, Broadband Filtering, LCD Filtering
W2F43A1018AT S21 Curves
Preliminary
AVX W2F43A1018AT Typical S21
0
-5
-10
-15
dB (S21)
-20
-25
-30
-35
1
-40
2
3
-45
4
-50
1
10
100
1000
FREQUENCY (MHz)
1
2
Far Side Crosstalk
3
4
Preliminary
AVX W2F43A1018AT
Typical Far-side XTALK
Elements 1 - 3
Preliminary
AVX W2F43A1018AT
Typical Far-side XTALK
Elements 1 - 2
0
0
-10
-20
-20
-40
-30
-60
-80
dB (S21)
dB (S21)
-40
-50
-60
-70
-100
-120
-140
-80
-160
-90
-180
-200
-100
1
10
100
1
1000
10
FREQUENCY (MHz)
1000
Preliminary
AVX W2F43A1018AT
Typical Far-side XTALK
Elements 2 - 3
Preliminary
AVX W2F43A1018AT
Typical Far-side XTALK
Elements 1 - 4
0
0
-20
-10
-40
-20
-60
-30
-80
-40
-100
-50
dB (S21)
dB (S21)
100
FREQUENCY (MHz)
-120
-140
-160
-60
-70
-80
-180
-90
-200
-100
1
10
200
FREQUENCY (MHz)
1000
1
10
200
1000
FREQUENCY (MHz)
17
Feedthru Filters
— W2F4 / W3F4 Series
EMI Filtering, Broadband Filtering, LCD Filtering
BL
L
W
ES
P
S
X
T
BW
= Feedthru Paths
Center Line
= Common Ground
DIMENSIONS
L
W
T
BW
3.25±0.15
1.60±0.20
1.22 max
(0.128±0.006) (0.063±0.008) (0.048 max)
2.10±0.15
1.30±0.20
1.02 max
(0.083±0.006) (0.051±0.006) (0.040 max)
0.41±0.10
(0.016±0.004)
0.25±0.10
(0.010±0.004)
BL
0.18
(0.007
0.18
(0.007
+0.25
-0.06
+0.010
-0.003)
+0.25
-0.08
+0.010)
-0.003
P
X
0.76 REF.
(0.030 REF.)
0.50 REF.
(0.020 REF.)
millimeters (inches)
S
ES
1.14±0.10
0.38±0.10
0.41±0.10
(0.045±0.004) (0.015±0.004) (0.016±0.004)
0.75±0.10
0.25±0.10
0.25±0.10
(0.030±0.004) (0.010±0.004) (0.010±0.004)
E
D
A
B
C
D
A
F
PAD LAYOUT DIMENSIONS
CASE SIZE
0612
0508
18
A
0.6 (0.024)
0.56 (0.022)
B
1.6 (0.064)
1.32 (0.052)
millimeters (inches)
C
2.2 (0.088)
1.88 (0.074)
D
0.35 (0.014)
0.25 (0.010)
E
0.76 (0.030)
0.50 (0.020)
F
2.6 (0.104)
1.80 (0.071)
Feedthru 0805/1206 Capacitors
W2F/W3F/W3F4 Series
Applications
APPLICATIONS
FEATURES
MARKET SEGMENTS
EMI Suppression
Broadband I/O Filtering
Vcc Line Conditioning
Standard EIA Sizes
Broad Frequency Response
Low ESR
8 mm Tape and Reel
Computers
Automotive
Power Supplies
Multimedia Add-On Cards
Bar Code Scanners and Remote Terminals
PCMCIA Cards
Medical Instrumentation
Test Equipment
Transceivers/Cell Phones
Typical Circuits Requiring
EMI Filtering
THE FOLLOWING APPLICATIONS AND SCHEMATIC DIAGRAMS SHOW WHERE
FEEDTHRU CAPACITORS MIGHT BE USED FOR EMI SUPPRESSION
•
•
•
•
•
Digital to RF Interface Filtering
Voltage Conditioning in RF Amplifiers
Power Decoupling GaAs FET Transistor Preamplifier
Vcc Line Filtering on Frequency Control Circuit
Clock, Data, Control Line High Frequency Decoupling (Frequency Synthesizer)
(SEE APPLICATION NOTES)
DIGITAL TO RF INTERFACE FILTERING
Audio
Digital�
Block
RF�
Block
= Feedthru
19
Feedthru 0805/1206 Capacitors
W2F/W3F Series
VOLTAGE CONDITIONING IN RF AMPLIFIERS
+28V
Q1
R1
D1
C9
RFC1
R4
R6
+28V
RFC7
Q2
C25
C18
RFC2
R2
Z1
RF in
C1
RFC5
Z2
C2
Z6
Z5
C3
C4
C11
C12
T2
C13
Q3
T1
C14
C10
C5
C21
RFC4
RFC3
Filter
Q4
Z3
L1
Z7
Z4
C22
Z8
L2
R3
C6
C7
C8
C16
C15
RFC6
C23
RFC8
+28V
L3
R5
= Feedthru
C26
C20
C24
RF Out
POWER DECOUPLING GaAs FET TRANSISTOR PREAMPLIFIER
C2
S.M. = SILVER MICA
J1
INPUT
1.5pF
TYPICAL
L3
Q1
L4
R2
L2
500 R1
POT
U1
78L05
IN
OUT
GND
C6
0.1
= Feedthru
L6
C8
62
1/4W
200
CHIP
C4
51
1/8W
R3
15
S.M.
S
C1
L1
200
C5
CHIP
D
G
200
CHIP
RFC1
FB
5.6
S.M.
J2
OUTPUT
C3
L5
1N914
+12/14V
14mA
D2
D1
C7
0.1
16V
0.4W
1000
F.T.
Vcc LINE FILTERING ON FREQUENCY CONTROL CIRCUIT
6-6.35 MHz VFO
C87
0.022
C85
C80
82
C81
24pF
C82
82
2
L3
C83
24
C84
50
2N5486
Q25
D25
1N914
R136
1M
U10
R141
78L05
100
C91
Reg
0.022
IN
OUT
GND
2.2μF
C90
R138 16V
+
100k
R137
47k
C86
10
R139
100k
= Feedthru
20
C89
0.022
FB1
Q26
To Bilateral
Mixer
T14
40673
R140
100
VCC
C88
0.022
High Current Feedthru Capacitors
W2H/W3H Series
APPLICATIONS
Vcc Filtering
CONTROL
Dual Power Switch Filtering
W3H15C2238AT1A
3.3V
3VIN
PCMCIA
Card
M
VC121018J390
TransGuard
5VIN
5V
I/O Bus
Controller
PA Filtering
W2H15C1048AT1A
Regulator Filtering
W3H15C4738AT1A
W2H15C1038AT1A
IN
OUT
VC120630D650
TransGuard
RF OUT
21
Feedthru 0805/1206 Capacitors
W2F/W3F/W3F4 Series
EMI REDUCTION THROUGH THE USE OF SMT FEEDTHRU CAPACITORS
ABSTRACT
Today’s high speed, miniaturized semiconductors have
made EMI issues a key design consideration. This paper
briefly defines EMI and illustrates the capability of SMT
feedthru capacitors.
WHAT IS EMI?
The term EMI stands for Electromagnetic Interference and
refers to signals/energy interfering with a circuit or systems
functions.
In an electronic system, two classes of energy are generated
- wanted and unwanted. Both are potential sources of EMI(1).
Wanted signals such as clocks and bus lines could cause
EMI if they were not decoupled, terminated or filtered properly. Unwanted signals (cell phones, police radios, power
supply noise, etc.) could be conducted or radiated into the
circuit due to poor circuit layout, improper decoupling or a
lack of high frequency filtering.
In either type of EMI signal interference, the system could be
rendered useless or put into a state which would cause early
failure of its semiconductors. Even worse, the unwanted
energy could cause an incorrect answer to be generated
from a computer by randomly powering a gate up or down.
From all of this we can gather that EMI is a complex problem, usually with no one solution. EMI interference can be a
random single shot noise (like a SCR firing) or repetitive in
nature (stepper motor or relay noise). The interference can
enter into our designs either by being induced by E/B fields,
or it can be conducted through control lines or a communication bus. EMI can even be self generated by internal components that generate steep risetime waveforms of voltage
or current.
ty and can be processed in the same end user production
methods as standard capacitors. What feedthru capacitors
offer is an optimized frequency response across a wide RF
spectrum due to a modified internal electrode design.
An application comparison between an SMT feedthru and a
discrete capacitor is shown in Figure 1.
Signal Trace
Signal Trace
Signal Trace
Signal Trace
INPUT
OUTPUT
INPUT
OUTPUT
FEEDTHRU FILTER
SMT CAPACITOR
Figure 1. Comparison of Feedthru Capacitors
to Discrete Capacitors
The key difference between the two filtering methods is that
the feedthru has a much lower inductance between the signal line and ground than the capacitor. The difference in
inductances can be in the range of roughly one order magnitude with a feedthru capacitor. This inductance can be
shown in an electrical sense through the model for a feedthru
and a capacitor (Figure 2).
INPUT
OUTPUT
FEEDTHRU FILTER
INPUT
OUTPUT
SMT CAPACITOR
HOW CAN EMI BE CONTROLLED?
EMI is most efficiently controlled by realizing it to be a design
parameter in the earliest stages of the design. This way, the
board layout can be optimized with large power and ground
planes which will be low impedance in nature. The use of
SMT feedthru filters will yield optimal results.
SMT FEEDTHRU CAPACITORS
AVX introduced feedthru capacitors to supply a broadband
EMI filter capacitor for source suppression and receiver noise
reduction.
SMT feedthru capacitors use the same material systems as
standard ceramic capacitors. They exhibit the same reliabili-
(1)Practical Design for Electromagnetic Compatibility edited by Rocco F. Ficchi
Hayden Book Company 1978
22
Figure 2. Comparison of Feedthru Capacitors
to Discrete Capacitors
The feedthru capacitor has a minimized parallel inductance
and an optimal series inductance (which broadens the
frequency response curve). Typical attenuation graphs are
shown in Figure 3A.
These curves demonstrate feedthru capacitors advantage of
a broad frequency response with high attenuation. They also
serve as a comparison to the inductance of even lower
inductance devices (primarily used in extreme decoupling
cases and switch mode power supplies) - see Figure 3B.
Feedthru 0805/1206 Capacitors
W2F/W3F/W3F4 Series
SMT FEEDTHRU CAPACITOR
TERMINOLOGY
W3F15C2228AT High Frequency Analysis
0
-3dB ~ 2.30 MHz
-20
-30
-40
-50
-60
1.E+05
1.E+06
1.E+07
1.E+08
1.E+09
Frequency (Hz)
APPLICATION AND SELECTION OF
SMT FEEDTHRU CAPACITOR FILTERS
30
10
Impedance
S21 (dB)
-10
AVX’s feedthru capacitors have additional technical terminologies relative to standard ceramic capacitors. The reason
for this is due to the series manner in which the feedthru
element is connected to the circuit.
The most important term is DC Resistance. The DC resistance of the feedthru is specified since it causes a minor signal attenuation which designers can calculate by knowing
the maximum resistance of the part.
The maximum current capability of the part is also of interest
to designers since the feedthru may be placed in series with
the voltage line.
IDC
3
Feedthru
1
0612
0.3
1206
0.1
0.03
0.01
0.1
1
10
100
Frequency, MHz
Figure 3B. Comparison of SMT Capacitor
Frequency Response to Feedthru Filters
1000
EMI suppression and receiver noise reduction can be
achieved most effectively with efficient filtering methods.
Attenuations of over 100 dB are achievable depending on
the complexity and size of the filters involved.
However, before filtering is discussed, another EMI reduction
method is noise limiting, using a series element (inductors or
resistors). This method is easy to implement and inexpensive. The problem it poses is that it can only reduce noise by
-3 to -10 dB. Because of that, series element EMI reduction
is primarily used where there is a poor ground.
SMT feedthru filter capacitors can actually replace discrete
L/C filter networks (depending on the frequency response
needed). The SMT filter capacitors should first be chosen for
its specific frequency response. Then the voltage rating,
DCR, and current capability must be evaluated for circuit
suitability. If there is not a match on voltage, current and DC
resistance ratings, the designer must select the closest available frequency response available on parts that will meet the
design’s power spec.
The top 5 applications for SMT feedthru filter capacitors are:
1.
2.
3.
4.
5.
Digital to RF interface filtering.
Control line high frequency decoupling.
Data and clock high frequency decoupling.
Power line high frequency decoupling.
High gain and RF amplifier filtering.
23
AMERICAS
EUROPE
ASIA-PACIFIC
ASIA-KED
(KYOCERA Electronic Devices)
AVX Greenville, SC
AVX Limited, England
Tel: 864-967-2150
Tel: +44-1276-697000
AVX Northwest, WA
AVX S.A.S., France
Tel: 360-699-8746
Tel: +33-1-69-18-46-00
AVX/Kyocera, Asia, Ltd.,
Hong Kong
AVX Midwest, IN
AVX GmbH, Germany
Tel: +852-2363-3303
Tel: 317-861-9184
Tel: +49-0811-95949-0
AVX/Kyocera (S) Pte Ltd.,
Singapore
KED Hong Kong Ltd.
Tel: +852-2305-1080/1223
Tel: +65-6286-7555
AVX Mid/Pacific, CA
AVX SRL, Italy
AVX/Kyocera Yuhan Hoesa,
South Korea
Tel: 408-988-4900
Tel: +39-02-614-571
Tel: +82-2785-6504
AVX Northeast, MA
AVX Czech Republic
Tel: 617-479-0345
Tel: +420-57-57-57-521
AVX/Kyocera HK Ltd.,
Taiwan
KED Hong Kong Ltd.
Shenzen
Tel: +86-755-3398-9600
KED Company Ltd.
Shanghai
Tel: +86-21-3255-1833
KED Hong Kong Ltd.
Beijing
Tel: +86-10-5869-4655
Tel: +886-2-2656-0258
AVX Southwest, CA
AVX/ELCO UK
Tel: 949-859-9509
Tel: +44-1638-675000
AVX/Kyocera (M) Sdn Bhd,
Malaysia
AVX Canada
ELCO Europe GmbH
Tel: +60-4228-1190
Tel: 905-238-3151
Tel: +49-2741-299-0
AVX South America
AVX S.A., Spain
AVX/Kyocera International
Trading Co. Ltd.,
Shanghai
Tel: +55-11-4688-1960
Tel: +34-91-63-97-197
Tel: +86-21-3255 1933
AVX Benelux
AVX/Kyocera Asia Ltd.,
Shenzen
Tel: +65-6509-0328
Tel: +86-755-3336-0615
Kyocera Corporation
Japan
AVX/Kyocera International
Trading Co. Ltd.,
Beijing
Tel: +81-75-604-3449
Tel: +31-187-489-337
KED Taiwan Ltd.
Tel: +886-2-2950-0268
KED Korea Yuhan Hoesa,
South Korea
Tel: +82-2-783-3604/6126
KED (S) Pte Ltd.
Singapore
Tel: +86-10-6588-3528
AVX/Kyocera India
Liaison Office
Tel: +91-80-6450-0715
Contact:
A KYOCERA GROUP COMPANY
http://www.avx.com
S-FTCA0M1012-C