filter capacitors employ a unique, patented low inductance design featuring two balanced capacitors
that are immune to temperature, voltage and aging performance differences.
These components offer superior decoupling and EMI filtering performance, virtually eliminate parasitics,
and can replace multiple capacitors and inductors saving board space and reducing assembly costs.
A
DVANTAGES
•
•
•
•
•
One device for EMI suppression or decoupling
Replace up to 7 components with one X2Y
Differential and common mode attenuation
Matched capacitance line to ground, both lines
Low inductance due to cancellation effect
A
PPLICATIONS
•
•
•
•
•
Amplifier FIlter & Decoupling
High Speed Data Filtering
EMC I/O Filtering
FPGA / ASIC / µ-P Decoupling
DDR Memory Decoupling
2000pF 1000pF
3000pF 1500pF
4400pF 2200pF
9400pF 4700pF
.078µF .039µF
.010µF
.015µF
.022µF
.047µF
0.10µF
0.18µF
0.22µF
0.33µF
0.40µF
0.47µF
0.94µF
474
10
10
25
100
<10pF
100pF
220pF
470pF
Circuit 1
(1 Y-Cap.)
Circuit 2
(2 Y-Caps.)
CAP.
CODE
.020µF
.030µF
.044µF
.094µF
0.20µF
0.36µF
0.44µF
0.68µF
0.80µF
<20pF
200pF
440pF
940pF
XRX
100
220
270
330
470
101
221
471
102
152
222
472
103
153
223
393
473
104
184
224
334
404
SIZE
0402 (X07)
NPO
X7R
NPO
50
50
50
50
50
50
50
50
50
50
50
50
50
16
100 100 100 100 100
50
50
50
50
25
25
16
10
6.3
16
10
10
0603 (X14)
X7R
X5R
NPO
100 100 100 100 100 100 100
100 100 100 100 100 100 100
50
50
50
50
25
10
0805 (X15)
X7R
NPO
100 100 100 100 100 100 100 100
1206 (X18
X7R
1210 (X41)
1410 (X44)
1812 (X43)
X7R
X7R
X7R
VOLTAGE
RATINGS
6.3 = 6.3 VDC
10 = 10 VDC
16 = 16 VDC
25 = 25 VDC
50 = 50 VDC
100 = 100 VDC
500 = 500 VDC
100
100 100 100
500
500
500
100 100
100
16
16
100 100
100
16
SEE PART NUMBER LISTING TABLE ON PAGES 7 & 8 Contact factory for part combinations not shown.
Circuit 1 capacitance measured Line-to-Ground (A or B to G) Circuit 2 capacitance measured Power-to-Ground (A + B to G)
Rated voltage is from line to ground in Circuit 1, power to ground in Circuit 2 .
H
OW TO
O
RDER
X2Y
®
F
ILTER
& D
ECOUPLING
C
APACITORS
100
VOLTAGE
6R3 = 6.3 V
100 = 10 V
160 = 16 V
250 = 25 V
500 = 50 V
101 = 100 V
501 = 500 V
P/N written: 100X14W104MV4T
X14
CASE SIZE
X07 = 0402
X14 = 0603
X15 = 0805
X18 = 1206
X41 = 1210
X43 = 1812
X44 = 1410
W
DIELECTRIC
N = NPO
W = X7R
X = X5R
104
CAPACITANCE
(Circuit 1)
1st two digits are
significant; third digit
denotes number of zeros.
102 = 1000 pF = 1 nF
103 = 0.01 µF = 10 nF
104 = 0.10 µF = 100 nF
M
TOLERANCE
M = ± 20%
V
TERMINATION
V = Ni barrier w/
100% Sn Plating
Available on select parts:
F = Polyterm
®
soft polymer termination
T = SnPb
4
T
TAPE MODIFIER
Code
Tape
Reel
E
Embossed
7”
T
Paper
7”
Tape specs. per EIA RS481
MARKING
4 = Unmarked
X2Y® technology patents and registered trademark under license from X2Y ATTENUATORS, LLC
2
www.johanson dielectrics.com
105
2.0µF
20pF
44pF
54pF
66pF
94pF
1.0µF
10pF
22pF
27pF
33pF
47pF
X2Y
®
F
ILTER
& D
ECOUPLING
C
APACITORS
Filtering
Circuit 1 S21
Signal-to-Ground
Signal 1
A
Ground
Signal 2
G1
B
G2
Power
Decoupling
Circuit 2 S21
Power-to-Ground
A
G1
B
Ground
G2
Labeled capacitance values below follow the P/N order code or Y cap value (Circuit 1.)
Effective capacitance measured in Circuit 2 is 200% of the labled Circuit 1 Y cap value.
10.0Ω
10.0Ω
Approximate Impedance (Ω)
1.00Ω
1.00Ω
0.10Ω
0.10Ω
0.01Ω
0.01Ω
E
LECTRICAL
C
HARACTERISTICS
Temperature Coefficient:
Dielectric Strength:
NPO
0±30ppm/°C (-55 to +125°C)
X7R
±15% (-55 to +125°C)
WVDC
≤
100V: 2.5 X WVDC, 25°C, 50mA max.
WVDC = 500V: 1.4 X WVDC, 25°C, 50mA max.
X5R
±15% (-55 to +85°C)
Dissipation Factor:
Insulation Resistance
(Min. @ 25°C, WVDC)
Test Conditions:
Other:
0.1% max.
WVDC
≥
50 VDC: 2.5% max.
WVDC = 25 VDC: 3.5% max.
WVDC = 10-16 VDC: 5.0% max.
WVDC = 6.3 VDC: 10% max.
C≤ 0.047µF: 1000
ΩF
or 100 GΩ, whichever is less
C> 0.047µF: 500
ΩF
or 10 GΩ, whichever is less
WVDC
≥
50 VDC: 5% max.
WVDC
≤
25 VDC: 10% max.
C > 100 pF; 1kHz ±50Hz; 1.0±0.2 VRMS
C
≤
100 pF; 1Mhz ±50kHz; 1.0±0.2 VRMS
1.0kHz±50Hz @ 1.0±0.2 Vrms
See main catalog page 18 for additional dielectric specifications.
Equivalent Circuits
A
Cross-sectional View
G
A
B
G
Dimensional View
CB
EB
T
L
G1
G2
W
B
M
ECHANICAL
C
HARACTERISTICS
0402 (X07)
IN
mm
1.143 ±
0.076
0.635 ±
0.076
0.508
max
0.203 ±
0.076
0.305 ±
0.076
0603 (X14)
IN
0.064 ±
0.005
0.035 ±
0.005
0.026
max
0.010 ±
0.006
0.018 ±
0.004
mm
1.626 ±
0.127
0.889 ±
0.127
0.660
max
0.254 ±
0.152
0.457 ±
0.102
0805 (X15)
IN
0.080 ±
0.008
0.050 ±
0.008
0.040
max
0.012 ±
0.008
0.022 ±
0.005
mm
2.032 ±
0.203
1.270 ±
0.203
1.016
max
0.305 ±
0.203
0.559 ±
0.127
1206 (X18)
IN
0.124 ±
0.010
0.063 ±
0.010
0.050
max
0.016 ±
0.010
0.040 ±
0.005
mm
3.150 ±
0.254
1.600 ±
0.254
1.270
max
0.406 ±
0.254
1.016 ±
0.127
1210 (X41)
IN
0.125 ±
0.010
0.098 ±
0.010
0.070
max
0.018 ±
0.010
0.045 ±
0.005
mm
3.175 ±
0.254
2.489 ±
0.254
1.778
max
0.457 ±
0.254
1.143 ±
0.127
1410 (X44)
IN
0.140 ±
0.010
0.098 ±
0.010
0.070
max
0.018 ±
0.010
0.045 ±
0.005
mm
3.556 ±
0.254
2.490 ±
0.254
1.778
max
0.457 ±
0.254
1.143 ±
0.127
1812 (X43)
IN
0.174 ±
0.010
0.125 ±
0.010
0.090
max
0.022 ±
0.012
0.045 ±
0.005
mm
4.420 ±
0.254
3.175 ±
0.254
2.286
max
0.559 ±
0.305
1.143 ±
0.127
L
W
T
EB
CB
0.045 ±
0.003
0.025 ±
0.003
0.020
max
0.008 ±
0.003
0.012 ±
0.003
www.johanson dielectrics.com
3
Approximate Impedance (Ω)
X2Y
®
F
ILTER
& D
ECOUPLING
C
APACITORS
The X2Y
®
Design - A Balanced, Low ESL, “Capacitor Circuit”
The X2Y
®
capacitor design starts with standard 2 terminal MLC capacitor’s opposing electrode sets, A & B, and adds a third electrode set (G) which surround
each A & B electrode. The result is a higly vesatile three node capacitive circuit containing two tightly matched, low inductance capacitors in a compact, four-
terminal SMT chip.
Signal 1
A
Ground
Signal 2
G1
B
G2
X2Y
®
Circuit 1: Filtering
Circuit 1 connects the X2Y
®
filter capacitor across two signal lines. Common-mode noise is filtered to ground (or
reference) by the two Y-capacitors, A & B. Because X2Y
®
is a balanced circuit that is tightly matched in both
phase and magnitude with respect to ground, common-to-differential mode noise conversion is minimized and
any differential-mode noise is cancelled within the device. The low inductance of the capacitors extends their high
frequency attenuation considerably over discrete MLCs.
Power
A
G1
B
Ground
G2
X2Y
®
Circuit 2: Power Bypass / Decoupling
Circuit 2 connects the A & B capacitors in parallel doubling the total capacitance while reducing the inductance.
X2Y capacitors exhibit up to 1/10th the device inductance and 1/5th the mounted inductance of similar sized MLC
capcitors enabling high-performance bypass networks with far fewer components and vias. Low ESL delivers
improved High Frequency performance into the GHz range.
GSM RFI Attenuation in Audio & Analog
GSM handsets transmit in the 850 and 1850 MHz bands using a TDMA pulse
rate of 217Hz. These signals cause the GSM buzz heard in a wide range of
audio products from headphones to concert hall PA systems or “silent” signal
errors created in medical, industrial process control, and security applications.
Testing was conducted where an 840MHz GSM handset signal was delivered
to the inputs of three different amplifier test circuit configurations shown below
whose outputs were measured on a HF spectrum analyzer.
1) No input filter, 2 discrete MLC 100nF power bypass caps.
C++ 属于面向对象的编程语言，OOP的思想不必多说，特别对于复杂的软件工程来说，利用OOP绝对是事半功倍，相对于传统的C来说； 当然用C来写单片机程序无可厚非，已经延续了一个传统，从大学时学的开始到工作岗位，好多人都是一直用C来做，但是既然Keil支持C++编译， 可以用C++来编写你的代码，可以利用高级语言来结构化，清晰化你的程序，为嘛不用呢！哈哈，个人看法！下面进入正题： C+...[详细]
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