CH0402-18RJFT Vishay, CH0402-18RJFT Datasheet - Page 4

• Manufacturer Part Number: CH0402-18RJFT
• Description: RESISTOR, 0402, 5%, 18R
• Manufacturer: Vishay

Specifications of CH0402-18RJFT

• Power Rating: 50mW
• Frequency Range: 50GHz
• Resistance: 18ohm
• Resistance Tolerance: ± 5%
• Temperature Coefficient: ± 100ppm/°C
• Operating Temperature Range: -55°C To +155°C
• Voltage Rating: 37V
• Resistor Case: RoHS Compliant

TYPICAL HIGH FREQUENCY PERFORMANCE ELECTRICAL MODEL
Cg
The complex impedance of the chip resistor is given by the
following equations:
INTERNAL IMPEDANCE CURVE FOR 02016 SIZE
Document Number: 53014
Revision: 18-Jun-09
Z = R
θ = Arc tg
[Z] = R
1 + (R/X
1 + (X
Lc
1 + j R/X
1 + j X
X
L
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
(X
0
L
C
0.1
R X
/R)
L
/R
+ X
C
C
)
2
2
C
L
R
) + R
C = 0.01 pF
L = 0.1 nH
1/2
2
C
with X
internal inductance
with Xc = I/2πfC: Reactance of the
internal capacitance
f = Frequency
L
Impedance as a function of frequency for a chip resistor (F and P terminations)
L
= 2πfL: Reactance of the
50 GHz Thin Film Microwave Resistors
For technical questions, contact:
Lc
1
Cg
C: Internal shunt capacitance
R: Resistance
Lc: External connection inductance
Cg: External capacitance to ground
L: Internal inductance
The resistor is purely resistive when R = (L/C)
smaller the LC product the greater the frequency range over
which the resistor looks approximately resistive.
This can be seen on the graphs relevant to
02016 (R = 100 Ω, LC = 1 x 10
0402 (R = 129 Ω, LC = 15 x 10
1206 (R = 200 Ω, LC = 100 x 10
Note
•
The external reactance (Lc and Cg) depends on the PCB material,
the layout and assembly technology. It does affect the HF
performance and needs to be estimated. The external reactance
can be utilized to compensate the internal one.
[e-mail]
10
f (GHz)
10 Ω
-24
-24
-24
),
) and
).
Vishay Sfernice
1000 Ω
100 Ω
150 Ω
200 Ω
250 Ω
500 Ω
25 Ω
50 Ω
75 Ω
www.vishay.com
1/2
100
= Z
o
CH
. The
49