Document Number: 53014
Revision 13-Apr-04
www.vishay.com
2
CH
Vishay Sfernice
For technical questions, contact sfer@vishay.com
Thin Film Microwave Resistors
FEATURES
• Small size, down to 20 by 16 mils
• Edged trimmed block resistors
• Pure alumina substrate (99.5%)
• Various terminations:
• Pre-tinned over Nickel Barrier (wraparound or fl ip chip)
for solder refl ow
• Gold pad for wire (or ribbon) bonding
• Ohmic range: 10R to 500R
• Small internal reactance (LC down to 1 x 10- 24)
• Tolerance 1%, 5%, 10%,
• TCR: 100ppm/°C
Those miniaturized components are designed in such a way that their internal reactance is very small. When correctly
mounted and utilized, they function as almost pure resistors on a very large range of frequency, up to 20GHz.
ORDERING INFORMATION
CH... 0402 50R 1% B
SIZE OHMIC VALUE TOLERANCE TERMINATION
02016 10R to 500R 1% B: Tinned Wraparound
0402 5% C: Tinned Flip Chip
0505 10% P: Gold Bonding Pads
0603
0805
1005
1206
As these products are application dedicated, a Special CH number will be issued for each product after evaluation.
DIMENSIONS in millimeters [inches]
DIMENSIONS
CASE SIZE A B C D / E POWER LIMITING
MAX. TOL. MAX. TOL. MAX. TOL. RATING ELEMENT
+ 0.1 (0.004) + 0.1 (0.004) + 0.1 (0.004) Pn VOLTAGE
MIN. TOL. MIN. TOL. MIN. TOL. ADJUSTABLE mW V
– 0.1 (0.004) – 0.1 (0.004) – 0.1 (0.004)
02016 0.5 (0.02) 0.4 (0.016) 0.38 (0.015) 0.15 (0.006) 30 30
0402 1.00 (0.040) 0.6 (0.023) 0.38 (0.015) 0.38 (0.015) 50 37
0505 1.27 (0.050) 1.27 (0.050) 0.38 (0.015) 0.38 (0.015) 125 50
0603 1.52 (0.060) 0.75 (0.030) 0.38 (0.015) 0.38 (0.015) 125 50
0705/0805 1.91 (0.075) 1.27 (0.050) 0.38 (0.015) 0.38 (0.015) 200 50
1005 2.54 (0.100) 1.27 (0.050) 0.38 (0.015) 0.38 (0.015) 250 75
1206 3.00 (0.126) 1.60 (0.063) 0.38 (0.015) 0.38 (0.015) 330 75
A
A
DD
C
DD
EE
CB
(C) and (P) (B)
02016 (P)
0402 (P)
0402 (B)
www.vishay.com
3
CH
Vishay Sfernice
Document Number: 53014
Revision 13-Apr-04
For technical questions, contact sfer@vishay.com
Thin Film Microwave Resistors
TYPICAL HIGH FREQUENCY PERFORMANCE
ELECTRICAL MODEL
C
RL LcLc
Cg Cg
C: Internal shunt capacitance
L: Internal inductance
R: Resistance
Lc: External connection inductance
Cg: External capacitance to ground
The complex impedance of the chip resistor is given by the
following equations:
Z = R 1 + j XL/R with XL = 2πfL: Reactance of the
1 + j R/XC internal inductance
θ = Arc
tg XL (XC + XL) + R2
with Xc= I/2πfC: Reactance of the
R XC internal capacitance
[Z] = R 1 + (XL/R)2 f = frequency
1 + (R/XC)2
The resistor is purely resistive when R = (L/C)1/2 = ZO. The
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 = 100Ω,
LC = 1 x 10- 24), 0402 (R = 129Ω, LC = 15 x 10- 24) and 1206
(R = 200Ω, LC = 100 x 10- 24).
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.
INTERNAL IMPEDANCE CURVE FOR 02016 SIZE (R017 BARE CHIPS)
2
0.1
f (GHz)
IZI/R
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
110 100
C = 0.01pF
L = 0.1nH
10Ω
25Ω
50Ω
75Ω
100Ω
150Ω
200Ω
250Ω
500Ω
1000Ω
1/2
Document Number: 53014
Revision 13-Apr-04
www.vishay.com
4
CH
Vishay Sfernice
For technical questions, contact sfer@vishay.com
Thin Film Microwave Resistors
INTERNAL IMPEDANCE CURVE FOR 0402 SIZE (R017 W/A)
10Ω
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0.1 110 100
f (GHz)
IZI/R
25Ω
1000Ω
500Ω
250Ω
200Ω
150Ω
129Ω
100Ω
75Ω
50Ω
C = 0.03pF
L = 0.5nH
INTERNAL IMPEDANCE CURVE FOR 1206 SIZE (R017 W/A)
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
00.1 110 100
f (GHz)
IZI/R
C = 0.05pF
L = 2nH
10Ω25Ω75Ω100Ω
150Ω
200Ω
250Ω
500Ω
1000Ω
