Document Number: 53014
Revision 08-Mar-05
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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 flip chip)
for solder reflow
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% N
SIZE OHMIC VALUE TOLERANCE TERMINATION
02016 10R to 500R 1% F (Flip Chip): SnAg over nickel
0402 5% barrier
0505 10% N: (W/A): SnAg over nickel
0603 barrier
0805 P: Gold Bonding Pads
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
 
02016 (P)
0402 (P)
0402 (B)
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CH
Vishay Sfernice
Document Number: 53014
Revision 08-Mar-05
For technical questions, contact sfer@vishay.com
Thin Film Microwave Resistors
TYPICAL HIGH FREQUENCY PERFORMANCE
ELECTRICAL MODEL
C
R L 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 =100,
LC = 1 x 10- 24), 0402 (R = 129, LC = 15 x 10- 24) and 1206
(R = 200, 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
10
25
50
75
100
150
200
250
500
1000
1/2
Document Number: 53014
Revision 08-Mar-05
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)
10
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
25
1000
500
250
200
150
129
100
75
50
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
102575100
150
200
250
500
1000