CH
Vishay Sfernice
Thin Film Microwave Resistors
FEATURES
• Small size, down to 20 by 16 mils
0402 (P)
• Edged trimmed block resistors
• Pure alumina substrate (99.5%)
02016 (P)
• Various terminations:
• Pre-tinned over Nickel Barrier (wraparound or
fl
ip 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
)
0402 (B)
• 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.
DIMENSIONS
in millimeters [inches]
A
D
D
D
A
D
C
C
B
(C) and (P)
E
(B)
E
DIMENSIONS
CASE SIZE
A
MAX. TOL.
+ 0.1 (0.004)
MIN. TOL.
– 0.1 (0.004)
0.5 (0.02)
1.00 (0.040)
1.27 (0.050)
1.52 (0.060)
1.91 (0.075)
2.54 (0.100)
3.00 (0.126)
B
MAX. TOL.
+ 0.1 (0.004)
MIN. TOL.
– 0.1 (0.004)
0.4 (0.016)
0.6 (0.023)
1.27 (0.050)
0.75 (0.030)
1.27 (0.050)
1.27 (0.050)
1.60 (0.063)
C
MAX. TOL.
+ 0.1 (0.004)
MIN. TOL.
– 0.1 (0.004)
0.38 (0.015)
0.38 (0.015)
0.38 (0.015)
0.38 (0.015)
0.38 (0.015)
0.38 (0.015)
0.38 (0.015)
D/E
POWER
RATING
Pn
mW
30
50
125
125
200
250
330
LIMITING
ELEMENT
VOLTAGE
V
30
37
50
50
50
75
75
ADJUSTABLE
0.15 (0.006)
0.38 (0.015)
0.38 (0.015)
0.38 (0.015)
0.38 (0.015)
0.38 (0.015)
0.38 (0.015)
02016
0402
0505
0603
0705/0805
1005
1206
ORDERING INFORMATION
CH...
0402
SIZE
02016
0402
0505
0603
0805
1005
1206
50R
OHMIC VALUE
10R to 500R
1%
TOLERANCE
1%
5%
10%
B
TERMINATION
B: Tinned Wraparound
C: Tinned Flip Chip
P: Gold Bonding Pads
As these products are application dedicated, a Special CH number will be issued for each product after evaluation.
www.vishay.com
2
For technical questions, contact sfer@vishay.com
Document Number: 53014
Revision 13-Apr-04
CH
Thin Film Microwave Resistors
TYPICAL HIGH FREQUENCY PERFORMANCE
ELECTRICAL MODEL
Vishay Sfernice
C
Lc
R
L
Lc
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 X
L
/R
1 + j R/X
C
with X
L
= 2πfL: Reactance of the
internal inductance
The resistor is purely resistive when R = (L/C)
1/2
= Z
O
. 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.
θ
= Arc tg
X
L
(X
C
+ X
L
) + R
2
with Xc= I/2πfC: Reactance of the
R X
C
internal capacitance
1/2
[Z]= R
1 + (X
L
/R)
2
1 + (R/X
C
)
2
f = frequency
INTERNAL IMPEDANCE CURVE FOR 02016 SIZE (R017 BARE CHIPS)
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
10Ω
C = 0.01pF
L = 0.1nH
25Ω
IZI/R
50Ω
75Ω
100Ω
150Ω
200Ω
250Ω
500Ω
1000Ω
0.2
0
0.1
1
f (GHz)
10
100
Document Number: 53014
Revision 13-Apr-04
For technical questions, contact sfer@vishay.com
www.vishay.com
3
CH
Vishay Sfernice
Thin Film Microwave Resistors
INTERNAL IMPEDANCE CURVE FOR 0402 SIZE (R017 W/A)
2
10Ω
1.8
1.6
1.4
1.2
IZI/R
1
0.8
0.6
0.4
0.2
0
0.1
500Ω
1000Ω
1
f (GHz)
10
100
129Ω
150Ω
200Ω
250Ω
C = 0.03pF
L = 0.5nH
25Ω
50Ω
75Ω
100Ω
INTERNAL IMPEDANCE CURVE FOR 1206 SIZE (R017 W/A)
2
10Ω
1.8
1.6
1.4
1.2
IZI/R
1
0.8
0.6
0.4
0.2
0
0.1
1
f (GHz)
500Ω
1000Ω
10
100
250Ω
200Ω
C = 0.05pF
L = 2nH
25Ω
75Ω
100Ω
150Ω
www.vishay.com
4
For technical questions, contact sfer@vishay.com
Document Number: 53014
Revision 13-Apr-04
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