VHD200, VHD144
Vishay Foil Resistors
Bulk Metal
®
Foil Hermetically sealed, Small Package,
Voltage Dividers with TCR Tracking of 0.1 ppm/°C
and Tolerance Match down to 0.001 %
FIGURE 1 - TYPICAL TCR CURVE
+ 150
+ 100
FIGURE 2 - TRIMMING TO VALUES
Δ
R
+ 50
0
- 50
R
(ppm)
Interloop Capacitance
Reduction in Series
Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
- 100
- 150
- 200
- 50
- 55
- 25
0
+ 20
+ 50
+ 75
+ 100
+ 125
± 2 ppm/°C (+ 25 °C Reference)
Mutual Inductance
Reduction due
to Change in
Current Direction
Ambient Temperature (°C)
Note:
Foil shown in
black,
etched spaces in
white
(For more details, see table 1)
FIGURE 3 - VHD200 AND VHD144 STANDARD PRINTING AND DIMENSIONS
in inches (millimeters)
Standard Printing and Dimensions
0.398
(10.11)
Date Code
Model No .
0.095
(2.41)
Match
Tolerance
5K0000
0.01
%
10K000
VISHAY
0746
VHD200
0.430
(10.92)
Schematic
2)
R
1
R
2
1
0.047
(1.19)
0.75
1)
(19.05)
Low Resistance
Value Indicator
1
2
3
0.435
(11.05)
0.370
(9.40)
0.185
(4.70)
0.146
(3.71)
1
2
3
0.1 (2.54)
Notes
1. Lead wires: #22 AWG solder coated copper, 0.75" minimum length.
2. Each resistor contains 1 chip consisting of two resistive elements. Tol: ± 0.020".
FIGURE 2 - POWER DERATING CURVE
VHD144
- 55 °C
100
Percent of Rated Power (%)
+ 70
Percent of Rated Power (%)
- 55 °C
100
VHD200
+ 25
+ 125
75
75
50
50
25
25
0
- 50
0
+ 50
+ 100
+ 150
0
- 50
0
+ 50
+ 100
+ 130
Ambient Temperature (°C)
Ambient Temperature (°C)
www.vishay.com
2
For any questions, contact: foil@vishay.com
Document Number: 63036
Revision: 13-Nov-07
VAISH [ VAISHALI SEMICONDUCTOR ]
