HTHA (Z1-Foil)
Vishay Foil Resistors
Ultra High Precision Z1-Foil Technology Chip Resistor for Hybrid
Circuits with Aluminum Wire Bonding for High Temperature
Applications up to +240°C, Long Term Stability of 0.05%,
TCR to ± 1ppm/°C
FEATURES
Temperature coefficient of resistance (TCR):
±1 ppm/°C typical (- 55 °C to + 125 °C, + 25 °C ref.)
±2.5 ppm/°C typical (- 55 °C to + 220 °C, + 25 °C
ref.)
Resistance range: 5 to 125 k(for higher
or lower values, please contact VFR's application
engineering department)
Resistance tolerance: to ± 0.02 %
Connection method: aluminum wire bonding*
Working power: to 150mW at + 220°C
Long term stability: to ± 0.05 % at + 240°C for 2000h, no
power
Load life stability: to 0.05% at + 220°C for 2000h at
working power
Vishay Foil resistors are not restricted to standard values;
specific "as required" values can be supplied at no extra
cost or delivery (e.g. 1K2345 vs. 1K)
INTRODUCTION
Vishay Foil Resistors (VFR) introduces a new line of Ultra
Precision Bulk Metal® Z1-Foil technology: chip resistor for
hybrid circuits with aluminum wire bonding. These new types
of hybrid chips were especially designed for high
temperature applications up to + 240 °C(1) (working power: to
150mW at + 220°C), and include gold plated terminals.
Thermal stabilization time < 1 s (nominal value achieved
The HTHA series is available in any value within the
specified resistance range. VFR's application engineering
department is available to advise and make
recommendations.
within 10 ppm of steady state value)
Electrostatic discharge (ESD) at least to 25 kV
Non inductive, non capacitive design
Rise time: 1 ns effectively no ringing
Current noise: 0.010 µV (RMS)/Volt of applied voltage
(< - 40 dB)
For non-standard technical requirements and special
applications, please contact foil@vishaypg.com.
Voltage coefficient: < 0.1 ppm/V
Non inductive: < 0.08 µH
Non hot spot design
Terminal finish available: gold plated (lead (Pb)-free alloy)
Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishaypg.com
TABLE 1 - TOLERANCE AND TCR VS.
RESISTANCE VALUE (1)(2)
(- 55 °C to + 220 °C, + 25 °C Ref.)
RESISTANCE
TOLERANCE
(%)
TCR Typical
(ppm/°C)
VALUE
()
* For other mounting option: facing down (flip chip) mounted by
electrical conductive-epoxy please contact application engineering
department
100to 125K
50to < 100
25to < 50
10to < 25
5to 10
± 0.02
± 0.05
± 0.1
± 2.5
± 0.25
± 0.5
FIGURE 1 - POWER DERATING CURVE
Note
-55°C
+70°C
(1)
Performances obtained with ceramic PCB
.
100
75
50
25
0
(2)
For tighter performances or non-standard values up to 150 k,
please contact VFR's application engineering department by
sending an e-mail to the address in the footer below.
+240
-75 -50
-25
0
+25 +50 +75 +100 +125 +150 +175 +200 +225 +250
Ambient Temperature (°C)
Document Number: 63222
Revision: 20-Dec-11
For any questions, contact: foil@vishaypg.com
www.vishayfoilresistors.com
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