CAR (Charcroft Audio Resistor)
Charcroft Foil Resistors
Ultra High Precision, High Resolution Z-Foil Audio Resistor,
with TCR of ± 0.2 ppm/°C,Tolerance to ± 0.01 %
and Noise < - 40 dB
F E AT U R E S
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Temperature coefficient of resistance (TCR):
- 55°C to + 125°C, 25°C ref.
± 0.2 ppm/°C typical (see table 1)
•
Tolerance: to ± 0.01 %
•
Load life stability: to ± 0.01 % at 70°C, 2000 h at rated power
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Resistance range: 10Ω to 100 kΩ (higher or lower values of
resistance are available)
•
Electrostatic discharge (ESD) above 25 000 V
•
Any value at any tolerance available within resistance range
Rated power: to 0.4 W at + 70°C
•
Non inductive, non capacitive design
•
Rise time: 1 ns without ringing
•
Current noise: < - 40 dB
INTRODUCTION
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Thermal EMF: 0.05 µV/°C typical
The CAR, composed of Vishay’s Bulk Metal® Z-foil technology,
with improved sound quality, provides a combination of low
noise and low inductance/capacitance, making it unrivalled for
applications requiring low noise and distortion-free properties.
•
Voltage coefficient: < 0.1 ppm/V
•
Low inductance: < 0.08 µH typical
•
Non hot spot design
Terminal Finishes Available:
RoHS Compliant
While the regular foil resistors are already widely acknowledged
as the leading resistors for audio applications, the special “naked
Z-foil resistor” design without case or encapsulation, adds an
additional dimension for reducing signal distortion and increasing
clarity in signal processing.
For non standard requirements such as higher values (using
multiple chips) and tighter tolerances, please contact our
application engineering department.
•
Tin/Lead Alloy
A P P L I C AT I O N S
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•
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High precision amplifiers
High-end speaker system
High-end audio circuit
Transducer
High fidelity audio amplifier
TABLE 1 - RESISTANCE VERSUS TCR (- 55 °C to + 125 °C, + 25 °C Ref.)
RESISTOR
RESISTANCE VALUE
(Ω)
TYPICAL TCR AND MAXIMUM SPREAD
(ppm/°C)
TIGHTEST TOLERANCE
(%)
100 to < 100K
± 0.2 ± 1.8
0.01
50 to < 100
± 0.2 ± 2.8
0.01
10 to < 50
± 0.2 ± 3.8
0.02
CAR
FIGURE 1 - TYPICAL TCR CURVE Z-FOIL
www.charcroft.com
FIGURE 2 - STANDARD DIMENSIONS
Document No: ACC100 Issue: 5 Page: 1 Date: 07/09
