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Dated : 20/06/2007
SEMTECH ELECTRONICS LTD.
(Subsidiary of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
®
1N4099…1N4135
Noise density, (N D) is specified in microvolts-rms per square-root-hertz.
Actual measurement is performed using a 1KHz to 8KHz frequency
bandpass filter at a constant Zener test current(I ZT) at 25 C ambient
temperature. ND is calculated from the formula.
TRUE
RMS
VOLT
METER
R
LOAD
BATTERY
POWER
SUPPLY
(LOW NOISE
SOURCE)
(-)
A
Vnoise
FILTER
fo=2KHz
sp=1.3KHz
AMPLIFIER
(+)
DC
BLOCKING
CAPACITOR
SHIELDED
TEST
CIRCUIT
Capacitance vs.
VZ Curve
0
10
40
120
Zener voltage
80
160
at -8 volts(VR)
20
100
20
at zero volt
200
200
Ambient Temperature: Ta ( C)
O
0
25
100
150
0
100
200
300
400
500
200
Power Derating Curve
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