1N4099…1N4135
Noise density, (ND) 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.
500
400
300
200
SHIELDED
TEST
CIRCUIT
BATTERY
(-)
(+)
POWER
SUPPLY
(LOW NOISE
SOURCE)
DC
R
BLOCKING
CAPACITOR
LOAD
A
AMPLIFIER
100
0
FILTER
fo=2KHz
sp=1.3KHz
25
200
0
100
150
Vnoise
O
TRUE
RMS
VOLT
METER
Ambient Temperature: Ta ( C)
Power Derating Curve
Capacitance vs. VZ Curve
200
20
100
at zero volt
at -8 volts(VR)
20
10
0
40
80
Zener voltage
120
160
200
SEMTECH ELECTRONICS LTD.
(Subsidiary of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
®
Dated : 20/06/2007
SEMTECH [ SEMTECH CORPORATION ]
