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MC1458CD View Datasheet(PDF) - Motorola => Freescale

Part Name
Description
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MC1458CD Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
MC1458, C
Figure 1. Burst Noise versus Source Resistance
1000
BW = 1.0 Hz to 1.0 kHz
100
Figure 2. RMS Noise versus Source Resistance
100
BW = 1.0 Hz to 1.0 kHz
10
10
1.0
0
10
100
1.0 k
10 k
100 k
RS, SOURCE RESISTANCE ()
1.0 M
0.1
10
100
1.0
10 k
100 k
RS, SOURCE RESISTANCE ()
1.0 M
Figure 3. Output Noise versus Source Resistance
10
AV = 1000
1.0
100
10
0.1
1.0
0
10
100
1.0 k
10 k
100 k
RS, SOURCE RESISTANCE ()
1.0 M
140
120
100
80
60
40
20
0
10
Figure 4. Spectral Noise Density
AV = 10, RS = 100 k
100
1.0 k
10 k
f, FREQUENCY (Hz)
100 k
Figure 5. Burst Noise Test Circuit
100 k
Positive
Threshold
+
Voltage
100 k
X 500
X2
+
1.0 k
100 k
Operational Amplifier
Low Pass Filter
Under Test
1.0 Hz to 1.0 kHz
+
Negative
Threshold
Voltage
To Pass / Fail
Indicator
Unlike conventional peak reading or RMS meters, this system
was especially designed to provide the quick response time
essential to burst (popcorn) noise testing.
The test time employed is 10 sec and the 20 µV peak limit
refers to the operational amplifier input thus eliminating errors
in the closed loop gain factor of the operational amplifier .
MOTOROLA ANALOG IC DEVICE DATA
3
 

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