LM393MX,LM2903MX,LM339MX,LM2901MX
●Circuit
Diagram
Technical Note
V
+
OUTPUT
+
INPUT
-
INPUT
GND
Fig.87 Circuit Diagram (each Comparator)
●Measurement
circuit 1 NULL Method measurement condition
Parameter
Input Offset Voltage
Input Offset Current
Input Bias Current
VF
VF1
VF2
VF3
VF4
VF5
VF6
S1
ON
OFF
OFF
ON
ON
S2
ON
OFF
ON
OFF
ON
S3
ON
ON
ON
LM393/LM339 family
V
+
5 to 30
5
5
5
15
15
GND
0
0
0
0
0
0
EK
VICR
0
0
0
0
0
0
V
+
5 to 30
5
5
5
15
15
V
+
,GND,EK,VICR unit：[V]
LM2903/LM2901 family
GND
0
0
0
0
0
0
EK
VICR
0
0
0
0
0
0
Calculation
1
2
3
-
1.4
-
1.4
-
1.4
-
1.4
-
1.4
-
11.4
-
1.4
-
1.4
-
1.4
-
1.4
-
1.4
-
11.4
Voltage Gain
ON
4
－
Calculation
－
1.Input offset voltage (VIO)
Vio
�½
VF1
1+ Rf /Rs
0.1[μF]
[V]
Rf
50[kΩ]
2.Input offset current (IIO)
Iio
�½
VF2 - VF1
Ri (1+ R f / Rs)
[A]
V ICR
RS
＝
50[Ω]
S1
RK
500[kΩ]
0.1[μF]
+15[V ]
V
+
EK
Ri
＝
10[kΩ]
Ri
＝
10[kΩ]
RS
＝
50[Ω]
S2
3.Input bias current (IIb)
Ib
�½
VF4 - VF3
2× R i (1+ Rf / Rs)
[A]
DUT
S3
RK
500[kΩ]
NULL
1000[pF]
GND
RL
V RL
-15[V ]
V
VF
50[kΩ]
4.Voltage gain (AVD)
AV
�½
20× Log
10× (1+ Rf /Rs)
VF6 - VF5
Fig.88 Measurement Circuit1 (each Comparator)
[dB]
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12/16
2011.06 - Rev.C
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