BU7241G ROHM [Rohm], BU7241G Datasheet - Page 23

• Manufacturer Part Number: BU7241G
• Description: Low Voltage Operation CMOS Operational Amplifiers
• Manufacturer: ROHM [Rohm]

BU7261G,BU7261SG,BU7241G,BU7241SG,BU7262F/FVM,BU7262SF/FVM,BU7242F/FVM,BU7242SF/FVM
BU7461G,BU7461SG,BU7441G,BU7441SG,BU7462F/FVM,BU7462SF/FVM,BU7442F/FVM,BU7442SF/FVM
●Test circuit1 NULL method
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-Calculation-
1. Input Offset Voltage (Vio)
2. Large Signal Voltage Gain (Av)
3. Common-mode Rejection Ratio (CMRR)
4. Power Supply Rejection Ratio (PSRR)
○Input-Output Full Swing BU7261/BU7241 family , BU7262/BU7242 family
○Ground Sense BU7461/BU7441 family , BU7462/BU7442 family
Input Offset Voltage
Large Signal Voltage Gain
Common-mode Rejection Ratio
(Input Common-mode Voltage Range)
Power Supply Rejection Ratio
Input Offset Voltage
Large Signal Voltage Gain
Common-mode Rejection Ratio
(Input Common-mode Voltage Range)
Power Supply Rejection Ratio
VDD,VSS,EK,Vicm Unit : [V]
VDD,VSS,EK,Vicm Unit : [V]
Vicm
Parameter
Parameter
RS ＝ 50[Ω]
RS ＝ 50[Ω]
50[kΩ]
0.015[μF]
Ri=1[MΩ]
Ri=1[MΩ]
SW2
SW1
0.015[μF]
Fig. 185Test circuit 1 (one channel only)
VF1
VF2
VF3
VF4
VF5
VF6
VF7
VF1
VF2
VF3
VF4
VF5
VF6
VF7
VF
VF
VDD
VSS
PSRR
Vio
CMRR
Av
DUT
=
=
20Log
=
=
1+Rf/Rs
VRL
SW3
ON
ON
ON
ON
20Log
ON
ON
ON
ON
20Log
S1
S1
|VF1|
RL
Vo
23/32
2×(1+Rf/Rs)
|VF2-VF3|
1.8×(1+Rf/Rs)
Rf=50[kΩ]
3.8×(1+Rf/Rs)
ON
ON
ON
ON
|VF6-VF7|
0.1[μF]
ON
ON
ON
ON
[V]
S2
S2
|VF4-VF5|
EK
1000[pF]
500[kΩ]
500[kΩ]
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
S3
S3
[dB]
[dB]
[dB]
VDD
VDD
1.8
5.5
1.7
5.5
3
3
3
3
3
3
NULL
-15[V]
15[V]
VSS
VSS
0.01[μF]
0
0
0
0
0
0
0
0
-1.5
-0.5
-2.5
-1.5
-0.9
-1.5
-0.5
-2.5
-1.5
-0.9
EK
EK
VF
Technical Note
2009.05 - Rev.A
Vicm
Vicm Calculation
1.5
1.8
0.9
1.8
3
0
3
0
0
0
Calculation
1
2
3
4
1
2
3
4