BU7242YFVM-C Datasheet, PDF (12/26 Pages) Rohm – Input/Output Full Swing Low Supply Current CMOS Operational Amplifier

BU7242YFVM-C
Datasheet
Application Information
NULL method condition for Test Circuit 1
Parameter
VF
SW1 SW2 SW3 VDD VSS
VDD, VSS, EK, VICM, VRL Unit:V
EK VICM VRL Calculation
Input Offset Voltage
VF1 ON ON OFF 3
0 -1.5 3
-
1
Large Signal Voltage Gain
VF2
ON ON ON
3
-0.5
0
1.5 1.5
2
VF3
-2.5
Common-mode Rejection Ratio
(Input Common-mode Voltage Range)
VF4
ON ON OFF
3
VF5
0
0 -1.5
-
3
3
Power Supply Rejection Ratio
VF6
1.8
ON ON OFF
-0.9
0
0
-
4
VF7
5.5
-2.75
- Calculation -
1. Input Offset Voltage (VIO)
2. Large Signal Voltage Gain (AV)
VIO =
|VF1|
1+RF/RS
[V]
Av = 20Log ^{ΔEK × (1+RF/RS)} [dB]
|VF2-VF3|
3. Common-mode Rejection Ratio (CMRR) CMRR = 20Log ^{ΔVICM × (1+RF/RS)} _[dB]
|VF4 - VF5|
4. Power Supply Rejection Ratio (PSRR)
PSRR ⁼ 20Log ^{ΔVDD × (1+ RF/RS)} [dB]
|VF6 - VF7|
0.1μF
SW1
VDD
RF=50kΩ
500kΩ
RS=50Ω
RI=1MΩ
0.015μF _0.015μF
DUT
EK
VOUT
500kΩ
VICM
RS=50Ω
RI=1MΩ
SW3
RL
1000pF
50kΩ
SW2
VRL
VSS
Figure 30. Test Circuit 1
0.01μF
15V
NULL
-15V
V VF
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TSZ02201-0GLG0G200810-1-2
12.Jul.2016 Rev.001