BU7230G Datasheet, PDF (16/27 Pages) Rohm – Input Full Swing, Open Drain Output Low Supply Current CMOS Comparators

BU7230G BU7230SG BU7233F BU7233SF
Datasheet
Application Information
NULL Method Conditions for Test Circuit1
Parameter
Input Offset Voltage
Large Signal Voltage Gain
Common-mode Rejection Ratio
(Input Common-mode Voltage Range)
Power Supply Rejection Ratio
- Calculation -
1. Input Offset Voltage (V_IO)
2. Large Signal Voltage Gain (A_V)
3. Common-mode Rejection Ratio (CMRR)
VDD, VSS, E_K, V_ICM Unit:V
V_F SW1 SW2 SW3 VDD VSS E_K V_ICM Calculation
V_F1 ON ON OFF 3
0 -0.1 0.3
1
V_{F2 ON ON ON}
3
-0.3
0
0.3
2
V_F3
-2.7
V_{F4 ON ON OFF 3}
0
0 -0.1
3
V_F5
3
V_F6
ON
1.8
ON OFF
0
-0.1 0.3
4
V_F7
5.5
V_IO =
|V_F1|
1 + R_F/R_S
[V]
Av = 20Log ^{EK × (1+RF/RS)} [dB]
|V_F3 - V_F2|
CMRR = 20Log ^{VICM × (1+RF/RS)}
|V_F5 - V_F4|
[dB]
4. Power Supply Rejection Ratio (PSRR)
PSRR = 20Log ^{VDD × (1+ RF/RS)} [dB]
|V_F7 - V_F6|
SW1
R_S=50Ω
R_I=1MΩ
0.1μF _0.1μF
V_ICM
R_S=50Ω
50kΩ
R_I=1MΩ
SW2
0.47μF
VDD
R_F=50kΩ
500kΩ
E_K
Vo
DUT
VSS
SW3
R_L
V_RL
500kΩ
0.01μF
15V
NULL
-15V
V V_F
Figure 41. Test Circuit 1(One channel only)
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TSZ02201-0RFR1G200440-1-2
25.Dec.2013 Rev.002