bu7252sfvm ROHM Co. Ltd., bu7252sfvm Datasheet - Page 11

• Manufacturer Part Number: bu7252sfvm
• Description: Comparators Low Voltage Cmos
• Manufacturer: ROHM Co. Ltd.

● Schematic diagram
● Test circuit1 NULL method
－Calculation－
1. Input offset Voltage (Vio)
2. Large signal voltage gain (Av)
3. Common-mode rejection ratio (CMRR)
4. Power supply rejection ratio (PSRR)
VDD,VSS,EK,Vicm, Unit : [V]
Input offset voltage
Large signal voltage gain
Common-mode rejection ratio
(Input common-mode voltage range)
Power supply rejection ratio
Parameter
Vicm
RS ＝ 50[Ω]
RS ＝ 50[Ω]
VF1
VF2
VF3
VF4
VF5
VF6
VF7
VF
50[kΩ]
ON
ON
ON
ON
S1
Ri ＝ 1[MΩ]
Ri ＝ 1[MΩ]
0.1[uF]
0.1[uF]
S1
S2
Fig.2 Test Circuit 1 (one channel only)
ON
ON
ON
ON
S2
Vio =
Fig.1 Simplified schematic
1+Rf/Rs
|VF1|
OFF
OFF
OFF
ON
VSS
S3
VDD
DUT
[V]
VDD
1.8
5.5
3
3
3
11/16
0.47[µF]
VSS
50[kΩ]
Rf
0
0
0
0
S3
RL
EK
500[kΩ]
RK
-0.1
-0.3
-2.7
-0.1
-0.1
EK
500[kΩ]
RK
Vicm
0.3
0.3
0.3
0
3
NULL
Calculation
0.01[µF]
1
2
3
4
+15[V]
-15[V]
VF