TECHNICAL NOTE
General-purpose Operational Amplifier / Comparator
Low Voltage
CMOS Comparator
BU7251G,BU7251SG, BU7231G,BU7231SG,
BU7252F/FVM,BU7252S F/FVM, BU7232F/FVM,BU7232S F/FVM
● Description
CMOS comparator BU7251/BU7231family and
BU7252/BU7232 family are input full swing and
push pull output comparator. These ICs integrate
one op-amp or two independent op-amps and phase
compensation capacitor on a single chip.
The features of these ICs are low operating supply
Voltage that is +1.8V to +5.5V(single supply) and
low supply current, extremely low input bias current.
BU7251 G
High speed
Low pow er
Single
Dual
(BU7251SG:105
)
℃
BU7252 F/FVM
(BU7252S F/FVM:105
)
)
℃
BU7231 G
Single
Dual
(BU7231SG:105
)
℃
BU7232 F/FVM
(BU7232S F/FVM:105
℃
● Features
1) Low operating supply voltage (+1.8[V]~+5.5[V])
2) +1.8 [V]~+5.5[V](single supply)
±0.9[V]~±2.75[V](split supply)
3) Input and Output full swing
4) Push-pull output type
5) High speed operation
(BU7251 family, BU7252 family)
6) Low supply current
7) Internal ESD protection
Human body model (HBM) ±4000[V](Typ.)
8) Wide temperature range
-40[℃]~+85[℃]
(BU7251G,BU7252 family, BU7231G, BU7232 family)
-40[℃]~+105[℃]
(BU7251SG,BU7252S family, BU7231SG,BU7232S family)
(BU7231 family, BU7232 family)
● Pin Assignments
VDD
OUT2
IN2-
1
2
3
4
8
7
6
5
OUT1
VDD
OUT
1
2
3
5
4
IN-
CH1
- +
IN1-
-
ꢀ
VSS
IN+
+
CH2
+ -
IN1+
VSS
IN2+
SSOP5
SOP8
MSOP8
BU7251G
BU7251SG
BU7231G
BU7231SG
BU7252F
BU7252SF
BU7232F
BU7232SF
BU7252FVM
BU7252SFVM
BU7232FVM
BU7232SFVM
2007. October