BU7251SFVM-E2 [ROHM]
Low Voltage CMOS Comparator; 低电压CMOS比较器
| 型号： | BU7251SFVM-E2 |
| 厂家： | 
ROHM |
| 描述： | Low Voltage CMOS Comparator |
| 文件： | 总17页 (文件大小：455K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
● Absolute maximum ratings (Ta=25[℃])
Rating
Parameter
Symbol
Unit
BU7251G，BU7252 F/FVM
BU7231G，BU7232 F/FVM
BU7251SG，BU7252S F/FVM
BU7231SG，BU7232S F/FVM
Supply Voltage
＋7
VDD－VSS
(VSS－0.3) to VDD＋0.3
VDD-VSS
Vid
Vicm
Topr
Tstg
V
V
V
℃
℃
℃
Differential Input Voltage (*1)
Input Common-mode voltage range
Operating Temperature
Storage Temperature
Maximum junction Temperature
－40 to＋85
－40 to＋105
－55 to＋125
＋125
Tjmax
Note: Absolute maximum rating item indicates the condition which must not be exceeded.
Application of voltage in excess of absolute maximum rating or use out absoluted maximum rated temperature environment may cause deterioration of characteristics.
(*1) The voltage difference between inverting input and non-inverting input is the differential input voltage.
Then input terminal voltage is set to more then VEE.
● Electrical characteristics
○BU7251 family, BU7252 family (Unless otherwise specified VDD=+3[V], VSS=0[V], Ta=25[℃])
Guaranteed Limit
Temperature
range
BU7251G
BU7252 F/FVM
Unit
Condition
Parameter
Symbol
BU7251SG
BU7252S F/FVM
Min.
-
-
-
0
-
-
-
-
-
1
3
Typ.
1
1
1
-
90
15
-
80
80
2
6
-
-
50
20
0.55
0.25
Max.
11
-
-
3
-
35
50
-
-
-
-
Min.
-
-
-
0
-
-
-
-
-
1
3
Typ.
1
1
1
-
90
35
-
80
80
2
6
-
-
50
20
0.55
0.25
Max.
11
-
-
3
-
65
80
-
-
-
-
Input Offset Voltage (*2)(*4)
Input Offset Current (*2)
Input Bias Current (*2)
Input Common-mode voltage Range
Large Signal Voltage Gain
Supply current(*4)
25℃
25℃
25℃
25℃
25℃
25℃
full range
25℃
25℃
25℃
25℃
25℃
25℃
25℃
25℃
25℃
25℃
－
－
－
Vio
Iio
Ib
Vicm
AV
mV
pA
pA
V
(VDD-VSS)=3[V]
dB
RL=10[kΩ]
RL=∞
IDD
µA
Power supply rejection ratio
Common-mode rejection ratio
Output source current (*3)
Output sink current (*3)
High Level Output Voltage (*4)
Low Level Output Voltage (*4)
Output rise time
－
－
PSRR
CMRR
IOH
dB
dB
mA
mA
V
VDD-0.4
IOL
VSS+0.4
RL=10[kΩ]
RL=10[kΩ]
VOH
VOL
Tr
Tf
TPLH
TPHL
VDD-0.1
-
VDD-0.1
-
-
-
-
-
-
VSS+0.1
-
-
-
-
-
VSS+0.1
V
-
-
-
-
-
-
-
-
ns
ns
µs
µs
CL=15pF 100mV over drive
CL=15pF 100mV over drive
CL=15pF 100mV over drive
CL=15pF 100mV over drive
Output fall time
Propagation delay L to H
Propagation delay H to L
(*2) Abusolute values
(*3) Reference to power dissipation under the high temperature environment and decide the output current.
Continuous short circuit is occurring the degenerate of output current characteristics.
(*4) Full range BU7251,BU7252：Ta=-40[℃] to +85[℃] BU7251S,BU7252S：Ta=-40[℃] to +105[℃]
● Electrical characteristics
○BU7231 family, BU7232 family (Unless otherwise specified VDD=+3[V], VSS=0[V], Ta=25[℃])
Guaranteed limit
Temperature
range
BU7231G
BU7232F/FVM
Unit
Condition
Parameter
Symbol
BU7231SG
BU7232S F/FVM
Min.
Min.
Typ.
Max.
Input Offset Voltage (*5)
Input Offset Current (*5)
Input Bias Current (*5)
Input Common-mode voltage Range
Large Signal Voltage Gain
Supply current
25℃
25℃
25℃
25℃
25℃
25℃
full range
25℃
25℃
25℃
25℃
25℃
25℃
25℃
25℃
25℃
25℃
－
Vio
Iio
Ib
Vicm
AV
-
-
-
0
-
-
-
-
1
1
1
-
90
5
11
-
-
3
-
15
30
-
-
-
-
-
-
-
-
0
-
-
-
-
1
1
1
-
90
10
-
80
80
2
6
-
-
50
20
1.7
0.5
11
-
-
3
-
25
50
-
-
-
-
-
mV
pA
pA
V
－
－
(VDD-VSS)=3[V]
RL=10[kΩ]
dB
RL=∞
IDD
µA
-
Power supply rejection ratio
Common-mode rejection ratio
Output source current (*6)
Output sink current (*6)
High Level Output Voltage (*7)
Low Level Output Voltage (*7)
Output rise time
－
－
PSRR
CMRR
IOH
80
80
2
6
-
dB
dB
mA
mA
V
-
1
3
-
1
3
VDD-0.4
VSS+0.4
RL=10[kΩ]
RL=10[kΩ]
IOL
VOH
VOL
Tr
Tf
TPLH
TPHL
VDD-0.1
VDD-0.1
-
-
-
-
-
-
VSS+0.1
-
-
-
-
-
VSS+0.1
V
50
20
1.7
0.5
-
-
-
-
-
-
-
-
ns
ns
µs
µs
CL=15pF 100mV over drive
CL=15pF 100mV over drive
CL=15pF 100mV over drive
CL=15pF 100mV over drive
Output fall time
Propagation delay L to H
Propagation delay H to L
(*5) Abusolute values
(*6) Reference to power dissipation under the high temperature environment and decide the output current.
Continuous short circuit is occurring the degenerate of output current characteristics.
(*7) Full range BU7231,BU7232：Ta=-40[℃] to +85[℃] BU7231S,BU7232S：Ta=-40[℃] to +105[℃]
2/16
●Example of electrical characteristics
○BU7251 family
BU7251 family
BU7251 family
BU7251 family
60
50
40
30
20
10
0
800
800
600
400
200
0
600
105℃
BU7251G
85℃
BU7251SG
400
25℃
200
0
-40℃
0
50
100
150
0
50
100
150
1
2
3
4
5
6
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [
]
℃
AMBIENT TEMPERATURE [
]
℃
Fig.1
Fig.2
Fig.3
Derating Curve
Derating Curve
Supply Current – Supply Voltage
BU7251 family
BU7251 family
BU7251 family
50
40
30
20
10
0
8
6
4
2
0
6
4
2
0
105℃
25℃
85℃
5.5V
5.5V
3.0V
1.8V
-40℃
3.0V
1.8V
-60
-30
0
30
60
90
℃
120
-60
-30
0
30
60
90
120
1
2
3
4
5
6
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [ ]
℃
AMBIENT TEMPERATURE [
]
Fig.4
Fig.5
Fig.6
Supply Current – Ambient Temperature
Output Voltage High – Supply Voltage
Output Voltage High – Ambient Temperature
(RL=10[kΩ])
(RL=10[kΩ])
BU7251 family
BU7251 family
BU7251 family
10
50
40
30
20
10
0
50
40
30
20
10
0
8
-40℃
6
105℃
25℃
85℃
5.5V
1.8V
4
85℃
105℃
2
0
25℃
3.0V
-40℃
-60
-30
0
30
60
90
120
1
2
3
4
5
6
0.0
0.5
1.0
1.5
2.0
2.5
3.0
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [
]
℃
OUTPUT VOLTAGE [V]
Fig.8
Fig.9
Fig.7
Output Voltage Low – Ambient Temperature
Output Source Current – Supply Voltage
Output Voltage Low – Supply Voltage
(RL=10[kΩ])
(VDD=3[V])
(RL=10[kΩ])
BU7251 family
BU7251 family
BU7251 family
20
5
30
25
4
3
2
1
0
-40℃
15
10
5
25℃
20
5.5V
3.0V
1.8V
5.5V
15
3.0V
85℃
105℃
10
5
1.8V
0
-60
0
-30
0
30
60
90
120
-60
-30
0
30
60
90
120
0.0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT VOLTAGE [V]
AMBIENT TEMPERATURE [
]
AMBIENT TEMPERATURE [
]
℃
℃
Fig.11
Fig.12
Fig.10
Output Sink Current – Output Voltage
Output Sink Current – Ambient Temperature
Output Source Current – Ambient Temperature
(VDD=3[V])
(VOUT=VSS+0.4[V])
(VOUT=VDD-0.4[V])
(*) The above date is ability value of sample, it is not guaranteed. BU7251G：－40[℃] to＋85[℃] BU7251SG：－40[℃] to＋105[℃]
3/16
○BU7251 family
BU7251 family
BU7251 family
BU7251 family
10.0
7.5
10.0
7.5
15
10
5
5.0
5.0
85℃
25℃
105℃
3.0V
1.8V
2.5
2.5
105℃
85℃
0.0
0.0
0
-40℃
5.5V
-40℃
25℃
-2.5
-5.0
-7.5
-10.0
-2.5
-5.0
-7.5
-10.0
-5
-10
-15
1
2
3
4
5
6
-60
-30
0
30
60
90
120
-1
0
1
2
3
4
AMBIENT TEMPERATURE [
]
SUPPLY VOLTAGE [V]
℃
INPUT VOLTAGE [V]
Fig.13
Fig.14
Fig.15
Input Offset Voltage – Supply Voltage
Input Offset Voltage – Ambient Temperature
Input offset voltage – Input Voltage
(Vicm=VDD, Vout=0.1[V])
(Vicm=VDD, Vout=0.1[V])
(VDD=3[V])
BU7251 family
BU7251 family
BU7251 family
160
140
120
100
80
160
120
100
80
60
40
20
0
140
120
25℃
85℃
-40℃
105℃
105℃
85℃
1.8V
3.0V
100
80
-40℃
25℃
5.5V
60
60
60
1
2
3
4
5
6
1
2
3
4
5
6
-60
-30
0
30
90
120
SUPPLY VOLTAGE [V]
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [
]
℃
Fig.16
Fig.17
Fig.18
Large Signal Voltage Gain – Supply Voltage
Large Signal Voltage Gain –
Ambient Temperature
Common Mode rejection Ratio – Supply Voltage
(VDD=3[V])
BU7251 family
BU7251 family
BU7251 family
120
100
2.0
120
100
80
60
40
20
0
5.5V
1.5
80
3.0V
1.8V
1.8V
1.0
60
5.5V
40
20
0
3.0V
0.5
0.0
-60
-30
0
30
60
90
120
-60
-30
0
30
60
90
120
-60
-30
0
30
60
90
120
AMBIENT TEMPERATURE [
]
℃
AMBIENT TEMPERATURE [ ]
℃
AMBIENT TEMPERATURE [
]
℃
Fig.19
Fig.20
Fig.21
Common Mode Rejection Ratio –
Power Supply Rejection –
Ambient Temperature
Propagation Delay L-H –
Ambient Temperature
Ambient Temperature (VDD=3[V])
BU7251 family
0.8
0.6
0.4
0.2
0.0
5.5V
1.8V
3.0V
-60
-30
0
30
60
90
120
AMBIENT TEMPERATURE [
]
℃
Fig.22
Propagation Delay H-L –
Ambient Temperature
(*) The above date is ability value of sample, it is not guaranteed. BU7251G：－40[℃] to＋85[℃] BU7251SG：－40[℃] to＋105[℃]
4/16
○BU7252 family
BU7252 family
BU7252 family
BU7252 family
1000
1000
800
600
400
200
0
150
100
50
800
600
400
200
105℃
BU7252F
BU7252SF
85℃
25℃
BU7252FVM
BU7252SFVM
-40℃
0
0
0
85
105
50
100
150
0
50
100
150
1
2
3
4
5
6
AMBIENT TEMPERATURE [
] .
℃
AMBIENT TEMPERATURE [
] .
℃
SUPPLY VOLTAGE [V]
Fig.1
Fig.2
Fig.3
Derating Curve
Derating Curve
Supply Current – Supply Voltage
BU7252 family
BU7252 family
BU7252 family
150
100
50
8
6
4
2
0
8
6
4
2
0
5.5V
105℃
85℃
5.5V
3.0V
1.8V
3.0V
1.8V
25℃
-40℃
0
-60
-30
0
30
60
90
]
120
1
2
3
4
5
6
-60
-30
0
30
60
90
120
AMBIENT TEMPERATURE [
℃
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [℃]
Fig.5
Fig.6
Fig.4
Output Voltage High – Supply Voltage
Output Voltage High – Ambient Temperature
Supply Curreny – Ambient Temperature
(RL=10[kΩ])
(RL=10[kΩ])
BU7252 family
BU7252 family
BU7252 family
50
40
30
20
10
0
50
40
30
20
10
0
10
8
-40℃
25℃
5.5V
6
4
2
0
105℃
85℃
3.0V
85℃
105℃
1.8V
25℃
-40℃
1
2
3
4
5
6
-60
-30
0
30
60
90
120
0
0.5
1
1.5
2
2.5
3
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [
]
℃
OUTPUT VOLTAGE [V]
Fig.8
Fig.7
Fig.9
Output Voltage Low – Ambient Temperature
Output Voltage Low – Supply Voltage
Output Source Current – Output Voltage
(RL=10[kΩ])
(RL=10[kΩ])
（VDD=3[V])
BU7252 family
BU7252 family
BU7252 family
5
30
20
-40℃
5.5V
25
4
3
2
1
0
25℃
15
10
5
20
5.5V
3.0V
3.0V
15
10
1.8V
85℃
1.8V
105℃
5
0
0
-60
-60
-30
0
30
60
90
120
-30
0
30
60
90
120
0.0
0.5
1.0
1.5
2.0
2.5
3.0
AMBIENT TEMPERATURE [℃]
OUTPUT VOLTAGE [V]
AMBIENTFTEigM.P1E2RATURE [
]
℃
Fig.11
Fig.10
Output Sink Current – Ambient Temperature
Output Sink Current – Output Voltage
Output Source Current –
Ambient Temperature
(VOUT=VSS+0.4[V])
(VDD=3[V])
(*) The above date is ability value of sample, it is not guaranteed. BU7252 F/FVM：－40[℃] to＋85[℃] BU7252S F/FVM：－40[℃] to＋105[℃]
5/16
○BU7252 family
BU7252 family
BU7252 family
BU7252 family
10.0
7.5
10.0
7.5
15
10
5
5.0
5.0
-40℃
25℃
2.5
2.5
25℃
3.0V
5.5V
1.8V
-40℃
85℃
0.0
0.0
0
-2.5
-5.0
-7.5
-10.0
-2.5
-5.0
-7.5
-10.0
-5
105℃
105℃
85℃
-10
-15
-60
-30
0
30
60
90
120
1
2
3
4
5
6
-1
0
1
2
3
4
AMBIENT TEMPERATURE [
]
INPUT VOLTAGE [V]
℃
SUPPLY VOLTAGE[V]
Fig.13
Fig.14
Fig.15
Input Offset Voltage – Supply Voltage
Input Offset Voltage – Ambient Temperature
Input Offset Voltage – Input Voltage
(Vicm=VDD,VOUT=0.1[V])
(Vicm=VDD,VOUT=0.1[V])
(VDD=3[V])
BU7252 family
BU7252 family
BU7252 family
160
140
120
100
80
120
100
80
60
40
20
0
160
140
120
100
80
25℃
105℃
1.8V
105℃
85℃
85℃
-40℃
25℃
3.0V
60
60
5.5V
-40℃
40
40
20
20
1
2
3
4
5
6
-60
-30
0
30
60
90
120
1
2
3
4
5
6
SUPPLY VOLTAGE [V]
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [
]
℃
Fig.17
Fig.18
Fig.16
Large Signal Voltage Gain
Common Mode Rejection Ratio
Large Signal Voltage Gain – Supply Voltage
– Supply Voltage (VDD=3[V])
BU7252 family
BU7252 family
BU7252 family
120
100
80
60
40
20
0
120
2.0
1.5
1.0
0.5
0.0
100
5.5V
80
1.8V
60
5.5V
3.0V
40
20
1.8V
3.0V
0
-60
-30
0
30
60
90
120
-60
-30
0
30
60
90
120
-60
-30
0
30
60
90
120
AMBIENT TEMPERATURE [
]
℃
AMBIENT TEMPERATURE [
]
℃
AMBIENT TEMPERATURE [
]
℃
Fig.19
Fig.20
Fig.21
Common Mode Rejection – Ambient Temperature
Power Supply Rejection Ratio – Ambient
Propagation Delay L-H – Ambient Temperature
(VDD=3[V])
BU7251 family
0.8
0.6
1.8V
0.4
3.0V
0.2
5.5V
0.0
-60
-30
0
30
60
90
120
AMBIENT TEMPERATURE [
]
℃
Fig.22
Propagation Delay H-L – Ambient Temperature
(*) The above date is ability value of sample, it is not guaranteed. BU7252 F/FVM：－40[℃] to＋85[℃] BU7252S F/FVM：－40[℃] to＋105[℃]
6/16
○BU7231 series
BU7231 family
BU7231 family
BU7231 family
20
16
12
8
800
800
600
400
200
0
600
400
200
105℃
BU7231G
BU7231SG
85℃
25℃
4
-40℃
0
0
0
85
1
2
3
4
5
6
50
100
150
0
50
100105
150
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [
]
℃
AMBIENT TEMPERATURE [
]
℃
Fig.1
Fig.3
Fig.2
Derating Curve
Derating Curve
Supply Current – Supply Voltage
BU7231 family
BU7231 family
BU7231 family
12
10
8
6
4
2
0
8
6
4
2
0
105℃
25℃
5.5V
1.8V
85℃
5.5V
3.0V
1.8V
6
-40℃
3.0V
4
2
-60
-30
0
30
60
90
℃
120
-60
-30
0
30
60
90
120
1
2
3
4
5
6
AMBIENT TEMPERATURE [
]
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [
]
℃
Fig.4
Fig.5
Fig.6
Supply Current – Ambient Temperature
Output Voltage – Supply Voltage
Output Voltage High – Ambient Temperature
(RL=10[kΩ])
(RL=10[kΩ])
BU7231 family
BU7231 family
BU7231 family
50
50
40
30
20
10
0
10
40
30
20
10
0
8
-40℃
6
25℃
105℃
85℃
5.5V
1.8V
4
85℃
105℃
25℃
2
0
-40℃
3.0V
-60
-30
0
30
60
90
120
0
2
4
6
8
0
0.5
1
1.5
2
2.5
3
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [
]
℃
OUTPUTFVOigLT.9AGE [V]
Fig.7
Fig.8
Output Source Current – Output Voltage
Output Voltage Low – Supply Voltage
Output Voltage Low – Ambient Temperature
(VDD=3[V])
(RL=10[kΩ])
(RL=10[kΩ])
BU7231 family
BU7231 family
BU7231 family
5
4
3
2
1
0
30
20
15
10
5
25
-40℃
25℃
20
5.5V
3.0V
1.8V
5.5V
3.0V
15
85℃
105℃
10
5
1.8V
0
0
-60
-60
-30
0
30
60
90
120
0.0
0.5
1.0
1.5
2.0
2.5
3.0
-30
0
30
60
90
120
AMBIENT TEMPERATURE [
]
℃
OUTPUT VOLTAGE [V]
AMBIENT TEMPERATURE [
]
℃
Fig.11
Fig.12
Fig.10
Output Sink Current – Output Voltage
Output Sink Current – Ambient Temperature
Output Source Current – Ambient Temperature
(VDD=3[V])
(VOUT=VSS+0.4[V])
(VOUT=VDD-0.4[V])
(*) The above date is ability value of sample, it is not guaranteed. BU7231G：－40[℃] to＋85[℃] BU7231SG：－40[℃] to＋105[℃]
7/16
○BU7231 series
BU7231 family
BU7231 family
BU7231 family
10.0
7.5
5.0
2.5
0.0
10.0
7.5
15
10
5
5.0
3.0V
5.5V
-40℃
2.5
1.8V
105℃
85℃
25℃
0.0
0
105℃
-40℃
25℃
85℃
-2.5
-5.0
-2.5
-5.0
-7.5
-10.0
-5
-10
-15
-7.5
-10.0
1
2
3
4
5
6
-60
-30
0
30
60
90
120
-1
0
1
2
3
4
INPUT VOLTAGE [V]
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [
]
℃
Fig.13
Fig.14
Fig.15
Input Offset Voltage – Supply Voltage
Input Offset Voltage – Ambient Temperature
Input Offset Voltage – Input Voltage
(Vicm=VDD, Vout=0.1[V])
(Vicm=VDD, Vout=0.1[V])
(VDD=3[V])
BU7231 family
BU7231 family
BU7231 family
120
100
80
60
40
20
0
160
160
140
120
100
80
140
85℃
25℃
105℃
-40℃
1.8V
120
105℃
25℃
85℃
100
3.0V
-40℃
80
60
5.5V
60
1
2
3
4
5
6
1
2
3
4
5
6
-60
-30
0
30
60
90
120
SUPPLY VOLTAGE [V]
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [
]
℃
Fig.18
Fig.17
Fig.16
Common Mode Rejection Ratio
Large Signal Voltage Gain
– Ambient Temperature
Large Signal Voltage Gain – Supply Voltage
– Supply Voltage (VDD=3[V])
BU7231 family
BU7231 family
BU7231 family
120
120
100
80
60
40
20
0
5
4
3
2
1
0
100
80
60
40
20
0
5.5V
3.0V
5.5V
1.8V
3.0V
1.8V
-60
-30
0
30
60
90
120
-60
-30
0
30
60
90
120
-60
-30
0
30
60
90
120
AMBIENT TEMPERATURE [
]
℃
AMBIENT TEMPERATURE [
]
℃
AMBIENT TEMPERATURE [ ]
℃
Fig.19
Fig.20
Fig.21
Common Mode Rejection Ratio
Power Supply Rejection Ratio
– Ambient Temperature
Propagation Delay L-H
– Ambient Temperature
– Ambient Temperature (VDD=3[V])
BU7231 family
1.5
1.2
0.9
0.6
0.3
0.0
5.5V
1.8V
3.0V
-60
-30
0
30
60
90
120
AMBIENT TEMPERATURE [
]
℃
Fig.22
Propagation Delay H-L
– Ambient Temperature
(*) The above date is ability value of sample, it is not guaranteed. BU7231G：－40[℃] to＋85[℃] BU7231SG：－40[℃] to＋105[℃]
8/16
○BU7232 family
BU7232 family
BU7232 family
BU7232 family
50
40
30
20
10
0
1000
800
600
400
200
0
1000
800
600
400
200
BU7232F
BU7232SF
105℃
BU7232FVM
BU7232SFVM
85℃
25℃
-40℃
0
0
85
105
100
1
2
3
4
5
6
0
50
150
50
100
150
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [
] .
AMBIENT TEMPERATURE [
]
℃
.
℃
Fig.3
Fig.1
Fig.2
Derating Curve
Supply Current – Supply Voltage
Derating Curve
BU7232 family
BU7232 family
BU7232 family
50
40
30
20
10
0
8
8
6
4
2
0
5.5V
6
4
2
0
105℃
25℃
85℃
5.5V
3.0V
1.5V
3.0V
-40℃
1.8V
-60
-30
0
30
60
90
120
-60
-30
0
30
60
90
120
1
2
3
4
5
6
7
AMBIENT TEMPERATURE [
]
℃
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [
]
℃
Fig.6
Fig.4
Fig.5
Output Voltage – Ambient Temperature
Supply Current – Ambient Temperature
Output Voltage High – Supply Voltage
(RL=10[kΩ])
(RL=10[kΩ])
BU7232 family
BU7232 family
BU7232 family
10
50
50
40
30
20
10
0
8
6
4
2
0
40
-40℃
25℃
105℃
30
5.5V
3.0V
85℃
20
85℃
105℃
10
1.8V
25℃
-40℃
0
-60
-30
0
30
60
90
120
0
0.5
1
1.5
2
2.5
3
1
2
3
4
5
6
7
AMBIENT TEMPERATURE [
]
℃
SUPPLY VOLTAGE [V]
OUTPUT VOLTAGE [V]
Fig.7
Fig.9
Fig.8
Output Voltage Low – Supply Voltage
Output Source Current – Output
Voltage
Output Voltage Low – Ambient temperature
(RL=10[kΩ])
(RL=10[kΩ])
BU7232 family
BU7232 family
BU7232 family
30
5
4
3
2
1
0
20
15
10
5
-40℃
25℃
5.5V
3.0V
20
10
0
5.5V
3.0V
105℃
85℃
1.8V
1.8V
0
-60
-30
0
30
60
90
120
0.0
0.5
1.0
1.5
2.0
2.5
3.0
-60
-30
0
30
60
90
120
AMBIENT TEMPERATURE [
]
OUTPUT VOLTAGE [V]
℃
AMBIENT TEMPERATURE [ ]
℃
Fig.11
Fig.12
Fig.10
Output Sink Current – Output Voltage
Output Sink Current – Ambient
Output Source Current – Ambient Temperature
(VDD=3[V])
(VOUT=VDD-0.4[V])
Temperature (VOUT=VSS+0.4[V])
(*) The above date is ability value of sample, it is not guaranteed. BU7232 F/FVM：－40[℃] to＋85[℃] BU7232S F/FVM：－40[℃] to＋105[℃]
9/16
○BU7232 family
BU7232 family
BU7232 family
BU7232 family
10.0
7.5
10.0
7.5
15
10
5
5.0
5.0
-40℃
105℃
2.5
2.5
3.0V
85℃
1.8V
-40℃
25℃
0.0
-2.5
0.0
0
-2.5
-5.0
-7.5
-10.0
5.5V
85℃
25℃
-5
105℃
-5.0
-10
-15
-7.5
-10.0
1
2
3
4
5
℃
6
-60
-30
0
30
60
90
120
-1
0
1
2
3
4
INPUT VOLTAGE [V]
AMBIENT TEMPERATURE [
]
AMBIENT TEMPERATURE [
]
℃
Fig.13
Fig.14
Fig.15
Input Offset Voltage – Ambient Temperature
Input Offset Voltage – Ambient Temperature
Input Offset Voltage – Input Voltage
(Vicm=VDD, VOUT=0.1[V])
(Vicm=VDD, VOUT=0.1[V])
(VDD=3[V])
BU7232 family
BU7232 family
BU7232 family
160
160
120
100
80
60
40
20
0
140
140
105℃
25℃
120
100
80
120
1.8V
100
-40℃
25℃
85℃
105℃
5.5V
80
3.0V
-40℃
60
60
-60
-30
0
30
60
90
120
1
2
3
4
5
6
1
2
3
4
5
6
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [
]
SUPPLY VOLTAGE [V]
℃
Fig.17
Fig.18
Fig.16
Large Signal Voltage Gain –
Ambient Temperature
Common Mode Rejection Ratio –
Large Signal Voltage Gain – Supply Voltage
Supply Voltage (VDD=3[V])
BU7232 family
BU7232 family
BU7232 family
120
120
100
80
60
40
20
0
5
4
3
2
1
0
100
80
5.5V
5.5V
3.0V
60
40
3.0V
1.8V
20
1.8V
0
-60
-30
0
30
60
90
120
-60
-30
0
30
60
90
120
-60
-30
0
30
60
90
120
AMBIENT TEMPERATURE [
]
℃
AMBIENT TEMPERATURE [ ]
℃
AMBIENT TEMPERATURE [
]
℃
Fig.19
Fig.20
Fig.21
Common Mode Rejection Ratio
Power Supply Rejection Ratio
– Ambient Temperature
Propagation Delay L-H – Ambient temperature
– Ambient Temperature (VDD=3[V])
BU7232 family
1.5
1.2
0.9
0.6
0.3
0.0
5.5V
1.8V
3.0V
-60
-30
0
30
60
90
120
AMBIENT TEMPERATURE [
]
℃
Fig.22
Propagation Delay H-L – Ambient Temperature
(*) The above date is ability value of sample, it is not guaranteed. BU7232 F/FVM：－40[℃] to＋85[℃] BU7232S F/FVM：－40[℃] to＋105[℃]
10/16
● Schematic diagram
Fig.1 Simplified schematic
● Test circuit1 NULL method
VDD,VSS,EK,Vicm, Unit : [V]
Parameter
VF
S1
ON
ON
S2
ON
ON
S3
Calculation
VDD
3
VSS
0
EK
-0.1
-0.3
-2.7
Vicm
0.3
VF1
VF2
VF3
VF4
VF5
VF6
VF7
OFF
ON
1
2
Input offset voltage
3
3
0
0
0
0.3
Large signal voltage gain
0
3
Common-mode rejection ratio
(Input common-mode voltage range)
ON
ON
ON
ON
OFF
OFF
-0.1
-0.1
3
4
1.8
5.5
0.3
Power supply rejection ratio
－Calculation－
1. Input offset Voltage (Vio)
|VF1|
Vio =
[V]
1+Rf/Rs
2. Large signal voltage gain (Av)
3. Common-mode rejection ratio (CMRR)
4. Power supply rejection ratio (PSRR)
0.47[µF]
Rf
S1
0.1[uF]
50[kΩ]
RK
500[kΩ]
500[kΩ]
RK
EK
VDD
0.01[µF]
RS 50[Ω]
＝
+15[V]
Ri 1[MΩ]
＝
Vicm
DUT
NULL
Ri 1[MΩ]
＝
RS 50[Ω]
＝
0.1[uF]
VSS
S3
RL
-15[V]
VF
S2
50[kΩ]
Fig.2 Test Circuit 1 (one channel only)
11/16
●Test circuit2 switch condition
Unit : [V]
SW SW SW SW SW SW SW SW
SW No.
1
2
3
4
5
6
7
8
supply current
OFF ON ON OFF OFF OFF OFF OFF
maximum output voltage RL=10 [kΩ] OFF ON ON ON OFF OFF ON OFF
output current
response time
OFF OFF OFF OFF OFF ON OFF OFF
ON OFF ON OFF ON OFF OFF ON
VDD=3[V]
－
＋
SW1
SW2
SW3
VIN+
SW4
SW5
CL
SW6
SW7
SW8
GND
RL
VIN-
Vo
Fig3. Test circuit2 (one channel only)
VIN
V
IN
[V]
Input Wave
Input Wave
[V]
1.6[V]
1.6[V]
100mVover drive
Vref=1.5[V]
Vref=1.5[V]
1.4[V]
100mV over drive
1.4[V]
t
VOUT
VOUT
[V]
[V]
Output Wave
Output Wave
3[V]
3[V]
1.5[V]
1.5[V]
0[V]
0[V]
t
t
TPHL
TPLH
Fig4. Slew rate
12/16
● Description of electrical characteristics
Described here are the terms of electric characteristics used in this technical note. Items and symbols used are also shown.
Note that item name and symbol and their meaning may differ from those on another manufacture’s document or general document.
1. Absolute maximum ratings
Absolute maximum rating item indicates the condition which must not be exceeded. Application of voltage in excess of absolute
Maximum rating or use out of absolute maximum rated temperature environment may cause deterioration of characteristics.
1.1 Power supply voltage（VDD/VSS）
Indicates the maximum voltage that can be applied between the positive power supply terminal and negative power supply terminal
without deterioration or destruction of characteristics of internal circuit.
1.2
1.3
Differential input voltage （Vid）
Indicates the maximum voltage that can be applied between non-inverting terminal and inverting terminal without deterioration and
destruction of characteristics of IC.
Input common-mode voltage range （Vicm）
Indicates the maximum voltage that can be applied to non-inverting terminal and inverting terminal without deterioration or destruction of
characteristics. Input common-mode voltage range of the maximum ratings not assure normal operation of IC. When normal
operation of IC is desired, the input common-mode voltage of characteristics item must be followed.
1.4
Power dissipation （Pd）
Indicates the power that can be consumed by specified mounted board at the ambient temperature 25℃(normal temperature). As for
package product, Pd is determined by the temperature that can be permitted by IC chip in the package（maximum junction temperature）
and thermal resistance of the package
2. Electrical characteristics item
2.1
Input offset voltage （Vio）
Indicates the voltage difference between non-inverting terminal and inverting terminal. It can be translated into the input voltage
difference required for setting the output voltage at 0 [V]
2.2
2.3
Input offset current （Iio）
Indicates the difference of input bias current between non-inverting terminal and inverting terminal.
Input bias current （Ib）
Indicates the current that flows into or out of the input terminal. It is defined by the average of input bias current at non-inverting terminal
and input bias current at inverting terminal.
2.4
2.5
Input common-mode voltage range （Vicm）
Indicates the input voltage range where IC operates normally.
Large signal voltage gain （AV）
Indicates the amplifying rate (gain) of output voltage against the voltage difference between non-inverting terminal and inverting
terminal.
It is normally the amplifying rate (gain) with reference to DC voltage.
Av = (Output voltage fluctuation) / (Input offset fluctuation)
2.6
2.7
2.8
2.9
Circuit current （ICC）
Indicates the IC current that flows under specified conditions and no-load steady status.
Output sink current （OL）
Indicates the maximum current that can be output under specified output condition (such as output voltage and load condition).
Output saturation voltage, Low level output voltage （VOL）
Indicates the voltage range that can be output under specified load conditions.
Output leakage current, High level output current（I leak）
Indicates the current that flows into IC under specified input and output conditions.
2.10 Response Time （Tre）
The interval between the application of an input and output condition.
2.11 Common-mode rejection ratio （CMRR）
Indicates the ratio of fluctuation of input offset voltage when in-phase input voltage is changed. It is normally the fluctuation of DC.
CMRR ＝（Change of Input common-mode voltage）/（Input offset fluctuation）
2.12 Power supply rejection ratio （PSRR）
Indicates the ratio of fluctuation of input offset voltage when supply voltage is changed. It is normally the fluctuation of DC.
PSRR＝（Change of power supply voltage）/（Input offset fluctuation）
13/16
● Derating curve
Power dissipation (total loss) indicates the power that can be consumed by IC at Ta=25℃(normal temperature).IC is heated
when it consumed power, and the temperature of IC ship becomes higher than ambient temperature. The temperature that
can be accepted by IC chip depends on circuit configuration, manufacturing process, and consumable power is limited. Power
dissipation is determined by the temperature allowed in IC chip (maximum junction temperature) and thermal resistance of
package (heat dissipation capability). The maximum junction temperature is typically equal to the maximum value in the
storage package (heat dissipation capability). The maximum junction temperature is typically equal to the maximum value in
the storage temperature range. Heat generated by consumed power of IC radiates from the mold resin or lead frame of the
package. The parameter which indicates this heat dissipation capability (hardness of heat release) is called thermal
resistance, represented by the symbol θj-a[℃/W]. The temperature of IC inside the package can be estimated by this thermal
resistance. Fig.6 (a) shows the model of thermal resistance of the package. Thermal resistance θja, ambient temperature Ta,
junction temperature Tj, and power dissipation Pd can be calculated by the equation below :
θja ＝ (Tj－Ta) / Pd
[℃/W]
・・・・・ （Ⅰ）
Derating curve in Fig.6 (b) indicates power that can be consumed by IC with reference to ambient temperature. Power that
can be consumed by IC begins to attenuate at certain ambient temperature. This gradient is determined by thermal
resistance θja. Thermal resistance θja depends on chip size, power consumption, package, ambient temperature, package
condition, wind velocity, etc even when the same of package is used. Thermal reduction curve indicates a reference value
measured at a specified condition. Fig7(c)-(f) show a derating curve for an example of BU7251family, BU7252 family, BU7231
family, BU7232 family.
Power dissipation Pd:[W]
Pd(max)
θja = ( Tj Ta ) / Pd
[
℃
/W]
ー
P2
θja2 < θja1
Ambient temperature Ta [
]
℃
θja2
P1
Tj(max)
θja1
50
Chip surface temperature Tj [
]
℃
0
25
75
100
125
150
Power dissipation P [W]
Ambient temperature:Ta[
]
℃
BU7251/BU7231
Tj(max)
(b) Derating curve
(a) Thermal resistance
Fig6. Thermal resistance and power dissipation
800
600
400
200
0
1000
800
BU7252F(*9)
BU7232F(*9)
620[mw]
480[mw]
BU7251G(*8)
540[mw]
600
400
200
0
BU7231G(*8)
BU7252FVM(*10)
BU7232FVM(*10)
85
0
50
100
150
0
50
100
150
85
AMBIENT TEMPERATURE [
]
℃
AMBIENT TEMPERATURE [
]
℃
(d) BU7252F/FVM BU7232F/FVM
(c) BU7251G BU7231G
1000
800
600
400
200
0
800
600
400
200
0
BU7252SF(*9)
BU7232SF(*9)
620[mw]
480[mw]
BU7251SG(*8)
BU7231SG(*8)
540[mw]
BU7252SFVM(*10)
BU7232SFVM(*10)
105
100
105
0
50
150
0
50
100
150
AMBIENT TEMPERATURE [
]
℃
AMBIENT TEMPERATURE [
]
℃
(e) BU7251SG BU7231SG
(f) BU7252S F/FVM BU72432S F/FVM
（*8） （*9） （*10）
Unit
[mW/℃]
5.4
6.2
4.8
When using the unit above Ta=25[℃], subtract the value above per degree[℃]. Permissible dissipation is the value
when FR4 glass epoxy board 70[mm]×70[mm]×1.6[mm] (cooper foil area below 3[％]) is mounted.
Fig7. Derating curve
14/16
● Cautions on use
1) Absolute maximum ratings
Absolute maximum ratings are the values which indicate the limits,
within which the given voltage range can be safely charged to the terminal.
However, it does not guarantee the circuit operation.
2) Applied voltage to the input terminal
For normal circuit operation of voltage comparator, please input voltage for its
input terminal within input common mode voltage VDD+0.3[V].
Then, regardless of power supply voltage,VSS-0.3[V] can be applied to input
terminals without deterioration or destruction of its characteristics.
3) Operating power supply (split power supply/single power supply)
The voltage comparator operates if a given level of voltage is applied between VDD and
VSS. Therefore, the operational amplifier can be operated under single power supply
or split power supply.
4) Power dissipation (pd)
If the IC is used under excessive power dissipation. An increase in the chip temperature will cause
deterioration of the radical characteristics of IC.
For example, reduction of current capability. Take consideration of the effective power dissipation and
thermal design with a sufficient margin. Pd is reference to the provided power dissipation curve.
5) Short circuits between pins and incorrect mounting
Short circuits between pins and incorrect mounting when mounting the IC on a printed circuits board,
take notice of the direction and positioning of the IC.
If IC is mounted erroneously, It may be damaged. Also, when a foreign object is inserted between
output, between output and VDD terminal or VSS terminal which causes short circuit, the IC may be
damaged.
6) Using under strong electromagnetic field
Be careful when using the IC under strong electromagnetic field because it may malfunction.
7) Usage of IC
When stress is applied to the IC through warp of the printed circuit board,
The characteristics may fluctuate due to the piezo effect.
Be careful of the warp of the printed circuit board.
8) Testing IC on the set board
When testing IC on the set board, in cases where the capacitor is connected to the low impedance,
make sure to discharge per fabrication because there is a possibility that IC may be damaged by stress.
When removing IC from the set board, it is essential to cut supply voltage.
As a countermeasure against the static electricity, observe proper grounding during fabrication process
and take due care when carrying and storage it.
9) The IC destruction caused by capacitive load
The transistors in circuits may be damaged when VDD terminal and VSS terminal is shorted with the charged
output terminal capacitor.When IC is used as a operational amplifier or as an application circuit,
where oscillation is not activated by an output capacitor,the output capacitor must be kept below
0.1[μF] in order to prevent the damage mentioned above.
10) Decupling capacitor
Insert the deculing capacitance between VDD and VSS, for stable operation of operational amplifier.
11) Latch up
Be careful of input vltage that exceed the VDD and VSS. When CMOS device have sometimes occur
latch up operation. And protect the IC from abnormaly noise
15/16
● Dimensions
SSOP5
SOP8
MSOP8
● Model number construction
・Specify the product by the model number
when placing an order.
-
B U 7 2 5 2 S F
E 2
・Make sure of the combinations of items.
・Start with the leftmost space without leaving
any empty space between characters.
ROHM
Package type
E2 Embossed tape on reel with pin 1 near far when pulled out
TR Embossed tape on reel with pin 1 near far when pulled out
・BU7251 BU7251S
・BU7231 BU7231S
・BU7252 BU7252S
・BU7232 BU7232S
・G : SSOP5
・F : SOP8
・FVM : MSOP8
Packing specification reference
Packing
Package
Quantity
3000
Embossed carrier tape
specification name
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
SSOP5
SOP8
TR
E2
TR
1Pin
Direction of feed
Reel
2500
3000
Direction of feed
1Pin
Reel
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
MSOP8
Direction of feed
1Pin
Reel
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level
of reliability and the malfunction of which would directly endanger human life (such as medical
instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers
and other safety devices), please be sure to consult with our sales representative in advance.
It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance
of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow
for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in
order to prevent possible accidents that may result in bodily harm or fire caused by component failure. ROHM
cannot be held responsible for any damages arising from the use of the products under conditions out of the
range of the specifications or due to non-compliance with the NOTES specified in this catalog.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact your nearest sales office.
THE AMERICAS / EUPOPE / ASIA / JAPAN
ROHM Customer Support System
Contact us : webmaster@ rohm.co.jp
www.rohm.com
TEL : +81-75-311-2121
FAX : +81-75-315-0172
Copyright © 2007 ROHM CO.,LTD.
21, Saiin Mizosaki-cho, Ukyo-ku, Kyoto 615-8585, Japan
Appendix1-Rev2.0
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