Rohm BU7421SG Ultra low power cmos operational amplifier Datasheet

General-purpose Operational Amplifier / Comparator Series
Ultra Low Power
CMOS Operational Amplifiers
・Input / Output Full Swing type
BU7265G,BU7265SG,BU7271G,BU7271SG
・Input Ground Sense / Output Full Swing type
BU7411G,BU7411SG,BU7421G,BU7421SG
No.10049EAT14
●Description
Ultra Low Power CMOS Op-Amp BU7265/BU7271 family (Input-Output Full Swing)
and BU7411/BU7421 family (ground sense)are monolithic IC.
Supply current is very small (BU7265 family, BU7411 family: 0.35[μA]),and VDD range
is +1.6[V]~+5.5[V] (BU7411 family : single supply),so operable with low voltage.
It’s suitable for applications of portable equipments and battery movements.
Input-Output Full Swing
Ultra Low Power
Single
BU7265G
(BU7265SG:Operation guaranteed up to +105℃)
Low Power
Single
BU7271G
(BU7271SG:Operation guaranteed up to +105℃)
Ground Sense
Ultra Low Power
Single
Low Power
Single
BU7411G
(BU7411SG:Operation guaranteed up to +105℃)
BU7421G
(BU7421SG:Operation guaranteed up to +105℃)
●Features
1) Ultra Low Power
0.35[µA] ：BU7265 family
：BU7411 family
8.5[µA] ：BU7421 family
8.6[µA] ：BU7271 family
2) Operable with low voltage
+1.8[V]~+5.5[V](single supply) ：BU7265 family
：BU7271 family
+1.7[V]~+5.5[V](single supply) ：BU7421 family
+1.6[V]~+5.5[V](single supply) ：BU7411 family
3) Low input bias current 1[pA] (Typ.)
4) Internal ESD protection
Human body model(HBM) ±4000[V](Typ.)
5) Wide temperature range
-40[℃]~+85[℃]
(BU7265G,BU7271G,BU7411G,BU7421G)
-40[℃]~+105[℃]
(BU7265SG,BU7271SG,BU7411SG,BU7421SG)
6) Internal phase compensation
7) High large signal voltage gain
●Pin Assignments
IN+ 1
VSS 2
IN-
5
VDD
4
OUT
+
-
3
SSOP5
BU7265G
BU7265SG
BU7271G
BU7271SG
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© 2010 ROHM Co., Ltd. All rights reserved.
1/17
BU7411G
BU7411SG
BU7421G
BU7421SG
2010.03 - Rev.A
BU7265G,BU7265SG,BU7271G,BU7271SG,
BU7411G,BU7411SG,BU7421G,BU7421SG
Technical Note
●Absolute Maximum Ratings(Ta=25[℃])
Ratings
Parameter
Symbol
Supply Voltage
Differential Input Voltage (*1)
Input Common-mode Voltage Range
Operating Temperature
Storage Temperature
Maximum Junction Temperature
Note:
(*1)
BU7265G,BU7411G
BU7271G,BU7421G
VDD-VSS
Vid
Vicm
Topr
Tstg
Tjmax
Unit
BU7265SG,BU7411SG
BU7271SG,BU7421SG
+7
VDD-VSS
(VSS-0.3)~VDD+0.3
-40~+85
-40~+105
-55~+125
+125
V
V
V
℃
℃
℃
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 deteriorationof characteristics.
The voltage difference between inverting input and non-inverting input is the differential input voltage.
Then input terminal voltage is set to more than VSS.
●Electrical characteristics：Input-Output Full Swing
○BU7265 family, BU7271 family (Unless otherwise specified VDD=+3[V], VSS=0[V])
Guaranteed limit
Parameter
Symbol
BU7265G
BU7265SG
Temperature
Range
BU7271G
BU7271SG
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
Condition
Input
Offset Voltage (*2)
Vio
25℃
-
1
8.5
-
1
8
mV
-
Input
(*2)
Offset Current
Iio
25℃
-
1
-
-
1
-
pA
-
Input
(*2)
Bias Current
Ib
25℃
-
1
-
-
1
-
pA
-
Supply Current (*3)
IDD
25℃
Full range
-
0.35
-
0.9
1.3
-
8.6
-
17
25
µA
RL=∞, AV=0[dB]
VIN=1.5[V]
High Level
Output Voltage
VOH
25℃
VDD-0.1
-
-
VDD-0.1
-
-
V
RL=10[kΩ]
Low Level
Output Voltage
VOL
25℃
-
-
VSS+0.1
-
-
VSS+0.1 V
RL=10[kΩ]
AV
25℃
60
95
-
70
100
-
dB RL=10[kΩ]
Vicm
25℃
0
-
3
0
-
3
V
Common-mode
Rejection Ratio
CMRR
25℃
45
60
-
45
60
-
dB
-
Power Supply
Rejection Ratio
PSRR
25℃
60
80
-
60
80
-
dB
-
Output
Source Current (*4)
IOH
25℃
1
2.4
-
2
4
-
mA VDD-0.4[V]
Output
Sink Current (*4)
IOL
25℃
2
4
-
4
8
-
mA VSS+0.4[V]
Slew Rate
SR
25℃
-
2.4
-
-
50
-
V/ms CL=25[pF]
Gain Bandwidth
Product
FT
25℃
-
4
-
-
90
-
kHz CL=25[pF], AV=40[dB]
θ
25℃
-
60°
-
-
60°
-
CL=25[pF], AV=40[dB]
Large Signal
Voltage Gain
Input Common-mode
Voltage Range
Phase Margin
(*2)
(*3)
(*4)
VSS~VDD
Absolute value
Full range BU7265,BU7271：Ta=-40[℃]~+85[℃] BU7265S,BU7271S：Ta=-40[℃]~+105[℃]
Under the high temperature environment, consider the power dissipation of IC when selecting the output current.
When the terminal short circuits are continuously output, the output current is reduced to climb to the temperature inside IC.
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2/17
2010.03 - Rev.A
BU7265G,BU7265SG,BU7271G,BU7271SG,
BU7411G,BU7411SG,BU7421G,BU7421SG
Technical Note
●Electrical characteristics：Ground Sense
○BU7411 family, BU7421 family(Unless otherwise specified VDD=+3[V], VSS=0[V])
Guaranteed limit
Temperature
BU7411G
BU7421G
Parameter
Symbol
Range
BU7411SG
BU7421SG
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
Condition
Input
Offset Voltage (*5)
Vio
25℃
-
1
8
-
1
6
mV -
Input
Offset Current (*5)
Iio
25℃
-
1
-
-
1
-
pA -
Input
Bias Current(*5)
Ib
25℃
-
1
-
-
1
-
pA -
25℃
-
0.35
0.8
-
8.5
17
Full range
-
-
1.3
-
-
25
-
RL=∞, AV=0[dB]
µA BU7411:VIN=1.0[V]
BU7421:VIN=0.9[V]
Supply Current (*6)
IDD
High Level
Output Voltage
VOH
25℃
VDD-0.1
-
-
VDD-0.1
-
Low Level
Output Voltage
VOL
25℃
-
-
VSS+0.1
-
-
AV
25℃
60
95
-
70
100
-
Vicm
25℃
0
-
2
0
-
1.8
Common-mode
Rejection Ratio
CMRR
25℃
45
60
-
45
60
-
dB -
Power Supply
Rejection Ratio
PSRR
25℃
60
80
-
60
80
-
dB -
Output
(*7)
Source Current
IOH
25℃
1
2.4
-
2
4
-
mA VDD-0.4[V]
Output
Sink Current (*7)
IOL
25℃
2
4
-
4
8
-
mA VSS+0.4[V]
Slew Rate
SR
25℃
-
2.4
-
-
50
-
V/ms CL=25[pF]
Gain Bandwidth
Product
FT
25℃
-
4
-
-
90
-
kHz CL=25[pF], AV=40[dB]
θ
25℃
-
60°
-
-
60°
-
CL=25[pF], AV=40[dB]
Large Signal
Voltage Gain
Input Common-mode
Voltage Range
Phase Margin
(*5)
(*6)
(*7)
V
RL=10[kΩ]
VSS+0.1 V
RL=10[kΩ]
dB RL=10[kΩ]
V
BU7411: VSS~VDD-1.0[V]
BU7421: VSS~VDD-1.2[V]
Absolute value
Full range BU7411,BU7421：Ta=-40[℃]~+85[℃] BU7411S,BU7421S：Ta=-40[℃]~+105[℃]
Under the high temperature environment, consider the power dissipation of IC when selecting the output current.
When the terminal short circuits are continuously output, the output current is reduced to climb to the temperature inside IC.
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
3/17
2010.03 - Rev.A
BU7265G,BU7265SG,BU7271G,BU7271SG,
BU7411G,BU7411SG,BU7421G,BU7421SG
Technical Note
●Example of electrical characteristics
○BU7265 family
BU7265 family
POWER DISSIPATION [mW]
400
200
0
0
85
50
105℃
600
BU7265SG
400
200
0
100
150
0
-40℃
25℃
0.2
150
0
1
2
0.8
5.5V
0.6
0.4
3.0V
4
5
6
Fig.3 Supply Current
– Supply Voltage
BU7265 family
6
105℃
4
85℃
25℃
-40℃
2
3
SUPPLY VOLTAGE [V]
BU7265 family
6
OUTPUT VOLTAGE HIGH [V]
SUPPLY CURRENT [μA]
0.4
Fig.2 Derating curve
BU7265 family
1.8V
85℃
AMBIENT TEMPERATURE [°C]
Fig.1 Derating curve
0.2
0.6
0.0
105
100
50
AMBIENT TEMPERATURE [°C]
1.0
SUPPLY CURRENT [μA]
BU7265G
BU7265 family
0.8
OUTPUT VOLTAGE HIGH [V]
POWER DISSIPATION [mW]
600
BU7265 family
800
800
3.0V
4
5.5V
2
1.8V
0
-30
0
30
60
90
0
120
1
BU7265 family
105℃
85℃
15
10
25℃
5
-40℃
1
2
3
4
6
6
-30
0
30
60
90
120
Fig.5Output Voltage High
– Supply Voltage (RL=10[kΩ])
Fig.6 Output Voltage High
– Ambient Temperature (RL=10[kΩ])
BU7265 family
16
5.5V
12
1.8V
8
3.0V
4
BU7265 family
10
-40℃
25℃
8
6
4
85℃
105℃
2
0
-30
0
30
60
90
120
0
1
2
3
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [°C]
OUTPUT VOLTAGE [V]
Fig.7 Output Voltage Low
– Supply Voltage (RL=10[kΩ])
Fig.8 Output Voltage Low
– Ambient Temperature (RL=10[kΩ])
Fig.9 Output Source Current
– Output Voltage (VDD=3.0[V])
OUTPUT SINK CURRENT [mA]
8
6
5.5V
4
3.0V
2
1.8V
0
-60
BU7265 family
20
-40℃
25℃
15
10
85℃
5
105℃
0
-30
0
30
60
90
120
0
1
2
3
BU7265 family
20
OUTPUT SINK CURRENT [mA]
BU7265 family
10
OUTPUT SOURCE CURRENT [mA]
5
5
AMBIENT TEMPERATURE [°C]
0
-60
0
0
4
20
OUTPUTVOLTAGE
VOLTAGE LOW
V]
OUTPUT
LOW [m
[mV]
OUTPUT VOLTAGE LOW [mV]
20
3
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [°C]
Fig.4 Supply Current
– Ambient Temperature
2
0
-60
OUTPUT SOURCE CURRENT [mA]
0.0
-60
16
12
5.5V
3.0V
8
1.8V
4
0
-60
-30
0
30
60
90
AMBIENT TEMPERATURE [°C]
OUTPUT VOLTAGE [V]
AMBIENT TEMPERATURE [°C]
Fig.10 Output Source Current
– Ambient Temperature
(VOUT=VDD-0.4[V])
Fig.11 Output Sink Current
– Output Voltage (VDD=3[V])
Fig.12 Output Sink Current
– Ambient Temperature
(VOUT=VSS+0.4[V])
(*)The above data is ability value of sample, it is not guaranteed.BU7265G：-40[℃]～+85[℃]
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© 2010 ROHM Co., Ltd. All rights reserved.
4/17
120
BU7265SG：-40[℃]～+105[℃]
2010.03 - Rev.A
BU7265G,BU7265SG,BU7271G,BU7271SG,
BU7411G,BU7411SG,BU7421G,BU7421SG
○BU7265 family
BU7265 family
10.0
BU7265 family
10.0
7.5
0.0
85℃
105℃
-5.0
-7.5
1
2
3
4
5
-2.5
3.0V
6
-7.5
Fig.13 Input Offset Voltage
– Supply Voltage
(Vicm=VDD, VOUT=1.5[V])
BU7265 family
120
100
25℃
-40℃
80
60
0
1
2
3
4
5
80
60
3.0V
40
20
-30
0
30
60
90
120
-1
120
BU7265 family
0
5.5V
120
100
3.0V
1.8V
80
2
3
4
BU7265 family
-40℃
100
25℃
80
105℃
85℃
60
40
20
0
-30
0
30
60
90
0
120
1
2
3
4
6
Fig.18 Common Mode Rejection Ratio
– Supply Voltage
BU7265 family
BU7265 family
6
5
100
80
60
40
4
5.5V
3
2
1
20
3.0V
1.8V
0
-60
5
SUPPLY VOLTAGE [V]
-30
0
30
60
90
0
-60
120
BU7265 family
100
-30
0
30
60
90
120
AMBIENT TEMPERATURE [°C]
Fig.20 Power Supply Rejection Ratio
– Ambient Temperature
BU7265 family
1
120
AMBIENT TEMPERATURE [°C]
Fig.19 Common Mode Rejection Ratio
– Ambient Temperature
Fig.21 Slew Rate L-H
– Ambient Temperature
200
Phase
5
80
150
5.5V
3
2
60
40
100
Gain
3.0V
50
20
1
PHASE [deg]
4
GAIN [dB]
SLEW RATE H-L [V/ms]
90
Fig.15 Input Offset Voltage
– Input Voltage (VDD=3[V])
140
AMBIENT TEMPERATURE [°C]
6
60
120
POWER SUPPLY REJECTION RATIO [dB]
COMMON MODE REJECTION RATIO [dB]
100
0
-60
30
Fig.17 Large Signal Voltage Gain
– Ambient Temperature
BU7265 family
5.5V
1.8V
0
AMBIENT TEMPERATURE [°C]
Fig.16 Large Signal Voltage Gain
– Supply Voltage
105℃
85℃
-10
Fig.14 Input Offset Voltage –
Ambient Temperature
(Vicm=VDD, VOUT=1.5[V])
SUPPLY VOLTAGE [V]
120
-5
INPUT VOLTAGE [V]
60
-60
6
0
-15
-30
160
LARGE SIGNAL VOLTAGE GAIN [dB]
LARGE SIGNAL VOLTAGE GAIN [dB]
105℃
85℃
140
25℃
AMBIENT TEMPERATURE [°C]
SUPPLY VOLTAGE [V]
160
1.8V
-5.0
-10.0
-60
-10.0
0
0.0
-40℃
5
SLEW RATE L-H [V/ms]
-2.5
5.5V
2.5
10
INPUT OFFSET VOLTAGE [mV]
-40℃
2.5
5.0
COMMON MODE REJECTION RATIO [dB]
25℃
BU7265 family
15
7.5
5.0
INPUT OFFSET VOLTAGE [mV]
INPUT OFFSET VOLTAGE [mV]
Technical Note
1.8V
0
-60
-30
0
30
60
90
120
AMBIENT TEMPERATURE [°C]
Fig.22 Slew Rate H-L
– Ambient Temperature
0
0
1.E+00 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06
FREQUENCY [Hz]
Fig.23 Gain – Frequency
(*)The above data is ability value of sample, it is not guaranteed.BU7265G：-40[℃]~+85[℃] BU7265SG：-40[℃]~+105[℃]
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© 2010 ROHM Co., Ltd. All rights reserved.
5/17
2010.03 - Rev.A
BU7265G,BU7265SG,BU7271G,BU7271SG,
BU7411G,BU7411SG,BU7421G,BU7421SG
BU7271 family
600
BU7271G
400
200
0
0
200
150
0
Fig.25 Derating curve
3.0V
8
1.8V
4
0
-60
0
0
30
60
90
105℃
25℃
-40℃
2
120
0
1
2
3
4
1
2
3
4
5
6
Fig.26 Supply Current
– Supply Voltage
85℃
4
-40℃
SUPPLY VOLTAGE [V]
5
BU7271 family
6
5.5V
4
3.0V
1.8V
2
0
-30
0
-60
6
-30
0
30
60
90
120
AMBIENT TEMPERATURE [°C]
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [°C]
Fig.27 Supply Current
– Ambient Temperature
Fig.28 Output Voltage High
– Supply Voltage (RL=10[kΩ])
Fig.29 Output Voltage High
– Ambient Temperature (RL=10[kΩ])
105℃
85℃
8
4
25℃
-40℃
0
0
1
2
3
4
5
BU7271 family
12
5.5V
8
4
3.0V
1.8V
0
-60
6
0
30
60
90
Fig.30 Output Voltage Low
– Supply Voltage(RL=10[kΩ])
Fig.31 Output Voltage Low – Ambient
Temperature (RL=10[kΩ])
5.5V
3.0V
5
0
-60
1.8V
-40℃
30
25℃
20
85℃
105℃
10
0
-30
0
30
60
90
120
0
105℃
6
1
2
1
2
3
OUTPUT VOLTAGE [V]
Fig.32 Output Source Current –
Output Voltage (VDD=3.0[V])
3
BU7271 family
40
OUTPUT SINK CURRENT [mA]
10
85℃
0
BU7271 family
40
OUTPUT SINK CURRENT [mA]
15
25℃
12
120
AMBIENT TEMPERATURE [°C]
BU7271 family
-40℃
0
-30
SUPPLY VOLTAGE [V]
20
BU7271 family
18
OUTPUT SOURCE CURRENT [mA]
BU7271 family
12
OUTPUT SOURCE CURRENT [mA]
25℃
4
OUTPUT VOLTAGE HIGH [V]
OUTPUT VOLTAGE HIGH [V]
5.5V
12
8
BU7271 family
6
105℃
85℃
12
150
Fig.24 Derating curve
BU7271 family
BU7271 family
16
0
105
100
50
AMBIENT TEMPERATURE [°C]
OUTPUTVOLTAGE
VOLTAGE LOW
LOW [mV]
[mV]
OUTPUT
SUPPLY CURRENT [μA]
BU7271SG
400
AMBIENT TEMPERATURE [°C]
16
OUTPUTVOLTAGE
VOLTAGE LOW [mV]
OUTPUT
600
0
85 100
50
BU7271 family
800
POWER DISSIPATION [mW]
POWER DISSIPATION [mW]
800
SUPPLY CURRENT [μA]
○BU7271 family
Technical Note
30
5.5V
20
10
0
-60
3.0V
1.8V
-30
0
30
60
90
AMBIENT TEMPERATURE [°C]
OUTPUT VOLTAGE [V]
AMBIENT TEMPERATURE [°C]
Fig.33 Output Source Current
– Ambient Temperature
(VOUT=VDD-0.4[V])
Fig.34 Output Sink Current
– Output Voltage (VDD=3[V])
Fig.35 Output Sink Current
– Ambient Temperature
(VOUT=VSS+0.4[V])
120
(*) The above data is ability value of sample, it is not guaranteed.BU7271G：-40[℃]~+85[℃] BU7271SG：-40[℃]~+105[℃]
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
6/17
2010.03 - Rev.A
BU7265G,BU7265SG,BU7271G,BU7271SG,
BU7411G,BU7411SG,BU7421G,BU7421SG
○BU7271 family
BU7271 family
10.0
BU7271 family
10.0
25℃
85℃
-2.5
-5.0
-7.5
1
2
3
4
5
6
-2.5
-5.0
-7.5
Fig.36 Input Offset Voltage
– Supply Voltage
(Vicm=VDD, VOUT=1.5[V])
105℃
85℃
120
100
-40℃
25℃
80
1
2
3
4
5
6
80
1.8V
60
40
20
0
30
60
90
120
3.0V
80
3.0V
1.8V
0
30
60
90
BU7271 family
105℃
85℃
100
80
25℃
-40℃
60
40
20
120
0
1
2
3
4
5
6
SUPPLY VOLTAGE [V]
Fig.41 Common Mode Rejection Ratio
– Supply Voltage
BU7271 family
BU7271 family
80
100
5.5V
80
60
40
60
40
1.8V
3.0V
20
20
0
-60
0
-30
0
30
60
90
120
BU7271 family
-60
-30
0
30
60
90
120
AMBIENT TEMPERATURE [°C]
Fig.44 Slew Rate L-H
– Ambient Temperature
200
150
60
40
100
Gain
20
50
20
0
60
4
Phase
40
30
3
0
-30
100
GAIN [dB]
SLEW RATE H-L [V/ms]
1.8V
80
0
2
120
Fig.43 Power Supply Rejection Ratio
– Ambient Temperature
60
-30
1
Fig.38 Input Offset Voltage – Input
Voltage (VDD=3[V])
100
5.5V
-60
0
INPUT VOLTAGE [V]
AMBIENT TEMPERATURE [°C]
BU7271 family
80
-1
120
AMBIENT TEMPERATURE [°C]
Fig.42 Common Mode Rejection Ratio
– Ambient Temperature
105℃
-10
120
BU7271 family
120
POWER SUPPLY REJECTION RATIO [dB]
COMMON MODE REJECTION RATIO [dB]
100
-30
90
Fig.40 Large Signal Voltage Gain
– Ambient Temperature
BU7271 family
5.5V
0
-60
85℃
-5
AMBIENT TEMPERATURE [°C]
Fig.39 Large Signal Voltage Gain
– Supply Voltage
3.0V
60
5.5V
SUPPLY VOLTAGE [V]
120
30
140
60
-60
60
0
0
160
LARGE SIGNAL VOLTAGE GAIN [dB]
LARGE SIGNAL VOLTAGE GAIN [dB]
140
0
-15
-30
Fig.37 Input Offset Voltage
– Ambient Temperature
(Vicm=VDD, VOUT=1.5[V])
BU7271 family
25℃
-40℃
5
AMBIENT TEMPERATURE [°C]
SUPPLY VOLTAGE [V]
160
3.0V
1.8V
-10.0
-60
-10.0
0
0.0
COMMON MODE REJECTION RATIO [dB]
105℃
SLEW RATE L-H [V/ms]
0.0
5.5V
2.5
10
90
120
AMBIENT TEMPERATURE [°C]
Fig.45 Slew Rate H-L
– Ambient Temperature
PHASE [deg]
-40℃
2.5
5.0
INPUT OFFSET VOLTAGE [mV]
INPUT OFFSET VOLTAGE [mV]
5.0
BU7271 family
15
7.5
7.5
INPUT OFFSET VOLTAGE [mV]
Technical Note
0
0
1.E+00 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06
FREQUENCY [Hz]
Fig.46 Gain – Frequency
(*)The above data is ability value of sample, it is not guaranteed.BU7271G：-40[℃]~+85[℃] BU7271SG：-40[℃]~+105[℃]
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
7/17
2010.03 - Rev.A
BU7265G,BU7265SG,BU7271G,BU7271SG,
BU7411G,BU7411SG,BU7421G,BU7421SG
BU7411 family
POWER DISSIPATION [mW]
BU7411G
400
200
600
BU7411SG
400
200
0
85 100
50
150
Fig.48 Derating curve
0.2
1.6V
0
30
60
90
0
120
2
3
4
5
5
6
BU7411 family
5.5V
4
3.0V
1.6V
2
0
-60
6
-30
0
30
60
90
120
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [°C]
Fig.50 Supply Current
– Ambient Temperature
Fig.51 Output Voltage High
– Supply Voltage (RL=10[kΩ])
Fig.52 Output Voltage High
– Ambient Temperature(RL=10[kΩ])
BU7411 family
OUTPUTVOLTAGE
VOLTAGE LOW
LOW [mV]
OUTPUT
105℃
20
85℃
10
25℃
-40℃
1
2
3
4
5
BU7411 family
30
0
5.5V
20
3.0V
10
1.6V
0
-60
6
SUPPLY VOLTAGE [V]
25℃
-40℃
8
6
4
85℃
105℃
2
0
-30
0
30
60
90
120
0
1
3
Fig.55 Output Source Current
– Output Voltage (VDD=3.0[V])
BU7411 family
20
2
OUTPUT VOLTAGE [V]
Fig.54 Output Voltage Low
– Ambient Temperature (RL=10[kΩ])
BU7411 family
10
BU7411 family
10
AMBIENT TEMPERATURE [°C]
Fig.53 Output Voltage Low
– Supply Voltage (RL=10[kΩ])
BU7411 family
20
-40℃
OUTPUT SINK CURRENT [mA]
OUTPUT SOURCE CURRENT [mA]
1
4
AMBIENT TEMPERATURE [°C]
30
0
25℃
-40℃
0
-30
3
6
OUTPUT SOURCE CURRENT [mA]
0.0
-60
85℃
2
2
Fig.49 Supply Current
– Supply Voltage
105℃
4
1
SUPPLY VOLTAGE [V]
BU7411 family
6
OUTPUT VOLTAGE HIGH [V]
SUPPLY CURRENT [μA]
0.4
25℃
0.2
0
OUTPUT VOLTAGE HIGH [V]
BU7411 family
3.0V
0.4
150
Fig.47 Derating curve
0.6
85℃
0.0
105
100
50
AMBIENT TEMPERATURE [°C]
5.5V
OUTPUTVOLTAGE
VOLTAGE LOW [mV]
OUTPUT
0
AMBIENT TEMPERATURE [°C]
0.8
105℃
0.6
-40℃
0
0
BU7411 family
0.8
8
6
5.5V
4
3.0V
2
1.6V
0
-60
OUTPUT SINK CURRENT [mA]
POWER DISSIPATION [mW ]
600
BU7411 family
800
SUPPLY CURRENT [μA]
○BU7411 family
800
Technical Note
15
25℃
10
85℃
105℃
5
0
-30
0
30
60
90
120
0
1
2
3
15
5
0
-60
5.5V
3.0V
10
1.6V
-30
0
30
60
90
AMBIENT TEMPERATURE [°C]
OUTPUT VOLTAGE [V]
AMBIENT TEMPERATURE [°C]
Fig.56 Output Source Current
– Ambient Temperature
(VOUT=VDD-0.4[V])
Fig.57 Output Sink Current
– Output Voltage (VDD=3[V])
Fig.58 Output Sink Current
– Ambient Temperature
(VOUT=VSS+0.4[V])
120
(*)The above data is ability value of sample, it is not guaranteed.BU7411G：-40[℃]~+85[℃] BU7411SG：-40[℃]~+105[℃]
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
8/17
2010.03 - Rev.A
BU7265G,BU7265SG,BU7271G,BU7271SG,
BU7411G,BU7411SG,BU7421G,BU7421SG
○BU7411 family
BU7411 family
10.0
BU7411 family
10.0
7.5
25℃
0.0
85℃
-5.0
-7.5
1
2
3
4
5
-2.5
3.0V
6
-7.5
Fig.59 Input Offset Voltage
– Supply Voltage
(Vicm=VDD-1[V], VOUT=1.5[V])
-40℃
25℃
100
105℃
85℃
80
1
2
3
4
5
60
-60
6
5.5V
40
20
-30
0
30
60
90
1.6V
85℃
100
25℃
80
0
30
60
90
40
20
120
0
1
3
5
6
BU7411 family
4
5.5V
3
2
3.0V
1
1.6V
-30
0
30
60
90
0
-60
120
BU7411 family
-30
0
30
60
90
120
AMBIENT TEMPERATURE [°C]
Fig.67 Slew Rate L-H
– Ambient Temperature
200
Phase
150
60
100
40
4
Fig.64 Common Mode Rejection Ratio
– Supply Voltage
BU7411 family
100
GAIN [dB]
3.0V
2
SUPPLY VOLTAGE [V]
Fig.66 Power Supply Rejection Ratio
– Ambient Temperature
80
-40℃
60
20
3
105℃
0
-30
40
BU7411 family
3
BU7411 family
120
60
0
-60
2
Fig.61 Input Offset Voltage
– Input Voltage (VDD=3[V])
AMBIENT TEMPERATURE [°C]
2
1
INPUT VOLTAGE [V]
80
5.5V
SLEW RATE H-L [V/ms]
0
100
120
Fig.65 Common Mode Rejection Ratio
– Ambient Temperature
Gain
1.6V
1
50
20
0
-60
-1
5.5V
120
AMBIENT TEMPERATURE [°C]
4
120
Fig.63 Large Signal Voltage Gain
– Ambient Temperature
POWER SUPPLY REJECTION RATIO [dB]
COMMON MODE REJECTION RATIO [dB]
80
0
-60
90
AMBIENT TEMPERATURE [°C]
100
1.6V
3.0V
80
BU7411 family
60
60
100
Fig.62 Large Signal Voltage Gain
– Supply Voltage
3.0V
30
BU7411 family
120
SUPPLY VOLTAGE [V]
120
0
140
60
0
-10
-15
-30
160
LARGE SIGNAL VOLTAGE GAIN [dB]
LARGE SIGNAL VOLTAGE GAIN [dB]
140
25℃
-40℃
-5
Fig.60 Input Offset Voltage
– Ambient Temperature
(Vicm=VDD-1[V], VOUT=1.5[V])
BU7411 family
120
0
AMBIENT TEMPERATURE [°C]
SUPPLY VOLTAGE [V]
160
1.6V
-5.0
-10.0
-60
-10.0
0
0.0
105℃
85℃
5
COMMON MODE REJECTION RATIO [dB]
105℃
5.5V
2.5
SLEW RATE L-H [V/ms]
-2.5
5.0
PHASE [deg]
-40℃
2.5
10
INPUT OFFSET VOLTAGE [mV]
5.0
BU7411 family
15
7.5
INPUT OFFSET VOLTAGE [mV]
INPUT OFFSET VOLTAGE [mV]
Technical Note
-30
0
30
60
90
120
AMBIENT TEMPERATURE [°C]
Fig.68 Slew Rate H-L
– Ambient Temperature
0
0
1.E+00 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06
FREQUENCY [Hz]
Fig.69 Gain – Frequency
(*)The above data is ability value of sample, it is not guaranteed. BU7411G：-40[℃]~+85[℃] BU7411SG：-40[℃]~+105[℃]
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© 2010 ROHM Co., Ltd. All rights reserved.
9/17
2010.03 - Rev.A
BU7265G,BU7265SG,BU7271G,BU7271SG,
BU7411G,BU7411SG,BU7421G,BU7421SG
BU7421 family
POWER DISSIPATION [mW]
[mW
BU7421G
400
200
0
0
400
200
150
0
50
Fig.71 Derating curve
5.5V
10
3.0V
5
1.7V
85℃
25℃
-40℃
30
60
90
120
0
1
AMBIENT TEMPERATURE [°C]
9
85℃
6
-40℃
0
1
2
3
4
3.0V
1.7V
0
-60
6
5
6
5.5V
3.0V
1.7V
2
-30
0
30
60
90
120
AMBIENT TEMPERATURE [°C]
6
3
4
4
0
-60
6
5.5V
9
3
Fig.75 Output Voltage High
– Ambient Temperature (RL=10[kΩ])
BU7421 family
20
25℃
-40℃
15
10
105℃
85℃
5
0
-30
0
30
60
90
120
0
1
2
3
SUPPLY VOLTAGE [V]
AMBIENT TEMPERATURE [°C]
OUTPUT VOLTAGE [V]
Fig.76 Output Voltage Low – Supply
Voltage (RL=10[kΩ])
Fig.77 Output Voltage Low
– Ambient Temperature (RL=10[kΩ])
Fig.78 Output Source Current
– Output Voltage (VDD=3.0[V])
BU7421 family
15
5.5V
3.0V
10
5
1.7V
0
-60
BU7421 family
40
OUTPUT SINK CURRENT [mA]
20
OUTPUT SOURCE CURRENT [mA]
5
5
BU7421 family
12
OUTPUT VOLTAGE LOW [mV]
OUTPUT VOLTAGE LOW [mV]
OUTPUT VOLTAGE
VOLTAGE LOW
OUTPUT
LOW [mV]
[mV]
105℃
25℃
4
Fig.74 Output Voltage High
– Supply Voltage (RL=10[kΩ])
BU7421 family
3
3
2
BU7421 family
SUPPLY VOLTAGE [V]
Fig.73 Supply Current
– Ambient Temperature
12
2
OUTPUT SOURCE CURRENT [mA]
0
1
6
0
-30
-40℃
Fig.72 Supply Current
– Supply Voltage
105℃
2
25℃
5
SUPPLY VOLTAGE [V]
BU7421 family
4
10
0
OUTPUT VOLTAGE HIGH [V]
15
105℃
85℃
150
Fig.70 Derating curve
6
15
0
105
AMBIENT TEMPERATURE [°C]
BU7421 family
0
100
BU7421 family
20
-40℃
25℃
30
20
85℃
10
105℃
0
-30
0
30
60
90
120
0
1
2
3
BU7421 family
40
OUTPUT SINK CURRENT [mA]
SUPPLY CURRENT [μA]
BU7421SG
AMBIENT TEMPERATURE [°C]
20
0
-60
600
0
85 100
50
OUTPUT VOLTAGE HIGH [V]
POWER DISSIPATION [mW]
[mW
600
[mW]
BU7421 family
800
SUPPLY CURRENT [μA]
○BU7421 family
800
Technical Note
30
5.5V
3.0V
20
1.7V
10
0
-60
-30
0
30
60
90
AMBIENT TEMPERATURE [°C]
OUTPUT VOLTAGE [V]
AMBIENT TEMPERATURE [°C]
Fig.79 Output Source Current
– Ambient Temperature
(VOUT=VDD-0.4[V])
Fig.80 Output Sink Current
– Output Voltage
(VDD=3[V])
Fig.81 Output Sink Current
– Ambient Temperature
(VOUT=VSS+0.4[V])
120
(*)The above data is ability value of sample, it is not guaranteed.BU7421G：-40[℃]~+85[℃] BU7421SG：-40[℃]~+105[℃]
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
10/17
2010.03 - Rev.A
BU7265G,BU7265SG,BU7271G,BU7271SG,
BU7411G,BU7411SG,BU7421G,BU7421SG
○BU7421 family
BU7421 family
10.0
0.0
85℃
-5.0
-7.5
0
1
2
3
4
5
0.0
-2.5
85℃
120
-40℃
80
1
2
3
4
5
6
BU7421 family
80
1.7V
60
40
20
-30
0
30
60
90
-1
Fig.88 Common Mode Rejection Ratio
– Ambient Temperature
BU7421 family
25℃
0
2
3
Fig.84 Input Offset Voltage
– Input Voltage (VDD=3[V])
BU7421 family
120
5.5V
3.0V
1
INPUT VOLTAGE [V]
1.7V
80
25℃
-40℃
100
80
85℃
105℃
60
40
20
0
-30
0
30
60
90
0
120
1
2
3
4
5
6
SUPPLY VOLTAGE [V]
Fig.87 Common Mode Rejection Ratio
– Supply Voltage
BU7421 family
BU7421 family
80
100
5.5V
80
60
40
60
40
3.0V
1.7V
20
20
0
-60
120
-40℃
-10
120
100
AMBIENT TEMPERATURE [°C]
80
90
BU7421 family
120
POWER SUPPLY REJECTION RATIO [dB]
100
0
-60
60
Fig.86 Large Signal Voltage Gain
– Ambient Temperature
5.5V
105℃
-5
AMBIENT TEMPERATURE [°C]
Fig.85 Large Signal Voltage Gain
– Supply Voltage
3.0V
30
120
SUPPLY VOLTAGE [V]
120
0
140
60
-60
60
85℃
0
-15
-30
160
LARGE SIGNAL VOLTAGE GAIN [dB]
LARGE SIGNAL VOLTAGE GAIN [dB]
105℃
140
0
5
Fig.83 Input Offset Voltage
– Ambient Temperature
(Vicm=VDD-1.2[V], VOUT=1.5[V])
BU7421 family
25℃
10
AMBIENT TEMPERATURE [°C]
Fig.82 Input Offset Voltage
– Supply Voltage
(Vicm=VDD-1.2[V], VOUT=1.5[V])
100
1.7V
-7.5
SUPPLY VOLTAGE [V]
160
3.0V
-5.0
-10.0
-60
6
5.5V
2.5
COMMON MODE REJECTION RATIO [dB]
105℃
5.0
SLEW RATE L-H [V/ms]
-2.5
INPUT OFFSET VOLTAGE [mV]
INPUT OFFSET VOLTAGE [mV]
25℃
-40℃
2.5
BU7421 family
15
7.5
5.0
-10.0
COMMON MODE REJECTION RATIO [dB]
BU7421 family
10.0
7.5
INPUT OFFSET VOLTAGE [mV]
Technical Note
0
-30
0
30
60
90
120
-60
-30
0
30
60
90
AMBIENT TEMPERATURE [°C]
AMBIENT TEMPERATURE [°C]
Fig.89 Power Supply Rejection Ratio
– Ambient Temperature
Fig.90 Slew Rate L-H
– Ambient Temperature
BU7421 family
100
120
200
Phase
80
40
3.0V
1.7V
150
60
100
40
Gain
20
50
20
0
-60
-30
0
30
60
90
120
AMBIENT TEMPERATURE [°C]
Fig.91 Slew Rate H-L
– Ambient Temperature
PHASE [deg]
GAIN [dB]
SLEW RATE H-L [V/ms]
5.5V
60
0
0
1.E+00 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06
FREQUENCY [Hz]
Fig.92 Gain – Frequency
(*)The above data is ability value of sample, it is not guaranteed. BU7421G：-40[℃]~+85[℃] BU7421SG：-40[℃]~+105[℃]
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
11/17
2010.03 - Rev.A
BU7265G,BU7265SG,BU7271G,BU7271SG,
BU7411G,BU7411SG,BU7421G,BU7421SG
Technical Note
●Schematic Diagram
VDD
VDD
Vbias
Vbias
IN+
IN+
class
IN-
AB control
class
IN-
OUT
AB control
Vbias
OUT
Vbias
VSS
VSS
○Input-Output Full Swing
BU7265/BU7271 family
○Ground Sense
BU7411/BU7421 family
Fig.93 Schematic Diagram
●Test circuit1 NULL method
VDD,VSS,EK,Vicm Unit:[V]
VF
S1
S2
S3
VF1
ON
ON
OFF
Parameter
Input Offset Voltage
VF2
Large Signal Voltage Gain
3
EK
0
-1.5
-0.5
ON
ON
ON
3
0
ON
ON
OFF
3
0
-1.5
BU7265/
BU7271
ON
ON
OFF
1.8
VF6 BU7421
ON
ON
OFF
1.7
0
-0.9
BU7411
ON
ON
OFF
1.6
ON
ON
OFF
5.5
VF3
VF4
Common-mode Rejection Ratio
(Input Common-mode Voltage Range)
Power Supply Rejection Ratio
VDD VSS
VF5
VF7
－ Calculation－
1. Input Offset Voltage (Vio)
Vio =
2. Large Signal Voltage Gain (Av)
Av = 20Log
3 Common-mode Rejection Ratio (CMRR)
CMRR = 20Log
4. Power Supply Rejection Ratio (PSRR)
PSRR = 20Log
|VF1|
-2.5
Vicm
Calculation
BU7265
BU7411 BU7421
/BU7271
3
2
1.8
1
1.5
1
0.9
2
0
0
0
3
2
1.8
0
0
0
3
4
[V]
1+Rf/Rs
2×(1+Rf /Rs)
|VF2-VF3|
[dB]
⊿Vicm ×(1+Rf /Rs)
|VF4-VF5|
[dB]
⊿VDD×(1+Rf /Rs) [dB]
|VF6-VF7|
0.1[μF]
Rf=50[kΩ]
SW1
RK=500[kΩ]
VDD
EK
RS＝50[Ω]
0.01[μF]
15V
Ri=1[MΩ]
RK=500[kΩ]
0.015[μF]
RS＝50[Ω]
0.015[μF]
DUT
NULL
SW3
Ri=1[MΩ]
1000[pF]
V
RL
Vicm
VF
SW2
50[kΩ]
VSS
VRL
-15V
Fig.94 Test circuit 1
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
12/17
2010.03 - Rev.A
BU7265G,BU7265SG,BU7271G,BU7271SG,
BU7411G,BU7411SG,BU7421G,BU7421SG
●Test circuit2
Technical Note
switch condition
SW No.
SW
1
SW
2
SW
3
SW
4
SW
5
SW
6
SW
7
SW
8
Supply Current
OFF
OFF
ON
OFF
ON
Maximum Output Voltage (RL=10[kΩ])
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
ON
Output Current
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
Slew Rate
OFF
OFF
ON
OFF
OFF
Maximum Frequency
ON
OFF
OFF
ON
ON
OFF
ON
OFF
OFF
SW
9
SW
10
SW
11
SW
12
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
OFF
OFF
ON
SW3
SW4
R2=100[kΩ]
VDD=3[V]
A
SW1
SW2
SW5
SW6
SW7
R1=1[kΩ]
SW8
SW9
RL
CL
SW10
SW11
SW12
GND
A
～
VIN-
VIN+
～
V
V
～
Vo
Fig.95 Test circuit2
VIN
VOUT
[V]
[V]
SR= ΔV /Δt
3[V]
3[V]
ΔV
3[VP-P]
Δt
0[V]
t
0[V]
t
Fig.96 Slew rate input output wave
(Input-Output Full Swing BU7265 family, BU7271 family)
VIN
VOUT
[V]
[V]
SR= ΔV /Δt
1.8[V]
1.8[V]
ΔV
1.8[VP-P]
Δt
0[V]
t
0[V]
t
Fig.97 Slew rate input output wave
(Ground Sense BU7411 family, BU7421 family)
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13/17
2010.03 - Rev.A
BU7265G,BU7265SG,BU7271G,BU7271SG,
BU7411G,BU7411SG,BU7421G,BU7421SG
Technical Note
●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)
Without deterioration or destruction of characteristics of internal circuit.
1.2 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.
1.3 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 Input offset current (Iio)
Indicates the difference of input bias current between non-inverting terminal and inverting terminal.
2.3 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 Circuit current (IDD)
Indicates the IC current that flows under specified conditions and no-load steady status.
2.5 High level output voltage / Low level output voltage (VOM)
Indicates the voltage range that can be output by the IC under specified load condition. It is typically divided into
high-level output voltage and low-level output voltage. High-level output voltage indicates the upper limit of output
voltage. Low-level output voltage indicates the lower limit.
2.6 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)
2.7 Input common-mode voltage range (Vicm)
Indicates the input voltage range where IC operates normally.
2.8 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)
2.9 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)
2.10 Channel separation (CS)
Indicates the fluctuation of input offset voltage or that of output voltage with reference to the change of output
voltage of driven channel.
2.11 Slew rate (SR)
Indicates the time fluctuation ratio of voltage output when step input signal is applied.
2.12 Unity gain frequency (ft)
Indicates a frequency where the voltage gain of Op-Amp is 1.
2.13 Total harmonic distortion + Noise (THD+N)
Indicates the fluctuation of input offset voltage or that of output voltage with reference to the change of output
voltage of driven channel.
2.14 Input referred noise voltage (Vn)
Indicates a noise voltage generated inside the operational amplifier equivalent by ideal voltage source connected in
series with input terminal.
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14/17
2010.03 - Rev.A
BU7265G,BU7265SG,BU7271G,BU7271SG,
BU7411G,BU7411SG,BU7421G,BU7421SG
Technical Note
●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.98 (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.98 (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. Fig.99(c)-(d) show a derating curve for an example of BU7265 family, BU7271family,
BU7411family, BU7421family.
θja =
(Tj－Ta) / Pd [ ℃ / W]
Ambient temperature Ta[ ℃ ]
Package face temperature Ta[℃ ]
Power dissipation of IC
[W]
Pd(max)
P2
θja2 <θja1
θja2
P1
Tj(max)
θja1
0
Chip surface temperature Tj[ ℃ ]
50
25
100
75
125
Ambient temperatureTa[℃ ]
150
BU7265/BU7271
BU7411/BU7421
BU7411/BU7421
Tj(max)
Power dissipation Pd[W]
(b) Derating curve
(a) Thermal resistance
Fig.98 Thermal resistance and derating
800
POWER DISSIPATION [mW] .
POWER DISSIPATION [mW] .
800
540[mW]
600
400
200
540［mW］
600
400
200
0
0
0
85 100
50
AMBIENT TEMPERATURE [℃]
0
150
Unit
5.4
[mW/℃]
100 105
150
(d) BU7265SG BU7271SG
BU7411SG BU7421SG
(c) BU7265G BU7271G
BU7411G BU7421G
1/θja
50
AMBIENT TEMPERATURE [℃]
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
Fig.99 Derating Curve
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15/17
2010.03 - Rev.A
BU7265G,BU7265SG,BU7271G,BU7271SG,
BU7411G,BU7411SG,BU7421G,BU7421SG
Technical Note
●Notes for 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 operational amplifier 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) Output short circuit
If short circuit occurs between the output terminal and VDD terminal , excessive in output current may flow and generate
heat , causing destruction of the IC.Take due care.
7) Using under strong electromagnetic field
Be careful when using the IC under strong electromagnetic field because it may malfunction.
8) 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.
9) 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.
10) 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.
11) Decupling capacitor
Insert the decupling capacitance between VDD and VSS, for stable operation of operational amplifier.
12) Latch up
Be careful of input voltage that exceed the VDD and VSS. When CMOS device have sometimes occur latch up operation.
And protect the IC from abnormaly noise.
13) Crossover distortion
Inverting amplifier generates crossover distortion when feed back resistance value is small. To suppress the crossover
distortion, connect a resistor between the output terminal and VSS Then increse the bias current to enable class A output
stage operation.
Feed back resistance
VDD
+
Pull down resistance
Fig.100 Pull down resistance
VSS
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16/17
2010.03 - Rev.A
BU7265G,BU7265SG,BU7271G,BU7271SG,
BU7411G,BU7411SG,BU7421G,BU7421SG
Technical Note
●Ordering Part Number
B
U
7
Part No.
BU
2
Part No.
・7265
・7271
・7411
・7421
6
5
S
G
-
Package
G:SSOP5
7265S
7271S
7411S
7421S
T
R
Packaging and forming specification
TR: Embossed tape and reel
SSOP5
5
4
1
2
0.2Min.
+0.2
1.6 −0.1
2.8±0.2
<Tape and Reel information>
+6°
4° −4°
2.9±0.2
3
Tape
Embossed carrier tape
Quantity
3000pcs
Direction
of feed
TR
The direction is the 1pin of product is at the upper right when you hold
( reel on the left hand and you pull out the tape on the right hand
1pin
+0.05
0.13 −0.03
1.25Max.
)
0.05±0.05
1.1±0.05
S
+0.05
0.42 −0.04
0.95
0.1
S
Direction of feed
(Unit : mm)
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© 2010 ROHM Co., Ltd. All rights reserved.
Reel
17/17
∗ Order quantity needs to be multiple of the minimum quantity.
2010.03 - Rev.A
Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specified herein is subject to change for improvement without notice.
The content specified herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specifications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specified herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices).
The Products specified in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any
of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
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R1010A