ROHM BU7251G, BU7251SG, BU7231G, BU7231SG, BU7252F Technical data

ROHM’s Selection Operational Amplifier/Comparator Series

Comparators: Low Voltage CMOS

BU7251G,BU7251SG,BU7231G,BU7231SG, BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

●Description CMOS comparator B U7 251/ B U 72 31f am i l y a nd BU7252/BU7232 family are input full swing and push pull o u tput compar a tor. 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 supplyVoltage that is +1.8V to +5.5V(single supply) and low supply current, extremely low input bias current.

High speed

Single

Dual

Low power

Single

Dual

●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 (BU7231 family, BU7232 family)

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)

● Pin Assignments

IN-

VSS

IN+

1

－

2

＋

3

VDD

5

OUT

4

BU 7251G BU 7251SG BU 7231G BU 7231SG

BU7251 G

(BU7251SG:105

BU7252 F/FVM

(BU7252S F/FVM:105

BU7231 G

(BU7231SG:105℃)

BU7232 F/FVM

(BU7232S F/FVM:105 ℃ )

OUT1

IN1-

IN1+

VSS

SOP8SSOP5

BU 7252F BU 7252SF BU 7232F BU 7232SF

℃)

1

CH1

2

- +

3

4

℃)

CH2

+ -

VDD

8

OUT2

7

IN2-

6

5

IN2+

MSOP8

BU 7252FVM BU 7252SFVM BU 7232FVM BU 7232SFVM

No.09049EAT06

www.rohm.com

1/18

2009.05 - Rev.A

BU7251G,BU7251SG, BU7231G,BU7231SG, BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

Technical Note

●Absolute maximum ratings (Ta=25[℃])

Rating

Parameter Symbol

Supply Voltage VDD-VSS +7 V Differential Input Voltage

(*1)

Vid VDD-VSS V

BU7251G,BU7252 F/FVM BU7231G,BU7232 F/FVM

BU7251SG,BU7252S F/FVM BU7231SG,BU7232S F/FVM

Input Common-mode voltage range Vicm (VSS-0.3) to VDD+0.3 V Operating Temperature Topr -40 to+85 -40 to+105 ℃ Storage Temperature Tstg -55 to+125 ℃ Maximum junction Temperature Tjmax +125 ℃

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 ab soluted maximum rated temperature environment may cause deterioration of characteri stics. (*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 (Unless otherwise specified VDD=+3[V], VSS=0[V], Ta=25[℃])

Parameter Symbol

(*2)

(*2)(*4) (*2)

Input Offset Voltage Input Offset Current Input Bias Current Input Common-mode voltage Range Large Signal Voltage Gain

Supply current Power supply rejection ratio

Common-mode rejection ratio Output source current Output sink current High Level Output Voltage Low Level Output Voltage

(*4)

PSRR 25℃ CMRR 25℃

(*3)

(*4)

Output rise time 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：Ta=-40[℃] to +85[℃] BU7251S：Ta=-40[℃] to +105[℃]

TPLH 25℃ TPHL 25℃

T emperature

range

Vio 25℃

Iio 25℃

Ib 25℃

Vicm 25℃

AV 25℃

IDD

25℃

full range - - 50

IOH 25℃ IOL 25℃

VOH 25℃

VOL 25℃

Tr 25℃

Tf 25℃

Guaranteed Limit

BU7251G,BU7251SG

Unit Condition

Min. Typ. Max.

- 1 11

- 1 -

mV -

pA pA -

0 - 3

- 90 -

- 15 35

- 80 -

- 80 1 2 3 6 -

dB RL=10[kΩ] μA RL=∞ dB -

dB mA VDD-0.4 mA VSS+0.4

VDD-0.1 - -

- - VSS+0.1

- 50 -

- 20 -

- 0.55 -

μs CL=15pF 100mV over drive

- 0.25 -

V (VDD-VSS)=3[V]

V RL=10[kΩ]

V RL=10[kΩ] ns CL=15pF 100mV over drive ns CL=15pF 100mV over drive

μs CL=15pF 100mV over drive

○BU7252 family (Unless otherwise specified VDD=+3[V], VSS=0[V], Ta=25[℃])

Guaranteed Limit

Parameter Symbol

(*2)

(*2)(*4) (*2)

Input Offset Voltage Input Offset Current Input Bias Current Input Common-mode voltage Range Large Signal Voltage Gain

Supply current Power supply rejection ratio

Common-mode rejection ratio Output source current Output sink current High Level Output Voltage Low Level Output Voltage

(*4)

PSRR 25℃ CMRR 25℃

(*3)

(*4)

Output rise time 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[℃]

TPLH 25℃ TPHL 25℃

T emperature

range

Vio 25℃

Iio 25℃

Ib 25℃

Vicm 25℃

AV 25℃

IDD

25℃

full range - - 80

IOH 25℃ IOL 25℃

VOH 25℃

VOL 25℃

Tr 25℃

Tf 25℃

BU7252 F/FVM

BU7252S F/FVM

Unit Condition

Min. Typ. Max.

- 1 11

- 1 -

mV -

pA pA -

0 - 3

- 90 -

- 35 65

- 80 -

- 80 1 2 3 6 -

dB RL=10[kΩ] μA RL=∞ dB -

dB mA VDD-0.4 mA VSS+0.4

VDD-0.1 - -

- - VSS+0.1

- 50 -

- 20 -

- 0.55 -

μs CL=15pF 100mV over drive

- 0.25 -

V (VDD-VSS)=3[V]

V RL=10[kΩ]

V RL=10[kΩ] ns CL=15pF 100mV over drive ns CL=15pF 100mV over drive

μs CL=15pF 100mV over drive

Unit

2/18

BU7251G,BU7251SG, BU7231G,BU7231SG, BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

Technical Note

○BU7231 family (Unless otherwise specified VDD=+3[V], VSS=0[V], Ta=25[℃])

Guaranteed Limit

Parameter Symbol

T emperature

range

BU7231G,BU7231SG

Unit Condition

Min. Typ. Max. Input Offset Voltage Input Offset Current Input Bias Current

(*5)

Vio 25℃ - 1 11 mV -

(*5)

Iio 25℃ - 1 - pA -

(*5)

Ib 25℃ - 1 - pA Input Common-mode voltage Range Vicm 25℃ 0 - 3 V (VDD-VSS)=3[V] Large Signal Voltage Gain AV 25℃ - 90 - dB RL=10[kΩ]

Supply current IDD

25℃ - 5 15

full range - - 30

μA RL=∞

Power supply rejection ratio PSRR 25℃ - 80 - dB - Common-mode rejection ratio CMRR 25℃ - 80 - dB - Output source current Output sink current High Level Output Voltage Low Level Output Voltage

(*6)

IOH 25℃ 1 2 - mA VDD-0.4

(*6)

IOL 25℃ 3 6 - mA VSS+0.4

(*7)

VOH 25℃ VDD-0.1 - - V RL=10[kΩ]

(*7)

VOL 25℃ - - VSS+0.1 V RL=10[kΩ] Output rise time Tr 25℃ - 50 - ns CL=15pF 100mV over drive Output fall time Tf 25℃ - 20 - ns CL=15pF 100mV over drive Propagation delay L to H TPLH 25℃ - 1.7 - μs CL=15pF 100mV over drive Propagation delay H to L TPHL 25℃ - 0.5 - mV CL=15pF 100mV over drive

(*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：Ta=-40[℃] to +85[℃] BU7231S,BU7232S：Ta=-40[℃] to +105[℃]

○BU7232 family (Unless otherwise specified VDD=+3[V], VSS=0[V], Ta=25[℃])

Guaranteed Limit

Parameter Symbol

T emperature

range

BU7232F/FVM

BU7232S F/FVM

Unit Condition

Min. Typ. Max. Input Offset Voltage Input Offset Current Input Bias Current

(*5)

Vio 25℃ - 1 11 mV -

(*5)

Iio 25℃ - 1 - pA -

(*5)

Ib 25℃ - 1 - pA Input Common-mode voltage Range Vicm 25℃ 0 - 3 V (VDD-VSS)=3[V] Large Signal Voltage Gain AV 25℃ - 90 - dB RL=10[kΩ]

Supply current IDD

25℃ - 10 25

full range - - 50

μA RL=∞

Power supply rejection ratio PSRR 25℃ - 80 - dB - Common-mode rejection ratio CMRR 25℃ - 80 - dB - Output source current Output sink current High Level Output Voltage Low Level Output Voltage

(*6)

IOH 25℃ 1 2 - mA VDD-0.4

(*6)

IOL 25℃ 3 6 - mA VSS+0.4

(*7)

VOH 25℃ VDD-0.1 - - V RL=10[kΩ]

(*7)

VOL 25℃ - - VSS+0.1 V RL=10[kΩ] Output rise time Tr 25℃ - 50 - ns CL=15pF 100mV over drive Output fall time Tf 25℃ - 20 - ns CL=15pF 100mV over drive Propagation delay L to H TPLH 25℃ - 1.7 - μs CL=15pF 100mV over drive Propagation delay H to L TPHL 25℃ - 0.5 - mV CL=15pF 100mV over drive

(*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,BU7232：Ta=-40[℃] to +85[℃] BU7232S：Ta=-40[℃] to +105[℃]

3/18

BU7251G,BU7251SG, BU7231G,BU7231SG,

.

y

BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

Technical Note

●Example of electrical characteristics ○BU7251 family

800

600

400

BU7251G

200

POWER DISSIPATION [mW] .

0

0 50 100 150

AMBIENT TEMPERATURE [℃]

Fig. 1 Fig. 2 Fig. 3

50

Derating Curve

BU7251 famil

800

600

BU7251SG

400

200

POWER DISSIPATION [mW]

0

050100150

AMBIENT TEMPERATURE [℃]

BU7251 famil

Derating Curve

6

BU7251 family

60

50

40

30

20

SUPPLY CURRENT [μA]

10

0

123456

85℃

SUPPLY VOLTAGE [V]

BU7251 family

105℃

25℃

-40℃

Supply Current – Supply Voltage

8

BU7251 famil

40

30

20

SUPPLY CURRENT [μA]

10

5.5V

1.8V

0

-60 -30 0 30 60 90 120 AMBIENT TEMPERATURE [℃]

Fig. 4 Fig. 5 Fig. 6

Supply Current – Ambient Temperature

50

3.0V

BU7251 famil

4

2

OUTPUT VOLTAGE HIGH [V]

0

123456

Output Voltage High – Supply Voltage

50

105℃

85℃

25℃

-40℃

SUPPLY VOLTAGE [V]

(RL=10[kΩ])

BU7251 famil

6

5.5V

4

2

OUTPUT VOLTAGE HIGH [V]

0

-60 -30 0 30 60 90 120

3.0V

1.8V

AMBIENT TEMPERATURE [℃]

Output Voltage High – Ambient Temperature

(RL=10[kΩ])

10

BU7251 famil

40

30

20

10

OUTPUT VOLTAGE LOW [mV]

0

123456

Fig. 7 Fig. 8 Fig. 9

Output Voltage Low – Supply Voltage

5

4

105℃

85℃

-40℃

SUPPLY VOLTAGE [V]

(RL=10[kΩ])

25℃

BU7251 famil

3

5.5V

2

1

OUTPUT SOURCE CU RRENT [mA]

0

-60 -30 0 30 60 90 120 AMBIENT TEMPERATURE [℃]

3.0V

1.8V

Fig. 10 Fig. 11 Fig. 12

Output Source Current – Ambient Temperature

(*) The above date is ability value of sample, it is not guaranteed. BU7251G：-40[℃] to+85[℃] BU7251SG：-40[℃] to+105[℃]

(VOUT=VDD-0.4[V])

30

20

10

OUTPUT VOLTAGE LOW [mV]

0

-60 -30 0 30 60 90 120

5.5V

1.8V

3.0V

AMBIENT TEMPERATURE [℃]

Output Voltage Low – Ambient

-40℃

(RL=10[kΩ])

BU7251 famil

25℃

85℃

105℃

Temperature

30

25

20

15

10

5

OUTPUT SINK CURRENT [mA]

0

0.0 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT VOLTAGE [V]

Output Sink Current – Output Voltage

(VDD=3[V])

8

-40℃

6

4

2

OUTPUT SOURCE CURRENT [mA]

0

85℃

105℃

0.0 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT VOLTAGE [V]

25℃

Output Source Current – Supply

(VDD=3[V])

Voltage

20

15

10

5

OUTPUT SINK CURRENT [ mA]

0

-60-300306090120

3.0V

1.8V

AMBIENT TEMPERATURE [℃]

BU7251 family

5.5V

Output Sink Current – Ambient Temperature

(VOUT=VSS+0.4[V])

4/18

BU7251G,BU7251SG, BU7231G,BU7231SG,

y

BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

Technical Note

○BU7251 family

10.0

7.5

5.0

2.5

0.0

-2.5

-5.0

INPUT OFFSET VOLTAGE [mV]

-7.5

-10.0 123456

Fig. 13 Fig. 14 Fig. 15

Input Offset Voltage – Supply Voltage

(Vicm=VDD, Vout=0.1[V])

160

85℃

25℃

SUPPLY VOLTAGE [V]

105℃

-40℃

BU7251 family

BU7251 famil

10.0

7.5

5.0

2.5

INPUT OFFSET VOLTAGE [mV]

0.0

-2.5

-5.0

-7.5

-10.0

5.5V

-60 -30 0 30 60 90 120 AMBIENT TEMPERATURE [℃]

BU7251 famil

3.0V

1.8V

Input Offset Voltage – Ambient Temperature

(Vicm=VDD, Vout=0.1[V])

160

BU7251 family

15

10

5

0

-5

-10

INPUT OFFSET VOLTAGE [mV]

-15

-1 0 1 2 3 4 INPUT VOLTAGE [V]

85℃

-40℃

105℃

25℃

Input offset voltage – Input Voltage

(VDD=3[V])

120

BU7251 famil

BU7251 family

140

120

105℃

100

80

LARGE SIGNAL VOLTAGE GAIN [dB]

60

Fig. 16 Fig. 17 Fig. 18

Large Signal Voltage Gain – Supply Voltage

-40℃

123456

SUPPLY VOLTAGE [V]

85℃

25℃

120

BU7251 family

120

100

80

LARGE SIGNAL VOLTAGE GAIN [dB]

60

-60 -30 0 30 60 90 120

1.8V

3.0V

5.5V

AMBIENT TEMPERATURE [℃]

Large Signal Voltage Gain

– Ambient Temperature

120

BU7251 famil

100

80

60

40

20

COMMON MODE REJECT ION RATIO [dB]

0

123456

85℃

105℃

SUPPLY VOLTAGE [V]

25℃

-40℃

Common Mode rejection Ratio

– Supply Voltage

2.0

(VDD=3[V])

BU7251 family

100

80

60

40

20

COMMON MODE REJECT ION RATIO [dB]

0

-60 -30 0 30 60 90 120

Fig. 19 Fig. 20 Fig. 21

Common Mode Rejection Ratio –

0.8

5.5V

1.8V

AMBIENT TEMPERATURE [

3.0V

Ambient Temperature

(VDD=3[V])

BU7251 famil

]

℃

100

80

60

40

20

POWER SUPPLY REJECT ION RATIO [dB]

0

-60 -30 0 30 60 90 120 AMBIENT TEMPERATURE [

Power Supply Rejection –

Ambient Temperature

1.5

1.0

0.5

PROPAGATION DELAY L-H [μs]

0.0

]

℃

1.8V

5.5V

3.0V

-60 -30 0 30 60 90 120 AMBIENT TEMPERATURE [

]

℃

Propagation Delay L-H –

Ambient Temperature

0.6

0.4

1.8V

5.5V

0.2

PROPAGATION DELAY H-L [μs]

0.0

-60 -30 0 30 60 90 120

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[℃]

3.0V

AMBIENT TEMPERATURE [℃]

5/18

BU7251G,BU7251SG, BU7231G,BU7231SG,

y

BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

Technical Note

○BU7252 family

1000

800

600

400

POWER DISSIPATION [mV]

200

0

0 50 100 150

AMBIENT TEMPERATURE [℃] .

Fig. 23 Fig. 24 Fig. 25

150

BU7252F

Derating Curve

85

BU7252 famil

BU7252FVM

BU7252 family

1000

800

600

400

PO WER DIS SIPATION [ mV]

200

0

0 50 100 150

AMBIENT TEMPERATURE [℃] .

BU7252SF

Derating Curve

8

BU7252 family

BU7252SFVM

105

BU7252 family

150

100

50

SUPPLY CURRENT [μA]

0

-40℃

123456

SUPPLY VOLTAGE [V]

Supply Current – Supply Voltage

8

100

50

SUPPLY CURRENT [μA]

1.8V

3.0V

0

-60 -30 0 30 60 90 120 AMBIENT T E MPERATURE [

Fig. 26 Fig. 27 Fig. 28

Supply Curreny – Ambient Temperature

50

5.5V

℃

BU7252 famil

]

6

4

2

OUTPUT VOLTAGE HIGH [V]

0

123456

105℃

85℃

25℃

-40℃

SUPPLY VOLTAGE [V]

Output Voltage High – Supply Voltage

(RL=10[kΩ])

50

BU7252 famil

6

4

2

OUTPUT VOLTAGE HIGH [V]

0

-60 -30 0 30 60 90 120 AMBIENT TEMPERATURE [℃]

Output Voltage High – Ambient Temperature

10

40

30

20

10

OUTPUT VOLTAGE LOW [mV]

0

Fig. 29 Fig. 30 Fig. 31

5

4

3

2

1

OU T PUT SOUR CE C URRENT [mA ]

0

-60-30 0 30 60 90120

Output Source Current – Ambient Temperature

-40℃

123456

SUPPLY VOLTAG E [V]

Output Voltage Low – Supply

Voltage

3.0V

1.8V

AMBIENT TEMPERATURE [℃]

Fig. 32 Fig. 33 Fig. 34

(VOUT=VDD-0.4[V])

85℃

25℃

(RL=10[kΩ])

5.5V

105℃

BU7252 famil

40

30

20

10

OUTPUT VOLTAGE LOW [mV]

0

-60 -30 0 30 60 90 120 AMBIENT TEMPERATURE [℃]

5.5V

3.0V

1.8V

Output Voltage Low – Ambient

-40℃

(RL=10[kΩ])

BU7252 famil

85℃

105℃

Temperature

30

25

20

15

10

OUT PU T S INK CURR E NT [mA ]

25℃

5

0

0.0 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT VOLTAGE [V]

Output Sink Current – Output Voltage

(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[℃]

8

-40℃

6

4

105℃

2

OUTPUT SOURCE CURRENT [mA]

0

0 0.5 1 1.5 2 2.5 3

OUTPUT VOLTAGE [V]

Output Source Current – Output

Voltage

20

15

10

1.8V

5

OUTPUT SINK CURRENT [ mA]

0

-60-300306090120 AMBIENT TEMPERATURE [℃]

Output Sink Current – Ambient Temperature

(VOUT=VSS+0.4[V])

BU7252 famil

105℃

85℃

25℃

BU7252 family

5.5V

3.0V

1.8V

(RL=10[kΩ])

BU7252 family

25℃

85℃

(VDD=3[V])

BU7252 famil

5.5V

3.0V

6/18

BU7251G,BU7251SG, BU7231G,BU7231SG,

y

BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

Technical Note

○BU7252 family

10.0

7.5

5.0

2.5

0.0

-2.5

-5.0

INPUT OFFSET VOLTAGE [mV]

-7.5

-10.0 123456

SUPPLY VOLTAGE[V]

Fig. 35 Fig. 36 Fig. 37

Input Offset Voltage – Supply Voltage

(Vicm=VDD,VOUT=0.1[V])

160

140

120

100

80

60

40

LARGE SIGNAL VOLTAGE GAIN [dB]

20

123456

25℃

105℃

SUPPLY VOLTAGE [V]

Fig. 38 Fig. 39 Fig. 40

Large Signal Voltage Gain – Supply

Voltage

120

-40℃

85℃

-40℃

BU7252 famil

25℃

105℃

BU7252 family

1.8V

BU7252 family

3.0V

5.5V

10.0

7.5

5.0

2.5

0.0

-2.5

-5.0

INPUT OFFSET VOLTAGE [mV]

-7.5

-10.0

-60 -30 0 30 60 90 120 AMBIENT TEM PE RAT URE [℃]

Input Offset Voltage – Ambient Temperature

(Vicm=VDD,VOUT=0.1[V])

160

140

120

100

80

60

40

LARGE SIGNAL VOLTAGE GAI N [dB]

20

1.8V

3.0V

5.5V

-60-300 306090120 AMBIENT TEMPERATURE [℃]

BU7252 famil

Large Signal Voltage Gain

– Ambient Temperature

120

BU7252 family

15

10

5

0

-5

-10

INPUT OFFSET VOLTAGE [mV]

-15

-1 0 1 2 3 4 INPUT VOLTAGE [V]

BU7252 famil

-40℃

25℃

105℃

85℃

Input Offset Voltage – Input Voltage

(VDD=3[V])

120

100

80

60

40

20

COMMON MODE REJECTION RATIO [dB]

105℃

85℃

25℃

0

123456

SUPPLY VOLTAGE [V]

BU7252 famil

-40℃

Common Mode Rejection Ratio

– Supply Voltage

2.0

(VDD=3[V])

BU7252 famil

100

80

5.5V

60

40

20

COMMON MODE REJECT ION RATIO [dB]

0

-60 -30 0 30 60 90 120

Fig. 41 Fig. 42 Fig. 43

Common Mode Rejection – Ambient

0.8

1.8V

AMBIENT TEM PERATURE [℃]

Temperature

3.0V

(VDD=3[V])

BU7251 family

100

80

60

40

20

POWER SUPPLY REJECTION RATIO [dB]

0

-60 -30 0 30 60 90 120 AMBIENT TEMPERATURE [℃]

Power Supply Rejection Ratio – Ambient

Temperature

1.5

1.0

0.5

PROPAGATION DELAY L-H [μs]

0.0

-60 -30 0 30 60 90 120

1.8V

5.5V

3.0V

AMBIENT TEMPERATURE [℃]

Propagation Delay L-H – Ambient

Temperature

0.6

0.4

1.8V

3.0V

0.2

PROPAGATION DELAY H-L [μs]

Propagation Delay H-L – Ambient Temperature

5.5V

0.0

-60 -30 0 30 60 90 120 AMBIENT TEMPERATURE [℃]

Fig. 44

(*) The above date is ability value of sample, it is not guaranteed. BU7252 F/FVM：-40[℃] to+85[℃] BU7252S F/FVM：-40[℃] to+105[℃]

7/18

5.5V

BU7251G,BU7251SG, BU7231G,BU7231SG,

]

.

y

BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

Technical Note

○BU7231 series

800

BU7231 famil

800

BU7231 famil

20

BU7231 family

600

400

BU7231G

200

POWER DISSIPATION [mW] .

0

0 50 100 150

AMBIENT TEM PERATURE [℃]

Fig. 45 Fig. 46 Fig. 47

12

Derating Curve

85

BU7231 famil

600

400

200

POWER DISSIPATION [mW]

0

050100150

AMBIENT TEMPERATURE [℃]

6

BU7231SG

105

Derating Curve

BU7231 famil

16

12

8

SUPPLY CURRENT [μA]

4

0

123456

85℃

SUPPLY VOLTAGE [V]

105℃

25℃

-40℃

Supply Current – Supply Voltage

8

BU7231 famil

10

5.5V

8

6

3.0V

SUPPLY CURRENT [μA]

4

1.8V

2

-60 -30 0 30 60 90 120 AMBIENT TEMPERATURE [℃]

Fig. 48 Fig. 49 Fig. 50

Supply Current – Ambient Temperature

50

40

BU7231 family

30

20

10

OUTPUT VO LT AGE LOW [mV

0

0246 8

SUPPLY VOLTAGE [V]

Fig. 51 Fig. 52 Fig. 53

105℃

85℃

25℃

-40℃

Output Voltage Low – Supply Voltage

(RL=10[kΩ])

5

BU7231 family

4

3

2

1

OUTP UT SOURCE CURRENT [mA]

0

-60 -30 0 30 60 90 120

AMBIENT TEMPERATURE [℃]

5.5V

3.0V

1.8V

Fig. 54 Fig. 55 Fig. 56

Output Source Current – Ambient Temperature

(VOUT=VDD-0.4[V])

4

2

OUTPUT VOLTAGE HIGH [V]

0

123456

Output Voltage – Supply Voltage

50

40

30

20

1.8V

10

OUTPUT VOLTAGE LOW [mV]

3.0V

0

-60 -30 0 30 60 90 120 AMBIENT TEMPERATURE [℃]

Output Voltage Low – Ambient Temperature

30

25

20

15

10

5

OUTPUT SINK CURRENT [mA]

0

0.0 0.5 1.0 1.5 2.0 2.5 3.0

Output Sink Current – Output Voltage

105℃

85℃

25℃

-40℃

SUPPLY VOLTAGE [V]

(RL=10[kΩ])

5.5V

(RL=10[kΩ])

-40℃

105℃

OUTPUT VOLTAGE [V]

(VDD=3[V])

BU7231 famil

BU7231 family

25℃

85℃

6

5.5V

4

2

OUTPUT VOLTAGE HIGH [V]

0

-60 -30 0 30 60 90 120

3.0V

1.8V

AMBIENT TEMPERATURE [℃]

Output Voltage High – Ambient Temperature

(RL=10[kΩ])

10

8

6

4

2

OUTPUT SOURCE CURRENT [mA]

0

85℃

105℃

0 0.5 1 1.5 2 2.5 3

OUTPUT VOLTAGE [V]

BU7231 famil

-40℃

25℃

Output Source Current – Output Voltage

(VDD=3[V])

20

15

10

5

OUTPUT SINK CURRENT [mA]

0

-60 -30 0 30 60 90 120

3.0V

1.8V

AMBIENT TEMPERATURE [℃]

BU7231 famil

5.5V

Output Sink Current – Ambient Temperature

(VOUT=VSS+0.4[V])

(*) The above date is ability value of sample, it is not guaranteed. BU7231G：-40[℃] to+85[℃] BU7231SG：-40[℃] to+105[℃]

8/18

BU7251G,BU7251SG, BU7231G,BU7231SG,

y

BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

Technical Note

○BU7231 series

25℃

3.0V

BU7231 famil

85℃

BU7231 famil

85℃

BU7231 famil

(VDD=3[V])

10.0

7.5

5.0

2.5

0.0

-2.5

-5.0

INPUT OFFSET VOLTAGE [mV]

-7.5

-10.0

-60 -30 0 30 60 90 120

3.0V

5.5V

AMBIENT TEM PERATURE [℃]

BU7231 famil

1.8V

Input Offset Voltage – Ambient Temperature

(Vicm=VDD, Vout=0.1[V])

160

140

120

100

80

LARGE SIGNAL VOLTAGE GAIN [dB]

60

-60 -30 0 30 60 90 120

3.0V

AMBIENT TEM PERATURE [℃]

BU7231 famil

1.8V

5.5V

Large Signal Voltage Gain

– Ambient Temperature

120

100

80

60

40

20

POWER SUPPLY REJECTION RATIO [dB]

0

-60 -30 0 30 60 90 120 AMBIENT TEMPERATURE [℃]

BU7231 family

Power Supply Rejection Ratio

– Ambient Temperature

85℃

BU7231 famil

105℃

25℃

15

10

5

0

-5

-10

INPUT OFFSET VOLTAGE [mV]

-15

-101234

-40℃

INPUT VOLTAGE [V]

Input Offset Voltage – Input Voltage

(VDD=3[V])

120

100

80

60

40

20

COMMON MODE REJECT ION RATIO [dB]

0

123456

85℃ 105℃

25℃

SUPPLY VOLTAGE [V]

BU7231 family

-40℃

Common Mode Rejection Ratio

– Supply Voltage

5

4

3

2

1

PROPAGATION DELAY L-H [μs]

0

1.8V

-60 -30 0 30 60 90 120 AMBIENT TEM PERATURE [℃]

5.5V

(VDD=3[V])

BU7231 family

3.0V

Propagation Delay L-H

– Ambient Temperature

10.0

7.5

5.0

2.5

0.0

-2.5

-5.0

INPUT OFFS ET VOLTAGE [ mV ]

-7.5

-10.0 123456

Fig. 57 Fig. 58 Fig. 59

Input Offset Voltage – Supply Voltage

(Vicm=VDD, Vout=0.1[V])

160

-40℃

25℃

105℃

SUPPLY VOLTAGE [V]

140

120

100

80

LARGE SIGNAL VOLTAGE GAIN [dB]

60

123456

Fig. 60 Fig. 61 Fig. 62

Large Signal Voltage Gain – Supply Voltage

105℃

-40℃

SUPPLY VOLTAGE [V]

120

100

80

60

40

20

COMMON MODE REJECTION RA TIO [dB]

0

-60 -30 0 30 60 90 120

Fig. 63 Fig. 64 Fig. 65

Common Mode Rejection Ratio

– Ambient Temperature

5.5V

1.8V

AMBIENT TEMPERATURE [℃]

1.5

BU7231 famil

1.2

0.9

0.6

0.3

PROPAGATION DELAY H-L [μs]

0.0

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[℃]

1.8V

-60 -30 0 30 60 90 120 AMBIENT TEM PERATURE [℃]

Fig. 66

5.5V

3.0V

9/18

BU7251G,BU7251SG, BU7231G,BU7231SG,

y

]

y

BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

Technical Note

○BU7232 family

1000

800

BU7232 family

1000

800

BU7232 family

50

40

BU7232 family

600

400

POWER DISSIP A TION [mV]

200

0

0 50 100 150

Fig. 67 Fig. 68 Fig. 69

50

BU7232F

BU7232FVM

85

AMBIENT TEMPERATURE [℃] .

Derating Curve

BU7232 famil

600

400

POWER DISSIP A TION [mV]

200

0

0 50 100 150

AMBIENT TEMPERATURE [℃] .

BU7232SF

Derating Curve

8

BU7232SFVM

105

BU7232 famil

30

20

-40℃

SUPPLY CURRE NT [µA]

10

0

123456

105℃

85℃

25℃

SUPPLY VOLTAGE [V]

Supply Current – Supply Voltage

8

BU7232 famil

40

30

20

SUPPLY CURRENT [μA]

10

1.8V

5.5V

3.0V

0

-60-300 306090120 AMBIENT TEMPERATURE [℃]

Fig. 70 Fig. 71 Fig. 72

Supply Current – Ambient emperature

50

40

BU7232 family

30

20

10

OUTPUT VOLTAGE LOW [mV]

0

1234567

Fig. 73 Fig. 74 Fig. 75

Output Voltage Low – Supply Voltage

5

85℃

-40℃

SUPPLY VOLTAGE [V]

(RL=10[kΩ])

105℃

25℃

BU7232 famil

4

5.5V

3

2

1

OUTPUT SOURCE CURRENT [mA]

0

-60 -30 0 30 60 90 120

3.0V

1.8V

AMBIENT TE MPERATURE [℃]

Fig. 76 Fig. 77 Fig. 78

Output Source Current – Ambient Temperature

(VOUT=VDD-0.4[V])

6

4

2

OUTPUT VOLTAGE HIGH [V]

0

1234567

105℃

85℃

25℃

-40℃

SUPPLY VOLTAGE [V]

Output Voltage High – Supply Voltage

(RL=10[kΩ])

40

30

20

10

OUTPUT VOLT AGE LOW [mV

0

-60-300 306090120

3.0V

1.8V

AMBIENT TEMPERATURE [℃]

BU7232 family

5.5V

Output Voltage Low – Ambient temperature

(RL=10[kΩ])

85℃

BU7232 famil

105℃

30

-40℃

25℃

20

10

OUTPUT SINK CURRENT [mA]

0

0.0 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT VOLTAGE [V]

Output Sink Current – Output Voltage

(VDD=3[V])

6

4

2

OUTPUT VOLTAGE HIGH [V]

0

-60 -30 0 30 60 90 120

Output Voltage – Ambient Temperature

10

8

-40℃

6

4

2

OUTPUT SO URCE CURRENT [mA]

0

00.511.522.53

Output Source Current – Output Voltage

20

15

10

5

OUTPUT SI NK CURRENT [mA]

0

-60 -30 0 30 60 90 120

Output Sink Current – 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[℃]

5.5V

3.0V

1.5V

AMBIENT TEMPERATURE [

(RL=10[kΩ])

25℃

85℃

105℃

OUTPUT VOLTAGE [V]

BU7232 family

(VDD=3[V])

BU7232 family

5.5V

3.0V

1.8V

AMBIENT TEMPERATURE [℃]

(VOUT=VSS+0.4[V])

]

℃

10/18

BU7251G,BU7251SG, BU7231G,BU7231SG,

y

BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

Technical Note

○BU7232 family

10.0

7.5

5.0

2.5

0.0

-2.5

-5.0

INPUT OFFSET VOLTAGE [mV]

-7.5

-10.0

Input Offset Voltage – Ambient Temperature

160

85℃

123456

AMBIENT TEMPERATURE [

-40℃

Fig. 79 Fig. 80 Fig. 81

(Vicm=VDD, VOUT=0.1[V])

105℃

BU7232 famil

25℃

℃

BU7232 famil

BU7232 family

3.0V

BU7232 famil

5.5V

]

℃

15

10

-40℃

5

0

-5

-10

INPUT OFFSET VOLTAGE [mV]

-15

-101234

105℃

85℃

25℃

INPUT VOLTAGE [V]

10.0

7.5

5.0

2.5

0.0

-2.5

-5.0

INPUT OFFSET VOLTAGE [mV]

-7.5

-10.0

]

-60 -30 0 30 60 90 120

1.8V

AMBIENT TEMPERATURE [

Input Offset Voltage – Ambient Temperature

(Vicm=VDD, VOUT=0.1[V])

160

BU7232 famil

Input Offset Voltage – Input Voltage

(VDD=3[V])

120

BU7232 family

140

120

100

80

LARGE SIGNAL VOLTAGE GAIN [dB]

60

123456

Fig. 82 Fig. 83 Fig. 84

Large Signal Voltage Gain – Supply Voltage

25℃

105℃

-40℃

SUPPLY VOLTAGE [V]

85℃

5.5V

3.0V

BU7232 family

(VDD=3[V])

BU7232 famil

120

100

80

60

40

20

COMMON MODE REJECTION RA TIO [dB]

0

-60 -30 0 30 60 90 120

Fig. 85 Fig. 86 Fig. 87

Common Mode Rejection Ratio –

Ambient Temperature

1.5

1.2

1.8V

AMBIENT TEMPERATURE [℃]

120

100

80

LARGE SIGNAL VOLTAGE GAIN [dB]

60

-60 -30 0 30 60 90 120

1.8V

5.5V

3.0V

AMBIENT TEMPERATURE [

Large Signal Voltage Gain

– Ambient Temperature

120

100

80

60

40

20

POWER SUPPLY REJECTION RATIO [dB]

0

-60 -30 0 30 60 90 120 AMBIENT TEMPERATURE [℃]

Power Supply Rejection Ratio

– Ambient Temperature

]

℃

BU7232 famil

100

80

60

40

20

COMMON MODE REJECTI ON RATIO [dB]

0

123456

105℃

-40℃

25℃

SUPPLY VOLTAGE [V]

Common Mode Rejection Ratio

– Supply Voltage

5

4

3

2

1

PROPAGATION DELAY L-H [μs]

0

5.5V

-60 -30 0 30 60 90 120 AMBIENT TEMPERATURE [℃]

(VDD=3[V])

BU7232 family

3.0V

1.8V

Propagation Delay L-H – Ambient

temperature

0.9

0.6

0.3

PROPAGATION DELAY H-L [us]

0.0

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[℃]

5.5V

1.8V

3.0V

-60 -30 0 30 60 90 120 AMBIENT TEMPERATURE [℃]

Fig. 88

11/18

BU7251G,BU7251SG, BU7231G,BU7231SG,

KEKRK

F

m

BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

Technical Note

●Schematic diagram

Fig. 89 Simplified schematic

●Test circuit1 NULL method VDD,VSS,EK,Vicm, Unit : [V]

Parameter VF S1 S2 S3

VDD VSS EK Vicm

Input offset voltage VF1 ON ON OFF 3 0 -0.1 0.3 1 Large signal voltage gain

Common-mode rejection ratio (Input common-mode voltage range)

Power supply rejection ratio

VF2 VF3 -2.7 VF4 VF5 3 VF6 VF7 5.5

ON ON ON 3 0

ON ON OFF 3 0 -0.1

ON ON OFF

1.8

-0.3

0.3 2

0 -0.1 0.3 4

-Calculation-

1. Input offset Voltage (Vio)

Vio =

|VF1|

1+Rf/Rs

[V]

2. Large signal voltage gain (Av)

3. Common-mode rejection ratio (CMRR)

4. Power supply rejection ratio (PSRR)

0.47[μF]

RS＝50[Ω]

Vic

RS＝50[Ω]

S1

0.1[uF]

Ri＝1[MΩ] Ri＝1[MΩ]

0.1[uF]

VDD

DUT

VSS

50[kΩ]

S2

Rf

50[kΩ]

S3 RL

500[kΩ]0.01[μF]

500[kΩ]

R

NULL

+15[V]

-15[V]

V

Fig. 90 Test Circuit 1 (one channel only)

0

Calculation

3

12/18

BU7251G,BU7251SG, BU7231G,BU7231SG,

6SW7SW4SW3CLSW8RL

o

BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

Technical Note

●Test circuit2 switch condition Unit : [V]

SW No.

SW

1

SW

2

SW

3

SW

4

SW

5

SW

6

SW

7

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 OFF OFF OFF OFF OFF ON OFF OFF response time ON OFF ON OFF ON OFF OFF ON

VDD=3[V]

－

SW1 SW2

＋

SW5SW

VIN- VIN+

GND

V

Fig. 91 Test circuit2 (one channel only)

1.6[V]

V

IN

[V]

Input Wav e Input Wav e

入力波形

Vref=1.5[V]

1.4[V]

3[V]

100mV over drive

V

OUT [V]

Out put Wave Output Wave

出力波形

Vref=1.5[V]

1.6[V]

1.4[V]

3[V]

V

IN

[V]

V

OUT [V]

入力波形

100mV over drive

t

出力波形

1.5[V]

0[V]

t

TPHL

0[V]

t

TPLH

Fig. 92 Slew rate input output wave

SW

8

13/18

BU7251G,BU7251SG, BU7231G,BU7231SG, BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

●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 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 mounte d 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 Input common-mode voltage range (Vicm)

Indicates the input voltage range where IC operates normally.

2.5 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 Circuit current (ICC)

Indicates the IC current that flows under specified conditions and no-load steady status.

2.7 Output sink current (OL)

Indicates the maximum current that can be output under specified output condition (such as output vol tage and load condi tion).

2.8 Output saturation voltage, Low level output voltage (VOL)

Indicates the voltage range that can be output under specified load conditions.

2.9 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)

Technical Note

14/18

BU7251G,BU7251SG, BU7231G,BU7231SG,

A

[

.

A

[

BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

Technical Note

●Derating curve Power dissipation (total loss) indicates the pow er that can be consumed by IC at Ta=25℃(normal temperature).IC is heated when it consumed power , and the tempe rature of IC ship be comes higher than ambient temperature. The temperature that can be accepted by IC chip depends on circuit configuration, manufacturing process, and co nsumable pow er is limited. Power dissipation is determined by the temperature all owed in IC chip (maximum junction tempe rature) and thermal resist ance o f package (heat dissipation capa bility ). The maximum jun ction te mperature is typically equal to the maximum val ue in the storage package (heat dissipation capability ). The maximum ju nction temperature is typically equal to the maximum value in the storage temperature range. Heat generated by consumed pow er of IC radiates from the mol d resin or lead frame of the package. The parameter w hich indicates thi s heat dissip ation cap ability (hardness of heat relea se) is called thermal resistance, represented by the symbol θj-a[℃/W]. The temperature of IC insid e the p a ckage can be estima ted by this thermal resistance. Fig.93 (a) shows the model of thermal resistance of the p ackage. Thermal resista nce θja, ambient temperature Ta, junction temperature Tj, and power dissipation Pd can be cal culated by the equation below : θja ＝ (Tj-Ta) / Pd [℃/W] ・・・・・ (Ⅰ) Derating curve in Fig.93 (b) indicates power that can be consu med by IC with reference to a mbient tempera ture. Pow er that can be consumed by IC begins to attenuate at certain ambien t tempera ture. This gradient is determined by thermal resistance θja. Thermal resistance θja depends on chip size , pow er consumption, p ackage, 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. Fig94(c)-(f) show a derating curve for an ex ample of BU7251family, BU7252 family, BU7231 family , BU7232 family.

θja = ( Tj ーTa ) / Pd [℃/W]

Power dissipation Pd:[W]

LSI

P2

の消費電力

Pd(max)

[W]

θja2 < θja1

mbient temperature Ta

Chip surface temperature Tj [℃]

Pow er di ssipa tio n P [ W]

(a) Thermal resistance

800

600

400

200

POWER DISSIPATION [mW]

0

050100150

AMBIENT TEMPERATURE [

(c) BU7251G BU7231G

800

600

400

200

POWER DISSIPATION [mW]

0

0 50 100 150

AMBIENT TEMPERATURE [

(e) BU7251SG BU7231SG (f) BU7252S F/FVM BU72432S F/FVM

]

℃

P1

θja1

0507510012515025

mbient temperature:Ta

周囲温度

Ta[℃]

℃

(b) Derating curve

Fig. 93. Thermal resistance and power dissipation

1000

800

BU7251G(*8)

540[mw]

85

540[mw]

BU7231G(*8)

]

℃

BU7251SG(*8) BU7231SG(*8)

105

]

℃

600

400

200

POWER DISSIPATION [mW]

0

0 50 100 150

AMBIENT TEMPERATURE [℃]

(d) BU7252F/FVM BU7232F/FVM

1000

800

600

400

200

POWER DISSIPATION [mW]

0

0 50 100 150

620[mw]

480[mw]

AMBIENT TEMPERATURE [℃]

]

BU7251/BU7231

620[mw]

480[mw]

85

BU7252SF(*9) BU7232SF(*9)

BU7252SFVM(*10) BU7232SFVM(*10)

θja2

Tj(max)

BU7252F(*9) BU7232F(*9)

BU7252FVM(*10)

BU7232FVM(*10)

105

Tj(max)

(*8) (*9) (*10) Unit

5.4 6.2 4.8 [mW/℃]

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. 94.

Derating curve

15/18

BU7251G,BU7251SG, BU7231G,BU7231SG, BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

●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 safel y 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 inputterminals 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

Technical Note

16/18

BU7251G,BU7251SG, BU7231G,BU7231SG, BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

●Ordering part number

B U 7 2 5 2 F V M - T R

Technical Note

Part No. Part No.

Package 7231 , 7231S 7251 , 7251S 7252 , 7252S 7232 , 7232S

SOP8

5.0±0.2

(MAX 5.35 include BURR)

7

6

+

6

°

4

°

−4°

0.17

0.3MIN

+0.1

-

0.05

(Unit : mm)

0.9±0.15

4.4±0.2

6.2±0.3

438251

0.595

1.5±0.1

0.11

1.27

S

0.42±0.1

SSOP5

2.8±0.2

2.9±0.2

5

4

+0.2

−0.1

1.6

12

3

4

0.13

°

+

6

°

−4

0.2Min.

+0.05

−0.03

1.25Max.

1.1±0.05

0.05±0.05

0.95

+0.05

0.42

−0.04

0.1

(Unit : mm)

G: SSOP5 F: SOP8 FVM: MSOP8

Embossed carrier tapeTape

Quantity

Direction of feed

Quantity

Direction of feed

2500pcs E2

()

Embossed carrier tapeTape 3000pcs

TR

()

Packaging and forming specification E2: Embossed tape and reel (SOP8) TR: Embossed tape and reel (SSOP5/MSOP8)

The direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand

Reel

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

Reel

1pin

Order quantity needs to be multiple of the minimum quantity.

∗

1pin

Order quantity needs to be multiple of the minimum quantity.

∗

Direction of feed

17/18

BU7251G,BU7251SG, BU7231G,BU7231SG, BU7252F/FVM,BU7252S F/FVM,BU7232F/FVM,BU7232S F/FVM

MSOP8

Quantity

Direction of feed

(MAX 3.25 include BURR)

2.8±0.1

4.0±0.2

0.475

0.9MAX

0.75±0.05

0.08±0.05

2.9±0.1

8

1

2

0.65

6

57

4

3

1PIN MARK

+0.05

0.22

–0.04

0.08 S

+

6°

4°

−4°

0.6±0.2

0.29±0.15

+0.05

0.145

–0.03

S

(Unit : mm)

Technical Note

Embossed carrier tapeTape 3000pcs

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

Direction of feed

Reel

Order quantity needs to be multiple of the minimum quantity.

∗

18/18

Notes

No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd.

The content specied herein is subject to change for improvement without notice.

The content specied 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 specications, 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 specied 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 specied 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 par ties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information.

Notice

The Products specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, communication devices, electronic appliances and amusement devices).

The Products specied 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, re or any other damage caused in the event of the failure of any Product, such as derating, redundancy, re 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, transpor tation equipment, aerospace machinery, nuclear-reactor controller, fuel-controller 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.

If you intend to export or ship overseas any Product or technology specied herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law.

Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us.

ROHM Customer Support System

http://www.rohm.com/contact/

R0039

A

ROHM BU7251G, BU7251SG, BU7231G, BU7231SG, BU7252F Technical data

Specifications and Main Features

Frequently Asked Questions

User Manual