Technical Note

5/26

www.rohm.com

2010.12 - Rev.A

© 2010 ROHM Co., Ltd. All rights reserved.

BU7291G,BU7291SG,BU7255HFV,BU7255SHFV,

BU7495HFV,BU7495SHFV,BU7481G,BU7481SG,BU7485G,BU7485SG,BU5281G,BU5281SG

○BU7481 family(Unless otherwise specified VDD=+3[V], VSS=0[V], Ta=25[℃])

Parameter

Symbol

Temperature

Range

Limits

Unit

Condition

BU7481G, BU7481SG

Min.

Typ.

Max.

Input Offset Voltage

(*11)

Vio

25℃

－

1

8

mV

－

Input Offset Current

(*11)

Iio

25℃

－

1

－

pA

－

Input Bias Current

(*11)

Ib

25℃

－

1

－

pA

－

Supply Current

(*12)

IDD

25℃

－

420

750

μA

RL=∞ All Op-Amps

AV=0[dB],VIN=0.9[V]

Full range

－

－

900

High Level Output Voltage

VOH

25℃

VDD-0.1

－

－

V

RL=10[k

Ω]

Low Level Output Voltage

VOL

25℃

－

－

VSS+0.1

V

RL=10[k

Ω]

Large Signal Voltage Gain

AV

25℃

70

105

－

dB

RL=10[k

Ω]

Input Common-mode

Voltage Range

Vicm

25℃

0

－

1.8

V

VSS ~ VDD-1.2[V]

Common-mode Rejection Ratio

CMRR

25℃

45

60

－

dB

－

Power Supply Rejection Ratio

PSRR

25℃

60

80

－

dB

－

Output Source Current

(*13)

IOH

25℃

5

8

－

mA

VDD - 0.4[V]

Output Sink Current

(*13)

IOL

25℃

9

16

－

mA

VSS + 0.4[V]

Slew Rate

SR

25℃

－

3.2

－

V/

μs

CL=25[pF]

Gain Band width

FT

25℃

－

2.8

－

MHz

CL=25[pF], AV=40[dB]

Phase Margin

θ

25℃

－

50

－

°

CL=25[pF], AV=40[dB]

Total Harmonic Distortion

THD

25℃

－

0.03

－

%

VOUT=0.8[Vp-p], f=1[kHz]

(*11) Absolute value

(*12) Full range BU7481: Ta=-40[℃]~+85[℃]

BU7481S: Ta=-40[℃]~+105[℃]

(*13) 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.