Technical Note

7/26

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2010.12 - Rev.A

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

BU7291G,BU7291SG,BU7255HFV,BU7255SHFV,

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

○

BU5281 family(Unless otherwise specified VDD=+3[V], VSS=0[V], Ta=25[℃])

Parameter

Symbol

Temperature

Range

Limits

Unit

Condition

BU5281G, BU5281SG

Min.

Typ.

Max.

Input Offset Voltage

(*17)

Vio

25℃

－

0.1

2.5

mV

－

Input Offset Voltage drift

(*17)

ΔVio/ΔT

-

－

0.8

－

μV/℃

－

Input Offset Current

(*17)

Iio

25℃

－

1

－

pA

－

Input Bias Current

(*17)

Ib

25℃

－

1

－

pA

－

Supply Current

(*18)

IDD

25℃

－

750

1000

μA

RL=∞ All Op-Amps

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

Full range

－

－

1200

High Level Output Voltage

VOH

25℃

VDD-0.1

－

－

V

RL=10[kΩ]

Low Level Output Voltage

VOL

25℃

－

－

VSS+0.1

V

RL=10[kΩ]

Large Signal Voltage Gain

AV

25℃

70

110

－

dB

RL=10[kΩ]

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

(*19)

IOH

25℃

5

8

－

mA

VDD-0.4[V]

Output Sink Current

(*19)

IOL

25℃

10

16

－

mA

VSS+0.4[V]

Slew Rate

SR

25℃

－

2.0

－

V/μs

CL=25[pF]

Gain Band width

FT

25℃

－

3

－

MHz

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

Phase Margin

θ

25℃

－

40

－

°

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

Input Referred Noise Voltage

Vin

25℃

－

18

－

nV/(Hz)

－

3.2

－

μVrms AV=40[dB], DINAUDIO

Total Harmonic Distortion

THD

25℃

－

0.003

－

%

VOUT=0.4[Vp-p], f=1[kHz]

(*17) Absolute value

(*18) Full range BU5281: Ta=-40[℃]~+85[℃] BU5281S: Ta=-40[℃]~+105[℃]

(*19) 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.