Technical Note

9/36

www.rohm.com

2010.12 - Rev.A

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

BU7261/BU7261S family, BU7241/BU7241S family, BU7295/BU7295S family, BU7275/BU7275S family

BU7262/BU7262S family, BU7242/BU7242S family, BU7264/BU7264S family, BU7244/BU7244S family

○

BU7244 family (Unless otherwise specified VDD=+3[V], VSS=0[V], Ta=25[℃])

Parameter

Symbol

Temperature

Range

Limits

Unit

Condition

BU7244F

BU7244SF

Min.

Typ.

Max.

Input Offset Voltage

(*20) (*21)

Vio

25℃

－

1

9

mV

VDD=1.8 ~ 5.5[V]

VOUT=VDD/2

Full range

－

－

10

Input Offset Current

(*20)

Iio

25℃

－

1

－

pA

－

Input Bias Current

(*20)

Ib

25℃

－

1

－

pA

－

Supply Current

(*21)

IDD

25℃

－

360

750

μA

RL=∞ All Op-Amps

AV=0[dB], VIN=1.5[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

95

－

dB

RL=10[kΩ]

Input Common-mode Voltage Range

Vicm

25℃

0

－

3

V

VDD-VSS=3[V]

Common-mode Rejection Ratio

CMRR

25℃

45

60

－

dB

－

Power Supply Rejection Ratio

PSRR

25℃

60

80

－

dB

－

Output Source Current

(*22)

IOH

25℃

4

10

－

mA

VDD-0.4[V]

Output Sink Current

(*22)

IOL

25℃

5

12

－

mA

VSS+0.4[V]

Slew Rate

SR

25℃

－

0.4

－

V/μs CL=25[pF]

Gain Band width

FT

25℃

－

0.9

－

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

Phase Margin

θ

25℃

－

50

－

°

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

Total Harmonic Distortion

THD

25℃

－

0.05

－

%

VOUT=0.8[Vp-p],

f=1[kHz]

Channel Separation

CS

25℃

－

100

－

dB

AV=40[dB]

(*20) Absolute value

(*21) Full range: BU7244: Ta=-40[℃] ~ +85[℃] BU7244S: Ta=-40[℃] ~ +105[℃]

(*22) 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.