Technical Note

2/16

BU7150NUV

www.rohm.com

2011.05 - Rev.C

© 2011 ROHM Co., Ltd. All rights reserved.

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Electrical characteristics

Ta=25°C, VDD=1.5V, f=1kHz, VSS=GND unless otherwise specified.

Parameter

Symbol

Limits

Unit

Conditions

Min.

Typ.

Max.

No Signal Operating Current

IDD

-

1

1.4

mA

No load, No signal

Shutdown Current

ISD

-

3

9

μA

SDB Pin=VSS

Mute Current

IMUTE

-

15

-

μA

MUTEB Pin=VSS, SE

Output Offset Voltage

VOFS

-

5

50

mV

| VOUT1 – VOUT2 |, No signal

Maximum Output Power

PO

70

85

-

mW

RL=8Ω, BTL, THD+N=1%

-

14

-

mW

RL=16Ω, SE, THD+N=1%

Total Harmonic Distortion +Noise

THD+N

-

0.2

0.5

%

20kHz LPF, RL=8Ω, BTL, PO=25mW

-

0.1

0.5

%

20kHz LPF, RL=16Ω, SE,PO=5

ｍW

Output Voltage Noise

VNO

-

10

-

20kHz LPF + A-weight

Crosstalk

CT

-

85

-

dB

RL=16Ω, SE, 1kHz BPF

Power Supply Rejection Ratio

PSRR

-

62

-

dB

-

66

-

dB

Input Logic High Level

VIH

0.7

-

-

V

MUTEB Pin, SDB Pin

Input Logic Low Level

VIL

-

-

0.3

V

MUTEB Pin, SDB Pin

“BTL” is BTL-mode when MODE Pin = VDD, “SE” is single-ended mode when MODE Pin = VSS.

Turn-on time in BTL mode is about 11 times faster than single-ended mode.

Also, BTL mode does not have MUTE mode. When MUTEB Pin = VSS, then it will be shutdown mode.

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Block diagram

Fig. 1 Block diagram

Bias

Generator

Control Logic

IN1

BYPASS

MUTEB

VDD

MODE

OUT1

SDB

IN2

OUT2

VSS

1

2

3

4

5

10

9

8

7

6

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