Technical Note

3/16

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2010.09 - Rev.A

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

BU7831KN

●

Reference Data (Unless otherwise specified, Ta=25 ℃,AVDD=DVDD=3.0V)

0.0

0.2

0.4

0.6

0.8

1.0

2.0

2.5

3.0

3.5

4.0

4.5

SUPPLY VOLTAGE : VDD(V)

-100

-80

-60

-40

-20

0

20

-100

-80

-60

-40

-20

0

INPUT LEVEL : VIN (dBV)

-100

-80

-60

-40

-20

0

20

-100

-80

-60

-40

-20

0

INPUT LEVEL : VIN (dBV)

0.01

0.10

1.00

10.00

100.00

-100

-80

-60

-40

-20

0

INPUT LEVEL : VIN (dBV)

-100

-80

-60

-40

-20

0

20

-100

-80

-60

-40

-20

0

INPUT LEVEL : VIN (dBV)

0.01

0.10

1.00

10.00

100.00

-100

-80

-60

-40

-20

0

INPUT LEVEL : VIN (dBV)

0.01

0.10

1.00

10.00

100.00

-100

-80

-60

-40

-20

0

INPUT LEVEL : VIN (dBV)

0.01

0.10

1.00

10.00

100.00

-100

-80

-60

-40

-20

0

INPUT LEVEL : VIN (dBV)

0.01

0.10

1.00

10.00

100.00

-100

-80

-60

-40

-20

0

INPUT LEVEL : VIN (dBV)

0

2

4

6

8

10

2.0

2.5

3.0

3.5

4.0

4.5

SUPPLY VOLTAGE : VDD(V)

0

2

4

6

8

10

2.0

2.5

3.0

3.5

4.0

4.5

SUPPLY VOLTAGE : VDD(V)

Fig.1 Stand-by current

Fig.6 Total Harmonic

Distortion (EXTO)

Fig.11 Linearity (EXTO)

Fig.12 Linearity (SPL)

-100

-80

-60

-40

-20

0

20

-100

-80

-60

-40

-20

0

INPUT LEVEL : VIN (dBV)

Fig.5 Total Harmonic

Distortion (HPR)

Fig.4 Total harmonic

Distortion (HPL)

Fig.2 Operation current

At Headphone AMP part

Fig.9 Linearity (HPL)

Fig.8 Total Harmonic

Distortion (SPR)

Fig.7 Total Harmonic

Distortion (SPL)

Fig.10 Linearity (HPR)

Fig.3 Operation current

Of All blocks