BU7858KN datasheet(5/25 Pages) ROHM

Part #	BU7858KN

Description	Mixer & Selector ICs with 16bit D/A Converter

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Manufacturer	ROHM [Rohm]

Direct Link	http://www.rohm.com

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5 / 25 page

Technical Note

5/24

www.rohm.com

2010.09 - Rev.A

BU7858KN,BU7893GU

・

Audio Path (SP PREamp)

Unless otherwise specified,Ta=25℃,AVDD=2.8V, Reference input level =-6dBV, f=1kHz,

A-weighted, path gain =0dB, RL=33kΩ

Parameter

Symbol

Limits

Unit

Conditions

Min.

Typ.

Max.

THD+N

THDSP

-

-70

-60

dB

20kHz LPF

Output Noise Voltage

VNOSP

-

-90

-80

dBV

At no a signal

Mute Level

MLSP

-

-90

-80

dB

1kHz BPF

・

Audio Path (HP amp)

Unless otherwise specified, Ta=25℃, AVDD=2.8V, reference input level =-6dBV, f=1kHz,

A-weighted, path gain =0dB, RL=16Ω

Parameter

Symbol

Limits

Unit

Conditions

Min.

Typ.

Max.

THD+N

THDHP

-

-65

-55

dB

20kHz LPF

Output Noise Voltage

VNOHP

-

-90

-80

dBV

At no signal

The Maximum Output Power

POHP

10

-

mW

THD=10%,16Ω load

Channel Separation

CSHP

-

-80

-70

dB

Vo=-14dBV,1kHz BPF

Mute Level

MLHP

-

-90

-80

dB

1kHz BPF

HPL_V Volume Setting 1

GA1HPL

-48

-

0

dB

2dB step

HPL_V Volume Setting 2

GA2HPL

-42

-

+6

dB

2dB step

HPR_V Volume Setting 1

GA1HPR

-48

-

0

dB

2dB step

HPR_V Volume Setting 2

GA2HPR

-42

-

+6

dB

2dB step

・

3D Surround, Equalizer, and Audio DAC

Unless otherwise specified, Ta=25℃, AVDD=2.8V, BCLK=64fs, LRCLK=256fs, f=1kHz, path gain=0dB,

SPOL/SPOR output, SPOL/SPOR= no load, output=0dBFS

Parameter

Symbol

Limits

Unit

Conditions

Min.

Typ.

Max.

Full-scale Amplitude

VMAX

1.40

1.68

2.00

VP-P

0.6×AVDD

S/N1 (A-Weighted)

DACsn1

70

75

-

dB

THD+N1 (20kHz LPF)

DACthd1

-

-70

-60

dB

fs=8,11.025kHz

THD+N2 (20kHz LPF)

DACthd2

-

-75

-65

dB

fs=16,22.05,32,44.1,48kHz

・

Audio I/F Format

Unless otherwise specified, Ta=25℃, DVDD_IO=1.62～3.3V, DVDD_CORE=1.62～1.98V

Parameter

Symbol

Limits

Unit

Conditions

Min.

Typ.

Max.

BCLK Output Frequency

FBCKO

0.512

-

3.072

MHz

64fs

LRCLK Output Frequency

FLRCKO

8

-

48

kHz

SDI Set-up Time

tSDSU

100

-

nsec

SDI Hold Time

tSDH

100

-

nsec

・

PLL

Unless otherwise specified, Ta=25℃, AVDD=2.8V, BCLK = no load

Parameter

Symbol

Limits

Unit

Conditions

Min.

Typ.

Max.

PLL Lock-up Time

Tlock1

-

10

msec

PLL Jitter

Tjitter1

-

200

-

psec

BCLK terminal,fVCO=65.536MHz

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