WM8778SEDS/RV 데이터 시트보기 (PDF) - Wolfson Microelectronics plc

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WM8778SEDS/RV

24-bit, 192kHz Stereo CODEC

Wolfson Microelectronics plc 

WM8778

Production Data

RECOMMENDED OPERATING CONDITIONS

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

Digital supply range

DVDD

2.7

Analogue supply range

AVDD, DACREFP

2.7

Ground

AGND, DGND,

DACREFN,

ADCREFGND

Difference DGND to AGND

-0.3

TYP

0

0

MAX

3.6

5.5

UNIT

V

V

V

+0.3

V

Note: Digital supply DVDD must never be more than 0.3V greater than AVDD.

ELECTRICAL CHARACTERISTICS

Test Conditions

AVDD = 5V, DVDD = 3.3V, AGND = 0V, DGND = 0V, TA = +25oC, fs = 48kHz, MCLK = 256fs unless otherwise stated.

PARAMETER

SYMBOL TEST CONDITIONS

MIN

TYP

MAX

UNIT

Digital Logic Levels (TTL Levels)

Input LOW level

VIL

0.8

V

Input HIGH level

VIH

2.0

V

Output LOW

VOL

IOL=1mA

0.1 x DVDD

V

Output HIGH

VOH

IOH=1mA

0.9 x DVDD

V

Analogue Reference Levels

Reference voltage

VVMID

Potential divider resistance

RVMID

DAC Performance (Load = 10k Ω, 50pF)

AVDD/2

V

50k

Ω

0dBFs Full scale output voltage

1.0 x

Vrms

AVDD/5

SNR (Note 1,2)

A-weighted,

102

108

dB

@ fs = 48kHz

SNR (Note 1,2)

A-weighted

108

dB

@ fs = 96kHz

Dynamic Range (Note 2)

DNR

A-weighted, -60dB

102

108

dB

full scale input

Total Harmonic Distortion (THD)

1kHz, 0dBFs

-97

-90

dB

DAC channel separation

100

dB

Power Supply Rejection Ratio

PSRR

1kHz 100mVpp

50

dB

20Hz to 20kHz

45

dB

100mVpp

ADC Performance

Input Signal Level (0dB)

1.0 x

Vrms

AVDD/5

SNR (Note 1,2)

A-weighted, 0dB gain

97

102

dB

@ fs = 48kHz

SNR (Note 1,2)

A-weighted, 0dB gain

99

dB

@ fs = 96kHz

64 x OSR

Dynamic Range (note 2)

A-weighted, -60dB

102

dB

full scale input

Total Harmonic Distortion (THD)

1kHz, 0dBFs

-92

dB

1kHz, -1dBFs

-95

-85

dB

ADC Channel Separation

1kHz Input

90

dB

w

PD, Rev 4.2, July 2008

6

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