WM8785_06 datasheet(6/31 Pages) WOLFSON

부품명	WM8785

상세설명	24-Bit, 192kHz Stereo ADC

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제조업체	WOLFSON [Wolfson Microelectronics plc]

홈페이지	http://www.wolfsonmicro.com

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WM8785

Production Data

w

PD Rev 4.1 December 2006

6

ELECTRICAL CHARACTERISTICS

Test Conditions

DVDD = 3.3V, AVDD = 5.0V, TA = +25

oC, 1kHz signal, A-weighted, fs = 48kHz, MCLK = 256fs, 24-bit audio data, Slave Mode

unless otherwise stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ADC Performance

Full Scale Input Signal Level

(for ADC 0dB Input)

2.0

Vrms

Input resistance

10

k

Ω

Input capacitance

10

pF

A-weighted,

@ fs = 48kHz

102

111

dB

Signal to Noise Ratio (Note

1,2,4)

SNR

Unweighted,

@ fs = 48kHz

108

dB

A-weighted,

@ fs = 96kHz

111

dB

Signal to Noise Ratio (Note

1,2,4)

SNR

Unweighted,

@ fs = 96kHz

108

dB

A-weighted,

@ fs = 192kHz

111

dB

Signal to Noise Ratio (Note

1,2,4)

SNR

Unweighted,

@ fs = 192kHz

108

dB

1kHz, -0.1dB Full Scale

@ fs = 48kHz

-102

-92

dB

1kHz, -0.1dB Full Scale

@ fs = 96kHz

-102

dB

Total Harmonic Distortion

THD

1kHz, -0.1dB Full Scale

@ fs = 192kHz

-102

dB

Total Harmonic Distortion

THD

1kHz, -0.1dB Full Scale

@ fs = 48kHz

0.0008

0.0025

%

1kHz, -0.1dB Full Scale

@ fs = 96kHz

0.0008

%

1kHz, -0.1dB Full Scale

@ fs = 192kHz

0.0008

%

Dynamic Range

DNR

-60dBFS

102

111

dB

Channel Level Matching

20kHz signal

0.1

dB

1kHz 100mVpp, applied

to AVDD, DVDD

50

dB

Power Supply Rejection Ratio

PSRR

20Hz to 20kHz

100mVpp

45

dB

Digital Logic Levels (CMOS Levels)

Input LOW level

VIL

0.3 x DVDD

V

Input HIGH level

VIH

0.7 x DVDD

V

Input leakage current

-1

±0.2

+1

µA

Input capacitance

5

pF

Output LOW

VOL

IOL=1mA

0.1 x DVDD

V

Output HIGH

VOH

IOH= -1mA

0.9 x DVDD

V

Analogue Reference Levels

Midrail Reference Voltage

VMID

AVDD to VMID and

VMID to VREFGND

–3%

AVDD/2

+3%

V

Potential Divider Resistance

RVMID

AVDD to VMID and

VMID to GND

50

k

Ω

Buffered Reference Voltage

VREF

–3%

0.8 x AVDD

+3%

V

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