WM8788 データシートの表示（PDF） - Wolfson Microelectronics plc

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WM8788

High Performance 24-bit Stereo ADC

Wolfson Microelectronics plc 

WM8788

Preliminary Technical Data

ELECTRICAL CHARACTERISTICS

Test Conditions

AVDD = REFVDD = 3.3V, AGND = 0V, TA = +25oC, 1kHz signal, fs = 48kHz, MCLK = 256fs unless otherwise stated.

Implemented recommended calibration start-up sequence as detailed in Calibrated Start-Up section.

PARAMETER

SYMBOL

TEST CONDITIONS

Analogue Inputs (INL, INR)

Maximum input signal

level

RIN = RFB = 2kΩ

Input capacitance

ADC Input Path Performance (Analogue Input to ADC)

Signal to Noise Ratio

SNR

A-weighted, fs = 48kHz

Unweighted, fs = 48kHz

A-weighted, fs = 96kHz

Unweighted, fs = 96kHz

Total Harmonic

Distortion

THD

-1dBFS input, Master Mode

-1dBFS input, Slave Mode

Dynamic range

-60dBFS input

Channel separation

20Hz to 20kHz

Channel level matching

Channel phase deviation

Power Supply Rejection

Ratio (with respect to

AVDD)

PSRR

1kHz 100mV pk-pk applied to

AVDD

Digital Inputs / Outputs

Input high level

Input low level

Output high level

Output low level

Input capacitance

IOL = 1mA

IOH = -1mA

Input leakage

Clocking

MCLK frequency

Analogue Reference Levels

Midrail Reference

Voltage

VMID

VMID resistance to

Ground

RVMID

Current Consumption

AVDD current

consumption

IAVDD

Quiescent

fs = 48kHz, MCLK = 256fs

Quiescent

fs = 96kHz, MCLK = 256fs

Quiescent

No clocks applied

MIN

TYP

MAX

AVDD/3.3

20

106

103

106

103

-91

-88

106

100

0.1

0.1

50

0.7 x AVDD

0.3 x AVDD

0.9 x AVDD

0.1 x AVDD

5

-1

1

2.048

36.864

-4%

AVDD/2

+4%

35

84

88

1

UNIT

Vrms

pF

dB

dB

dB

dB

dB

degree

dB

V

V

V

V

pF

μA

MHz

V

kΩ

mA

w

PTD, December 2010, Rev 2.2

6

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