WM8904 데이터 시트보기 (PDF) - Wolfson Microelectronics plc

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WM8904

Ultra Low Power CODEC for Portable Audio Applications

Wolfson Microelectronics plc 

WM8904

INPUT SIGNAL PATH

Single-ended Stereo Line Record - IN1L+IN1R pins to ADC output

Test conditions:

L_MODE = R_MODE = 00b (Single ended)

LIN_VOL = RIN_VOL = 00101b (0dB)

Total signal path gain = 6dB, incorporating 6dB single-ended to differential conversion gain

PARAMETER

SYMBOL TEST CONDITIONS

MIN

TYP

Full Scale Input Signal Level (for

0.50

ADC 0dBFS).

-6

1.41

Input Resistance

Input Capacitance

Signal to Noise Ratio

Rin

Cin

SNR

A-weighted

9

12

10

80

ADC_OSR128 = 0

ADC_128_OSR_TST_

MODE = 1

ADC_BIASx1P5 = 1

A-weighted

80

90

ADC_OSR128 = 1

ADC_128_OSR_TST_

MODE = 0

ADC_BIASx1P5 = 0

Total Harmonic Distortion + Noise

THD+N

-7dBV input

-78

Channel Separation

1kHz signal, -7dBV

85

10kHz signal, -7dBV

80

Channel Level Matching

1kHz signal, -7dBV

+/-1

Power Supply Rejection Ratio

PSRR

217Hz, 100mVpk-pk

45

1kHz, 100mV pk-pk

55

Pre-Production

MAX

UNIT

Vrms

dBV

Vpk-pk

k

pF

dB

-66

dB

dB

dB

dB

w

PP, Rev 3.3, September 2012

12

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