WM8945ECS/R 데이터 시트보기 (PDF) - Wolfson Microelectronics plc

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WM8945ECS/R

Mono Low-Power CODEC with Video Buffer and Touch Panel Controller

Wolfson Microelectronics plc 

Production Data

PARAMETER

SYMBOL

TEST CONDITIONS

Bypass to Line Output (IN2L to Input PGA to Line Output, 10k / 50pF)

SNR (A-weighted)

PGA Gain = 0dB

INPPGAVOL = 0dB

THD+N

PGA Gain = 0dB

INPPGAVOL = 0dB

MIN

TYP

90

98

-89.5

WM8945

MAX

UNIT

dB

-82

dB

Bypass to Speaker Output (single-ended AUX1, AUX2 to Input PGA to SPKMIX to Speaker Output, 10k / 50pF)

SNR (A-weighted)

PGA Gain = 0dB

90

96

dB

INPPGAVOL = 0dB

THD+N

PGA Gain = 0dB

-86.5

-77

dB

INPPGAVOL = 0dB

DAC Output Path Performance (DAC to Line Output, 10k / 50pF)

Maximum output signal

level (changes in

proportion to LDOVOUT)

SNR (A-weighted)

THD

THD+N

Mute attenuation

PSRR (with respect to

LDOVDD)

217Hz

1kHz

Line Output Resistance

Line Output Capacitance

1

Vrms

85

96

dB

-80

-72

dB

-78

-70

dB

125

dB

48

dB

60

10

k

50

pF

DAC Output Path Performance (DAC to Speaker Output, 10k / 50pF)

Maximum output signal

level (changes in

proportion to LDOVOUT)

SNR (A-weighted)

THD

THD+N

1

Vrms

96

dB

-78

dB

-76

dB

Speaker Output Performance (Speaker Output, 8 BTL)

SNR (A-weighted)

90

96

dB

THD

PO=150mW

0.03

%

-68

dB

PO=350mW

2.944

%

30.6

dB

THD+N

PO=150mW

0.05

%

-66

dB

PO=350mW

3.72

%

-28.6

dB

Mute attenuation

92

dB

PSRR (with respect to

LDOVDD)

217Hz

1kHz

48

dB

60

PSRR (with respect to

SPKVDD)

217Hz

1kHz

89

dB

79

Speaker Resistance

8



Speaker Capacitance

50

pF

w

PD, May 2011, Rev 4.1

11

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