Electrical Characteristics DV

(Notes 1, 2, 8) (Continued)

The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T

Symbol

Parameter

Conditions

LM4930

Units

(Limits)

Typical

(Note 6)

Limits

(Notes 7,

15)

V

MIC_BIAS

Mic Bias Voltage

2.0

V

THD+N

Headphone Amplifier Total

Harmonic Motion Distortion +

Noise

f

Ω Stereo

Load

0.07

%

P

OHP

Headphone Amplifier Output

Power

THD+N = 0.5%, f

27

20

mW (min)

P

OLS

Mono Speaker Amplifier Output

Power

THD+N = 3%, f

1

W

PSRR

Power Supply Rejection Ratio

C

C

V

MIC_N terminated with 10

Ω to ground

55

45

dB (min)

SNR

(Voice)

Signal-to-Noise Ratio

(Voice Audio Path)

32

Ω Stereo Load; Noise = digital zero,

A-weighted, 0dB gain setting

72

dB

SNR

(Music)

Signal-to-Noise Ratio (Music

Audio Path)

32

Ω Stereo Load; Noise = digital zero,

A-weighted; 0dB gain setting

86

dB

DR

(Voice)

Dynamic Range (Voice Audio

Path)

32

Ω Stereo Load; Noise for -60dBFS

digital input; A-weighted; 0dB gain setting

72

dB

DR

(Music)

Dynamic Range (Music Audio

Path)

Ω

Stereo Load; Noise for -60dBFS digital

input; A-weighted, 0dB gain setting

86

dB

SNR

ADC

Signal-to-Noise Ratio

(Voice ADC Path)

Reference signal = 0dBFS

MIC_P, MIC_N terminated with 10

Ω to

ground;

A-weighted; 47dB MIC preamp gain

setting

75

dB

DR

ADC

Dynamic Range

(Voice ADC Path)

Reference signal = 0dBFS

Noise for -60dBFS digital input;

A-weighted; 47dB MIC preamp gain

setting

75

dB

X

TALK

Stereo Channel-to-Channel

Crosstalk

f

-3dB

FS

75

dB

V

MIC-IN

Maximum Differential MIC Input

Voltage

17dB MIC Preamp gain setting

570

mV

P-P

R

VDAC

Voice DAC Ripple

300Hz - 3.3kHz through head-phone

output.

+/-0.15

+/-0.2

dB (max)

R

VADC

Voice ADC Ripple

300Hz - 3.3kHz through head-phone

output.

+/-0.25

+/-0.3

dB (max)

PB

VDAC

Voice DAC Passband

-3dB Point

3.46

kHz

SBA

VDAC

Voice DAC Stopband Attenuation

Above 4kHz

72

dB

UPB

VADC

Voice ADC Upper Passband

Cutoff Frequency.

Upper -3dB Point

3.47

kHz

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