LM4930 datasheet(10/40 Pages) TI1

Teilenummer	LM4930

Bauteilbeschribung	Audio Power Amplifier Series Audio Subsystem with Stereo Headphone & Mono Speaker Amplifiers

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Hersteller	TI1 [Texas Instruments]

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LM4930

SNAS212C – JULY 2003 – REVISED MAY 2013

www.ti.com

Electrical Characteristics DVDD = 3.3V, AVDD = 5V, RLHP = 32Ω, RLHF = 8Ω

(1)(2)(3) (continued)

The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for TA= 25°C.

LM4930

Units

Parameter

Test Conditions

(Limits)

Typ(4)

Limits(5)(6)

SNR

Signal-to-Noise Ratio

Signal = Vo at f = 1kHz @1% THD+N, 32

Ω

72

dB

(Voice)

(Voice DAC Path)

Stereo Load; Noise = digital zero, A-

weighted, 0dB gain setting

SNR

Signal-to-Noise Ratio (Music Audio

Signal = Vo at f = 1kHz @1% THD+N, 32

Ω

86

dB

(Music)

Path)

Stereo Load; Noise = digital zero, A-

weighted; 0dB gain setting

DR

Dynamic Range (Voice DAC Path)

Signal = Vo at f = 1kHz @1% THD+N, 32

Ω

72

dB

(Voice)

Stereo Load; Noise for -60dBFS digital input;

A-weighted; 0dB gain setting

DR

Dynamic Range (Music Audio Path)

Signal = Vo at f=1kHz @1% THD+N, 32

Ω

86

dB

(Music)

Stereo Load; Noise for -60dBFS digital input;

A-weighted, 0dB gain setting

SNRADC

Signal-to-Noise Ratio

Reference signal = 0dBFS

75

dB

(Voice ADC Path)

MIC_P, MIC_N terminated with 10

Ω to

ground;

A-weighted; 47dB MIC preamp gain setting

DRADC

Dynamic Range

Reference signal = 0dBFS

75

dB

(Voice ADC Path)

Noise for -60dBFS digital input;

A-weighted; 47dB MIC preamp gain setting

XTALK

Stereo Channel-to-Channel

fS = 48kHz, fIN = 1kHz sinewave at -3dBFS

75

dB

Crosstalk

VMIC-IN

Maximum Differential MIC Input

17dB MIC Preamp gain setting

570

mVP-P

Voltage

RVDAC

Voice DAC Ripple

300Hz - 3.3kHz through head-phone output.

+/-0.15

+/-0.2

dB (max)

RVADC

Voice ADC Ripple

300Hz - 3.3kHz through head-phone output.

+/-0.25

+/-0.3

dB (max)

PBVDAC

Voice DAC Passband

-3dB Point

3.46

kHz

SBAVDAC Voice DAC Stopband Attenuation

Above 4kHz

72

dB

UPBVADC Voice ADC Upper Passband Cutoff

Upper -3dB Point

3.47

kHz

Frequency.

LPBVADC

Voice ADC Lower Passband Cutoff

Lower -3dB Point

0.230

kHz

Frequency.

SBAVADC Voice ADC Stopband Attenuation

Above 4kHz

65

dB

SBANOTC Voice ADC Notch Attenuation

Centered on 55Hz, figure gives worst case

58

dB

H

attenuation for 50Hz & 60Hz.

RDAC

Audio DAC Ripple

20Hz - 20kHz through head-phone output.

+/-0.1

+/-0.2

dB (max)

PBDAC

Audio DAC Passband Width

-3dB point

22.7

kHz

SBADAC

Audio DAC Stopband Attenuation

Above 24kHz

76

dB

DRDAC

Audio DAC Dynamic Range Digital

Signal = VO at f = 1kHz @ 1% THD+N;

97

dB

Filter Section

f = 1kHz; Noise for -60dBFS digital input;

0dB gain; A-weighted

SNRDAC

Audio DAC SNR Digital Filter

Signal = VO at f = 1kHz @ 1% THD+N;

97

dB

Section

f = 1kHz; Noise for -60dBFS digital input;

0dB gain; A-weighted

ΔACH-CH

Stereo Channel-to-Channel Gain

0.3

dB

Mismatch

VIL

Digital Input: Logic Low Voltage

0.4

V

Level

VIH

Digital Input: Logic High Voltage

1.4

V

Level

Volume Control Range (Headphone

Maximum Attenuation

-46.5

dB

amplifiers)

Minimum Attenuation

0

dB

Volume Control Range (Mono

Minimum Gain

-34.5

dB

speaker amplifier)

Maximum Gain

12

dB

10

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