LM4931ITLSLASHNOPB datasheet(5/50 Pages) TI2

5 / 50 page

LM4931

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SNAS251E – APRIL 2004 – REVISED MAY 2013

Electrical Characteristics DVDD = 3V, AVDD = 3V, RLHP = 32Ω, RLHF = 8Ω

(1)(2) (continued)

The following specifications apply for the circuit shown in Figure 62, unless otherwise specified. Limits apply for TA = 25°C.

Symbol

Parameter

Conditions

LM4931

Units

(Limits)

Typical(3

Limits(4)

)

No Load

Mode 2

7.8

mA (max)

Mode 3

5.3

mA (max)

Mode 4

8.6

mA (max)

Analog Power Supply Quiescent

AIDD

Current

Mode 5

8.4

mA (max)

Mode 6

6.0

mA (max)

Mode 7

9.2

mA (max)

Mode 8, 9, 10

10.1

mA (max)

Loudspeaker Amplifier

VFS

Full-Scale Output Voltage

Ω load, 0dB gain setting

2.6

VP-P

Loudspeaker Amplifier)

THD+N

Total Harmonic Distortion + Noise

fOUT = 1kHz, POUT = 200mW

0.4

POLS

Loudspeaker Amplifier Output Power

THD = 1% (max), fOUT = 1kHz

470

350

mW (min)

CB = 1.0μF

Power Supply Rejection Ratio

PSRR

VRIPPLE = 200mVP-P

(Loudspeaker Amplifier)

fRIPPLE = 217Hz

SNR (Voice)

Signal-to-Noise Ratio of Voice

Signal = VO at 0dBFS, f = 1kHz,

Channel (Loudspeaker Amplifier)

Noise = digital zero, A-weighted,

0dB gain setting(6)

fMCLK = 12.288MHz, PLL disabled

fMCLK = 12MHz, PLL active

Signal = VO at 0dBFS, f = 1kHz,

Noise = digital zero, A-weighted,

Signal-to-Noise Ratio of Music

0dB gain setting(6)

SNR (Music)

Channel (Loudspeaker Amplifier)

Output Noise

fMCLK = 12.288MHz, PLL disabled

fMCLK = 12MHz, PLL active

A-weighted filter, Vin = digital zero

(7)

eN (Music)

Output Noise

fMCLK = 12.288MHz, PLL disabled

120

μV

fMCLK = 12MHz, PLL active

140

μV

VOS

Offset Voltage

Minimum Gain

–34.5

Volume Control Range (Loudspeaker

VCR

Amplifier)

Maximum Gain

Volume Control Step Size

1.5

(Loudspeaker Amplifier)

Headphone Amplifier

VFS

Full Scale Ouput Voltage

Ω load, 0dB gain setting

2.6

VP-P

(Headphone Amplifier)

THD+N

Total Harmonic Distortion + Noise

fIN = 1kHz, POUT = 7.5mW,

0.04

(Headphone Amplifier)

Ω stereo load

POHP

Output Power (Headphone Amplifier)

THD = 0.5%, fOUT = 1KHz

mW (min)

PSRR

Power Supply Rejection Ratio

CB = 1.0μF

(Headphone Amplifier)

VRIPPLE = 200mVPP

fRIPPLE = 217Hz

(6)

Disabling or bypassing the PLL will result in an improvement in noise measurements.

(7)

Disabling or bypassing the PLL will result in an improvement in noise measurements.

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