LM4931

SNAS251E – APRIL 2004 – REVISED MAY 2013

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

(1) (2)

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

Symbol

Parameter

Conditions

LM4931

Units

(Limits)

Typical(3 Limits(4)

)

Power

Mode 0

DISD

Digital Shutdown Current

fMCLK = 12MHz

(5)

500

600

μA (max)

No MCLK

1

μA (max)

DIST

Digital Standby Current

Mode 1, fMCLK = 12MHz

500

1600

μA (max)

fMCLK = 12MHz

Mode 2, 3, 4

1.6

3.5

mA (max)

DIDD

Digital Power Supply Current

Mode 5, 6, 7

3.5

8

mA (max)

Mode 8, 9, 10

4.0

8

mA (max)

PLLIDD

PLL Quiescent Current

fMCLK = 12MHz

3.3

4

mA (max)

AIDD

Analog Shutdown Current

Mode 0, No Load

0.6

3

μA (max)

AIST

Analog Standby Current

Mode 1, No Load

220

450

μA (max)

No Load

Mode 2

18.5

32

mA (max)

Mode 3

7.3

12

mA (max)

Mode 4

19.6

29

mA (max)

Analog Power Supply Quiescent

AIDD

Current

Mode 5

19.4

30

mA (max)

Mode 6

8.4

26

mA (max)

Mode 7

20.5

30

mA (max)

Mode 8, 9, 10

22

32

mA (max)

Loudspeaker Amplifier

VFS

Full-Scale Output Voltage (Mono

8

Ω load, 0dB gain setting

2.6

VP-P

speaker amplifie)r

THD+N

Total Harmonic Distortion + Noise

fOUT = 1kHz, POUT = 400mW

0.16

%

POLS

Loudspeaker Amplifier Output Power

THD = 1%, fOUT = 1kHz

1.1

W

PSRR

Power Supply Rejection Ratio

CB = 1.0µF

56

dB

(Loudspeaker Amplifier)

VRIPPLE = 200mVPP

fRIPPLE = 217Hz

Signal = VO at 0dBFS, f = 1kHz

Noise = digital zero, A-weighted

Signal-to-Noise Ratio of Voice

0dB gain setting(6)

SNR (Voice)

Channel (Loudspeaker Amplifier)

fMCLK = 12.288MHz, PLL disabled

70

dB

fMCLK = 12MHz, PLL active

69

dB

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)

fMCLK = 12.288MHz, PLL disabled

74

dB

fMCLK = 12MHz, PLL active

73

dB

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for

which the device is functional but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical

specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the

Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication

of device performance.

(2)

All voltages are measured with respect to the relevant GND pin unless otherwise specified. All grounds should be coupled as close as

possible to the device.

(3)

Typicals are measured at 25°C and represent the parametric norm.

(4)

Limits are ensured to TI’s AOQL (Average Outgoing Quality Level).

(5)

Digital shutdown current is measured with system clock set for PLL output while the PLL is disabled.

(6)

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

8

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