LM4947 datasheet(4/32 Pages) NSC

Part #	LM4947

Description	Mono Class D and Stereo Audio Subsystem with OCL Headphone Amplifier and National 3D

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Manufacturer	NSC [National Semiconductor (TI)]

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Absolute Maximum Ratings (Note 2)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Supply Voltage

6.0V

Storage Temperature

−65˚C to +150˚C

Input Voltage

−0.3 to V

DD +0.3

ESD Susceptibility (Note 3)

2.0kV

ESD Machine model (Note 6)

200V

Junction Temperature (T

J)

150˚C

Solder Information

Vapor Phase (60 sec.)

215˚C

Infrared (15 sec.)

220˚C

Thermal Resistance

θ

JA (typ) - TLA25CBA

65˚C/W

Operating Ratings

Temperature Range

−40˚C to 85˚C

Supply Voltage (V

DD)

2.7V

≤ V

DD

≤ 5.5V

Supply Voltage (I

2C)

2.2V

≤ V

DD

≤ 5.5V

Supply Voltage (Loudspeaker V

DD)

2.7V

≤ V

DD

≤ 5.5V

Electrical Characteristics 3.3V (Notes 2, 7)

The following specifications apply for V

DD = 3.3V, TA = 25˚C, and all gains are set for 0dB unless otherwise specified.

Symbol

Parameter

Conditions

LM4947

Units

(Limits)

Typical

(Note 4)

Limits

(Note 5)

I

DDQ

Quiescent Supply Current

Output Modes 2, 4, 6

V

IN = 0V; No load,

OCL = 0 (Table 2)

4.5

6.5

mA (max)

Output Modes 1, 3, 5, 7

V

IN = 0V; No load, BTL,

OCL = 0 (Table 2)

6.5

8

mA (max)

I

SD

Shutdown Current

Output Mode 0

0.1

1

µA (max)

V

OS

Output Offset Voltage

V

IN = 0V, Mode 7, Mono

2

15

mV (max)

V

IN = 0V, Mode 7, Headphones

2

15

P

O

Output Power

MONO

OUT;RL =8

Ω

THD+N = 1%; f = 1kHz, BTL, Mode 1

500

400

mW (min)

R

OUT and LOUT;RL =32

Ω

THD+N = 1%; f = 1kHz, SE, Mode 4

37

33

mW (min)

THD+N

Total Harmonic Distortion Plus

Noise

MONO

OUT

f = 1kHz, P

OUT = 250mW;

R

L =8

Ω, BTL, Mode 1

0.03

%

R

OUT and LOUT

f = 1kHz, P

OUT = 12mW;

R

L =32

Ω, SE, Mode 4

0.02

%

N

OUT

Output Noise

A-weighted, 0dB

inputs terminated, output referred

Speaker; Mode 1

39

µV

Speaker; Mode 3

39

µV

Speaker; Mode 5

42

µV

Speaker; Mode 7

38

µV

Headphone; SE, Mode 2

15

µV

Headphone; SE, Mode 4

15

µV

Headphone; SE, Mode 6

17

µV

Headphone; OCL, Mode 2

12

µV

Headphone; OCL, Mode 4

15

µV

Headphone; OCL, Mode 6

17

µV

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