LM4947, LM4947TLEVAL

SNAS349D – JUNE 2006 – REVISED MAY 2013

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ELECTRICAL CHARACTERISTICS 5V

(1)(2) (continued)

The following specifications apply for VDD = 5V, TA = 25°C and all gains are set for 0dB unless otherwise specified.

Symbol

Parameter

Conditions

LM4947

Units

(Limits)

Typical(3)

Limits(4)

VRIPPLE = 200mVPP; f = 217Hz,

RL = 8Ω, CB = 2.2µF, BTL

All audio inputs terminated to GND;

output referred

Power Supply Rejection Ratio

BTL, Output Mode 1

70

dB

Loudspeaker out

BTL, Output Mode 3

61

dB

BTL, Output Mode 5

64

dB

BTL, Output Mode 7

61

dB

VRIPPLE = 200mVPP; f = 217Hz,

PSRR

RL = 32Ω, CB = 2.2µF, BTL

All audio inputs terminated to GND;

output referred

SE, Output Mode 2

72

dB

Power Supply Rejection Ratio

SE, Output Mode 4

70

dB

ROUT and LOUT

SE, Output Mode 6

65

dB

OCL, Output Mode 2

76

dB

OCL, Output Mode 4

72

dB

OCL, Output Mode 6

70

dB

η

Class D Efficiency

Output Mode 1, 3, 5

86

%

f = 1kHz, VCM = 1Vpp, 0dB gain,

CMRR

Common-Mode Rejection Ratio

–49

dB

Mode 1, BTL, RL = 8Ω

Headphone, PO = 30mW, f = 1kHz,

–55

dB

OCL, Mode 4

XTALK

Crosstalk

Headphone, PO = 30mW, f = 1kHz,

–72

dB

SE, Mode 4

CB = 2.2μF, OCL, RL = 32Ω

116

ms

TWU

Wake-Up Time from Shutdown

CB = 2.2μF, SE, RL = 32Ω

150

ms

Volume Control Step Size Error

±0.2

dB

Input referred maximum attenuation

-59.5

dB

Digital Volume Range

Input referred maximum gain

+18

dB

Mute Attenuation

Output Mode 1, 3, 5

90

dB (min)

k

Ω (min)

Maximum gain setting

11

k

Ω (max)

MONO_IN Input Impedance

RIN and LIN Input Impedance

k

Ω (min)

Maximum attenuation setting

100

k

Ω (max)

8

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