LM4954

SNAS292B – JUNE 2005 – REVISED APRIL 2013

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Electrical Characteristics VDD = 7V

(1) (2)

The following specifications apply for VDD = 7V, AV-BTL = 6dB, and RL = 8Ω unless otherwise specified. Limits apply for TA =

25°C.

LM4954

Units

Symbol

Parameter

Conditions

(Limits)

Typical(3)

Limit(4)(5)

IDD

Quiescent Power Supply Current

VIN = 0V, RL = 8Ω BTL

3

5

mA (max)

ISD

Shutdown Current

VSD = GND

(6)

0.01

1

µA (max)

VOS

Output Offset Voltage

10

25

mV (max)

THD+N = 1% (max); f = 1kHz

2.4

2.2

W (min)

Po

Output Power(7)

THD+N = 10% (max); f = 1kHz

3.0

W

PO = 1Wrms; f = 1kHz

0.1

%

AV-BTL = 6dB

THD+N

Total Harmonic Distortion + Noise

PO = 1Wrms; f = 1kHz

0.4

%

AV-BTL = 26dB

VRipple = 200mVsine p-p,

CB = 2.2µF, Input terminated

71

54

dB (min)

with 10

Ω to GND

fRipple = 217Hz, Input Referred

PSRR

Power Supply Rejection Ratio

VRipple = 200mVsine p-p,

CB = 2.2µF, Input terminated

71

55

dB (min)

with 10

Ω to ground

fRipple = 1kHz, Input Referred

VSDIH

Shutdown High Input Voltage

1.2

V (min)

VSDIL

Shutdown Low Input Voltage

0.4

V (max)

TWU

Wake-up Time

CB = 2.2µF

130

ms

A-Wtg, AV-BTL = 6dB

Input terminated with 10

Ω to GND,

20

µVRMS

Output Referred

∈OUT

Output Noise

A-Wtg, AV-BTL = 26dB

Input terminated with 10

Ω to GND,

100

µVRMS

Output Referred

RPD

Pull Down Resistor on Shutdown

75

k

Ω

(1)

All voltages are measured with respect to the ground pin, unless otherwise specified.

(2)

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.

(3)

Typical specifications are specified at 25°C and represent the parametric norm.

(4)

Tested limits are specified to Texas Instruments' AOQL (Average Outgoing Quality Level).

(5)

Datasheet min/max specification limits are specified by design, test, or statistical analysis.

(6)

Shutdown current is measured in a normal room environment. Exposure to direct sunlight in the TL package will increase ISD by a

minimum of 2

μA.

(7)

The demo board shown has 1.1in2 (710mm2) heat spreading planes on the two internal layers and the bottom layer. The bottom internal

layer is electrically VDD while the top internal and bottom layers are electrically GND. Thermal performance for the demo board is found

on the Power Derating graph in the Typical Performance Characteristics section. 7V operation requires heat spreading planes for the

thermal stability.

4

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