LM4940

SNAS219C – OCTOBER 2003 – REVISED MAY 2013

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ELECTRICAL CHARACTERISTICS VDD = 12V

(1) (2)

The following specifications apply for VDD = 12V, AV = 10, RL = 4Ω, f = 1kHz unless otherwise specified. Limits apply for TA =

25°C.

LM4940

Units

Symbol

Parameter

Conditions

(Limits)

Typical(3)

Limit(4)(5)

IDD

Quiescent Power Supply Current

VIN = 0V, IO = 0A, No Load

16

40

mA (max)

ISD

Shutdown Current

VSHUTDOWN = GND

(6)

40

100

µA (max)

2.0

V (min)

VSDIH

Shutdown Voltage Input High

VDD/2

V (max)

VSDIL

Shutdown Voltage Input Low

0.4

V (max)

Single Channel

THD+N = 1%

3.1

2.8

PO

Output Power

W (min)

THD+N = 10%

4.2

VDD = 14.4V, THD+N = 10%

6.0

THD+N

Total Harmomic Distortion + Noise

PO = 1WRMS, AV = 10, f = 1kHz

0.15

%

A-Weighted Filter, VIN = 0V,

εOS

Output Noise

10

µV

Input Referred

XTALK

Channel Separation

PO = 1W

70

dB

VRIPPLE = 200mVp-p

PSRR

Power Supply Rejection Ratio

56

dB

fRIPPLE = 1kHz

(1)

All voltages are measured with respect to the GND 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 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)

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

(4)

Limits are specified to 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. The Shutdown pin should be driven as close as possible to GND for

minimum shutdown current.

TYPICAL APPLICATION

Figure 2. Typical Stereo Audio Amplifier Application Circuit

4

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