LM4992, LM4992SDBD

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SNAS220B – NOVEMBER 2003 – REVISED MAY 2013

(1) (2)

LM4992

Units

Symbol

Parameter

Conditions

(Limits)

4.0

mA (max)

Quiescent Power Supply Current

6.0

mA (max)

Shutdown Current

0.02

2.0

µA (max)

Shutdown Voltage Input High

1.2

V

Shutdown Voltage Input Low

1.0

V

Output Offset Voltage

5

30

mV (max)

Output Power

THD = 1% (max); f = 1 kHz, per

240

mW (min)

channel

Wake-up time

70

ms

THD+N

Total Harmonic Distortion+Noise

0.1

%

Xtalk

Crosstalk

80

dB

51 (f = 217Hz)

PSRR

Power Supply Rejection Ratio

dB (min)

Input terminated with 10

Ω

51 (f = 1kHz)

(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)

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

(4)

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

(5)

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

External Components Description

(Figure 1)

Components

Functional Description

1.

2.

Input coupling capacitor which blocks the DC voltage at the amplifiers input terminals. Also creates a highpass filter with

3.

4.

Supply bypass capacitor which provides power supply filtering. Refer to the POWER SUPPLY BYPASSING section for

information concerning proper placement and selection of the supply bypass capacitor.

5.

Bypass pin capacitor which provides half-supply filtering. Refer to the section, PROPER SELECTION OF EXTERNAL

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