LM4995, LM4995TMBD

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SNAS329F – APRIL 2006 – REVISED NOVEMBER 2009

(1) (2)

LM4995

Units

Symbol

Parameter

Conditions

Typical

Limit

(Limits)

(3)

1.3

mA

DD

Quiescent Power Supply Current

1.6

mA

Shutdown Current

0.01

µA

Output Offset Voltage

No Load

5

mV

Output Power

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

400

mW

Wake-up time

110

ms

THD+N

Total Harmonic Distortion + Noise

0.07

%

74 (f = 217Hz)

PSRR

Power Supply Rejection Ratio

dB

Input terminated to GND

75 (f = 1kHz)

Shutdown Voltage Input High

1.2

V

Shutdown Voltage Input Low

1

V

(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 guarantee specific performance limits. Electrical Characteristics state DC and AC electrical

specifications under particular test conditions which guarantee specific performance limits. This assumes that the device is within the

Operating Ratings. Specifications are not guaranteed 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 guaranteed to National's AOQL (Average Outgoing Quality Level).

(5)

Datasheet min/max specification limits are guaranteed 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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