Electrical Characteristics V

The following specifications apply for V

25˚C. (Continued)

Symbol

Parameter

Conditions

LM4872

Units

(Limits)

Typical

Limit

(Note 6)

(Note 7)

I

SD

Shutdown Current

V

0.01

µA (max)

V

OS

Output Offset Voltage

V

5

mV (max)

P

0

Output Power ( 8

Ω )

Output Power ( 4

Ω )

THD = 0.3% (max);f=1kHz

THD = 0.5% (max);f=1kHz

0.25

0.5

W

W

THD+N

Total Harmonic Distortion+Noise

P

f

≤ 20 kHz

0.25

%

PSRR

Power Supply Rejection Ratio

V

65

dB

Note 1: All voltages are measured with respect to the ground pin, unless otherwise specified.

Note 2:

tional, but do not guarantee specific performance limits.

antee 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.

typical junction-to-ambient thermal resistance is 150˚C/W.

Note 4: Human body model, 100 pF discharged through a 1.5 k

Ω resistor.

Note 5: Machine Model, 220 pF–240 pF discharged through all pins.

Note 6: Typicals are measured at 25˚C and represent the parametric norm.

Note 7: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).

Note 8: Low Voltage Circuit - See Fig. 4

Components

Functional Description

1.

R

i

Inverting input resistance which sets the closed-loop gain in conjunction with R

high pass filter with C

2.

C

i

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

highpass filter with R

for an explanation of how to determine the value of C

3.

R

f

Feedback resistance which sets the closed-loop gain in conjunction with R

4.

C

S

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.

C

B

Bypass pin capacitor which provides half-supply filtering. Refer to the section, Proper Selection of External

Components, for information concerning proper placement and selection of C

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