LM4881MSLASHNOPB datasheet(4/15 Pages) TI

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LM4881

SNAS001D – SEPTEMBER 1997 – REVISED MAY 2013

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Electrical Characteristics

(1)(2) (continued)

The following specifications apply for VDD = 5V unless otherwise specified. Limits apply for TA = 25C.

Symbol

Parameter

Conditions

LM4881

Units

(Limits)

Typ(3)

Limit(4)

P O

Output Power

THD = 0.1% (max); f = 1 kHz;

RL = 8Ω

200

125

mW (min)

RL = 16Ω

150

RL = 32Ω

THD + N = 10%; f = 1 kHz;

RL = 8Ω

300

RL = 16Ω

200

RL = 32Ω

110

THD+N

Total Harmonic Distortion + Noise

RL = 16Ω, P O = 120 mWrms;

0.025

R L = 32Ω, PO = 75 mWrms; f = 1

0.02

kHz

PSRR

CB = 1.0 µF, VRIPPLE = 200 mVrms, f

= 120Hz

IDD

Quiescent Current

VIN = 0V, IO = 0A

1.1

ISD

Shutdown Current

VPIN1 = VDD

0.7

µA

VOS

Offset Voltage

VIN = 0V

P O

Output Power

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

RL = 8Ω

RL= 16Ω

RL = 32Ω

THD + N = 10%; f = 1 kHz;

RL = 8Ω

RL = 16Ω

RL = 32Ω

THD+N

Total Harmonic Distortion + Noise

RL = 16Ω, P O = 60 mWrms;

0.2

RL = 32Ω, PO = 25 mWrms; f = 1 kHz

0.03

PSRR

Power Supply Rejection Ratio

CB = 1.0 µF, VRIPPLE = 200 mVrms, f

= 100 Hz

External Components Description

(Figure 1)

Components

Functional Description

1. Ri

Inverting input resistance which sets the closed-loop gain in conjuction with Rf. This resistor also forms a

high pass filter with Ci at fc = 1 / (2πR iCi).

2. Ci

Input coupling capacitor which blocks the DC voltage at the amplifier's input terminals. Also creates a

highpass filter with Ri at fc = 1 / (2πRiC i). Refer to the section, Proper Selection of External Components,

for an explanation of how to determine the value of Ci.

3. Rf

Feedback resistance which sets closed-loop gain in conjuction with Ri.

4. CS

Supply bypass capacitor which provides power supply filtering. Refer to the Application Information section

for proper placement and selection of the supply bypass capacitor.

5. CB

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 CB.

6. CO

Output coupling capacitor which blocks the DC voltage at the amplifier's output. Forms a high pass filter

with RL at fO = 1/(2πRLCO)

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