LM3876 datasheet(3/19 Pages) NSC

3 / 19 page

Absolute Maximum Ratings (Notes 4, 5)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Supply Voltage |V

+|+|V−| (No Signal)

94V

Supply Voltage |V

+|+|V−| (Input Signal)

84V

Common Mode Input Voltage

+ or V−) and

+|+|V−|

≤80V

Differential Input Voltage

60V

Output Current

Internally Limited

Power Dissipation (Note 6)

125W

ESD Susceptibility (Note 7)

3000V

Junction Temperature (Note 8)

150˚C

Soldering Information

T Package (10 seconds)

260˚C

Storage Temperature

−40˚C to +150˚C

Thermal Resistance

1˚C/W

43˚C/W

Operating Ratings (Notes 4, 5)

Temperature Range

MIN ≤ TA ≤ TMAX

−20˚C

≤ T

A ≤ +85˚C

Supply Voltage |V

+|+|V−|

24V to 84V

Note 1: Operation is guaranteed up to 84V, however, distortion may be intro-

duced from SPiKe Protection Circuitry when operating above 70V if proper

thermal considerations are not taken into account. Refer to the Thermal

Considerations section for more information.

(See SPiKe Protection Response)

Electrical Characteristics (Notes 4, 5)

The following specifications apply for V

+ = +35V, V− = −35V, I

MUTE = −0.5 mA with RL = 8Ω unless otherwise specified. Limits

apply for T

A = 25˚C.

Symbol

Parameter

Conditions

LM3876

Units

(Limits)

Typical

Limit

(Note 9) (Note 10)

+|+|V−|

Power Supply Voltage (Note 13)

pin7 −V

−

≥ 9V

V (min)

V (max)

Mute Attenuation

Pin 8 Open or at 0V, Mute: On

Current out of Pin 8 > 0.5 mA,

120

dB (min)

Mute: Off

(Note 3)

Output Power (Continuous Average)

THD + N = 0.1% (max)

W (min)

f = 1 kHz; f = 20 kHz

Peak P

Instantaneous Peak Output Power

100

THD + N

Total Harmonic Distortion Plus Noise

40W, 20 Hz

≤ f ≤ 20 kHz

0.06

V = 26 dB

(Note 3)

Slew Rate (Note 12)

IN = 1.2 Vrms, f = 10 kHz,

V/µs

(min)

Square-Wave, R

L = 2kΩ

+ (Note 2)

Total Quiescent Power Supply

Current

CM = 0V, Vo = 0V, Io = 0A, Imute = 0A

mA (max)

(Note 2)

Input Offset Voltage

CM = 0V, Io = 0 mA

mV (max)

Input Bias Current

CM = 0V, Io = 0 mA

0.2

µA (max)

Input Offset Current

CM = 0V, Io = 0 mA

0.01

0.2

µA (max)

Output Current Limit

+| = |V−| = 12V, t

ON = 10 ms, VO = 0V

A (min)

(Note 2)

Output Dropout Voltage (Note 14)

+–V

O|, V

+ = 20V, I

o = +100 mA

1.6

V (max)

O–V

−|, V− = −20V, I

o = −100 mA

2.7

V (max)

PSRR

(Note 2)

Power Supply Rejection Ratio

+ = 40V to 20V, V− = −40V,

120

dB (min)

CM = 0V, Io = 0mA

+ = 40V, V− = −40V to −20V,

120

dB (min)

CM = 0V, Io = 0mA

CMRR

(Note 2)

Common Mode Rejection Ratio

+ = 60V to 20V, V− = −20V to −60V,

120

dB (min)

CM = 20V to −20V, Io = 0mA

VOL

(Note 2)

Open Loop Voltage Gain

+| = |V−| = 40V, R

L = 2kΩ, ∆VO = 60V

120

dB (min)

GBWP

Gain-Bandwidth Product

+| = |V−| = 40V

MHz

(min)

O = 100 kHz, VIN = 50 mVrms

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