LM4834MS datasheet(3/12 Pages) NSC

3 / 12 page

Electrical Characteristics for Line/Headphone Amplifier

(Notes 1, 2)

The following specifications apply for V

DD = 5V. Limits apply for TA = 25˚C.

Symbol

Parameter

Conditions

LM4834

Units

(Limits)

Typical

(Note 6)

Limit

(Note 7)

Output Power

THD = 0.1%; f = 1kHz; R

L =32Ω

THD=10%;f=1 kHz; R

L =32Ω

THD+N

Total Harmonic Distortion+Noise

OUT =4VP-P,20Hz <f < 20 kHz,

L = 10kΩ,AVD =−1

0.05

PSRR

Power Supply Rejection Ratio

B = 1.0 µF, f =120 Hz,

RIPPLE = 200 mVrms

SNR

Signal to Noise Ratio

DD=5V, POUT=75mW, RL =32Ω,

A-Wtd Filter

102

Electrical Characteristics for Bridged Speaker Amplifer

(Notes 1, 2)

The following specifications apply for V

DD = 5V, unless otherwise noted. Limits apply for TA= 25˚C.

Symbol

Parameter

Conditions

LM4834

Units

(Limits)

Typical

(Note 6)

Limit

(Note 7)

Output Offset Voltage

IN = 0V

mV (max)

Output Power

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

L =8Ω

1.1

1.0

W (min)

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

L =8Ω

1.5

THD+N

Total Harmonic Distortion+Noise

O = 1W, 20 Hz< f < 20 kHz,

L =8Ω,AVD =2

0.3

O = 340 mW, RL =32Ω

1.0

PSRR

Power Supply Rejection Ratio

B = 1.0 µF, f = 120 Hz,VRIPPLE =

200 mVmrs

SNR

Signal to Noise Ratio

DD = 5V, POUT = 1.1W, RL=8Ω,

A-Wtd Filter

Note 1: All voltages are measured with respect to the ground pins, unlessotherwise specified. All specifications are tested using the typical application as shown in

Figure 1.

Note 2:

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditionsfor which the device is func-

tional, but do not guarantee specific performance limits.

Electrical Characteristicsstate DC and AC electrical specifications under particular test conditions which guar-

antee specific performance limits. This assumes that the deviceis 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.

Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA, and the ambient temperature TA. The maximum

allowable power dissipation is PDMAX =(TJMAX −TA)/θJA.For the LM4834MS, TJMAX = 150˚C, and the typical junction-to-ambient thermal resistance, when board

mounted, is 95˚C/W assuming the MSA028CB package.

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).

LM4834MS Datasheet(PDF) 3 Page - National Semiconductor (TI)

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