MAX98355B datasheet(5/34 Pages) MAXIM

Part #	MAX98355B

Description	PCM Input Class D Audio Power Amplifiers

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Manufacturer	MAXIM [Maxim Integrated Products]

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MAX98355A/MAX98355B

PCM Input Class D Audio Power Amplifiers

5

Maxim Integrated

ELECTRICAL CHARACTERISTICS (continued)

(VDD = 5V, VGND = 0V, GAIN = VDD (+6dB). BCLK = 3.072MHz, LRCLK = 48kHz, speaker loads (ZSPK) connected between OUTP

and OUTN, ZSPK = J, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Output Power (Note 3)

POUT

THD+N = 10%,

gain = 12dB

ZSPK = 4I + 33FH

3.2

W

ZSPK = 8I + 68FH

1.8

ZSPK = 8I + 68FH,

VDD = 3.7V

0.93

THD+N = 1%,

gain = 12dB

ZSPK = 4I + 33FH

2.5

ZSPK = 8I + 68FH

1.4

ZSPK = 8I + 68FH,

VDD = 3.7V

0.77

Total Harmonic Distortion +

Noise

THD+N

f = 1kHz, POUT = 1W, TA = +25NC,

ZSPK = 4I + 33FH

0.02

0.06

%

f = 1kHz, POUT = 0.5W, TA = +25NC,

ZSPK = 8I + 68FH

0.013

Dynamic Range

DR

A-weighted, all gain settings, VRMS =

4.55V (clipping), 24- or 32-bit data

105

dB

Output Noise

VN

A-weighted, all gain settings, 24- or

32-bit data (Note 4)

25

F

VRMS

Gain (Relative to a 2.1dBV

Reference Level)

AV

GAIN = GND through 100kI

14.4

15

15.6

dB

GAIN = GND

11.4

12

12.6

GAIN = unconnected

8.4

9

9.6

GAIN = VDD

5.4

6

6.6

GAIN = VDD through 100kI

2.4

3

3.6

Current Limit

ILIM

2.8

A

Efficiency

h

ZSPK = 8I + 68FH, THD+N = 10%,

f = 1kHz, gain = 12dB

92

%

DAC Gain Error

1

%

Frequency Response

-0.2

+0.2

dB

DAC DIGITAL FILTERS

VOICE MODE IIR LOWPASS FILTER (LRCLK < 30kHz)

Passband Cutoff

fPLP

Ripple limit cutoff

0.443

x fS

Hz

-3dB cutoff

0.446

x fS

Stopband Cutoff

fSLP

0.464

x fS

Hz

Stopband Attenuation

f > fSLP

75

dB

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