MAX9791 datasheet(3/30 Pages) MAXIM

Part #	MAX9791

Description	Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers

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Manufacturer	MAXIM [Maxim Integrated Products]

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Windows Vista-Compliant Class D Speaker

Amplifiers with DirectDrive Headphone Amplifiers

_______________________________________________________________________________________

3

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SPEAKER AMPLIFIER

RL = 4

Ω

(MAX9791)

1.7

RL = 8

Ω

(MAX9791)

1.2

THD+N = 1%,

f = 1kHz,

TA = +25

°C

(Note 4)

RL = 3

Ω

(MAX9792)

3

RL = 4

Ω

(MAX9791)

2.2

RL = 8

Ω

(MAX9791)

1.5

Output Power

POUT

THD+N = 10%,

f = 1kHz,

TA = +25

°C

(Note 4)

RL = 3

Ω

(MAX9792)

3.7

W

RL = 8

Ω, POUT = 500mW, f = 1kHz (Note 4)

0.04

Total Harmonic Distortion Plus

Noise

THD+N

RL = 4

Ω, POUT = 500mW, f = 1kHz (Note 4)

0.03

%

VAVDD = VPVDD = 4.5V to 5.5V, TA = +25

°C60

80

f = 217Hz, 200mVP-P

73

f = 1kHz, 200mVP-P

75

Power-Supply Rejection Ratio

PSRR

f = 10kHz, 200mVP-P

62

dB

Feedback Impedance

RFSKR

Guaranteed by design

20

k

Ω

Gain

AV

RIN1 = 20k

Ω

12

dB

Output Offset Voltage

VOS

Measured between OUT_+ and OUT_-,

TA = +25

°C

±3

±10

mV

Into shutdown

-52.4

Click-and-Pop Level

KCP

RL = 8

Ω,

peak voltage,

A-weighted,

32 samples per second

(Notes 4, 5, and 6)

Out of

shutdown

-54

dBV

A-weighted

98

Signal-to-Noise Ratio

SNR

RL = 8

Ω

POUT = 1.2W fIN = 1kHz,

(Note 4)

20Hz to 20kHz

94

dB

Noise

VN

A-weighted

38

µVRMS

L to R, R to L, RL = 8

Ω, VIN = -20dBFS =

100mVRMS, fIN = 1kHz (Note 4)

78

L to R, R to L, RL = 8

Ω, VIN = -20dBFS =

100mVRMS, fIN = 15kHz (Note 4)

70

Crosstalk

HP to SPKR, RLSPKR = 8

Ω, PHP = 20mW,

RLHP = 32

Ω, fIN = 1kHz (Note 4)

77

dB

ELECTRICAL CHARACTERISTICS (continued)

(VAVDD = VPVDD = VHPVDD = 5V, VGND = VPGND = VCPGND = 0, ILDO_OUT = 0, CLDO = 2µF, C1 = C2 = 1µF. RL = ∞, unless other-

wise specified. RIN1 = 20kΩ (AVSPKR = 12dB), RIN2 = 40.2kΩ (AVHP = 0dB), CIN1 = 470nF, CIN2 = CCOM = 1µF, TA = TMIN to TMAX,

unless otherwise noted. Typical values are at TA = +25°C.) (Note 3)

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