MAX9775 View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX9775

2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier

Maxim Integrated 

2 x 1.5W, Stereo Class D Audio Subsystem

with DirectDrive Headphone Amplifier

ELECTRICAL CHARACTERISTICS (continued)

(VDD = PVDD = CPVDD = 3.3V, GND = PGND = CPGND = 0V, SHDN = VDD, I2C settings (INA gain = +20dB, INB gain = INC gain =

0dB, volume setting = 0dB, mono path gain = 0dB, SHDN = 1, SSM = 1). Speaker load resistors (RLSP) are terminated between

OUT_+ and OUT_-, headphone load resistors are terminated to GND, unless otherwise noted. C1 = C2 = C3 = 1µF. TA = TMIN to

TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER

SPEAKER AMPLIFIERS

Output Offset Voltage

Click-and-Pop Level

Power-Supply Rejection Ratio

(Note 3)

SYMBOL

CONDITIONS

VOS

KCP

PSRR

TA = +25°C

TMIN ≤ TA ≤ TMAX

Peak voltage,

TA = +25°C,

A-weighted, 32

samples per second

(Notes 2, 3)

TA = +25°C

Into shutdown

Out of shutdown

Into mute

Out of mute

VDD = 2.7V to 5.5V

f = 217Hz,

100mVP-P ripple

f = 1kHz,

100mVP-P ripple

MIN TYP MAX UNITS

±5.5 ±23.5

mV

±40

-62

-60

dB

-63

-62

48

70

68

dB

60

f = 20kHz,

50

100mVP-P ripple

Output Power (Note 4)

RL = 4Ω, VDD = 5V

1500

POUT

THD+N = 1%,

TA = +25°C

RL = 8Ω, VDD = 3.3V

450

mW

RL = 8Ω, VDD = 5V

1115

Current Limit

1.6

A

Total Harmonic Distortion Plus

Noise (Note 4)

THD+N f = 1kHz

RL = 8Ω,

POUT = 125mW

RL = 4Ω,

POUT = 250mW

0.03

%

0.04

Signal-to-Noise Ratio

VOUT = 1.8VRMS, BW = 20Hz to 20kHz

81

SNR RL = 8Ω, 3D not

dB

active (Note 3)

A-weighted

84

Output Frequency

fOSC

Fixed-frequency modulation

Spread-spectrum modulation

1100

kHz

1100 ±30

Efficiency

Gain

Channel-to-Channel Gain

Tracking (Note 5)

η

POUT = 470mW, f = 1kHz both channels

driven, L = 68µH in series with 8Ω load

AV

TA = +25°C

79

%

12

dB

±1

%

3D Sound Resistors (Note 5)

R3D

Used with 22nF and 2.2nF external

capacitors

5

7

9

kΩ

Crosstalk (Notes 4, 5)

L to R, R to L, f = 10kHz, RL = 8Ω,

VOUT = 300mVRMS

73

dB

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