MAX9770EUI datasheet(2/24 Pages) MAXIM

2 / 24 page

1.2W Low-EMI, Filterless, Mono Class D Amplifier

with Stereo DirectDrive Headphone Amplifiers

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD = PVDD = CPVDD = 3.3V, GND = PGND = CPGND = 0V, SHDN = 3.3V, C1 = C2 = 1µF, CBIAS = 0.047µF, SYNC = GND, RL =

∞,

speaker load connected between OUT+ and OUT-, headphone load connected between HPOUT_ and GND, TA = TMIN to TMAX,

unless otherwise noted. Typical values are at TA = +25°C.) (Notes 1, 2)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

GND to PGND to CPGND......................................-0.3V to +0.3V

VDD to PVDD to CPVDD..........................................-0.3V to +0.3V

VDD to GND..............................................................................6V

PVDD to PGND .........................................................................6V

CPVDD to CPGND ....................................................................6V

CPVSS to CPGND....................................................................-6V

SVSS to GND ...........................................................................-6V

C1N..........................................(PVSS - 0.3V) to (CPGND + 0.3V)

HPOUT_ to GND ....................................................................

±3V

All other pins to GND..................................-0.3V to (VDD + 0.3V)

Continuous Current Into/Out of:

PVDD, PGND, OUT_ ......................................................600mA

PVSS ..............................................................................260mA

Duration of HPOUT_ Short Circuit to VDD, PVDD,

GND, PGND ...........................................................Continuous

Duration of Short Circuit between

HPOUTL and HPOUTR ..........................................Continuous

Duration of OUT_ Short Circuit to VDD, PVDD, GND, PGND ..10s

Duration of Short Circuit Between OUT+ and OUT-...............10s

Continuous Power Dissipation (TA = +70°C)

28-Pin TQFN (derate 20.8mW/°C above +70°C) .......1667mW

28-Pin TSSOP (derate 12.8mW°C above +70°C) ......1026mW

Junction Temperature ......................................................+150°C

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

GENERAL

Supply Voltage Range

VDD

Inferred from PSRR test

2.5

5.5

Headphone mode

5.5

Quiescent Supply Current

IDD

No load

Speaker mode

5.2

7.5

Shutdown Supply Current

ISHDN

SHDN = HPS = GND

0.1

µA

Shutdown to Full Operation

tON

MONO

Input Impedance

RIN

(Note 3)

INL_, INR_

Ω

Bias Voltage

VBIAS

1.1

1.25

1.4

Feedthrough

From any unselected input to any output,

f = 10kHz

SPEAKER AMPLIFIER (GAIN1 = GAIN2 = VDD, HPS = GND)

Output Offset Voltage

VOS

±15

±70

VDD = 2.5V to 5.5V

VRIPPLE = 200mVP-P, f = 217Hz

VRIPPLE = 200mVP-P, f = 1kHz

Power-Supply Rejection Ratio

PSRR

(Note 4)

VRIPPLE = 200mVP-P, f = 20kHz

RL = 8

Ω

550

VDD = 3.3V

RL = 4

Ω

900

Output Power

POUT

f = 1kHz,

THD+N = 1%,

GAIN1 = 1,

GAIN2 = 0

VDD = 5V

RL = 8

Ω

1200

RL = 8

Ω, POUT = 300mW, f = 1kHz

0.025

Total Harmonic Distortion Plus

Noise

THD+N

RL = 4

Ω, POUT = 300mW, f = 1kHz

0.03

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