MAX9770EUI datasheet(3/24 Pages) MAXIM

3 / 24 page

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

with Stereo DirectDrive Headphone Amplifiers

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(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)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Signal-to-Noise Ratio

SNR

RL = 8

Ω, VOUT = 2VRMS, A-weighted

85.9

SYNC = GND

980

1100

1220

SYNC = FLOAT

1280

1450

1620

Output Switching Frequency

SYNC = VDD

1220

±120kHz

kHz

SYNC Frequency Lock Range

800

2000

kHz

Efficiency

PO = 1000mW, f = 1kHz

GAIN1 = 0, GAIN2 = 0

GAIN1 = 0, GAIN2 = 1

GAIN1 = 1, GAIN2 = 0

Gain

GAIN1 = 1, GAIN2 = 1

Gain Accuracy

±5%

Speaker Path Off-Isolation

HPS = VDD, headphone amplifier active,

f = 1kHz

102

HEADPHONE AMPLIFIER (GAIN1 = 1, GAIN2 = 0, HPS = VDD )

Output Offset Voltage

VOS

±5

±10

VDD = 2.5V to 5.5V

VRIPPLE = 200mVP-P, f = 217kHz

VRIPPLE = 200mVP-P, f = 1kHz

Power-Supply Rejection Ratio

PSRR

(Note 3)

VRIPPLE = 200mVP-P, f = 20kHz

RL = 32

Ω

VDD = 3.3V

RL = 16

Ω

RL = 32

Ω

Output Power

POUT

f = 1kHz,

THD+N = 1%

VDD = 5V

RL = 16

Ω

RL = 32

Ω, POUT = 50mW, f = 1kHz

0.015

Total Harmonic Distortion Plus

Noise

THD+N

RL = 16

Ω, POUT = 35mW, f = 1kHz

0.03

Signal-to-Noise Ratio

SNR

RL = 32

Ω, VOUT = 300mVRMS,

BW = 22Hz to 22kHz

101

Crosstalk

Between channels, f = 1kHz,

VIN = 200mVP-P

Headphone Off-Isolation

HPS = GND, speaker amplifier active,

f = 1kHz

MAX9770EUI Datasheet(PDF) 3 Page - Maxim Integrated Products

MAX9770EUI Datasheet(HTML) 3 Page - Maxim Integrated Products

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Datasheet Download

Link URL