MAX9700 datasheet(3/19 Pages) MAXIM

Part #	MAX9700

Description	1.2W, Low-EMI, Filterless, Class D Audio Amplifier

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Manufacturer	MAXIM [Maxim Integrated Products]

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1.2W, Low-EMI, Filterless,

Class D Audio Amplifier

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(VDD = PVDD = SHDN = 3.3V, GND = PGND = 0V, SYNC = GND (FFM), RL = 8

Ω, RL connected between OUT+ and OUT-, TA =

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

Note 1: All devices are 100% production tested at +25°C. All temperature limits are guaranteed by design.

Note 2: Testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For RL = 4

Ω, L = 33µH.

For RL = 8

Ω, L = 68µH. For RL = 16Ω, L = 136µH.

Note 3: PSRR is specified with the amplifier inputs connected to GND through CIN.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

FFM

89

BW = 22Hz

to 22kHz

SSM

87

FFM

92

Signal-to-Noise Ratio

SNR

VOUT = 2VRMS

A-weighted

SSM

90

dB

SYNC = GND

980

1100

1220

SYNC = float

1280

1450

1620

Oscillator Frequency

fOSC

SYNC = VDD (SSM mode)

1220

±120

kHz

SYNC Frequency Lock Range

800

2000

kHz

Efficiency

η

POUT = 500mW, fIN = 1kHz

94

%

DIGITAL INPUTS (SHDN, SYNC)

VIH

2

Input Thresholds

VIL

0.8

V

SHDN Input Leakage Current

±1µA

SYNC Input Current

±5µA

ELECTRICAL CHARACTERISTICS

(VDD = PVDD = SHDN = 5V, GND = PGND = 0V, SYNC = GND (FFM), RL = 8

Ω, RL connected between OUT+ and OUT-, TA = TMIN

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Quiescent Current

IDD

5.2

mA

Shutdown Current

ISHDN

0.1

µA

Common-Mode Rejection Ratio

CMRR

f = 1kHz, input referred

72

dB

f = 217Hz

72

Power-Supply Rejection Ratio

PSRR

200mVP-P ripple

f = 20kHz

55

dB

RL = 16

Ω

700

RL = 8

Ω

1200

Output Power

POUT

THD+N = 1%

RL = 6

Ω

1600

mW

RL = 8

Ω, POUT = 125mW

0.015

Total Harmonic Distortion

Plus Noise

THD+N

f = 1kHz, either

FFM or SSM

RL = 4

Ω, POUT = 125mW

0.02

%

FFM

92.5

BW = 22Hz to

22kHz

SSM

90.5

FFM

95.5

Signal-to-Noise Ratio

SNR

VOUT =

3VRMS

A-weighted

SSM

93.5

dB

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