2 x 1.5W, Stereo Class D Audio Subsystem

with DirectDrive Headphone Amplifier

______________________________________________________________________________________

11

Typical Operating Characteristics (continued)

(VDD = PVDD = CPVDD = 3.3V, GND = PGND = CPGND = 0V, SHDN = VDD, I2C default gain 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 stated. C1 = C2 = C3 = 1µF. TA =

+25°C, unless otherwise noted.)

MAX9776 SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

5.2

4.7

4.2

3.7

3.2

6

8

10

12

14

16

4

2.7

SP MODE

INPUTS AC GROUNDED

OUTPUTS UNLOADED

SHUTDOWN SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

5.2

4.7

4.2

3.7

3.2

10

20

30

40

50

60

70

80

90

100

0

2.7

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

FREQUENCY (Hz)

10k

1k

100

0.01

0.1

1

0.001

10

100k

VDD = 5V

RL = 32

Ω

POUT = 20mW

POUT = 40mW

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

FREQUENCY (Hz)

10k

1k

100

0.01

0.1

1

0.001

10

100k

VDD = 3.3V

RL = 16

Ω

POUT = 20mW

POUT = 40mW

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

FREQUENCY (Hz)

10k

1k

100

0.01

0.1

1

0.001

10

100k

VDD = 3.3V

RL = 32

Ω

POUT = 10mW

POUT = 40mW

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. OUTPUT POWER

OUTPUT POWER (mW)

60

40

20

0.01

0.1

1

10

100

0.001

080

VDD = 5V

RL = 32

Ω

f = 10kHz

f = 20Hz

f = 1kHz