MAX9708

20W/40W, Filterless, Spread-Spectrum,

Mono/Stereo, Class D Amplifier

8

Maxim Integrated

COMMON-MODE REJECTION RATIO

vs. FREQUENCY

FREQUENCY (Hz)

10k

1k

100

-105

-100

-95

-90

-85

-80

-75

-70

-65

-60

-110

10

100k

INPUT REFERRED

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

FREQUENCY (Hz)

10k

1k

100

-100

-90

-80

-70

-60

-50

-40

-30

-110

10

100k

CROSSTALK vs. FREQUENCY

FREQUENCY (Hz)

10k

1k

100

-110

-100

-90

-80

-70

-60

-50

-40

-120

10

100k

MAXIMUM STEADY-STATE OUTPUT POWER

vs. TEMPERATURE

AMBIENT TEMPERATURE (

°C)

60

40

50

5

15

10

25

20

30

35

40

0

30

70

PVDD = 18V, 8

Ω

STEREO MODE, 1kHz,

FS1 = FS2 = 1

TH0 = TH1 = 1

TH2 = 0

MEASURED WITH THE EV KIT (TQFN

PACKAGE), JUNCTION TEMPERATURE

MAINTAINED AT +110

°C

MAXIMUM STEADY-STATE OUTPUT POWER

vs. TEMPERATURE

AMBIENT TEMPERATURE (

°C)

60

40

50

10

20

40

30

50

60

70

0

30

70

PVDD = 18V, 4

Ω

MONO MODE, 1kHz,

FS1 = FS2 = 1

TH0 = TH1 = 1

TH2 = 0

MEASURED WITH THE EV KIT (TQFN

PACKAGE), JUNCTION TEMPERATURE

MAINTAINED AT +110

°C

Typical Operating Characteristics (continued)

(PVDD = VDD = +18V, PGND = GND = 0V, CSS = 0.47µF, CREG = 0.01µF, C1 = 0.1µF, C2 = 1µF, RLOAD = ∞, SHDN = high, MONO

= low, MUTE = high, G1 = low, G2 = high, FS1 = FS2 = high (SSM), SYNCIN = low. All load resistors (RL) are between OUT_+ and

OUT_-, TA = +25°C, unless otherwise stated.)

Pin Description

PIN

NAME

FUNCTION

1, 12, 42, 43,

44, 55, 56

N.C.

No Connection. Not internally connected.

2, 3, 4,

39, 40,

41, 49, 50

PGND

Power Ground

5, 6, 7,

36, 37, 38

PVDD

Positive Power Supply. Bypass to PGND with a 0.1µF and a 47µF capacitor with the smallest

capacitor placed as close to pins as possible.