Maxim MAX9778, MAX9777 manual Entering Shutdown Speaker Mode

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux

Typical Operating Characteristics (continued)

(VDD = PVDD = 5V, GND = PGND = 0V, VSHDN = 5V, CBIAS = 1µF, TA = +25°C, unless otherwise noted.)

POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (SPEAKER MODE)

	40	VRIPPLE = 200mVP-P			toc18
					MAX9777/78
	50
	60
(dB)
PSRR	70
	80
	90
	100	100	1k	10k
	10				100k

FREQUENCY (Hz)

CROSSTALK vs. FREQUENCY

(SPEAKER MODE)

	-40	VIN = 200mVP-P	toc19
			MAX9777/78
	-50	RL = 8Ω
	-60
(dB)	-70
CROSSTALK	-80	RIGHT TO LEFT
	-90
	-100

LEFT TO RIGHT

-110

-120

10 100 1k 10k 100k

FREQUENCY (Hz)

MAX9777/MAX9778

ENTERING SHUTDOWN (SPEAKER MODE) EXITING SHUTDOWN (SPEAKER MODE)

MAX9777/78 toc20

VDD

2V/div

OUT_+ AND OUT_- 1V/div

OUT_+ - OUT_- 200mV/div

400ms/div

MAX9777/78 toc21

SHDN 2V/div

OUT_+ AND OUT_- 1V/div

OUT_+ - OUT_- 500mV/div

100ms/div

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (HEADPHONE MODE)

	1			toc22
			RL = 16Ω
				MAX9777/78
			AV = 1V/V
	0.1
(%)		POUT = 25mW
THD+N	0.01		POUT = 50mW
	0.001	POUT = 100mW
			POUT = 150mW

0.0001

10 100 1k 10k 100k

FREQUENCY (Hz)

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (HEADPHONE MODE)

	1				toc23
				RL = 16Ω
					MAX9777/78
				AV = 2V/V
	0.1
(%)		POUT = 25mW	POUT = 50mW
THD+N	0.01
	0.001	POUT = 100mW		POUT = 150mW
0.0001		100	1k	10k
	10				100k

FREQUENCY (Hz)

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