Maxim MAX9777, MAX9778 manual RL = 32Ω

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.)

TOTAL HARMONIC DISTORTION PLUS NOISE	TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)	vs. FREQUENCY (HEADPHONE MODE)

TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER (HEADPHONE MODE)

	1		RL = 32Ω	toc24		1
				MAX9777/78
			AV = 1V/V
	0.1					0.1
(%)		POUT = 25mW	POUT = 50mW		(%)
THD+N	0.01				THD+N	0.01
	0.001					0.001
		POUT = 100mW	POUT = 150mW

	toc25
RL = 32Ω
	MAX9777/78
AV = 2V/V

POUT = 25mW	POUT = 50mW
POUT = 150mW	POUT = 100mW

	100	AV = 1V/V	toc26
			MAX9777/78
	10	RL = 16Ω
(%)	1
		f = 20Hz	f = 10kHz
THD+N	0.1
	0.01
	0.001

MAX9777/MAX9778

0.0001					0.0001
10	100	1k	10k	100k	10	100	1k	10k	100k
		FREQUENCY (Hz)					FREQUENCY (Hz)

0.0001		f = 1kHz
0	50	100	150	200	250	300
		OUTPUT POWER (mW)

TOTAL HARMONIC DISTORTION PLUS NOISE	TOTAL HARMONIC DISTORTION PLUS NOISE	TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (HEADPHONE MODE)	vs. OUTPUT POWER (HEADPHONE MODE)	vs. OUTPUT POWER (HEADPHONE MODE)

	100	AV = 2V/V					toc27		100
							MAX9777/78
	10	RL = 16Ω							10
(%)	1							(%)	1
						f = 10kHz
THD+N	0.1		f = 20Hz					THD+N	0.1
	0.01								0.01
	0.001				f = 1kHz				0.001
0.0001								0.0001
	0	50	100	150	200	250	300
			OUTPUT POWER (mW)

	AV = 1V/V				toc28		100		AV = 2V/V				toc29
					MAX9777/78								MAX9777/78
	RL = 32Ω						10		RL = 32Ω
							1			f = 1kHz
						(%)
				f = 10kHz								f = 10kHz
						THD+N	0.1			f = 20Hz
		f = 20Hz
							0.01
							0.001
			f = 1kHz			0.0001
0	25	50	75	100	125			0	25	50	75	100	125
		OUTPUT POWER (mW)								OUTPUT POWER (mW)

	OUTPUT POWER vs. AMBIENT TEMPERATURE							OUTPUT POWER vs. AMBIENT TEMPERATURE							OUTPUT POWER vs. LOAD RESISTANCE
		(HEADPHONE MODE)							(HEADPHONE MODE)							(HEADPHONE MODE)
(mW)	300					MAX9777/78toc30	(mW)	150					MAX9777/78toc331	(mW)	600		THD+N = 10%		MAX9777/78toc32
	200							100							400
																			f = 1kHz
	250	THD+N = 10%						125	THD+N = 10%						500
POWER	150	THD+N = 1%					POWER	75	THD+N = 1%					POWER	300
OUTPUT	100						OUTPUT	50						OUTPUT	200		THD+N = 1%
	50	f = 1kHz						25	f = 1kHz						100
		RL = 16Ω						0	RL = 32Ω						0
	0
	-40	-15	10	35	60	85		-40	-15	10	35	60	85		1	10	100	1k	10k
		AMBIENT TEMPERATURE (°C)							AMBIENT TEMPERATURE (°C)							LOAD RESISTANCE (Ω)

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