Maxim MAX9778, MAX9777 manual Bias Voltage Bias, Digital Inputs MUTE, SHDN, HPSEN, GAINA/B, IN1/2

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

ELECTRICAL CHARACTERISTICS (continued)

(VDD = PVDD = 5.0V, GND = PGND = 0V, VSHDN = 5V, CBIAS = 1µF, RIN = RF = 15kΩ, RL = ∞. TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER	SYMBOL	CONDITIONS			MIN	TYP	MAX	UNITS
OUTPUT AMPLIFIERS (HEADPHONE MODE, HPS = VDD)
Power-Supply Rejection Ratio		VDD = 4.5V to 5.5V			75	106
	PSRR	f = 1kHz, VRIPPLE = 200mVP-P				88		dB
(Note 2)
		f = 20kHz, VRIPPLE = 200mVP-P				76
Output Power	POUT	fIN = 1kHz, THD+N <	RL = 32Ω			88		mW
		1%, TA = +25°C	RL = 16Ω			200
			POUT = 60mW,			0.002
Total Harmonic Distortion Plus		fIN = 1kHz,	RL = 32Ω
	THD+N							%
Noise		BW = 22Hz to 22kHz	POUT = 125mW,			0.002
			RL = 16Ω
Signal-to-Noise Ratio	SNR	RL = 32Ω, BW = 22Hz to 22kHz,				92		dB
		VOUT = 1VRMS
Slew Rate	SR					1.8		V/µs
Maximum Capacitive Load Drive	CL	No sustained oscillations				2		nF
Crosstalk		fIN = 10kHz				78		dB
BIAS VOLTAGE (BIAS)
BIAS Voltage	VBIAS				2.35	2.5	2.65	V
Output Resistance	RBIAS					50		kΩ
DIGITAL INPUTS (MUTE, SHDN, HPS_EN, GAINA/B, IN1/2)
Input-Voltage High	VIH				2			V
Input-Voltage Low	VIL						0.8	V
Input Leakage Current	IIN						±1	µA
HEADPHONE SENSE INPUT (HPS)
Input-Voltage High	VIH				0.9 x			V
					VDD
Input-Voltage Low	VIL						0.7 x	V
							VDD
Input Leakage Current	IIN						±1	µA
Click/Pop Level	KCP	Peak voltage, A-weighted,		Into shutdown		-70		dBV
		32 samples per second
				Out of shutdown		-52
		(Notes 2, 4)

MAX9777/MAX9778

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