Maxim MAX9778 manual Timing Characteristics MAX9777

MAX9777/MAX9778

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
2-WIRE SERIAL INTERFACE (SCL, SDA, ADD, INT) (MAX9777)
Input-Voltage High	VIH		2.6			V
Input-Voltage Low	VIL				0.8	V
Input Hysteresis				0.2		V
Input High Leakage Current	IIH	VIN = 5V			±1	µA
Input Low Leakage Current	IIL	VIN = 0V			±1	µA
Input Capacitance	CIN			10		pF
Output-Voltage Low	VOL	IOL = 3mA			0.4	V
Output Current High	IOH	VOH = 5V			1	µA
TIMING CHARACTERISTICS (MAX9777)
Serial Clock Frequency	fSCL				400	kHz
Bus Free Time Between STOP	tBUF		1.3			µs
and START Conditions
START Condition Hold Time	tHD:STA		0.6			µs
START Condition Setup Time	tSU:STA		0.6			µs
Clock Period Low	tLOW		1.3			µs
Clock Period High	tHIGH		0.6			µs
Data Setup Time	tSU:DAT		100			ns
Data Hold Time	tHD:DAT	(Note 3)	0		0.9	µs
Receive SCL/SDA Rise Time	tr	(Note 4)	20 +		300	ns
			0.1CB
Receive SCL/SDA Fall Time	tf	(Note 4)	20 +		300	ns
			0.1CB
Transmit SDA Fall Time	tf	(Note 4)	20 +		250	ns
			0.1CB
Pulse Width of Suppressed	tSP	(Note 5)		50		ns
Spike

Note 1: All devices are 100% production tested at +25°C. All temperature limits are guaranteed by design.

Note 2: Inputs AC-coupled to GND.

Note 3: A master device must provide a hold time of at least 300ns for the SDA signal to bridge the undefined region of SCL’s falling edge.

Note 4: CB = total capacitance of one of the bus lines in picofarads. Device tested with CB = 400pF. 1kΩ pullup resistors connected from SDA/SCL to VDD.

Note 5: Input filters on SDA, SCL, and ADD suppress noise spikes of less than 50ns.

Note 6: Headphone mode testing performed with 32Ω resistive load connected to GND. Speaker mode testing performed with 8Ω resistive load connected to GND. Mode transitions are controlled by SHDN. KCP level is calculated as 20log[(peak voltage during mode transition, no input signal)/1VRMS]. Units are expressed in dBV.

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