MAX9723 查看數據表（PDF） - Maxim Integrated

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MAX9723

Stereo DirectDrive Headphone Amplifier with BassMax, Volume Control, and I2C

Maxim Integrated 

MAX9723

Stereo DirectDrive Headphone Amplifier

with BassMax, Volume Control, and I2C

Timing Characteristics

(VDD = SHDN = 3V, PGND = SGND = 0V, C1 = C2 = 1μF, BB_ = 0V. gain = 0dB, maximum volume, BassMax disabled. Load con-

nected between OUT_ and SGND where specified. TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C, see

Timing Diagram.) (Notes 1, 3)

PARAMETER

Serial Clock Frequency

Bus Free Time Between a STOP

and a START Condition

SYMBOL

fSCL

tBUF

CONDITIONS

MIN TYP MAX UNITS

0

400

kHz

1.3

µs

START Condition Hold Time

tHD:STA

0.6

µs

Low Period of the SCL Clock

High Period of the SCL Clock

Setup Time for a Repeated

START Condition

tLOW

tHIGH

tSU:STA

1.3

µs

0.6

µs

0.6

µs

Data Hold Time

Data Setup Time

Maximum Rise Time of SDA and

SCL Signals

tHD:DAT

tSU:DAT

tr

0

0.9

µs

100

ns

300

ns

Maximum Fall Time of SDA and

SCL Signals

tf

300

ns

Setup Time for STOP Condition

Pulse Width of Suppressed Spike

Maximum Capacitive Load for

Each Bus Line

tSU:STO

tSP

CL_BUS

0.6

µs

100

ns

400

pF

Note 1: All specifications are 100% tested at TA = +25°C. Temperature limits are guaranteed by design.

Note 2: Inputs AC-coupled to SGND.

Note 3: Guaranteed by design.

Note 4: Headphone mode testing performed with a 32Ω resistive load connected to GND. Mode transitions are controlled by SHDN.

The KCP level is calculated as: 20 x log [(level peak voltage during mode transition, no input signal)/(peak voltage under

normal operation at rated power)]. Units are expressed in dB.

Note 5: Output power MIN is specified at TA = +25°C.

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