Windows Vista-Compliant, Stereo Class AB Speaker

Amplifiers and DirectDrive Headphone Amplifiers

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5

Note 2: All devices are 100% production tested at room temperature. All temperature limits are guaranteed by design.

Note 3: Specified at room temperature with an 8Ω resistive load connected across BTL output for speaker amplifier. Specified at

room temperature with a 32Ω resistive load connected between HPR, HPL, and GND for headphone amplifier. Speaker and

headphone mode transitions are controlled by SPKR_EN and HP_EN control pins, respectively.

Note 4: Amplifier inputs AC-coupled to GND.

Note 5: Maximum value is due to test limitations.

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

LDO_SET Input Bias Current

(Note 5)

±20

±500

nA

25

50

Dropout Voltage (Note 6)

output operation),

75

150

mV

Current Limit

300

mA

Startup Time

20

µs

Line Regulation

-4.8

+0.8

+4.8

mV/V

Load Regulation

0.2

mV/mA

f = 1kHz

59

Ripple Rejection

f = 10kHz

42

dB

Output Voltage Noise

125

DIGITAL INPUTS (

SPKR_EN, HP_EN, MUTE, GAIN1, GAIN2, LDO_EN (MAX9789 Only))

Input-Voltage High

2V

Input-Voltage Low

0.8

V

Input Bias Current

±1

µA