MAX9789AETJ+ datasheet(8/28 Pages) MAXIM

Part #	MAX9789AETJ+

Description	Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers

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Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

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8 / 28 page

SPEAKER SHUTDOWN WAVEFORM

MAX9789 toc20

20ms/div

2V/div

5V/div

100mV/div

OUT_+ AND OUT_-

OUT_+ - OUT_-

SPKR_EN

Typical Operating Characteristics (continued)

(VDD = PVDD = CPVDD = HPVDD = LDO_EN = +5V, VGND = VPGND = VCPGND = VLDO_SET = 0V, C1 = C2 = CBIAS = CIN = 1µF. RL =

∞, unless otherwise specified, GAIN1 = 0, GAIN2 = 1 (AVSP = 10dB, AVHP = 3.5dB), measurement BW = 20kHz AES17, TA = +25°C,

unless otherwise noted. Headphone mode: SPKR_EN = 1, HP_EN = 0. Speaker mode: SPKR_EN = 0, HP_EN = 1.)

Windows Vista-Compliant, Stereo Class AB Speaker

Amplifiers and DirectDrive Headphone Amplifiers

8

_______________________________________________________________________________________

SPEAKER STARTUP WAVEFORM

MAX9789 toc18

20ms/div

2V/div

OUT_+ AND OUT_-

OUT_+ - OUT_-

5V/div

SPKR_EN

100mV/div

MAX9789A/MAX9789C/MAX9790A

SPEAKER STARTUP WAVEFORM

MAX9789 toc19

20ms/div

OUT_+ AND OUT_-

2V/div

OUT_+ - OUT_-

100mV/div

SPKR_EN

5V/div

MAX9789B/MAX9790B

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (HEADPHONE MODE)

FREQUENCY (Hz)

10k

1k

100

-105

-95

-85

-75

-65

-110

-100

-90

-80

-70

10

100k

FS = 0.300VRMS

RL = 32

Ω

VOUT = -3dB FS

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (HEADPHONE MODE)

FREQUENCY (Hz)

10k

1k

100

-105

-95

-85

-75

-65

-110

-100

-90

-80

-70

10

100k

HPVDD = 3V

FS = 0.300VRMS

RL = 32

Ω

VOUT = -3dB FS

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (HEADPHONE MODE)

FREQUENCY (Hz)

10k

1k

100

-105

-95

-85

-75

-65

-110

-100

-90

-80

-70

10

100k

FS = 0.300VRMS

RL = 16

Ω

VOUT = -3dB FS

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY (HEADPHONE MODE)

FREQUENCY (Hz)

10k

1k

100

-105

-95

-85

-75

-65

-110

-100

-90

-80

-70

10

100k

HPVDD = 3V

FS = 0.300VRMS

RL = 16

Ω

VOUT = -3dB FS

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MAX9789AETJ+ Datasheet(PDF) 8 Page - Maxim Integrated Products

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