MAX9789 MAXIM [Maxim Integrated Products], MAX9789 Datasheet - Page 8

• Manufacturer Part Number: MAX9789
• Description: Windows Vista-Compliant, Stereo Class AB Speaker Amplifiers and DirectDrive Headphone Amplifiers
• Manufacturer: MAXIM [Maxim Integrated Products]

Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
8
(V
∞, unless otherwise specified, GAIN1 = 0, GAIN2 = 1 (A
unless otherwise noted. Headphone mode: SPKR_EN = 1, HP_EN = 0. Speaker mode: SPKR_EN = 0, HP_EN = 1.)
DD
-100
-105
-110
-65
-70
-75
-80
-85
-90
-95
_______________________________________________________________________________________
= PV
TOTAL HARMONIC DISTORTION PLUS NOISE
10
vs. FREQUENCY (HEADPHONE MODE)
HPV
FS = 0.300V
R
L
DD
= 32Ω
DD
V
OUT
= CPV
= 3V
100
= -3dB FS
MAX9789A/MAX9789C/MAX9790A
RMS
SPEAKER SHUTDOWN WAVEFORM
FREQUENCY (Hz)
SPEAKER STARTUP WAVEFORM
DD
1k
= HPV
20ms/div
20ms/div
DD
10k
= LDO_EN = +5V, V
100k
MAX9789 toc18
MAX9789 toc20
-100
-105
-110
Typical Operating Characteristics (continued)
-65
-70
-75
-80
-85
-90
-95
SPKR_EN
5V/div
OUT_+ AND OUT_-
2V/div
OUT_+ - OUT_-
100mV/div
SPKR_EN
5V/div
OUT_+ AND OUT_-
2V/div
OUT_+ - OUT_-
100mV/div
TOTAL HARMONIC DISTORTION PLUS NOISE
10
GND
vs. FREQUENCY (HEADPHONE MODE)
FS = 0.300V
R
L
V
VSP
OUT
= 16Ω
= V
= -3dB FS
= 10dB, A
100
PGND
RMS
FREQUENCY (Hz)
= V
1k
VHP
CPGND
= 3.5dB), measurement BW = 20kHz AES17, T
-100
-105
-110
-65
-70
-75
-80
-85
-90
-95
TOTAL HARMONIC DISTORTION PLUS NOISE
10k
10
= V
MAX9789B/MAX9790B
vs. FREQUENCY (HEADPHONE MODE)
FS = 0.300V
R
SPEAKER STARTUP WAVEFORM
L
LDO_SET
= 32Ω
V
OUT
100k
100
= -3dB FS
RMS
FREQUENCY (Hz)
= 0V, C1 = C2 = C
20ms/div
-100
-105
-110
1k
-65
-70
-75
-80
-85
-90
-95
TOTAL HARMONIC DISTORTION PLUS NOISE
10
vs. FREQUENCY (HEADPHONE MODE)
HPV
FS = 0.300V
R
V
L
OUT
= 16Ω
10k
DD
= -3dB FS
MAX9789 toc19
= 3V
100
RMS
BIAS
FREQUENCY (Hz)
100k
SPKR_EN
5V/div
OUT_+ AND OUT_-
2V/div
OUT_+ - OUT_-
100mV/div
= C
1k
IN
= 1µF. R
A
= +25°C,
10k
L
=
100k