![](http://datasheet.mmic.net.cn/Maxim-Integrated-Products/MAX9791CETI-_datasheet_105808/MAX9791CETI-_9.png)
Typical Operating Characteristics (continued)
(VAVDD = VPVDD = VHPVDD = 5V, VGND = VPGND = VCPGND = 0, ILDO_OUT = 0, CLDO = 2 x 1F, C1 = C2 = 1F. RL = ∞, unless oth-
erwise specified. RIN1 = 20k (AVSPKR = 12dB), RIN2 = 40.2k (AVHP = 0dB), CIN1 = 470nF, CIN2 = CCOM = 1F, measurement BW
= 20kHz AES17, TA = +25°C, unless otherwise noted. Speaker mode: SPKR_EN = 0, HP_EN = 0. Headphone mode: SPKR_EN = 1,
HP_EN = 1.)
MAX9791/MAX9792
Windows Vista-Compliant Class D Speaker
Amplifiers with DirectDrive Headphone Amplifiers
_______________________________________________________________________________________
9
SPEAKER STARTUP WAVEFORM
MAX9791 toc13
SPKR_EN
2V/div
SPEAKER OUT
200
s/div
SPEAKER SHUTDOWN WAVEFORM
MAX9791 toc14
SPKR_EN
2V/div
SPEAKER OUT
200
s/div
WIDEBAND OUTPUT SPECTRUM
(SPEAKER MODE)
MAX9791
toc15
FREQUENCY (MHz)
OUTPUT
AMPLITUDE
(dBV)
10
1
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-120
0
100
RBW = 1kHz
INPUT AC GROUNDED
OUTPUT FREQUENCY SPECTRUM
(SPEAKER MODE)
MAX9791
toc16
FREQUENCY (kHz)
OUTPUT
MAGNITUDE
(dBV)
10
-100
-60
0
-140
-80
-40
-20
-120
120
515
VOUT = -60dBV
f = 1kHz
RL = 8
UNWEIGHTED
SPEAKER