max9789a Maxim Integrated Products, Inc., max9789a Datasheet - Page 7

• Manufacturer Part Number: max9789a
• Description: Windows Vista-compliant, Stereo Class Ab Speaker Amplifiers And Directdrive Headphone Amplifiers Integrated Products
• Manufacturer: Maxim Integrated Products, Inc.

(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
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
= PV
10
Windows Vista-Compliant, Stereo Class AB Speaker
LEFT TO RIGHT
vs. FREQUENCY (SPEAKER MODE)
DD
Amplifiers and DirectDrive Headphone Amplifiers
= CPV
100
1.50
1.25
1.00
0.75
0.50
0.25
RIGHT TO LEFT
0
FREQUENCY (Hz)
CROSSTALK
0
DD
vs. OUTPUT POWER (SPEAKER MODE)
f
_______________________________________________________________________________________
IN
POWER DISSIPATION PER CHANNEL
SPEAKER STARTUP WAVEFORM
1k
= 1kHz
= HPV
OUTPUT POWER PER CHANNEL (W)
0.5
FS = 0.707V
V
R
OUT
L
DD
= 8Ω
10k
= -20dB FS
R
= LDO_EN = +5V, GND = PGND = CPGND = LDO_SET = 0V, C1 = C2 = C
L
20ms/div
= 8Ω
1.0
RMS
100k
R
L
= 4Ω
1.5
MAX9789A toc18
-100
-110
-120
-130
-140
-10
-20
-30
-40
-50
-60
-70
-80
-90
Typical Operating Characteristics (continued)
0
2.0
0
VSP
SPKR_EN
5V/div
OUT_+ AND OUT_-
2V/div
OUT_+ - OUT_-
100mV/div
SPEAKER OUTPUT SPECTRUM
= 10dB, A
5k
FREQUENCY (Hz)
VHP
10k
= 3.5dB), measurement BW = 20kHz AES17, T
FS = 0.707V
V
R
OUT
L
= 8Ω
15k
= -60dB FS
100
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
RMS
10
V
OUTPUT REFERRED
20k
RIPPLE
POWER-SUPPLY REJECTION RATIO
SPEAKER SHUTDOWN WAVEFORM
= 200mV
100
(SPEAKER MODE)
FREQUENCY (Hz)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
P-P
0
20ms/div
1
OUTPUT POWER vs. LOAD RESISTANCE
1k
THD+N = 1%
10k
(SPEAKER MODE)
BIAS
MAX9789A toc19
R
= C
L
10
THD+N = 10%
(Ω)
100k
IN
A
SPKR_EN
5V/div
OUT_+ AND OUT_-
2V/div
OUT_+ - OUT_-
100mV/div
= 1µF. R
= +25°C,
f
IN
= 1kHz
L
= ,
100
7