max9789a Maxim Integrated Products, Inc., max9789a Datasheet - Page 9

• 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
-110
-120
-130
-140
-100
300
275
250
225
200
175
150
125
100
-10
-20
-30
-40
-50
-60
-70
-80
-90
-10
-20
-30
-40
-50
-60
-70
-80
-90
75
50
25
0
0
0
= PV
POWER DISSIPATION vs. OUTPUT POWER
10
0
0
Windows Vista-Compliant, Stereo Class AB Speaker
vs. FREQUENCY (HEADPHONE MODE)
V
OUTPUT REFERRED
POWER-SUPPLY REJECTION RATIO
RIPPLE
HEADPHONE OUTPUT SPECTRUM
DD
OUTPUT POWER PER CHANNEL (mW)
Amplifiers and DirectDrive Headphone Amplifiers
25
= CPV
= 200mV
100
(HEADPHONE MODE)
5
FREQUENCY (kHz)
FREQUENCY (Hz)
50
P-P
DD
_______________________________________________________________________________________
R
L
10
1k
= HPV
= 32Ω
75
FS = 0.707V
V
R
R
OUT
L
DD
L
= 32Ω
= 16Ω
10k
15
= -60dB FS
100
= LDO_EN = +5V, GND = PGND = CPGND = LDO_SET = 0V, C1 = C2 = C
RMS
100k
125
20
150
100
125
100
Typical Operating Characteristics (continued)
50
75
50
25
0
0
vs. OUTPUT POWER (HEADPHONE MODE)
10
0
VSP
OUTPUT POWER vs. LOAD RESISTANCE
THD+N = 1%
HPV
POWER DISSIPATION PER CHANNEL
HEADPHONE STARTUP WAVEFORM
= 10dB, A
DD
OUTPUT POWER PER CHANNEL (mW)
= 3V
20
(HEADPHONE MODE)
20ms/div
VHP
R
L
100
40
(Ω)
= 3.5dB), measurement BW = 20kHz AES17, T
THD+N = 10%
R
L
= 32Ω
R
L
= 16Ω
60
f
MAX9789A toc36
IN
= 1kHz
1000
80
HP_EN
5V/div
HP_
500mV/div
100
125
100
50
75
50
25
0
0
3.0
10
HEADPHONE OUTPUT POWER vs. HPV
OUTPUT POWER vs. LOAD RESISTANCE
THD+N = 1%
f
HEADPHONE SHUTDOWN WAVEFORM
IN
THD+N = 1%
= 1kHz
3.5
(HEADPHONE MODE)
BIAS
R
HPV
20ms/div
L
THD+N = 10%
R
= C
= 16Ω
L
100
4.0
DD
(Ω)
R
IN
(V)
L
A
= 32Ω
= 1µF. R
= +25°C,
4.5
HPV
f
IN
MAX9789A toc37
= 1kHz
DD
L
= 3V
= ,
1000
DD
5.0
HP_EN
5V/div
HP_
500mV/div
9