max9791 Maxim Integrated Products, Inc., max9791 Datasheet - Page 10

• Manufacturer Part Number: max9791
• Description: Windows Vista-compliant Class D Speaker Amplifiers With Directdrive Headphone Amplifiers
• Manufacturer: Maxim Integrated Products, Inc.

Windows Vista-Compliant Class D Speaker
Amplifiers with DirectDrive Headphone Amplifiers
(V
erwise specified. R
= 20kHz AES17, T
HP_EN = 1.)
10
AVDD
250
200
150
100
90
80
70
60
50
40
30
20
10
50
0
0
______________________________________________________________________________________
3.0
10
OUTPUT POWER vs. LOAD RESISTANCE
= V
THD+N = 1%
f = 1kHz
HEADPHONE OUTPUT POWER
PVDD
3.5
(HEADPHONE MODE)
vs. HPVDD VOLTAGE
LOAD RESISTANCE (Ω)
= V
A
IN1
4.0
V
R
= +25°C, unless otherwise noted. Speaker mode: SPKR_EN = 0, HP_EN = 0. Headphone mode: SPKR_EN = 1,
HPVDD
HPVDD
L
-100
-120
-140
= 32Ω
-20
-40
-60
-80
100
= 20kΩ (A
0
(V)
THD+N = 10%
4.5
0
V
f = 1kHz
RIGHT AND LEFT
FS = 707mV
V
R
HPVDD
= 5V, V
R
IN
L
THD+N = 1%
OUTPUT FREQUENCY SPECTRUM
L
= 32Ω
= 16Ω
= -60dBFS
= 3V
5.0
VSPKR
(HEADPHONE MODE)
5
GND
RMS
FREQUENCY (kHz)
1000
5.5
= 12dB), R
= V
10
PGND
-100
-110
-120
400
350
300
250
200
150
100
-10
-20
-30
-40
-50
-60
-70
-80
-90
Typical Operating Characteristics (continued)
50
= V
0
0
15
IN2
0.01
POWER DISSIPATION vs. OUTPUT POWER
0
CPGND
vs. FREQUENCY (HEADPHONE MODE)
V
R
POWER-SUPPLY REJECTION RATIO
= 40.2kΩ (A
RIPPLE
L
25
= 32Ω
PER CHANNEL OUTPUT POWER (mW)
HEADPHONE
20
= 200mV
0.1
50
(HEADPHONE MODE)
= 0, I
FREQUENCY (kHz)
75
R
P-P
L
LDO_OUT
RIGHT
= 16Ω
VHP
100
1
= 0dB), C
125
R
LEFT
L
= 0, C
150
= 32Ω
10
175
IN1
LDO
200
100
= 470nF, C
= 2 x 1µF, C1 = C2 = 1µF. R
STARTUP WAVEFORM
-100
200μs/div
300
250
200
150
100
-20
-30
-40
-50
-60
-70
-80
-90
50
0
IN2
0.01
POWER DISSIPATION vs. OUTPUT POWER
0
RIGHT TO LEFT
COM AND SENSE
DISABLED
V
= C
HPVDD
RIGHT TO LEFT
COM AND SENSE
PER CHANNEL OUTPUT POWER (mW)
CROSSTALK vs. FREQUENCY
COM
20
= 3V
0.1
(HEADPHONE MODE)
(HEADPHONE MODE)
MAX9791 toc33
RIGHT TO LEFT
COM AND SENSE
DISABLED
FREQUENCY (kHz)
= 1µF, measurement BW
40
R
L
= 16Ω
1
R
L
HP_EN
2V/div
HP_
500mV/div
L
= 32Ω
= ∞, unless oth-
60
LEFT TO RIGHT
COM AND SENSE
R
FS = 300mV
V
L
IN
= 32Ω
= -20dBFS
10
80
RMS
100
100