max9791 Maxim Integrated Products, Inc., max9791 Datasheet - Page 14

• 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.)
14
AVDD
-0.5
-1.0
-1.5
-2.0
300
250
200
150
100
2.0
1.5
1.0
0.5
50
0
0
______________________________________________________________________________________
0
0
= V
LDO_OUT = 4.75V
LDO DROPOUT VOLTAGE vs. LOAD
PVDD
50
25
LDO OUTPUT ACCURACY
vs. LOAD CURRENT
LOAD CURRENT (mA)
100
= V
50
A
IN1
I
= +25°C, unless otherwise noted. Speaker mode: SPKR_EN = 0, HP_EN = 0. Headphone mode: SPKR_EN = 1,
LOAD
HPVDD
150
= 20kΩ (A
75
(mA)
200
= 5V, V
100
VSPKR
250
125
GND
150
300
= 12dB), R
= V
PGND
-100
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
-20
-40
-60
-80
40
20
0
0
Typical Operating Characteristics (continued)
= V
0.01
IN2
0
V
I
POWER-SUPPLY REJECTION RATIO
LOAD
CPGND
RIPPLE
vs. AMPLIFIER OUTPUT POWER
= 40.2kΩ (A
LDO_OUT = 4.74V
AMPLIFIER OUTPUT POWER (mW)
= 10mA
300
LDO OUTPUT ACCURACY
= 200mV
0.1
vs. FREQUENCY LDO
= 0, I
FREQUENCY (kHz)
600
P-P
LDO
LDO_OUT
VHP
1
900
= 0dB), C
LDO_OUT = 3.3V
10
= 0, C
1200
IN1
LDO
1500
100
= 470nF, C
= 2 x 1µF, C1 = C2 = 1µF. R
-0.5
-1.0
200
175
150
125
100
1.0
0.5
75
50
0
IN2
0.01
-40
= C
-15
COM
LDO OUTPUT ACCURACY
LDO_OUT = 3.3V
0.1
vs. TEMPERATURE
LDO OUTPUT NOISE
TEMPERATURE (°C)
LDO_OUT = 4.75V
FREQUENCY (kHz)
= 1µF, measurement BW
10
1
L
35
= ∞, unless oth-
C
I
LOAD
LOAD
10
= 120mA
60
= 2 x 1μF
100
85