MAX9792 MAXIM [Maxim Integrated Products], MAX9792 Datasheet - Page 9

• Manufacturer Part Number: MAX9792
• Description: Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers
• Manufacturer: MAXIM [Maxim Integrated Products]

(V
erwise specified. R
= 20kHz AES17, T
HP_EN = 1.)
Amplifiers with DirectDrive Headphone Amplifiers
0.001
AVDD
-100
-100
0.01
100
-50
-60
-70
-80
-90
-50
-60
-70
-80
-90
0.1
10
1
0.01
0.01
vs. OUTPUT POWER (HEADPHONE MODE)
TOTAL HARMONIC DISTORTION + NOISE
TOTAL HARMONIC DISTORTION + NOISE
TOTAL HARMONIC DISTORTION + NOISE
0
= V
vs. FREQUENCY (HEADPHONE MODE)
vs. FREQUENCY (HEADPHONE MODE)
R
V
V
R
V
V
R
L
IN
HPVDD
L
IN
HPVDD
L
10
f = 1kHz
= 16Ω
= 32Ω
= 16Ω
= -3dBFS
= -3dBFS
PVDD
f = 100Hz
FS = 300mV
20
= 3V
= 3V
0.1
0.1
OUTPUT POWER (mW)
= V
30
FS = 1V
FREQUENCY (kHz)
FREQUENCY (kHz)
A
FS = 1V
IN1
FS = 300mV
Windows Vista-Compliant Class D Speaker
= +25°C, unless otherwise noted. Speaker mode: SPKR_EN = 0, HP_EN = 0. Headphone mode: SPKR_EN = 1,
_______________________________________________________________________________________
HPVDD
RMS
40
= 20kΩ (A
RMS
1
1
RMS
50
RMS
= 5V, V
60
10
10
70
f = 6kHz
VSPKR
GND
80
100
100
90
= 12dB), R
= V
PGND
0.001
0.001
-100
0.01
0.01
100
100
-50
-60
-70
-80
-90
0.1
0.1
Typical Operating Characteristics (continued)
10
10
= V
1
1
IN2
0.01
vs. OUTPUT POWER (HEADPHONE MODE)
vs. OUTPUT POWER (HEADPHONE MODE)
0
0
TOTAL HARMONIC DISTORTION + NOISE
TOTAL HARMONIC DISTORTION + NOISE
TOTAL HARMONIC DISTORTION + NOISE
CPGND
vs. FREQUENCY (HEADPHONE MODE)
V
R
V
R
V
R
= 40.2kΩ (A
HPVDD
L
IN
L
HPVDD
L
f = 100Hz
= 16Ω
= 16Ω
= 32Ω
= -3dBFS
10
HEADPHONE
f = 1kHz
40
= 3V
= 3V
f = 6kHz
0.1
= 0, I
20
OUTPUT POWER (mW)
OUTPUT POWER (mW)
FREQUENCY (kHz)
FS = 1V
FS = 300mV
80
30
LDO_OUT
VHP
f = 1kHz
1
RMS
40
= 0dB), C
120
RMS
f = 100Hz
50
= 0, C
10
160
f = 6kHz
60
IN1
LDO
100
200
= 470nF, C
70
= 2 x 1µF, C1 = C2 = 1µF. R
0.001
-100
0.01
100
250
200
150
100
-50
-60
-70
-80
-90
0.1
10
50
1
0
IN2
0.01
vs. OUTPUT POWER (HEADPHONE MODE)
TOTAL HARMONIC DISTORTION + NOISE
TOTAL HARMONIC DISTORTION + NOISE
0
1
OUTPUT POWER vs. LOAD RESISTANCE
vs. FREQUENCY (HEADPHONE MODE)
f = 100Hz
R
V
R
= C
L
IN
L
= 32Ω
= 32Ω
= -3dBFS
COM
50
FS = 300mV
0.1
(HEADPHONE MODE)
LOAD RESISTANCE (Ω)
f = 1kHz
OUTPUT POWER (mW)
FREQUENCY (kHz)
= 1µF, measurement BW
FS = 1V
100
RMS
10
1
RMS
L
150
= ∞, unless oth-
THD+N = 10%
f = 1kHz
THD+N = 1%
10
200
f = 6kHz
100
250
100
9