Rainbow Electronics MAX9792 - Manual (Page 9)

MAX9791/MAX9792
Windows Vista-Compliant Class D Speaker
Amplifiers with DirectDrive Headphone Amplifiers
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TOTAL HARMONIC DISTORTION + NOISE
vs. FREQUENCY (HEADPHONE MODE)
MAX9791 toc17
FREQUENCY (kHz)
THD+N (dBFS)
1
-80
-90
-70
-60
-100
0.01 100
FS = 300mV RMS
FS = 1V RMS
0.1 10
-50
R L = 16 Ω
V IN = -3dBFS
TOTAL HARMONIC DISTORTION + NOISE
vs. FREQUENCY (HEADPHONE MODE)
MAX9791 toc18
FREQUENCY (kHz)
THD+N (dBFS)
1
-80
-90
-70
-60
-100
0.01 100
FS = 300mV RMS
FS = 1V
RMS
0.1 10
-50
V HPVDD = 3V
R L = 16 Ω
V IN = -3dBFS
TOTAL HARMONIC DISTORTION + NOISE
vs. FREQUENCY (HEADPHONE MODE)
MAX9791 toc19
FREQUENCY (kHz)
THD+N (dBFS)
1
-80
-90
-70
-60
-100
0.01 100
FS = 300mV
RMS
FS = 1V RMS
0.1 10
-50
R L = 32 Ω
V IN = -3dBFS
TOTAL HARMONIC DISTORTION + NOISE
vs. FREQUENCY (HEADPHONE MODE)
MAX9791 toc20
FREQUENCY (kHz)
THD+N (dBFS)
1
-80
-90
-70
-60
-100
0.01 100
FS = 300mV RMS
FS = 1V RMS
0.1 10
-50
V HPVDD = 3V
R
L
= 32 Ω
V IN = -3dBFS
TOTAL HARMONIC DISTORTION + NOISE
vs. OUTPUT POWER (HEADPHONE MODE)
MAX9791 toc21
OUTPUT POWER (mW)
THD+N (%)
160
0.1
0.01
1
10
0.001
0 200
f = 6kHz
f = 1kHz
f = 100Hz
120 40 80
100
R L = 16 Ω
TOTAL HARMONIC DISTORTION + NOISE
vs. OUTPUT POWER (HEADPHONE MODE)
MAX9791 toc22
OUTPUT POWER (mW)
THD+N (%)
0.1
0.01
1
10
0.001
0 50 250
f = 6kHz
f = 1kHz
f = 100Hz
200 150 100
100
R L = 32 Ω
TOTAL HARMONIC DISTORTION + NOISE
vs. OUTPUT POWER (HEADPHONE MODE)
MAX9791 toc23
OUTPUT POWER (mW)
THD+N (%)
10
0.1
0.01
1
10
0.001
0 50 40 90
f = 6kHz f = 1kHz
f = 100Hz
80 70 60 30 20
100
V HPVDD = 3V
R L = 16 Ω
TOTAL HARMONIC DISTORTION + NOISE
vs. OUTPUT POWER (HEADPHONE MODE)
MAX9791 toc24A
OUTPUT POWER (mW)
THD+N (%)
10
0.1
0.01
1
10
0.001
0 50 40 70
f = 6kHz
f = 1kHz
f = 100Hz
60 30 20
100
V HPVDD = 3V
R L = 32 Ω
OUTPUT POWER vs. LOAD RESISTANCE
(HEADPHONE MODE)
MAX9791 toc25
LOAD RESISTANCE ( Ω)
OUTPUT POWER (mW)
10
50
150
250
0
100
200
1 100
f = 1kHz
THD+N = 10%
THD+N = 1%
Typical Operating Characteristics (continued)
(V AVDD = V PVDD = V HPVDD = 5V, V GND = V PGND = V CPGND = 0, I LDO_OUT = 0, C LDO = 2 x 1µF, C1 = C2 = 1µF. R L =
∞, unless oth-
erwise specified. R IN1 = 20k
Ω (A
VSPKR = 12dB), R IN2 = 40.2k
Ω (A
VHP = 0dB), C IN1 = 470nF, C IN2 = C COM = 1µF, measurement BW
= 20kHz AES17, T A = +25°C, unless otherwise noted. Speaker mode: SPKR_EN = 0, HP_EN = 0. Headphone mode: SPKR_EN = 1,
HP_EN = 1.)
HEADPHONE