Rainbow Electronics MAX9700 - Manual (Page 5)

MAX9700
1.2W, Low-EMI, Filterless,
Class D Audio Amplifier
_______________________________________________________________________________________ 5
Typical Operating Characteristics (continued)
(V DD = 3.3V, SYNC = GND (SSM), T A = +25°C, unless otherwise noted.)
10
0 0.5 1.0 1.5 2.0 2.5 3.0
1
0.1
0.01
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. COMMON-MODE VOLTAGE
MAX9700 toc10
COMMON-MODE VOLTAGE (V)
THD+N (%)
V DD = 3.3V
R L = 8 Ω
f = 1kHz
P
OUT = 300mW
DIFFERENTIAL INPUT
EFFICIENCY vs. OUTPUT POWER
MAX9700toc11
OUTPUT POWER (W)
EFFICIENCY (%)
0.8 0.6 0.4 0.2
10
20
30
40
50
60
70
80
90
100
0
0 1.0
R L = 6 Ω
R L = 8 Ω
V DD = 3.3V
f = 1kHz
EFFICIENCY vs. OUTPUT POWER
MAX9700toc12
OUTPUT POWER (W)
EFFICIENCY (%)
1.5 1.0 0.5
10
20
30
40
50
60
70
80
90
100
0
0 2.0
R L = 6 Ω
R L = 8 Ω
V DD = 5V
f = 1kHz
0
30
20
10
50
40
90
80
70
60
100
2.5 3.0 3.5 4.0 4.5 5.0 5.5
EFFICIENCY vs. SUPPLY VOLTAGE
MAX9700 toc13
SUPPLY VOLTAGE (V)
EFFICIENCY (%)
R L = 8 Ω
f = 1kHz
R L = 6 Ω
0
30
20
10
50
40
90
80
70
60
100
800 1000 1200 1400 1800 1600 2000
EFFICIENCY
vs. SYNC INPUT FREQUENCY
MAx9700 toc14
SYNC FREQUENCY (kHz)
EFFICIENCY (%)
V DD = 3.3V
f = 1kHz
P
OUT = 300mW
R L = 8 Ω
OUTPUT POWER vs.
SUPPLY VOLTAGE
MAX9700toc15
SUPPLY VOLTAGE (V)
OUTPUT POWER (mW)
5.0 4.5 4.0 3.5 3.0
500
1000
1500
2000
2500
0
2.5 5.5
R L = 6 Ω
THD+N = 1%
f = 1kHz
R L = 6 Ω
THD+N = 10%
R L = 8 Ω
THD+N = 10%
R L = 8 Ω
THD+N = 1%
OUTPUT POWER vs. LOAD RESISTANCE
MAX9700toc16
LOAD RESISTANCE ( Ω)
OUTPUT POWER (mW)
90 80 70 60 50 40 30 20 10
400
800
1200
1600
2000
0
0 100
V DD = 5V
f = 1kHz
THD+N = 1%
V DD = 3.3V
0
-100
10 100 1k 10k 100k
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
-80
MAX9700TOC17
FREQUENCY (Hz)
CMRR (dB)
-60
-40
-20
-30
-50
-70
-90
-10
INPUT REFERRED
V
IN = 200mV P-P
0
-100
10 100 1k 10k 100k
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
-80
MAX9700TOC18
FREQUENCY (Hz)
PSRR (dB) -60
-40
-20
-30
-50
-70
-90
-10
OUTPUT REFERRED
INPUTS AC GROUNDED
V
DD = 3.3V