Datasheet

MAX9700
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
= 8Ω
f = 1kHz
P
OUT
= 300mW
DIFFERENTIAL INPUT
EFFICIENCY vs. OUTPUT POWER
MAX9700toc11
OUTPUT POWER (W)
EFFICIENCY (%)
1.20.90.60.3
10
20
30
40
50
60
70
80
90
100
0
01.5
R
L
= 4Ω
R
L
= 8Ω
V
DD
= 3.3V
f = 1kHz
EFFICIENCY vs. OUTPUT POWER
MAX9700toc12
OUTPUT POWER (W)
EFFICIENCY (%)
2.01.50.5
10
20
30
40
50
60
70
80
90
100
0
03.0
R
L
= 8Ω
R
L
= 4Ω
V
DD
= 5V
f = 1kHz
1.0
2.5
1.2W, Low-EMI, Filterless,
Class D Audio Amplifier
_______________________________________________________________________________________ 5
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
= 8Ω
f = 1kHz
P
OUT
= MAX (THD+N = 1%)
R
L
= 4Ω
0
30
20
10
50
40
90
80
70
60
100
800 1000 1200 1400 18001600 2000
EFFICIENCY
vs. SYNC INPUT FREQUENCY
MAx9700 toc14
SYNC FREQUENCY (kHz)
EFFICIENCY (%)

V
DD
= 3.3V
f = 1kHz
P
OUT
= 300mW
R
L
= 8Ω
OUTPUT POWER vs.
SUPPLY VOLTAGE
MAX9700toc15
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
5.04.54.03.53.0
1.5
2.0
2.5
3.0
3.5
0
2.5 5.5
1.0
0.5
R
L
= 4Ω
THD+N = 10%
R
L
= 4Ω
THD+N = 1%
R
L
= 8Ω
THD+N = 10%
R
L
= 8Ω
THD+N = 1%
f = 1kHz
OUTPUT POWER vs. LOAD RESISTANCE
MAX9700toc16
LOAD RESISTANCE (Ω)
OUTPUT POWER (mW)
908070605040302010
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