max9712eub Maxim Integrated Products, Inc., max9712eub Datasheet - Page 5

• Manufacturer Part Number: max9712eub
• Description: Max9712 500mw, Low Emi, Filterless, Class D Audio Amplifier
• Manufacturer: Maxim Integrated Products, Inc.

(V
DD
1000
100
900
800
700
600
500
400
300
200
100
90
80
70
60
50
40
30
20
10
= 3.3V, V
0
0
2.5
0
f = 1kHz
THD+N = 1%
f = 1kHz
EFFICIENCY vs. SUPPLY VOLTAGE
10 20
3.0
R
L
SYNC
= 6Ω
vs. LOAD RESISTANCE
MAX9712
LOAD RESISTANCE (Ω)
SUPPLY VOLTAGE (V)
30
OUTPUT
3.5
OUTPUT POWER
V
DD
V
= GND, T
V
40
R
_______________________________________________________________________________________
DD
DD
L
= 5V
= 8Ω
= 3.3V
4.0
50
f = 217Hz
INPUT LOW = 3V
INPUT HIGH = 3.5V
GSM POWER-SUPPLY REJECTION
60
4.5
A
70
R
= +25°C, unless otherwise noted.)
L
= 16Ω
80
5.0
90
2ms/div
5.5
100
DUTY CYCLE = 88%
R
L
= 8Ω
-100
Typical Operating Characteristics (continued)
-10
-20
-30
-40
-50
-60
-70
-80
-90
100
MAX9712TOC19
90
80
70
60
50
40
30
20
10
0
0
800
10
500mW, Low EMI, Filterless,
INPUT REFERRED
V
COMMON-MODE REJECTION RATIO
IN
1000
= 200mV
500mV/div
100µV/div
vs. SYNC INPUT FREQUENCY
100
SYNC FREQUENCY (kHz)
1200
P-P
vs. FREQUENCY
EFFICIENCY
FREQUENCY (Hz)
Class D Audio Amplifier
1400
1k
1600
V
f = 1kHz
P
R
DD
OUT
L
10k
= 8Ω
= 3.3V
= 300mW
-100
-120
-140
1800
-20
-40
-60
-80
0
0
2000
100k
FFM MODE
V
f = 1kHz
R
UNWEIGHTED
OUT
L
OUTPUT FREQUENCY SPECTRUM
= 8Ω
= -60dBV
5k
-100
1000
-10
-20
-30
-40
-50
-60
-70
-80
-90
900
800
700
600
500
400
300
200
100
FREQUENCY (Hz)
0
0
2.5
10
f = 1kHz
10k
OUTPUT REFERRED
INPUTS AC GROUNDED
V
POWER-SUPPLY REJECTION RATIO
DD
= 3.3V
3.1
100
vs. SUPPLY VOLTAGE
15k
SUPPLY VOLTAGE (V)
OUTPUT POWER
R
vs. FREQUENCY
L
FREQUENCY (Hz)
= 6Ω
3.7
R
L
= 16Ω
1k
R
L
20k
= 8Ω
4.3
10k
4.9
100k
5.5
5