Typical operating characteristics – Rainbow Electronics MAX9758 User Manual
Page 6
MAX9756/MAX9757/MAX9758
2.3W Stereo Speaker Amplifiers and DirectDrive
Headphone Amplifiers with Automatic Level Control
6
_______________________________________________________________________________________
Typical Operating Characteristics
(V
DD
= PV
DD
= HPV
DD
= CPV
DD
= IN = +5.0V, GND = PGND = CPGND = 0V,
SHDN = V
DD
, REGEN = DR = SET = GND, C
BIAS
=
1µF, C
PVSS
= 1µF, C1 = C2 = 1µF, PREF = unconnected, GAIN1 = 1, GAIN2 = GAIN3 = VOL = 0V, measurement BW = 22Hz to
22kHz, T
A
= +25°C, unless otherwise noted.)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)
MAX9756 toc01
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.01
0.1
1
10
0.001
10
100k
V
DD
= 5V
R
L
= 3
Ω
OUTPUT POWER = 500mW
OUTPUT POWER = 1.8W
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)
MAX9756 toc02
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.01
0.1
1
10
0.001
10
100k
V
DD
= 5V
R
L
= 4
Ω
OUTPUT POWER = 500mW
OUTPUT POWER = 1.5W
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (HEADPHONE MODE)
MAX9756 toc03
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.01
0.1
1
10
0.001
10
100k
V
DD
= 5V
R
L
= 8
Ω
OUTPUT POWER = 500mW
OUTPUT POWER = 1W
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
MAX9756 toc04
OUTPUT POWER (W)
THD+N (%)
3.0
2.5
2.0
1.5
1.0
0.5
0.01
0.1
1
10
100
0.001
0
3.5
V
DD
= 5V
R
L
= 3
Ω
f
IN
= 100Hz
f
IN
= 1kHz
f
IN
= 10kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
MAX9756 toc05
OUTPUT POWER (W)
THD+N (%)
3.0
2.5
2.0
1.5
1.0
0.5
0.01
0.1
1
10
100
0.001
0
3.5
V
DD
= 5V
R
L
= 4
Ω
f
IN
= 100Hz
f
IN
= 1kHz
f
IN
= 10kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)
MAX9756 toc06
OUTPUT POWER (W)
THD+N (%)
1.5
1.0
0.5
0.01
0.1
1
10
100
0.001
0
2.0
V
DD
= 5V
R
L
= 8
Ω
f
IN
= 100Hz
f
IN
= 1kHz
f
IN
= 10kHz
OUTPUT POWER
vs. LOAD RESISTANCE (SPEAKER MODE)
MAX9756 toc07
LOAD RESISTANCE (
Ω)
OUTPUT POWER (W)
10
0.5
1.0
1.5
2.0
2.5
3.0
0
1
100
V
DD
= 5V
f = 1kHz
THD+N = 10%
THD+N = 1%
POWER DISSIPATION vs. OUTPUT POWER
(SPEAKER MODE)
MAX9756 toc08
OUTPUT POWER (W)
POWER DISSIPATION (W)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.5
1.0
1.5
2.0
2.5
3.0
0
0
4.0
f = 1kHz
P
OUT
= P
OUTL
+ P
OUTR
R
L
= 8
Ω
R
L
= 4
Ω
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (SPEAKER MODE)
MAX9756 toc09
FREQUENCY (Hz)
PSRR (dB)
10k
1k
100
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-120
10
100k
V
RIPPLE
= 200mV
P-P
R
L
= 8
Ω