Rainbow Electronics MAX9758 - Manual (Page 8)

MAX9756/MAX9757/MAX9758
2.3W Stereo Speaker Amplifiers and DirectDrive
Headphone Amplifiers with Automatic Level Control
8 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(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. OUTPUT POWER (HEADPHONE MODE)
MAX9756 toc19
OUTPUT POWER (mW)
THD+N (%)
100 80 60 40 20
0.01
0.1
1
10
100
0.001
0 120
HPV DD = 3.3V
R L = 16 Ω
f IN = 100Hz
f IN = 10kHz
f IN = 1kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (HEADPHONE MODE)
MAX9756 toc20
OUTPUT POWER (mW)
THD+N (%)
80 90 70 40 50 60 30 10 20
0.01
0.1
1
10
100
0.001
0 100
HPV DD = 3.3V
R L = 32 Ω
f IN = 100Hz
f IN = 1kHz
f IN = 10kHz
OUTPUT POWER vs. LOAD RESISTANCE
(HEADPHONE MODE)
MAX9756 toc21
LOAD RESISTANCE ( Ω)
OUTPUT POWER (mW)
100
20
40
60
80
100
120
140
0
10 1000
HPV DD = 3.3V
f = 1kHz
THD+N = 10%
THD+N = 1%
OUTPUT POWER vs. LOAD RESISTANCE
(HEADPHONE MODE)
MAX9756 toc22
LOAD RESISTANCE ( Ω)
OUTPUT POWER (mW)
100
20
40
60
80
100
120
140
160
180
200
0
10 1000
HPV DD = 5V
f = 1kHz
THD+N = 10%
THD+N = 1%
POWER DISSIPATION vs. OUTPUT POWER
(HEADPHONE MODE)
MAX9756 toc23
OUTPUT POWER (mW)
POWER DISSIPATION (mW)
225 200 175 150 125 100 75 50 25
0.2
0.4
0.6
0.8
0
0 250
f = 1kHz
P
OUT = P HL + P HR R L = 16 Ω
R L = 32 Ω
OUTPUT POWER vs. SUPPLY VOLTAGE
(HEADPHONE MODE)
MAX9756 toc24
SUPPLY VOLTAGE (V)
OUTPUT POWER (mW)
5.0 4.5 4.0 3.5
10
20
30
40
50
60
70
80
90
100
110
120
130
140
0
3.0 5.5
R L = 16 Ω
R
L
= 32 Ω
THD+N = 1%
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (HEADPHONE MODE)
MAX9756 toc25
FREQUENCY (Hz)
PSRR (dB)
10k 1k 100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
10 100k
V
RIPPLE
= 100mV
P-P
INPUTS AC-GROUNDED
HPV
DD
= 5V
HPV DD = 3.3V
CROSSTALK vs. FREQUENCY
(HEADPHONE MODE)
MAX9756 toc26
FREQUENCY (Hz)
CROSSTALK (dB)
10 1 0.1
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-110
0.01 100
R L = 32 Ω
f = 1kHz
V
IN = 200mV P-P
RIGHT TO LEFT
LEFT TO RIGHT
OUTPUT POWER vs. CHARGE-PUMP
CAPACITANCE (HEADPHONE MODE)
MAX9756 toc27
LOAD ( Ω)
OUTPUT POWER (mW)
30 25 20 15 35 40 45
40
30
50
60
70
80
90
100
120
110
130
140
150
20
10 50
C1 = C2 = 1 μF
C1 = C2 = 2.2 μF
f = 1kHz
THD+N = 1%