Instruction Manual

MAX9756/MAX9757/MAX9758
2.3W Stereo Speaker Amplifiers and DirectDrive
Headphone Amplifiers with Automatic Level Control
10 ______________________________________________________________________________________
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.)
LDO OUTPUT VOLTAGE ACCURACY
vs. TEMPERATURE
MAX7956 toc37
TEMPERATURE (
°
C)
DEVIATION (%)
603510-15
-4
-3
-2
-1
0
1
2
3
4
5
-5
-40 85
DROPOUT VOLTAGE
vs. LOAD CURRENT
MAX9756 toc38
LOAD CURRENT (mA)
DROPOUT VOLTAGE (V)
125100755025
-200
-100
0
100
200
300
-300
0150
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (LDO)
MAX9756 toc39
FREQUENCY (Hz)
PSRR (dB)
10k1k100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
10 100k
V
RIPPLE
= 100mV
P-P
LDO OUTPUT NOISE
MAX9756 toc40
200
μ
s/div
LDO_OUT
1mV/div
CROSSTALK vs. FREQUENCY
(LDO)
MAX9756 toc36
FREQUENCY (Hz)
CROSSTALK (dB)
1010.1
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-110
0.01 100
R
L
= 4
Ω
P
OUT(SPK)
= 1W
I
OUT
= 90mA
I
OUT
= 10mA
I
OUT
= 50mA