User guide

MAX9750/MAX9751/MAX9755
2.6W Stereo Audio Power Amplifiers and
DirectDrive Headphone Amplifiers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= PV
DD
= CPV
DD
= HPV
DD
= 5V, GND = PGND = CPGND = 0V, SHDN = V
DD
, C
BIAS
= 1µF, C1 = C2 = 1µF, speaker load
terminated between OUT_+ and OUT_-, headphone load terminated between HPOUT_ and GND, GAIN1 = GAIN2 = VOL = GAIN = 0V,
T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
MAX9750A/
MAX9750B/
MAX9751/
MAX9755
0.9 1.4
R
L
= 8Ω
MAX9750C 0.65
0.8
MAX9750A/
MAX9750B/
MAX9751/
MAX9755
2.3
R
L
= 4Ω
MAX9750C
1.2 1.5
MAX9750A/
MAX9750B/
MAX9751/
MAX9755
2.6
Output Power (Note 4) P
OUT
THD+N = 1%,
f = 1kHz,
T
A
= +25°C
R
L
= 3Ω
MAX9750C
2.2
W
R
L
= 8Ω, P
OUT
= 500mW, f = 1kHz
0.01
Total Harmonic Distortion Plus
Noise
THD+N
R
L
= 4Ω, P
OUT
= 1W, f = 1kHz
0.02
%
Signal-to-Noise Ratio SNR
R
L
= 8Ω, P
OUT
= 500mW, BW = 22Hz to
22kHz
90 dB
Noise V
n
BW = 22Hz to 22kHz, A-weighted 80
µV
RMS
Capacitive-Load Drive C
L
No sustained oscillations
200
pF
Crosstalk L to R, R to L, f = 10kHz 75
Off-Isolation
Any unselected input to any active input,
f = 10kHz (MAX9751), input referred
75
dB
Slew Rate SR 1.4 V/µs
GAIN1 = 0, GAIN2 = 0 9
GAIN1 = 1, GAIN2 = 0
10.5
GAIN1 = 0, GAIN2 = 1 12
MAX9750A
GAIN1 = 1, GAIN2 = 1
13.5
GAIN1 = 0, GAIN2 = 0 15
GAIN1 = 1, GAIN2 = 0
16.5
GAIN1 = 0, GAIN2 = 1 18
MAX9750B
GAIN1 = 1, GAIN2 = 1
19.5
GAIN1 = 0, GAIN2 = 0 6
GAIN1 = 1, GAIN2 = 0 7.5
GAIN1 = 0, GAIN2 = 1 9
Gain (Maximum Volume Setting)
A
VMAX
(
SPKR
)
MAX9750C
GAIN1 = 1, GAIN2 = 1
10.5
dB
GAIN = 1 9
Gain (MAX9751/MAX9755) A
V
GAIN = 0
10.5
dB