Instruction Manual

MAX9756/MAX9757/MAX9758
2.3W Stereo Speaker Amplifiers and DirectDrive
Headphone Amplifiers with Automatic Level Control
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= PV
DD
= HPV
DD
= CPV
DD
= IN = +5.0V, GND = PGND = CPGND = 0, SHDN = V
DD
, REGEN = V
DD
, DR = SET = GND, C
BIAS
= 1µF, C
PVSS
= 1µF, C1 = C2 = 1µF, PREF = unconnected, speaker loads terminated between OUT_+ and OUT_-, headphone load
terminated between HP_ and GND, GAIN1 = GAIN2 = GAIN3 = VOL = 0 (A
V(SP)
= 15dB, A
V(HP)
= 0dB), T
A
= -40°C to +85°C, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Noise V
n
BW = 22Hz to 22kHz, unweighted,
measured at output, input at AC GND
71
µV
RMS
Capacitive-Load Drive C
L
No sustained oscillations
200
pF
Crosstalk L to R, R to L, f = 10kHz 80 dB
Slew Rate SR Measured between OUT_+ and OUT_- 1.3 V/µs
GAIN3 = 0 GAIN2 = 0 GAIN1 = 0 15
GAIN3 = 0 GAIN2 = 0 GAIN1 = 1
16.5
GAIN3 = 0 GAIN2 = 1 GAIN1 = 0 18
GAIN3 = 0 GAIN2 = 1 GAIN1 = 1
19.5
GAIN3 = 1 GAIN2 = 0 GAIN1 = 0 21
GAIN3 = 1 GAIN2 = 0 GAIN1 = 1
22.5
GAIN3 = 1 GAIN2 = 1 GAIN1 = 0
24.0
Gain (Maximum Volume Settings)
(Note 4)
A
VMAX
(SPKR)
GAIN3 = 1 GAIN2 = 1 GAIN1 = 1
25.5
dB
Into
shutdown
65
Click-and-Pop Level K
CP
Peak voltage, 32
samples/second,
A weighted (Note 5)
Out of
shutdown
38.5
dBV
HEADPHONE AMPLIFIERS (HPS = V
DD
)
Output Offset Voltage
V
OS
(
HP
)
T
A
= +25°C ±2 ±7 mV
HPV
DD
= 3V to 5.5V, T
A
= +25°C 70 90
f = 1kHz, V
RIPPLE
= 200mV
P-P
72
Power-Supply Rejection Ratio
(Note 2)
PSRR
f = 10kHz, V
RIPPLE
= 200mV
P-P
70
dB
R
L
= 32Ω 40 68
Output Power (Note 3) P
OUT
THD+N = 1%, f = 1kHz
(T
A
= +25°C)
R
L
= 16Ω
130
mW
R
L
= 32Ω, V
OUT
= 1V
RMS
, f = 1kHz
0.02
Total Harmonic Distortion Plus
Noise
THD+N
R
L
= 16Ω, V
OUT
= 1V
RMS
, f = 1kHz
0.04
%
R
L
= 32Ω, BTL P
OUT
= 65mW,
BW = 22Hz to 22kHz, unweighted
97
Signal-to-Noise Ratio SNR
R
L
= 32Ω, BTL P
OUT
= 65W,
BW = 22Hz to 22kHz, A weighted
100
dB
Noise V
n
BW = 22Hz to 22kHz
20.4
µV
RMS
Capacitive-Load Drive C
L
No sustained oscillations
200
pF
Crosstalk L to R, R to L, f = 10kHz 60 dB
Slew Rate SR 1.4 V/µs
GAIN2 = 0, HPS = 1 0
Gain (Maximum Volume Settings)
(Note 6)
A
VMAX
(
HP
)
GAIN2 = 1, HPS = 1 3.0
dB
Into shutdown 62
Click-and-Pop Level K
CP
Peak voltage, 32
samples/second,
A weighted (Note 4)
Out of shutdown
50
dBV