Rainbow Electronics MAX9792 - Manual (Page 3)

MAX9791/MAX9792
Windows Vista-Compliant Class D Speaker
Amplifiers with DirectDrive Headphone Amplifiers
_______________________________________________________________________________________ 3
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SPEAKER AMPLIFIER
R L = 4 Ω
(MAX9791)
1.7
R L = 8 Ω
(MAX9791)
1.2
THD+N = 1%,
f = 1kHz,
T
A = +25 °C
(Note 4)
R L = 3 Ω
(MAX9792)
3
R L = 4 Ω
(MAX9791)
2.2
R L = 8 Ω
(MAX9791)
1.5
Output Power P OUT
THD+N = 10%,
f = 1kHz,
T
A = +25 °C
(Note 4)
R L = 3 Ω
(MAX9792)
3.7
W
R L = 8 Ω, P
OUT = 500mW, f = 1kHz (Note 4) 0.04 Total Harmonic Distortion Plus
Noise
THD+N
R
L
= 4 Ω, P
OUT
= 500mW, f = 1kHz (Note 4) 0.03
%
V AVDD = V PVDD = 4.5V to 5.5V, T A = +25 °C 60 80
f = 217Hz, 200mV P-P 73
f = 1kHz, 200mV P-P 75
Power-Supply Rejection Ratio PSRR
f = 10kHz, 200mV P-P 62
dB
Feedback Impedance R FSKR Guaranteed by design 20 k Ω
Gain A V R IN1 = 20k Ω 12 dB
Output Offset Voltage V OS
Measured between OUT_+ and OUT_-,
T
A = +25 °C
±3 ±10 mV
Into shutdown -52.4
Click-and-Pop Level K CP
R L = 8 Ω,
peak voltage,
A-weighted,
32 samples per second
(Notes 4, 5, and 6)
Out of
shutdown
-54
dBV
A-weighted 98
Signal-to-Noise Ratio SNR
R L = 8 Ω
P OUT = 1.2W f IN = 1kHz,
(Note 4) 20Hz to 20kHz 94
dB
Noise V N A-weighted 38 µV RMS
L to R, R to L, R L = 8 Ω, V
I N = - 20d BFS =
100m V R M S , f I N = 1kH z ( N ote 4)
78
L to R, R to L, R L = 8 Ω, V
I N = - 20d BFS =
100m V R M S , f I N = 15kH z ( N ote 4)
70 Crosstalk
HP to SPKR, R LSPKR = 8 Ω, P
HP = 20mW,
R LHP = 32 Ω, f
IN = 1kHz (Note 4)
77
dB
ELECTRICAL CHARACTERISTICS (continued)
(V AVDD = V PVDD = V HPVDD = 5V, V GND = V PGND = V CPGND = 0, I LDO_OUT = 0, C LDO = 2µF, C1 = C2 = 1µF. R L =
∞, unless other-
wise specified. R IN1 = 20k
Ω (A
VSPKR = 12dB), R IN2 = 40.2k
Ω (A
VHP = 0dB), C IN1 = 470nF, C IN2 = C COM = 1µF, T A = T MIN to T MAX ,
unless otherwise noted. Typical values are at T A = +25°C.) (Note 3)