Rainbow Electronics MAX98500 - Manual (Page 7)

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MAX98500
Boosted 2.2W Class D Amplifier
with Automatic Level Control
Typical Operating Characteristics (continued)
(V BAT = 3.6V, R L = ∞ between SPKP and SPKN, A V = +15.5dB, RKNEE = V BAT , 20Hz to 22kHz AC measurement bandwidth, unless
otherwise noted.)
SPEAKER POWER-SUPPLY REJECTION
RATIO vs. FREQUENCY
MAX98500 toc11
FREQUENCY (kHz)
PSRR (dB)
10 1 0.1
-80
-60
-40
-20
0
-100
0.01 100
V RIPPLE AT PVDD = 200mV P-P
INPUTS AC-COUPLED AGND
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
MAX98500 toc12
FREQUENCY (kHz)
CMRR (dB)
10 1 0.1
-80
-60
-40
-20
0
-100
0.01 100
A V = 6dB
A V = 20dB
A V = 15.5dB
Z LOAD = 8I + 68µH
SHUTDOWN RESPONSE
MAX98500 toc13
SPKR
OUTPUT
1V/div
0V
0V
40µs/div
SDSPK
2V/div
TURN-ON RESPONSE
MAX98500 toc14
SPKR
OUTPUT
1V/div 0V
0V
1ms/div
SDSPK
2V/div
SDBST = V BAT
CLIPPING RESPONSE
MAX98500 toc15
SPKR
OUTPUT
500mV/div
0V
200µs/div
THD+N = 10%
WIDEBAND OUTPUT SPECTRUM
MAX98500 toc16
FREQUENCY (MHz)
AMPLITUDE (dBV)
100 10 1
-80
-60
-40
-20
0
20
-100
0.1 1000
RBW = 100Hz
AUDIO INPUTS AC-GROUNDED
INBAND OUTPUT SPECTRUM
MAX98500 toc17
FREQUENCY (kHz)
AMPLITUDE (dBV)
15 10 5
-100
-80
-60
-40
-20
0
-120
0 20
f IN = 1kHz
OUTPUT = -60dBV