MAX97000 Datasheet, PDF (14/33 Pages) Maxim Integrated Products – Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifier

Audio Subsystem with Mono Class D
Speaker and Class H Headphone Amplifier
Typical Operating Characteristics (continued)
(VLDOIN = VPVDD = 3.7V, VGND = VPGND = 0V. Single-ended inputs, preamp gain = 0dB, HPLVOL = HPRVOL = SPKVOL = 0dB. Speaker
loads (ZSPK) connected between OUTP and OUTN. Headphone loads (RHP) connected from HPL or HPR to GND. ZSPK = ∞, RHP = ∞.
CC1P-C1N = CHPVDD = CHPVSS = CBIAS = 1μF. TA = +25°C, unless otherwise noted.)
HEADPHONE AMPLIFIER
THD+N vs. FREQUENCY
10
RLOAD = 32I
THD+N vs. FREQUENCY
10
RLOAD = 16I
THD+N vs. OUTPUT POWER
10
RLOAD = 32I
1
1
1
0.1
POUT = 25mW
0.1
POUT = 30mW
fIN = 1kHz
0.1
fIN = 6kHz
0.01
POUT = 5mW
0.001
0.01
0.1
1
10
100
FREQUENCY (kHz)
THD+N vs. OUTPUT POWER
10
RLOAD = 16I
1
fIN = 1kHz
0.1
fIN = 6kHz
0.01
fIN = 100Hz
0.001
0
10 20 30 40 50 60 70 80
OUTPUT POWER (mW)
OUTPUT POWER vs. LOAD RESISTANCE
70
fIN = 1kHz
60 ^{THD+N = 1%}
C_{CHARGE_PUMP} = 2.2µF
50
C_{CHARGE_PUMP} = 1µF
40
30
20
CCHARGE_PUMP = 0.47µF
10
0
1
10
100
1000
LOAD RESISTANCE (I)
14
0.01
POUT = 10mW
0.001
0.01
0.1
1
10
100
FREQUENCY (kHz)
POWER DISSIPATION
vs. OUTPUT POWER
180
fIN = 1kHz
160 _{POUT = PHPL + PHPR}
140
120
RLOAD = 16I
100
80
60
RLOAD = 32I
40
20
0
0 10 20 30 40 50 60 70 80 90
OUTPUT POWER (mW)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
0
VRIPPLE = 200mVP-P
INPUTS AC-COUPLED GND
-20
-40
-60
-80
-100
0.01
0.1
1
10
100
FREQUENCY (kHz)
0.01
fIN = 100Hz
0.001
0 10 20 30 40 50 60
OUTPUT POWER (mW)
OUTPUT POWER vs. LOAD RESISTANCE
80
fIN = 1kHz
70
THD+N = 10%
60
50
40
THD+N = 1%
30
20
10
0
1
10
100
1000
LOAD RESISTANCE (I)
OUTPUT SPECTRUM
0
RLOAD = 32I
-20 _{fIN = 1kHz}
-40
-60
-80
-100
-120
-140
-160
0 4 8 12 16 20 24
FREQUENCY (kHz)