Rainbow Electronics MAX98088 - Manual (Page 41)

Stereo Audio Codec
with FLEXSOUND Technology
MAX98088
41
Typical Operating Characteristics (continued)
(V AVDD = V PVDD = V DVDD = V DVDDS1 = V DVDDS2 = +1.8V, V SPKLVDD = V SPKRVDD = 3.7V. Speaker loads (Z SPK ) connected
between SPK_P and SPK_N. Receiver load (R REC ) connected between RECP and RECN. Headphone loads (R HP ) connected
from HPL or HPR to HPGND. R HP = J, R REC = J, Z SPK = J, C REF = 2.2FF, C MICBIAS = C REG = 1FF, C C1N-C1P = 1FF, C HPVDD =
C
HPVSS
= 1FF. AV
MICPRE_
= +20dB, AV
MICPGA_
= 0dB, AV
DACATTN
= 0dB, AV
DACGAIN
= 0dB, AV
ADCLVL
= 0dB, AV
ADCGAIN
=
0dB, AV PGAIN_ = 0dB, AV HP_ = 0dB, AV REC = 0dB, AV SPK_ = 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. T A = +25NC,
unless otherwise noted.)
OUTPUT POWER vs. SUPPLY VOLTAGE
(DAC TO SPEAKER)
MAX98088 toc67
SUPPLY VOLTAGE (V)
OUTPUT POWER PER CHANNEL (mW)
5.0 4.5 3.0 3.5 4.0
500
1000
1500
2000
2500
3000
3500
4000
0
2.5 5.5
MCLK = 12.288MHz
LRCLK = 48kHz
NI MODE
Z
SPK_ = 4I + 33µH
AV SPK_ = +8dB
THD+N = 1%
THD+N = 10%
GAIN vs. FREQUENCY
(DAC TO SPEAKER)
MAX98088 toc68
FREQUENCY (Hz)
NORMALIZED GAIN (dBrA)
10,000 1000 100 100,000
-4
-3
-2
-1
0
1
2
3
4
5
-5
MCLK = 12.288MHz
LRCLK = 48kHz
NI MODE
Z
SPK_ = 8I + 68µH
EFFICIENCY vs. OUTPUT POWER
(DAC TO SPEAKER)
MAX98088 toc69
OUTPUT POWER (W)
EFFICIENCY (%)
2.0 1.5 1.0 0.5
10
20
30
40
50
60
70
80
90
100
0
0 2.5
Z SPK = 8I + 68µH
Z SPK = 4I + 33µH
V SPK_VDD = 4.2V
MCLK = 12.288MHz
LRCLK = 48kHz
NI MODE
AV SKP_ = +8dB
EFFICIENCY vs. OUTPUT POWER
(DAC TO SPEAKER)
MAX98088 toc70
OUTPUT POWER (W)
EFFICIENCY (%)
1.4 1.2 0.8 1.0 0.4 0.6 0.2
10
20
30
40
50
60
70
80
90
100
0
0 1.6
Z SPK = 8I + 68µH
Z SPK = 4I + 33µH
V SPK_VDD = 3.7V
MCLK = 12.288MHz
LRCLK = 48kHz
NI MODE
AV SKP_ = +8dB
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(DAC TO SPEAKER)
MAX98088 toc71
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.0 4.5 4.0 3.5 3.0
3
6
9
12
15
18
0
2.5 5.5
MCLK = 12.288MHz
LRCLK = 48kHz
NI MODE
Z
SPK_ = 8I + 68µH
SPKVOL_ = +8dB
ALL ZEROS AT INPUT
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (DAC TO SPEAKER)
MAX98088 toc72
FREQUENCY (Hz)
PSRR (dB)
10,000 1000 100
-70
-60
-50
-40
-30
-20
-10
0
-80
10 100,000
V RIPPLE = 200mV P-P
RIPPLE ON AVDD,
DVDD, HPVDD
RIPPLE ON SPKLVDD,
SPKRVDD