Stereo Audio CODEC
with FlexSound Technology
MAX9888
40
Typical Operating Characteristics (continued)
(VAVDD = VHPVDD = VDVDD = VDVDDS1 = VDVDDS2 = +1.8V, VSPKLVDD = VSPKRVDD = 3.7V. Speaker loads (ZSPK) connected
between SPK_P and SPK_N. Receiver load (RREC) connected between RECP and RECN. Headphone loads (RHP) connected from
HPL or HPR to GND. RHP = J, RREC = J, ZSPK = J, CREF = 2.2FF, CMICBIAS = CPREG = CREG = 1FF, CC1N-C1P = 1FF, CHPVSS
= 1FF. AVMICPRE_ = +20dB, AVMICPGA_ = 0dB, AVDACATTN = 0dB, AVDACGAIN = 0dB, AVADCLVL = 0dB, AVADCGAIN = 0dB,
AVPGAIN_ = 0dB, AVPGAOUT_ = 0dB, AVHP_ = 0dB, AVREC = 0dB, AVSPK_ = 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS =
1. TA = +25NC, unless otherwise noted.)
GAIN vs. FREQUENCY
(DAC TO SPEAKER)
MAX9888
toc61
NORMALIZED
GAIN
(dB)
-4
-3
-2
-1
0
1
2
3
4
5
-5
MCLK = 12.288MHz,
LRCLK = 48kHz
NI MODE
ZSPK = 8I + 68H
FREQUENCY (Hz)
10,000
1000
100
10
100,000
EFFICIENCY
(%)
10
20
30
40
50
60
70
80
90
100
0
EFFICIENCY vs. OUTPUT POWER
(DAC TO SPEAKER)
MAX9888
toc62
OUTPUT POWER PER CHANNEL (W)
0.5
1.0
1.5
2.0
0
2.5
VSPK_VDD = 4.2V
MCLK = 12.288MHz,
LRCLK = 48kHz
NI MODE
AVSPK_ = +8dB
ZSPK = 4I + 33H
ZSPK = 8I + 68H
EFFICIENCY vs. OUTPUT POWER
(DAC TO SPEAKER)
MAX9888
toc63
OUTPUT POWER PER CHANNEL (W)
1.4
1.2
0.8 1.0
0.4 0.6
0.2
0
1.6
EFFICIENCY
(%)
10
20
30
40
50
60
70
80
90
100
0
VSPK_VDD = 3.7V
MCLK = 12.288MHz,
LRCLK = 48kHz
NI MODE
AVSPK_ = +8dB
ZSPK = 4I + 33H
ZSPK = 8I + 68H
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(DAC TO SPEAKER)
MAX9888
toc64
SPK_VDD SUPPLY VOLTAGE (V)
SPK_VDD
SUPPLY
CURRENT
(mA)
5.0
4.5
4.0
3.5
3.0
5
10
15
20
25
30
0
2.5
5.5
MCLK = 12.288MHz,
LRCLK = 48kHz
ZSPK = 8I + 68H
NI MODE
AVSPK_ = +8dB
ALL ZEROS AT INPUT
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (DAC TO SPEAKER)
MAX9888
toc65
PSRR
(dB)
-80
-60
-40
-20
0
-100
FREQUENCY (Hz)
10,000
1000
100
10
100,000
VRIPPLE = 200mVP-P
RIPPLE ON SPKLVDD,
SPKRVDD
RIPPLE ON AVDD,
DVDD, HPVDD
POWER-SUPPLY REJECTION RATIO
vs. SUPPLY VOLTAGE (DAC TO SPEAKER)
MAX9888
toc66
SUPPLY VOLTAGE (V)
5.0
4.5
4.0
3.5
3.0
2.5
5.5
PSRR
(dB)
-80
-60
-40
-20
-100
0
RIPPLE ON SPKLVDD, SPKRVDD
VRIPPLE = 200mVP-P
f = 1kHz