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Stereo Audio CODEC
with FlexSound Technology
MAX9888
29
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 (MIC TO ADC)
MAX9888
toc07
FREQUENCY (Hz)
NORMALIZED
GAIN
(dB)
1000
100
-75
-65
-55
-45
-35
-25
-15
-5
5
-85
10
10,000
MCLK = 13MHz
LRCLK = 8kHz
FREQ MODE
VIN = 1VP-P
AVMICPRE_ = 0dB
MODE = 0
MODE = 1
COMMON-MODE REJECTION
RATIO vs. FREQUENCY (MIC TO ADC)
MAX9888
toc08
FREQUENCY (Hz)
CMRR
(dB)
10,000
1000
100
10
20
30
40
50
60
70
80
90
0
10
100,000
AVMICPRE_ = +30dB
AVMICPRE_ = +20dB
AVMICPRE_ = 0dB
VOUT, DIFF = 0dBFS
POWER-SUPPLY REJECTION
RATIO vs. FREQUENCY (MIC TO ADC)
MAX9888
toc09
FREQUENCY (Hz)
PSRR
(dB)
10,000
1000
100
-100
-80
-60
-40
-20
0
-120
10
100,000
VRIPPLE = 200mVP-P
INPUTS AC GROUNDED
RIPPLE ON
SPKLVDD, SPKRVDD
RIPPLE ON AVDD,
DVDD, HPVDD
FFT, 0dBFS (MIC TO ADC)
MAX9888
toc10
FREQUENCY (Hz)
AMPLITUDE
(dBV)
3500
3000
2500
2000
1500
1000
500
-120
-100
-80
-60
-40
-20
0
-140
0
4000
MCLK = 13MHz
LRCLK = 8kHz
FREQ MODE
AVMICPRE_ = 0dB
FFT, -60dBFS (MIC TO ADC)
MAX9888
toc11
FREQUENCY (Hz)
AMPLITUDE
(dBV)
3500
3000
2500
2000
1500
1000
500
-120
-100
-80
-60
-40
-20
0
-140
0
4000
MCLK = 13MHz
LRCLK = 8kHz
FREQ MODE
AVMICPRE_ = 0dB
FFT, 0dBFS (MIC TO ADC)
MAX9888
toc12
FREQUENCY (Hz)
AMPLITUDE
(dBV)
15,000
10,000
5000
-120
-100
-80
-60
-40
-20
0
-140
0
20,000
MCLK = 13MHz
LRCLK = 44.1kHz
PLL MODE
AVMICPRE_ = 0dB