Typical operating characteristics (continued) – Rainbow Electronics MAX98089 User Manual
Page 29
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MAX98089
Low-Power, Stereo Audio Codec
with FlexSound Technology
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. Line out (R
LOUT
) connected from LOUTL or LOUTR to SPKLGND, 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.)
GAIN vs. FREQUENCY (MIC TO ADC)
MAX98089 toc07
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
1k
100
10
10k
0
10
MCLK = 13MHz
LRCLK = 8kHz
FREQ MODE
V
IN
= 1V
P-P
AV
MICPRE_
= 0dB
MODE = 1
MODE = 0
-90
-80
-70
-60
-50
-40
-30
-20
-10
FFT, 0dBFS (MIC TO ADC)
MAX98089 toc10
FREQUENCY (kHz)
AMPLITUDE (dBFS)
-160
-140
-120
-100
-80
-60
-40
-20
0
20
-180
0
3
2
1
4
MCLK = 13MHz
LRCLK = 8kHz
FREQ MODE
AV
MICPRE
= 0dB
COMMON-MODE REJECTION
RATIO vs. FREQUENCY (MIC TO ADC)
MAX98089 toc08
FREQUENCY (Hz)
90
10
CMRR (dB)
0
10
20
30
40
50
60
70
80
1k
100
10k
MCLK = 13MHz
LRCLK = 8kHz
FREQ MODE
V
IN
= 1V
P-P
C
IN
= 1µF
AV
PRE
= 20dB
AV
PRE
= 30dB
AV
PRE
= 0dB
FFT, -60dBFS (MIC TO ADC)
MAX98089 toc11
-160
-140
-120
-100
-80
-60
-40
-20
0
-180
FREQUENCY (Hz)
3.5k
3k
2k 2.5k
1k 1.5k
500
0
4k
AMPLITUDE (dBFS)
MCLK = 13MHz
LRCLK = 8kHz
FREQ MODE
AV
MICPRE_
= 0dB
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (MIC TO ADC)
MAX98089 toc09
FREQUENCY (Hz)
PSRR (dB)
10k
1k
100
20
40
60
80
100
120
0
10
100k
MCLK = 12.288MHz
LRCLK = 48kHz
NI MODE
AV
MICPRE
= 0dB
C
IN
= 1µF
V
RIPPLE
= 200mV
P-P
RIPPLE ON SPKLVDD, SPKRVDD
RIPPLE ON AVDD, DVDD, HPVDD
FFT, 0dBFS (MIC TO ADC)
MAX98089 toc12
FREQUENCY (kHz)
AMPLITUDE (dBFS)
15
10
5
-120
-100
-80
-60
-40
-20
0
20
-140
0
20
MCLK = 13MHz
LRCLK = 44.1kHz
PLL MODE
AV
MICPRE_
= 0dB
C
IN
= 1µF