Typical operating characteristics (continued) – Rainbow Electronics MAX98089 User Manual
Page 42
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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.)
FREQUENCY (Hz)
10k
1k
100
10
100k
GAIN vs. FREQUENCY
(DAC TO SPEAKER)
MAX98089 toc68
NORMALIZED GAIN (dB)
-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)
MAX98089 toc69
OUTPUT POWER PER CHANNEL (W)
EFFICIENCY (%)
1.5
1.0
0.5
10
20
30
40
50
60
70
80
90
100
0
0
2.0
V
SPK_VDD
= 4.2V
MCLK = 12.288MHz
LRCLK = 48kHz
NI MODE
AV
SKP_
= +8dB
Z
SPK
= 4I + 33µH
Z
SPK
= 8I + 68µH
1800
1400
600
1000
200
OUTPUT POWER PER CHANNEL (mW)
EFFICIENCY (%)
EFFICIENCY vs. OUTPUT
POWER (DAC TO SPEAKER)
MAX98089 toc70
10
20
30
40
50
60
75
80
90
100
0
V
SPK_VDD
= 4.2V
MCLK = 12.288MHz
LRCLK = 48kHz
NI MODE
AV
SKP_
= +8dB
Z
SPK
= 4I + 33µH
Z
SPK
= 8I + 68µH
1600
1200
400
800
0
2000
OUTPUT POWER PER CHANNEL (mW)
EFFICIENCY (%)
1400
1200
800 1000
400 600
200
0
1600
EFFICIENCY vs. OUTPUT POWER
(DAC TO SPEAKER)
MAX98089 toc71
10
20
30
40
50
60
70
80
90
100
0
Z
SPK
= 8I + 68uH
Z
SPK
= 4I + 33uH
MCLK = 12.288MHz
LRCLK = 48kHz
NI MODE
AV
SKP_
= +8dB
FREQUENCY (Hz)
1k
100k
PSRR (dB)
10k
100
10
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (DAC TO SPEAKER)
MAX98089 toc72
20
40
60
80
100
V
RIPPLE
= 200mV
P-P
RIPPLE ON SPKLVDD,
SPKRVDD
RIPPLE ON AVDD,
DVDD, HPVDD
120
0