Rainbow Electronics MAX98088 - Manual (Page 52)

Stereo Audio Codec
with FLEXSOUND Technology
MAX98088
52
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.) (Note 1)
Speaker Bypass Switch
COMMON-MODE REJECTION RATIO
vs. FREQUENCY (LINE TO HEADPHONES)
MAX98088 toc122
100
0
FREQUENCY (Hz)
10,000 1000 100 10 100,000
CMRR (dB)
10
20
30
40
50
60
70
80
90
V OUT = -6dBV
C IN = 1µF
R HP = 32I
AV PREGAIN = 0dB
AV PREGAIN = 20dB
ON-RESISTANCE vs. V COM
(SPEAKER BYPASS SWITCH)
MAX98088 toc124
V COM (V)
R
ON
(I
)
5 4 1 2 3
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0
0 6
V SPK_VDD = 3.0V I SW = 20mA
V SPK_VDD = 3.7V
V SPK_VDD = 4.2V
V SPK_VDD = 5.0V
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
(SPEAKER BYPASS SWITCH)
OUTPUT POWER (W)
THD+N (dB)
0.20 0.15 0.05 0.10
-70
-60
-50
-40
-20
-30
-10
0
-80
0 0.25
MAX98088 toc123
RECEIVER AMPLIFIER
DRIVING LOUDSPEAKER
Z
SPK = 8I + 68µH
f = 1000kHz
f = 100Hz
f = 6000Hz
OFF-ISOLATION vs. FREQUENCY
(SPEAKER BYPASS SWITCH)
MAX98088 toc125
0
-120
FREQUENCY (Hz)
10,000 1000 100 10 100,000
OFF-ISOLATION (dB)
-100
-80
-60
-40
-20
SPEAKER AMP DRIVING LOUDSPEAKER
SPEAKER BYPASS SWITCH OPEN
MEASURED AT RXIN_
50I LOAD ON RXIN_
RECEIVER AMP DRIVING RXIN_