Rainbow Electronics MAX98089 - Manual (Page 54)

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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.)
Speaker Bypass Switch
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
MAX98089 toc126
RECEIVER AMPLIFIER
DRIVING LOUDSPEAKER
Z
SPK = 8I + 68µH
f = 1000kHz
f = 100Hz
f = 6000Hz
OFF-ISOLATION vs. FREQUENCY
(SPEAKER BYPASS SWITCH)
MAX98089 toc128
0
-120
FREQUENCY (Hz)
10k 1k 100 10 100k
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_
ON-RESISTANCE vs. V COM
(SPEAKER BYPASS SWITCH)
MAX98089 toc127
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