Low-Power, Stereo Audio Codec
with FlexSound Technology
Typical Operating Characteristics (continued)
(VAVDD = VPVDD = 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 HPGND. Line out (RLOUT) connected from LOUTL or LOUTR to SPKLGND, CREF = 2.2FF, CMICBIAS = CREG = 1FF, CC1N-C1P =
1FF, CHPVDD = CHPVSS = 1FF. AVMICPRE_ = +20dB, AVMICPGA_ = 0dB, AVDACATTN = 0dB, AVDACGAIN = 0dB, AVADCLVL = 0dB,
AVADCGAIN = 0dB, AVPGAIN_ = 0dB, AVHP_ = 0dB, AVREC = 0dB, AVSPK_ = 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. TA
= +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
ZSPK = 8I + 68H
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. VCOM
(SPEAKER BYPASS SWITCH)
MAX98089
toc127
VCOM (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
06
VSPK_VDD = 3.0V
ISW = 20mA
VSPK_VDD = 3.7V
VSPK_VDD = 4.2V
VSPK_VDD = 5.0V
Maxim Integrated
54
MAX98089