Datasheet

Typical Operating Characteristics (continued)
(V
AVDD
= +1.8V, V
DVDD
= V
DVDDIO
= +1.8V, R
L
= ∞, headphone load (R
L
) connected between OUTP and OUTN, C
REF
= 2.2µF,
C
PREG
= C
REG
= 1µF, C
MICBIAS
= 1µF A
VMICPGA
= 0dB, A
VPRE
= +20dB, f
MCLK
= 13MHz, T
A
= +25°C, unless otherwise noted.)
HEADPHONE STARTUP WAVEFORM
MAX9860 toc28
TIME (4ms/div)
SPK+ -SPK-
(1V/div)
SDA
(2V/div)
HEADPHONE SHUTDOWN WAVEFORM
MAX9860 toc29
TIME (2ms/div)
SPK+ -SPK-
(1V/div)
SDA
(2V/div)
ADC OUTPUT
(500mV/div)
SDA
(2V/div)
SOFT-START ADC
MAX9860 toc30
TIME (4ms/div)
-80
-60
-70
-40
-50
-30
-20
0
-10
10
-100 -80-90 -60-70 -40-50 -20-30 0-10
AUTOMATIC GAIN CONTROL THRESHOLDS
MAX9860 toc31
INPUT AMPLITUDE (dBV)
OUTPUT AMPLITUDE (dBFS)
-90
-70
-80
-50
-60
-40
-30
-10
-20
0
-100 -80 -60 -40 -20
NOISE GATE THRESHOLDS
MAX9860 toc32
INPUT AMPLITUDE (dBV)
OUTPUT AMPLITUDE (dBFS)
TOTAL HARMONIC DISTORTION + NOISE
vs. MCLK FREQUENCY, 0dBFS (DAC to HP)
MAX9860 toc33
MCLK FREQUENCY (MHz)
THD+N (%)
50403020
0.01
0.1
1
0.001
10 60
f
LRCLK
= 8kHz
DYNAMIC RANGE
vs. MCLK FREQUENCY, -60dBFS (DAC to HP)
MAX9860 toc34
MCLK FREQUENCY (MHz)
DYNAMIC RANGE (dB)
50403020
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-120
10 60
f
LRCLK
= 8kHz
MAX9860
16-Bit Mono Audio Voice Codec
12
Maxim Integrated