Datasheet

MAX9867
Ultra-Low Power Stereo Audio Codec
_______________________________________________________________________________________ 5
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DAC STEREO AUDIO MODE DIGITAL DC BLOCKING HIGHPASS FILTER
Passband Cutoff
(-3dB from Peak)
f
DHPPB
DVFLT = 0x1
0.000625
x f
S
Hz
DC Attenuation DC
ATTEN
DVFLT = 0x1 90 dB
ADC (Note 6)
f
S
= 8kHz, MODE = 0 (IIR voice) 75 84
Dynamic Range (Note 5) DR
f
S
= 8kHz to 48kHz, MODE = 1 (FIR audio) 85
dB
Full-Scale Input
Differential MIC input or stereo-line inputs,
AV
PRE
= 0dB, AV
PGAM
= 0dB
1V
P-P
Gain Error (Note 7)
DC accuracy, measured with respect to
80% of full-scale output
15%
f
S
= 8kHz 1.2
Voice Path Phase Delay P
DLY
f = 1kHz, 0dBFS, HP
filter disabled,
analog input to
digital output
f
S
= 16kHz 0.61
ms
Total Harmonic Distortion THD f = 1kHz, f
S
= 8kHz, T
A
= +25°C, 0dBFS -81 -70 dB
ADC Level Adjust Range AV
ADC
AVL/AVR = 0xF to 0x0 -12 +3 dB
V
AVDD
= 1.65V to 1.95V, input referred 60 85
f = 217Hz, V
RIPPLE
= 100mV, AV
ADC
= 0dB,
input referred
85
f = 1kHz, V
RIPPLE
= 100mV, AV
ADC
= 0dB,
input referred
80
Power-Supply Rejection Ratio PSRR
f = 10kHz, V
RIPPLE
= 100mV, AV
ADC
= 0dB,
input referred
80
dB
ADC VOICE MODE DIGITAL IIR LOWPASS FILTER
With respect to f
S
within ripple;
f
S
= 8kHz to 48kHz
0.445 x
f
S
Passband Cutoff f
PLP
-3dB cutoff
0.449 x
f
S
Hz
Passband Ripple f < f
PLP
±0.1 dB
Stopband Cutoff f
SLP
With respect to f
S
; f
S
= 8kHz to 48kHz
0.469 x
f
S
Hz
Stopband Attenuation f > f
SLP
, f = 20Hz to 20kHz 74 dB
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
PVDD
= V
DVDD
= V
DVDDIO
= +1.8V, R
L
= ∞, headphone load (R
L
) connected between _OUTP and _OUTN in differential
mode, C
REF
= 2.2µF, C
MICBIAS
= C
PREG
= C
REG
= 1µF, AV
PRE
= +20dB, AV
PGAM
= 0dB, AV
DAC
= 0dB, AV
LINE
= +20dB, AV
VOL
=
0dB, MCLK = 13MHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)