Electrical characteristics (continued) – Rainbow Electronics MAX98088 User Manual
Page 9
Stereo Audio Codec
with FLEXSOUND Technology
MAX98088
9
ELECTRICAL 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 loads (R
LOAD
) connected from LOUTL and LOUTR to ground. R
LOAD
= 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)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LINE INPUT PREAMP
Full-Scale Input
V
IN
AV
PGAIN_
= 0dB
1
V
P-P
AV
PGAIN_
= -6dB
1.4
Level Adjust Gain
AV
PGAIN_
T
A
= +25NC
(Note 5)
PGAINA/PGAINB = 0x0
19
20
21
dB
PGAINA/PGAINB = 0x1
13
14
15
PGAINA/PGAINB = 0x2
2
3
4
PGAINA/PGAINB = 0x3
0
PGAINA/PGAINB = 0x4
-4
-3
-2
PGAINA/PGAINB = 0x5,
0x6, 0x7
-7
-6
-5
Input Resistance
R
IN
AV
PGAIN_
= +20dB
14.5
21
28
kI
AV
PGAIN_
= +14dB
20
AV
PGAIN_
= +3dB
20
AV
PGAIN_
= 0dB
7.5
10
14
AV
PGAIN_
= -3dB
20
AV
PGAIN_
= -6dB
20
Feedback Resistance
R
IN_FB
INAEXT/INBEXT = 1
T
A
= +25NC
18
20
22
kI
T
A
= T
MIN
to T
MAX
16
24
ADC LEVEL CONTROL
ADC Level Adjust Range
AV
ADCLVL
AVL/AVR = 0xF to 0x0 (Note 5)
-12
+3
dB
ADC Level Step Size
1
dB
ADC Gain Adjust Range
AV
ADCGAIN
AVLG/AVRG = 00 to 11 (Note 5)
0
18
dB
ADC Gain Adjust Step Size
6
dB
ADC DIGITAL FILTERS
VOICE MODE IIR LOWPASS FILTER (MODE1 = 0)
Passband Cutoff
f
PLP
Ripple limit cutoff
0.441 x fs
Hz
-3dB cutoff
0.449 x fs
Passband Ripple
f < f
PLP
-0.1
+0.1
dB
Stopband Cutoff
f
SLP
0.47 x f
S
Hz
Stopband Attenuation
(Note 6)
f > f
SLP
74
dB