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ADCDYNAMICPERFORMANCE
ADCCHANNELCHARACTERISTICS
DACPATHFILTER
tlv320aic20,tlv320aic21
tlv320aic24,tlv320aic25
tlv320aic20k,tlv320aic24k
SLAS363D–MARCH2002–REVISEDAPRIL2005
withiirfilter,fs=8khz
测试
PARAMETERMINTYPMAXMINTYPMAXUNIT
情况
aic20/21/24/25aic20k/24k
V
I
=-3db8282
snrsignal-至-noiseratio
V
I
=-9db7676
V
I
=-3db8383
THDTotalharmonicdistortiondB
V
I
=-9db7777
V
I
=-3db7878
信号-至-调和的
THD+N
distortion+noise
V
I
=-9db7070
aic20/21/24/25/20k/24k
PARAMETERTESTCONDITIONS
MINTYPMAXUNIT
V
i(pp)
差别的-endedinputlevelpgagain=0db4v
V
IO
Inputoffsetvoltage±5mV
I
B
Inputbiascurrent125µA
commonmodevoltage1.35v
DynamicrangeV
I
=-3db87db
ZeroDigital
MuteattenuationPGA=MUTEdB
代号
Intrachannelisolation87dB
E
G
GainerrorV
I
=-3dbat1020hz-0.45db
E
o(模数转换器)
ADCconverteroffseterror±15mV
一般-moderejectionratioatinmxand
CMRRV
I
=-100mvat1020hz50db
INPx
IdlechannelnoiseV
(inp,inm,micin)
=0V70µVrms
R
i
InputresistanceT
一个
=25°C10k
Ω
C
i
InputcapacitanceT
一个
=25°C2pF
iir5/f
s
S
Channeldelay
fir17/f
s
S
FS=8KHz
(1)(2)
FIRFILTERIIRFILTER
PARAMETERTESTCONDITIONS
MINTYPMAXMINTYPMAXUNIT
pathfilter,fs=8khz
0hzto200hz0.10.05
200hzto300hz-0.050.05
300hzto2.4khz-0.250.15-0.10.1
2.4khzto3khz-0.30.1-0.20.1
Filtergainrelativetogain
dB
at1020Hz
3khzto3.4khz-0.550.05-0.250.05
3.4khzto3.6khz-300
4khz-28-34
4.5khzto72khz-70-70
(1)thefiltergainoutsideofthepassbandismeasuredwithrespecttothegainat1020hz.theinputsignalisthedigitalequivalentofa
sinewave(digitalfullscale=0db).thenominaldifferentialdacchanneloutputwiththisinputconditionis4v
i(pp)
.thepassbandis
0to3600hzforan8-khzsamplerate.thispassbandscaleslinearlywiththeconversionrate.
(2)thefiltercharacteristicsarespecifiedbydesignandarenottestedinproduction.
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