Datasheet

TLV320AIC3256
SLOS630B –DECEMBER 2010–REVISED JANUARY 2013 www.ti.com
Electrical Characteristics, Microphone Interface
At 25°C, Vsys, AVdd, DVdd, IOVdd, DVdd_CP, DRVdd_HP = 1.8V, f
S
(Audio) = 48kHz, C
REF
= 1µF on REF PIN, PLL and
Charge pump disabled unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
MICROPHONE BIAS
Bias voltage Bias voltage CM = 0.9V, DRVdd_HP = 1.8V
Micbias Mode 0, Connect to AVdd or 1.5 V
DRVdd_HP
Micbias Mode 3, Connect to AVdd AVdd V
Micbias Mode 3, Connect to DRVdd_HP DRVdd_HP V
CM = 0.75V, DRVdd_HP = 1.8V
Micbias Mode 0, Connect to AVdd or 1.23 V
DRVdd_HP
Micbias Mode 1, Connect to AVdd or 1.43 V
DRVdd_HP
Micbias Mode 3, Connect to AVdd AVdd V
Micbias Mode 3, Connect to DRVdd_HP DRVdd_HP V
MICROPHONE BIAS
Bias voltage Bias voltage CM = 0.9V, DRVdd_HP = 3.3V
Micbias Mode 0, Connect to DRVdd_HP 1.5 V
Micbias Mode 1, Connect to DRVdd_HP 1.7 V
Micbias Mode 2, Connect to DRVdd_HP 2.5 V
Micbias Mode 3, Connect to DRVdd_HP DRVdd_HP V
CM = 0.75V, DRVdd_HP = 3.3V
Micbias Mode 0, Connect to DRVdd_HP 1.23 V
Micbias Mode 1, Connect to DRVdd_HP 1.43 V
Micbias Mode 2, Connect to DRVdd_HP 2.1 V
Micbias Mode 3, Connect to DRVdd_HP DRVdd_HP V
Output Noise CM = 0.9V, Micbias Mode 2, A-weighted, 9.5
20Hz to 20kHz bandwidth,
μV
RMS
Current load = 0mA.
Current Sourcing Micbias Mode 2, Connect to DRVdd_HP 3 mA
Micbias Mode 3, Connect to AVdd 131
Inline Resistance Ω
Micbias Mode 3, Connect to DRVdd_HP 89
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