TLV320AIC3256 Datasheet, PDF (11/43 Pages) Texas Instruments – Ultra Low Power Stereo Audio Codec With Embedded miniDSP

TLV320AIC3256
www.ti.com
SLOS630A – DECEMBER 2010 – REVISED DECEMBER 2010
Electrical Characteristics, Microphone Interface
At 25°C, AVdd, DVdd, IOVdd,DVdd_CP, DRVdd_HP = 1.8V, fs (Audio) = 48kHz, Cref = 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
DRVdd_HP
1.5
V
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
DRVdd_HP
1.23
V
Micbias Mode 1, Connect to AVdd or
DRVdd_HP
1.43
V
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, 20Hz
to 20kHz bandwidth,
Current load = 0mA.
9.5
mV_RMS
Current Sourcing
Micbias Mode 2, Connect to DRVdd_HP
3
mA
Inline Resistance
Micbias Mode 3, Connect to AVdd
Micbias Mode 3, Connect to DRVdd_HP
131
Ω
89
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Product Folder Link(s): TLV320AIC3256
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