TLV320AIC26_07 Datasheet, PDF (4/74 Pages) Texas Instruments – LOW POWER STEREO AUDIO CODEC WITH HEADPHONE/SPEAKER AMPLIFIER AND 12-BIT BATTERY / TEMPERATURE / AUXILIARY ADC

TLV320AIC26
SLAS412− DECEMBER 2003
ELECTRICAL CHARACTERISTICS
At +25°C, AVDD,DRVDD,IOVDD = 3.3 V, DVDD = 1.8 V, Int. Vref = 2.5 V, Fs (Audio) = 48 kHz, unless otherwise noted
PARAMETER
TEST CONDITIONS
MIN
TYP
BATTERY MONITOR INPUTS
Input voltage range
0.5
Input leakage current
Battery conversion not selected
±1
AUXILIARY A/D CONVERTER
Resolution
Programmable: 8-, 10-,12-bits
No missing codes
12-bit resolution
11
Integral nonlinearity
−5
Offset error
−6
Gain error
Calculated with effect of internal reference
variation removed.
−6
Noise
53
AUDIO CODEC
ADC DECIMATION FILTER
Sample rate of 48 ksps
Filter gain from 0 to 0.39Fs
±0.1
Filter gain at 0.4125Fs
−0.25
Filter gain at 0.45Fs
−3
Filter gain at 0.5Fs
−17.5
Filter gain from 0.55Fs to 64Fs
−75
Filter group delay
17/Fs
MICROPHONE INPUT TO ADC
1 kHz sine wave input, Fs = 48 ksps
Full scale input voltage (0 dB)
By design, not tested in production
0.707
Input common mode
By design, not tested in production
1.35
SNR
Measured as idle channel noise, 0-dB gain,
A-weighted
80
92
THD
PSRR
0.63-Vrms input, 0-dB gain
−89
1 kHz, 100 mVpp on AVDD.(1)
57
Mute attenuation
Output code with 0.63-Vrms sine wave input at
1 kHz
0000H
Input resistance
20
Input capacitance
10
MICROPHONE BIAS
Voltage
D4 = 0 control register 05H/Page2
2.5
D4 = 1 control register 05H/Page2
2.0
Sourcing current
4.7
(1) _{ADC PSRR measurement is calculated as:}
ǒ Ǔ PSRR + 20 log10
VSIGsup
VADCOUT
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MAX UNITS
6.0 V
µA
12 Bits
Bits
5 LSB
6 LSB
6 LSB
µVrms
dB
dB
dB
dB
dB
sec
Vrms
V
dBA
−72 dB
dB
kΩ
pF
V
V
mA
4