Datasheet

TLV320AIC3256
www.ti.com SLOS630B –DECEMBER 2010–REVISED JANUARY 2013
Electrical Characteristics, ADC
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
AUDIO ADC
(1) (2)
(CM = 0.9V)
Input signal level (for 0dB output) Single-ended, CM = 0.9V 0.5 V
RMS
1kHz sine wave input
Single-ended Configuration
IN1R to Right ADC and IN1L to Left ADC,
R
IN
= 20kΩ, f
S
= 48kHz,
Device Setup AOSR = 128, MCLK = 256 * f
S
,
PLL Disabled; AGC = OFF,
Channel Gain = 0dB,
Processing Block = PRB_R1,
Power Tune = PTM_R4
Inputs ac-shorted to ground 80 93
Signal-to-noise ratio, A-
SNR dB
IN2R, IN3R routed to Right ADC and ac-shorted to ground 93
weighted
(1) (2)
IN2L, IN3L routed to Left ADC and ac-shorted to ground
DR Dynamic range A-weighted
(1) (2)
–60dB full-scale, 1kHz input signal 93 dB
–3dB full-scale, 1kHz input signal –84 –70 dB
Total Harmonic Distortion plus
IN2R,IN3R routed to Right ADC –84
THD+N
Noise
IN2L, IN3L routed to Left ADC
–3dB full-scale, 1kHz input signal
AUDIO ADC (CM = 0.75V)
Input signal level (for 0dB output) Single-ended, CM = 0.75V, AVdd = 1.5V 0.375 V
RMS
1kHz sine wave input
Single-ended Configuration
INR, IN2R, IN3R routed to Right ADC
INL, IN2L, IN3L routed to Left ADC
R
IN
= 20kΩ, f
S
= 48kHz,
Device Setup
AOSR = 128, MCLK = 256 * f
S
,
PLL Disabled, AGC = OFF,
Channel Gain = 0dB,
Processing Block = PRB_R1
Power Tune = PTM_R4
SNR Signal-to-noise ratio, A-weighted Inputs ac-shorted to ground 90 dB
(1) (2)
DR Dynamic range A-weighted
(1) (2)
–60dB full-scale, 1kHz input signal 90 dB
THD+N Total Harmonic Distortion plus –3dB full-scale, 1kHz input signal –81 dB
Noise
(1) Ratio of output level with 1kHz full-scale sine wave input, to the output level with the inputs short circuited, measured A-weighted over a
20Hz to 20kHz bandwidth using an audio analyzer.
(2) All performance measurements done with 20kHz low-pass filter and, where noted, A-weighted filter. Failure to use such a filter may
result in higher THD+N and lower SNR and dynamic range readings than shown in the Electrical Characteristics. The low-pass filter
removes out-of-band noise, which, although not audible, may affect dynamic specification values
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