Datasheet

TLV320AIC3256
SLOS630B –DECEMBER 2010–REVISED JANUARY 2013 www.ti.com
Electrical Characteristics, ADC (continued)
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 (Gain = 40dB)
Input signal level (for 0dB output) Differential Input, CM = 0.9V, Channel Gain = 40dB 10 mV
RMS
1kHz sine wave input
Differential configuration
IN1L and IN1R routed to Right ADC
IN2L and IN2R routed to Left ADC
Device Setup
R
IN
= 10kΩ, f
S
= 48kHz, AOSR = 128
MCLK = 256 * f
S
PLL Disabled
AGC = OFF
Processing Block = PRB_R1,
Power Tune = PTM_R4
ICN Idle-Channel Noise, A- Inputs ac-shorted to ground, input referred noise 2.8 μV
RMS
weighted
(3) (4)
AUDIO ADC
1kHz sine wave input 0.1 dB
Single-ended configuration
R
IN
= 20kΩ, f
S
= 48kHz, AOSR = 128,
Gain Error MCLK = 256 * f
S
, PLL Disabled
AGC = OFF, Channel Gain = 0dB
Processing Block = PRB_R1,
Power Tune = PTM_R4, CM = 0.9V
1kHz sine wave input at -3dBFS 109 dB
Single-ended configuration
IN1L routed to Left ADC
Input Channel Separation
IN1R routed to Right ADC, R
IN
= 20kΩ
AGC = OFF, AOSR = 128,
Channel Gain = 0dB, CM = 0.9V
1kHz sine wave input at –3dBFS on IN2L, IN2L internally 108 dB
not routed.
Input Pin Crosstalk
IN1L routed to Left ADC
ac-coupled to ground
1kHz sine wave input at –3dBFS on IN2R,
IN2R internally not routed.
IN1R routed to Right ADC
ac-coupled to ground
Single-ended configuration R
IN
= 20kΩ,
AOSR = 128 Channel, Gain = 0dB, CM = 0.9V
217Hz, 100mVpp signal on AVdd, 55 dB
PSRR Single-ended configuration, R
IN
= 20kΩ,
Channel Gain = 0dB; CM = 0.9V
Single-Ended, R
IN
= 10kΩ, PGA gain set to 0dB 0 dB
Single-Ended, R
IN
= 10kΩ, PGA gain set to 47.5dB 47.5 dB
Single-Ended, R
IN
= 20kΩ, PGA gain set to 0dB –6 dB
ADC programmable gain
amplifier gain
Single-Ended, R
IN
= 20kΩ, PGA gain set to 47.5dB 41.5 dB
Single-Ended, R
IN
= 40kΩ, PGA gain set to 0dB –12 dB
Single-Ended, R
IN
= 40kΩ, PGA gain set to 47.5dB 35.5 dB
ADC programmable gain 1kHz tone 0.5 dB
amplifier step size
(3) 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.
(4) 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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