ELECTRICAL CHARACTERISTICS
TLV320AIC34
SLAS538A – OCTOBER 2007 – REVISED NOVEMBER 2007
At 25 ° C, AVDD_DAC, DRVDD, IOVDD = 3.3 V, DVDD = 1.8 V, f
S
= 48-kHz, 16-bit audio data (unless otherwise noted)
TEST CONDITIONS MIN TYP MAX UNIT
AUDIO ADC,
Codec Block A, B
Input signal level (0-dB) Single-ended input 0.707 V
RMS
f
S
= 48 ksps, 0-dB PGA gain, LINE1LP_x and LINE1LM_x
SNR Signal-to-noise ratio
(1) (2)
80 92 dB
inputs ac-shorted to ground, A-weighted
f
S
= 48 ksps, 0-dB PGA gain, – 60-dB full-scale input signal
Dynamic range
(2)
93 dB
applied at LINE1LP_x and LINE1LM_x inputs, A-weighted
f
S
= 48 ksps, 0-dB PGA gain, – 2-dB full-scale 1-kHz input
THD Total harmonic distortion – 87 – 70 dB
signal applied at LINE1LP_x and LINE1LM_x inputs
217-Hz signal applied to DRVDD 49
PSRR Power supply rejection ratio dB
1-kHz signal applied to DRVDD 46
f
S
= 48 ksps, 0-dB PGA gain, – 2-dB full-scale 1-kHz input
Gain error 0.55 dB
signal applied on LINE1LP_x and LINE1LM_x inputs
1-kHz, – 2-dB full-scale signal, MIC3L_x to MIC3R_x – 86
1-kHz, – 2-dB full-scale signal, MIC2LP_x and MIC2LM_x to
– 98
Input channel separation MIC2RP_x and MIC2RM_x dB
1-kHz, – 2-dB full-scale signal, MIC1LP_x and MIC1LM_x to
– 80
MIC1RP_x and MIC1RM_x
ADC programmable-gain
1-kHz input frequency, R
SOURCE
< 50 Ω 59.5 dB
amplifier maximum gain
ADC programmable-gain
1-kHz input frequency, R
SOURCE
< 50 Ω 0.5 dB
amplifier step size
LINE1LP_x, LINE1LM_x, or LINE1RP_x, LINE1RM_x inputs
routed to single ADC; 20
input mix attenuation = 0 dB
LINE1LP_x, LINE1LM_x, or LINE1RP_x, LINE1RM_x inputs
80
routed to single ADC; input mix attenuation = 12 dB
LINE2LP_x, LINE2LM_x, or LINE2RP_x, LINE2RM_x inputs
routed to single ADC; 20
Input resistance k Ω
input mix attenuation = 0 dB
LINE2LP_x, LINE2LM_x, or LINE2RP_x, LINE2RM_x inputs
80
routed to single ADC; input mix attenuation = 12 dB
MIC3L_x or MIC3R_x inputs routed to single ADC,
20
input mix attenuation = 0 dB
MIC3L_x or MIC3R_x inputs routed to single ADC, input mix
80
attenuation = 12 dB
Input level control minimum
0 dB
attenuation setting
Input level control maximum
12 dB
attenuation setting
Input signal level Differential input 1.414 V
RMS
f
S
= 48 ksps, 0-dB PGA gain, inputs ac-shorted to ground,
SNR Signal-to-noise ratio
(1) (2)
92 dB
differential mode, A-weighted
f
S
= 48 ksps, 0-dB PGA gain, – 2-dB full-scale 1-kHz input
THD Total harmonic distortion – 89 dB
signal, differential mode, A-weighted
ANALOG PASS-THROUGH MODE,
Codec Block A, B
MIC1/LINE1 to LINE_OUT 330
r
ds(on)
Input-to-output switch resistance Ω
MIC2/LINE2 to LINE_OUT 330
(1) Ratio of output level with 1-kHz full-scale sine-wave input, to the output level with the inputs short-circuited, measured A-weighted over a
20-Hz to 20-kHz bandwidth using an audio analyzer.
(2) All performance measurements done with 20-kHz 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.
Copyright © 2007, Texas Instruments Incorporated Submit Documentation Feedback 9
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