Datasheet

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TLV320AIC34
SLAS538A – OCTOBER 2007 – REVISED NOVEMBER 2007
ELECTRICAL CHARACTERISTICS (continued)
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
ADC DIGITAL DECIMATION FILTER, f
S
= 48 kHz,
Codec Block A, B
Filter gain from 0 to 0.39 f
S
± 0.1 dB
Filter gain at 0.4125 f
S
– 0.25 dB
Filter gain at 0.45 f
S
– 3 dB
Filter gain at 0.5 f
S
– 17.5 dB
Filter gain from 0.55 f
S
to 64 f
S
– 75 dB
Filter group delay 17/f
S
s
MICROPHONE BIAS,
Codec Block A, B
Programmable setting = 2 V, load current = 4 mA 2
Bias voltage Programmable setting = 2.5 V, load current = 4 mA 2.3 2.4 2.7 V
Programmable setting = DRVDD (3.3 V), load current = 4 mA 3
Current sourcing Programmable setting = 2.5 V 4 mA
AUDIO DAC – DIFFERENTIAL LINE OUTPUT, Load = 10 k Ω ,
Codec Block A, B
0-dB input full-scale signal, output volume control = 0 dB,
Full-scale output voltage 1.414 V
RMS
output common-mode setting = 1.35 V
No input signal, output volume control = 0 dB, output
SNR Signal-to-noise ratio
(3)
90 99 dB
common-mode setting = 1.35 V, f
S
= 48 kHz, A-weighted
– 60 dB, 1-kHz input full-scale signal, output volume control =
Dynamic range 0 dB, output common-mode setting = 1.35 V, f
S
= 48 kHz, 95 dB
A-weighted
0-dB, 1-kHz input full-scale signal, output volume control = 0
THD Total harmonic distortion – 88 – 75 dB
dB, output common-mode setting = 1.35 V, f
S
= 48 kHz
217-Hz signal applied to AVDD_DAC 77
PSRR Power-supply rejection ratio dB
1-kHz signal applied to AVDD_DAC 73
DAC channel separation 0-dB full-scale input signal between left and right lineout 123 dB
0-dB, 1-kHz input full-scale signal, output volume control =
DAC gain error – 0.49 dB
0 dB, output common-mode setting = 1.35 V, f
S
= 48 kHz
AUDIO DAC – SINGLE-ENDED LINE OUTPUT, Load = 10 k Ω ,
Codec Block A, B
0-dB input full-scale signal, output volume control = 0 dB,
Full-scale output voltage 0.707 Vrms
output common-mode setting = 1.35 V
No input signal, output volume control = 0 dB, output
SNR Signal-to-noise ratio 94 dB
common-mode setting = 1.35 V, f
S
= 48 kHz, A-weighted
0-dB, 1-kHz input full-scale signal, output volume control =
THD Total harmonic distortion 79 dB
0 dB, output common-mode setting = 1.35 V, f
S
= 48 kHz
0-dB, 1-kHz input full-scale signal, output volume control =
DAC gain error – 0.5 dB
0 dB, output common-mode setting = 1.35 V, f
S
= 48 kHz
(3) Unless otherwise noted, all measurements use output common-mode voltage setting of 1.35 V, 0-dB output level control gain, 16- Ω
single-ended load.
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