Datasheet

PCM2903C
SBFS038 –JUNE 2012 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
All specifications at T
A
= +25°C, V
CCC
= V
CCP1
= V
CCP2
= V
CCX
= V
DD
= 3.3 V, f
S
= 44.1 kHz, f
IN
= 1 kHz, 16-bit data, unless
otherwise noted.
PCM2903C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ADC CHARACTERISTICS
Resolution 8, 16 Bits
Audio data channel 1, 2 Channel
ADC Clock Frequency
f
S
Sampling frequencies 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz
ADC DC Accuracy
% of
Gain mismatch, channel-to-channel ±1 ±5
FSR
% of
Gain error ±2 ±10
FSR
% of
Bipolar zero error ±0
FSR
ADC Dynamic Performance
(1)
V
IN
= –1 dB 0.01 0.02 %
THD+N Total harmonic distortion plus noise
V
IN
= –60 dB 5 %
Dynamic range A-weighted 81 89 dB
SNR Signal-to-noise ratio A-weighted 81 89 dB
Channel separation 80 85 dB
Analog Input
Input voltage 0.6 V
CCC
V
PP
Center voltage 0.5 V
CCC
V
Input impedance 30 kΩ
–3 dB 150 kHz
Antialising filter frequency response
f
IN
= 20 kHz –0.08 dB
ADC Digital Filter Performance
Passband 0.454 f
S
Hz
Stop band 0.583 f
S
Hz
Passband ripple ±0.05 dB
Stop-band attenuation –65 dB
t
d
Delay time 17.4/f
S
s
HPF frequency response –3 dB 0.078 f
S
/1000 Hz
(1) f
IN
= 1 kHz, using a System Two™ audio measurement system by Audio Precision™ in RMS mode with a 20-kHz LPF and 400-Hz HPF
in the calculation.
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