Datasheet

PCM2906C
SBFS037 –NOVEMBER 2011 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
All specifications at T
A
= +25°C, V
BUS
, = 5 V, f
S
= 44.1 kHz, f
IN
= 1 kHz, and 16-bit data (unless otherwise noted).
PCM2906C
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 frequency 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz
ADC DC Accuracy
Gain mismatch,
±1 ±5 % of FSR
channel-to-channel
Gain error ±2 ±10 % of FSR
Bipolar zero error ±0 % of FSR
ADC Dynamic Performance
(8)
V
IN
= –1 dB
(9)
, V
CCCI
= 3.67 V 0.01 0.02 %
Total harmonic distortion
THD+N V
IN
= –1 dB
(10)
0.1 %
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
CCCI
V
PP
Center voltage 0.5 V
CCCI
V
Input impedance 30 kΩ
–3 dB 150 kHz
Antialiasing 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 0.078f
s
/1000 Hz
(8) f
IN
= 1 kHz, using the System Two™ audio measurement system by Audio Precision™ in RMS mode with 20-kHz LPF, 400-Hz HPF in
calculation.
(9) Using external voltage regulator for V
CCCI
(see Figure 36).
(10) Using internal voltage regulator for V
CCCI
(see Figure 37).
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