PCM3793A
PCM3794A
www.ti.com
SLAS529A–JANUARY 2007–REVISED FEBRUARY 2007
ELECTRICAL CHARACTERISTICS (continued)
All specifications at TA = 25°C, VDD = VIO = VCC = VPA = 3.3 V, fS = 48 kHz, system clock = 256 fS, and 16-bit data (unless
otherwise noted).
PCM3793ARHB, PCM3794ARHB
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
MAX
Line Input to Digital Output Through ADC (AIN1L/R, AIN2L/R, AIN3L, and AIN3L/R)
ALC = OFF, microphone boost = 0 dB, PGA = 0 dB, speaker and headphone = powered down, analog mixing = disabled
DYNAMIC PERFORMANCE
2.828
Vp-p
Vrms
dB
Full-scale input voltage
0 dB
1
90
Dynamic range
EIAJ, A-weighted
EIAJ, A-weighted
SNR
Signal-to-noise ratio
Channel separation
83
10
90
dB
87
dB
THD+N Total harmonic distortion + noise –1 dB
ANALOG INPUT
0.009%
Center voltage
0.5 VCC
20
V
Input impedance
kΩ
Microphone Bias
ALC = OFF, microphone boost = 0 dB, PGA = 0 dB, speaker and headphone = powered down, analog mixing = disabled
Bias voltage
0.75 VCC
V
Bias source current
Output noise
2
mA
µV
6.5
Filter Characteristics
INTERPOLATION FILTER FOR DAC
Pass band
0.454 fS
Stop band
0.546 fS
–50
Pass-band ripple
±0.04
dB
dB
s
Stop-band attenuation
Group delay
19/fs
De-emphasis error
ANALOG FILTER FOR DAC
Frequency response
DECIMATION FILTER FOR ADC
Pass band
±0.1
dB
f = 20 kHz
±0.2
dB
0.408 fS
Stop band
0.591 fS
–60
Pass-band ripple
±0.02
dB
dB
s
Stop-band attenuation
Group delay
f < 3.268 fS
17/fS
HIGH-PASS FILTER FOR ADC
–3 dB, fc = 4 Hz
3.74
10.66
–0.5 dB, fc = 4 Hz
–0.1 dB, fc = 4 Hz
–3 dB, fc = 240 Hz
–0.5 dB, fc = 240 Hz
–0.1 dB, fc = 240 Hz
24.2
Frequency response
Hz
235.68
609.95
2601.2
5
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