Datasheet

$%
SBAS291C − AUGUST 2003 − REVISED DECEMBER 2004
www.ti.com
4
ELECTRICAL CHARACTERISTICS (continued)
All parameters are specified at T
A
= +25°C with V
CC
= +5V, V
DD
= +3.3V, and a measurement bandwidth from 10Hz to 20kHz, unless otherwise
noted. System clock frequency is equal to 256f
S
for Single and Dual Rate sampling modes, and 128f
S
for Quad Rate sampling mode.
PCM4104
PARAMETER UNITSMAXTYPMINCONDITIONS
DYNAMIC PERFORMANCE WITH 24-BIT DATA
(1)
f
S
= 48kHz
Total harmonic distortion + noise
THD+N
f = 1kHz at 0dBFS −100 −94 dB
Total harmonic distortion + noise THD+N
f = 1kHz at −60dBFS
−56 dB
Dynamic range, A-weighted f = 1kHz at −60dBFS 112 118 dB
Idle channel SNR, A-weighted All zero input data 119 dB
Idle channel SNR, unweighted All zero input data 116 dB
Channel separation f = 1kHz at 0dBFS for active channel 100 110 dB
f
S
= 96kHz
Total harmonic distortion + noise
THD+N
f = 1kHz at 0dBFS, BW = 10Hz to 40kHz −100 dB
Total harmonic distortion + noise THD+N
f = 1kHz at −60dBFS, BW = 10Hz to 40kHz
−53 dB
Dynamic range, A-weighted f = 1kHz at −60dBFS 118 dB
Idle channel SNR, A-weighted All zero input data 119 dB
Idle channel SNR, unweighted All zero input data, BW = 10Hz to 40kHz 113 dB
Channel separation f = 1kHz at 0dBFS for active channel 110 dB
fs = 192kHz
Total harmonic distortion + noise
THD+N
f = 1kHz at 0dBFS, BW = 10Hz to 40kHz −97 dB
Total harmonic distortion + noise THD+N
f = 1kHz at −60dBFS, BW = 10Hz to 40kHz
−53 dB
Dynamic range, A-weighted f = 1kHz at −60dBFS 118 dB
Idle channel SNR, A-weighted All zero input data 118 dB
Idle channel SNR, unweighted All zero input data, BW = 10Hz to 40kHz 113 dB
Channel separation f = 1kHz at 0dBFS for active channel 110 dB
DYNAMIC PERFORMANCE WITH 16-BIT DATA
fs = 44.1kHz
Total harmonic distortion + noise
THD+N
f = 1kHz at 0dBFS −92 dB
Total harmonic distortion + noise THD+N
f = 1kHz at −60dBFS
−33 dB
Dynamic Range, A-weighted f = 1kHz at −60dBFS 96 dB
Idle channel SNR, A-weighted
(2)
All zero input data 118 dB
Idle channel SNR, unweighted
(2)
All zero input data 115 dB
(1)
Dynamic performance parameters are measured using an Audio Precision System Two Cascade or Cascade Plus test system. Input data word
length is 24 bits with triangular PDF dither added for dynamic range and THD+N tests. Idle channel SNR is measured with both the soft and
zero data mute functions disabled and 0% full-scale input data with no dither applied. The measurement bandwidth is limited by using the Audio
Precision 10Hz high-pass filter in combination with either the AES17 20kHz low-pass filter or AES17 40kHz low-pass filter. All A-weighted
measurements are performed using the Audio Precision A-weighting filter in combination with either the 22kHz or 80kHz low-pass filter.
Measurement mode is set to RMS for all parameters. The AVERAGE measurement mode will yield better typical performance numbers.
(2)
Idle Channel SNR is not limited by word length.