PCM4108

SBAS354 − JUNE 2005

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4

ELECTRICAL CHARACTERISTICS (continued)

All parameters are specified at TA = +25°C with VCC = +5V, VDD = +3.3V, and a measurement bandwidth from 10Hz to 20kHz, unless otherwise

noted. System clock frequency is equal to 256fS for Single and Dual Rate sampling modes, and 128fS for Quad Rate sampling mode.

PCM4108

PARAMETER

UNITS

MAX

TYP

MIN

CONDITIONS

DYNAMIC PERFORMANCE WITH 24-BIT DATA(1)

fS = 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

fS = 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.