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10.2.2
Inputs
Analogue Inputs
Analogue-to-Digital Converter
Note that the same ADC model is used for all analogue inputs.
Model
Texas Instruments PCM4220
Sampling Rate
192 kHz (fixed)
Resolution
24 bits
Frequency Response
10 Hz – 80 kHz (+ 0 dB, -0.2 dB)
Frequency Range
<
2 Hz – 85 kHz (-3 dB)
Dynamic Range (Typical)
122 dB (A) (997 Hz, -60 dB FS)
Dynamic Range (Worst-case)
117 dB (A) (997 Hz, -60 dB FS)
THD+N
0.001% (997 Hz, -1 dB FS, 22 Hz – 20 kHz)
Channel Separation
100 dB (20 Hz to 20 kHz)
Passband Ripple
±
0.001 dB
Power Link
Connector
RJ45
Input Impedance
100 k
Ω
Audio Channels
2
Maximum Input Voltage
6.5 V RMS
Features
5 V control voltage for On/Standby
Power Link Data support
Sensitivity
125 mV RMS produces 88 dB SPL (1 m, on-axis, free-field)
XLR Line
Input Impedance (Single-ended)
50 k
Ω
(Fixed)
Input Impedance (Balanced)
100 k
Ω
(Fixed)
Maximum Input Voltage
2.0, 4.0, 6.5 V RMS (Selectable)
Features
Differential and impedance balanced
Pin configuration
Pin 1
Audio ground
Pin 2
Positive signal input (“hot”)
Pin 3
Negative signal input (“cold”)
Note that the XLR connector casing (or “shell”) is connected to the chassis ground of the BeoLab 90 for shielding.
RCA Line
Input Impedance
50
Ω
, 50 k
Ω
(Selectable)
Maximum Input Voltage
2.0, 4.0, 6.5 V RMS (Selectable)
Digital Inputs
Sampling Rate Converter
Note that the SRC is applied to all digital inputs.
Model
Texas Instruments SRC4392
Output sampling rate
192 kHz (fixed)
Output word length
24 bits
THD+N
0.000014% (f=997 Hz, 0 dBFS, 22 Hz – 40 kHz, unweighted)
Dynamic Range
138 dB (f=997 Hz, -60 dBFS, 22 Hz – 40 kHz, unweighted)
Passband Ripple
±
0.008 dB
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