BC352239A Datasheet, PDF (93/116 Pages) List of Unclassifed Manufacturers – BlueCore 3-Multimedia External

Device Terminal Descriptions
SPDIF_OUT
+5V
4.7Ω
100nF
8.2KΩ
4
3
TOTX173
2
1
Figure 8.27: Example Circuit for SPDIF Interface with Optical Output
Level Translator
1
3
2
TORX173 ₄
5
6
100nF
SPDIF_IN
+5V
47 µH
Figure 8.28: Example Circuit for SPDIF Interface with Optical Input
8.8.23 Audio Input Stage
The input stage of BlueCore3-Multimedia External consists of a low noise input amplifier, which receives its
analogue input signal from pins AUDIO_IN_P_LEFT and AUDIO_IN_N_LEFT to a second-order Σ-∆ ADC that
outputs a 4MBit/sec single-bit stream into the digital circuitry. The input can be configured to be either single
ended or fully differential. It can be programmed for either microphone or line input and has a 3-bit digital gain
setting of the input-amplifier in 3dB steps to optimize it for the use of different microphones.
BC352239A-ds-001Pc
© Cambridge Silicon Radio Limited 2004
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