BSP3505D Datasheet, PDF (4/40 Pages) Micronas – Baseband Sound Processor

BSP 3505D
PRELIMINARY DATA SHEET
Baseband Sound Processor
Release Notes: The hardware description in this
document is valid for the BSP 3505D version A2.
1. Introduction
The BSP 3505D is designed as a single-chip Baseband
Sound Processor for applications in analog and digital
TV sets, video recorders, and satellite receivers.
The IC is produced in submicron CMOS technology, and
is fully pin and software compatible to the MSP 34xx
family. The BSP 3505D is available in a PLCC68,
PSDIP64, PSDIP52, PQFP80, and in a PQFP44 pack-
age.
Note: The BSP 3505D version has reduced control reg-
isters and less functional pins. The remaining registers
are software compatible to the MSP 34xxD. The pinning
is compatible to the MSP 34xxD.
1.1. BSP 3505D Integrated Functions
– Stereo baseband input via integrated A/D converters
– Two stereo D/A converters
– AVC: Automatic Volume Correction
– Bass, treble, volume, loudness processing
– Full SCART in/out matrix without restrictions
– spatial effect (pseudostereo / basewidth enlargement)
– Digital control output pins D_CTR_OUT0/1
– Reduction of necessary controlling
– Less external components
1.2. Features of the DSP-Section
– flexible selection of audio sources to be processed
– digital baseband processing: volume, bass, treble,
loudness, and spatial effects
– simple controlling of volume, bass, treble, loudness,
and spatial effects
1.3. Features of the Analog Section
– two selectable analog stereo audio baseband inputs
(= two SCART inputs)
input level: ≤2 V RMS,
input impedance: ≥25 kΩ
– one selectable analog mono input:
input level: ≤2 V RMS,
input impedance: ≥15 kΩ
– stereo high-quality A/D converter, S/N-Ratio: ≥85 dB
– 20 Hz to 20 kHz bandwidth for SCART-to-SCART-
copy facilities
– loudspeaker: stereo four-fold oversampled D/A-con-
verter
output level per channel: max. 1.4 VRMS
output resistance: max. 5 kΩ
S/N-ratio: ≥85 dB at maximum volume
max. noise voltage in mute mode: ≤10 µV
(BW: 20 Hz ...16 kHz)
– stereo four-fold oversampled D/A converter supplying
a stereo SCART-output
output level per channel: max. 2 V RMS,
output resistance: max. 0.5 kΩ,
S/N-Ratio: ≥85 dB (20 Hz...16 kHz)
MONO IN
SCART1 IN ²
SCART2 IN ²
2 I²C
BSP 3505D
2 Loudspeaker
OUT
2 SCART
OUT
Fig. 1–2: Main I/O Signals BSP 3505D
Tuner
SIF
FM/AM Mono
VIF
SCART
Inputs
2
SCART1
2
SCART2
Fig. 1–1: Typical BSP 3505D application
4
BSP 3505D
Loudspeaker
2
SCART1
SCART
Output
Micronas