PSB 2134 H V2.2 Infineon Technologies, PSB 2134 H V2.2 Datasheet - Page 15

• Manufacturer Part Number: PSB 2134 H V2.2
• Description: IC CODEC FILTER 4CHAN MQFP-64
• Manufacturer: Infineon Technologies
• Series: SICOFI®r

Specifications of PSB 2134 H V2.2

• Function: CODEC Filter
• Interface: IOM-2 PCM, SPI
• Number Of Circuits: 4
• Voltage - Supply: 5V
• Current - Supply: 26mA
• Power (watts): 130mW
• Mounting Type: Surface Mount
• Package / Case: 64-QFP
• Includes: Level Metering Function, Tone Generation
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Other names: PSB2134HV2.2X; SP000007389; SP000007390

Transmit Path
The analog input signal has to be DC-free connected by an external capacitor because
there is an internal virtual reference ground potential. After passing a simple antialiasing
prefilter (PREFI) the voice signal is converted to a 1-bit digital data stream in the
Sigma-Delta-converter. The first downsampling steps are done in fast running digital
hardware filters. The following steps are implemented in the micro-code which has to be
executed by the central Digital Signal Processor. This DSP-machine is able to handle
the workload for all four channels. At the end the fully processed signal (flexibly
programmed in many parameters) is transferred to the PCM- interface in a
PCM-compressed signal representation.
Receive Path
The
PCM-Law-pass-filtering, gain correction and frequency response correction are the next
steps which are done by the DSP-machine. The upsampling interpolation steps are
again processed by fast hardware structures to reduce the DSP-workload. The
Figure 3
SICOFI
Semiconductor Group
digital
®
2/4-TE Signal Flow Graph (for any channel)
input
signal
is
received
15
via
the
PCM
Functional Description
interface.
PSB 2132
PSB 2134
Expansion,
09.97