PSB21383HV13XP Infineon Technologies, PSB21383HV13XP Datasheet - Page 128

• Manufacturer Part Number: PSB21383HV13XP
• Manufacturer: Infineon Technologies

Specifications of PSB21383HV13XP

• Number Of Line Interfaces: 1
• Control Interface: HDLC
• Lead Free Status / Rohs Status: Compliant

Data Sheet
Two differential inputs (MIP1/MIN1 and MIP2/MIN2) and one single-ended input (AXI)
can be connected to the amplifier AMI via an analog input multiplexer (ATCR.AIMX). The
programmable amplifier AMI (ATCR.MIC) provides a coarse gain adjustment range from
0...42dB in 6dB steps. The maximum value of the programmable gain adjustment of the
microphone amplifier with specified transmission characteristics is 36dB for the
differential input. The maximum gain value with specified transmission characteristics of
the single ended input AXI is 24dB. Fine gain adjustment is performed in the digital
domain via the programmable gain adjustment stage GX (see signal processor section).
This allows a perfect level adaptation to various types of microphone transducers without
loss in the signal to noise performance.
The fully differential output HOP/HON connects the amplifier AHO to a handset earpiece.
Differential output LSP/LSN is provided for use with a 50
(3.3V supply voltage) respectively loudspeaker. The programmable amplifiers AHO and
ALS (ARCR.HOC, ARCR.LSC) provide a coarse gain adjustment range from 11.5dB...-
21.5dB (ALS) or 2.5dB...-21.5dB (AHO) respectively. The step size is for both amplifiers
3dB. Fine gain adjustment is performed in the digital domain via the programmable
adjustment stage GR.
Each output of the differential amplifiers AHO and ALS can be powered down separately
(ACR.DHOP, DHON, DLSP, DLSN). By setting ACR.SEM, a powered down
loudspeaker output can be grounded internally for a single ended operation.
The bandgap reference voltage is low-pass filtered via a capacity connected to pin
BGREF. The internal and external reference voltages are derived from this filtered
bandgap reference voltage providing a good noise performance.
A square wave signal from the tone generator can be output directly to the loudspeaker
amplifier (TGSR.TRL) via a level shifter.
Note: The single-ended input (AXI) is internally connected to VREF. To avoid an
4.1.1
Figure 72 shows the attenuation plan of the AFE for the transmit and receive direction.
The levels are given for the digital reference level (0dBm0) and the max. PCM level in
A-law coding (3.14dBm0) at the two supply voltages 3.3V and 5V.
The stated microphone amplifier gain is the maximum gain for guaranteed transmission
characteristics.
In the receive path the stated loudspeaker or handset output amplification is the
maximum selectable gain at the maximum digital PCM level (3.14dBm0) for guaranteed
transmission characteristics.
unsymmetric input signal to the internal amplifer module, external resitors must
not be connected between AXI and GND or AXI and VREF.
AFE Attenuation Plan
118
(5V supply voltage) or 25
PSB 21381/2
PSB 21383/4
2001-03-12
Codec