pmb2920-s Infineon Technologies Corporation, pmb2920-s Datasheet
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pmb2920-s
Manufacturer Part Number
pmb2920-s
Description
Dect Analog Circuit
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PMB2920-S.pdf
(1 pages)
DECT Analog Circuit
General Description
The DECT-Analog Circuit is one of the devices of the
Siemens chip set for the digital cordless telephone specified
by the DECT standard.
The device designed for cordless handhelds and cordless
fixed stations is a highly integrated circuit and realizes the
analog front end functions needed in such systems. The
circuit contains an A/D- and a D/A converter and adjustable
gain stages. Connection of microphone and earpiece is
possible with a minimum of external components.
Furthermore the device generates the reference voltages for
the A/D converter the TXDA output voltage stabilization and
the LCD-display-driver modules integrated in the
DECT-Digital Circuit.
The reference voltages can be used together with external
components and the PMB 27201, 27202, 27221, 27251,
27252 and 2728 for volume control of the ringer.
The device is fabricated using Siemens advanced ACMOS
technology and will be available in a 24 pin package.
Siemens Aktiengesellschaft
Block Diagram
Microphone
Earpiece
RCTI
MICS
AGR
AMI
Generation
Ref. Volt.
AGX
(REF 1 ... 5)
1
Type
PMB 2920-S
Features
• High performance A/D- and D/A conversion
• Adjustable analog amplifiers
• Analog front end for direct connection of a handset mouth
• On-chip microphone supply generation
• Power savings power-down and MUTE functions
• Comparator for preprocessing of the demodulated receive
• Reference voltage generation for on-chip A/D- and
• Support of volume control of the tone ringer signal
and earpiece
signal
D/A converters and for the DECT-Digital Circuit
ADC
DAC
RXDI RXREF
Control
Block
I
Interface
2
Digital
Audio
C Bus
+
+
-
-
Package
P-SSOP-24-1 (Shrink, SMD)
RXDA
Data Out
3.4 MHz (Clock)
32 kHz (Frame)
Data In
Ringer Control
ITB08462
PMB 2920