pmb2920-s Infineon Technologies Corporation, pmb2920-s Datasheet

pmb2920-s

Manufacturer Part Number

pmb2920-s

Description

Dect Analog Circuit

Manufacturer

Infineon Technologies Corporation

Datasheet

1.PMB2920-S.pdf (1 pages)

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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)

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

Interface

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

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