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XR-2120 Datasheet PSK Modem Filter

Manufacturer: Exar (now MaxLinear)

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General Description

FUNCTIONAL BLOCK DIAGRAM The X R-2120 is a self-contained bandpass fi Iter set designed for realization of Bell 212A compatible 1200 bits/sec PSK modems.

The XR-2120 utilizes CMOS technology and switched capacitor circuit techniques to minimize external components to a single crystal or frequency source.

Contained in the device are two complete bandpass filters centered around the Bell standard 1200 Hz and 2400 Hz send and receive frequencies.

Overview

XR-2120 PSK Modem Filter GENERAL.

Key Features

  • included are digitally programmable transmit and receive gains as well as input anti-aliasing and complete output smoothing filters. Separate VSS pins for transmit, receive, and digital sections are provided to minimize crosstalk. The XR-2120 features guaranteed filter group delay specifications, within ±1001lS of nominal. The XR-2120C is a relaxed version of the X R-2120 with group delay specified within ±15QIlS. The de.

More Datasheets from Exar (now MaxLinear)

Part Number Description
XR-2120A 212A/V.22 Modem Filter
XR-2121 Bell 212A Type Modulator
XR-2122 Bell 212A Type Demodulator
XR-2123 PSK Modulator / Demodulator
XR-2123A PSK Modulator / Demodulator
XR-2125 Data Buffer
XR-2126 Bell 212A / CCITT V.22 Modem Filters
XR-2127 Bell 212A / CCITT V.22 Modem Filters
XR-2128 Bell 212A / CCITT V.22 Modem Filters
XR-2129 Bell 212A / CCITT V.22 Modem Filters