TDA5101A Datasheet, PDF (7/21 Pages) Infineon Technologies AG – ASK Transmitter 315 MHz

Confidential
TDA 5101A
Preliminary
Product Description
2.1 Overview
The TDA5101A is a single chip ASK transmitter for the frequency band
315 MHz. The IC offers a high level of integration and needs only a few external
components. The device contains a fully integrated PLL synthesizer and a high
efficiency power amplifier to drive a loop antenna. A special circuit design and
an unique power amplifier design are used to save current consumption and
therefore to save battery live. Additionally features like a power down mode, a
low power detect and a divided clock output are implemented.
2.2 Applications
s Keyless entry systems
s Remote control systems
s Alarm systems
s Communication systems
2.3 Features
s fully integrated frequency synthesizer
s VCO without external components
s high efficiency power amplifier
s frequency range 315 MHz
s ASK modulation
s low supply current (typically < 7mA)
s voltage supply range 2.1 - 4 V
s power down mode
s low voltage sensor
s low external component count
Semiconductor Group
2-2
Specification, May 1999