Product Description

2 - 2

TDA 5101A

Preliminary

Semiconductor Group

Confidential

Specification, May 1999

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

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Keyless entry systems

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Remote control systems

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Alarm systems

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Communication systems

2.3 Features

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fully integrated frequency synthesizer

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VCO without external components

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high efficiency power amplifier

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frequency range 315 MHz

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ASK modulation

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low supply current (typically < 7mA)

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voltage supply range 2.1 - 4 V

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power down mode

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low voltage sensor

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low external component count