Overview

The TDK 5111 F is a single chip ASK/FSK transmitter for operation in the frequency band 311 ... 317 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 life. Additional features are a power down mode and a divided clock output.

Features

• fully integrated frequency synthesizer

• VCO without external components

• ASK and FSK modulation

• frequency range 311 ... 317 MHz

• high efficiency power amplifier (typically 10 dBm)

• low supply current

• voltage supply range 2.1 ... 4 V

• temperature range −40 ... +125°C

• power down mode

• crystal oscillator 9.84 MHz

• FSK-switch

• divided clock output for µC

• low external component count

Application

• Tire pressure monitoring systems

• Keyless entry systems

• Remote control systems

• Alarm systems

• Communication systems