General Description
The LM1871 is a complete six-channel digital proportional encoder and RF transmitter intended for use as a low-power, non-voice, unlicensed communication device at carrier frequencies of 27 MHz or 49 MHz with a field strength of 10,000 V/meter at 3 meters. In addition to radio-controlled hobby, toy, and industrial applications, the encoder section can provide a serial input of six words for hard-wired, infrared, or fiber optic communication links. Channel add logic is. provided to control the number of encoded channels from three to six, allowing increased design flexibility. When used with the LM1872 RC receiver/decoder, a low-cost RF-linked encoder and decoder system provides two analog and two. ON/OFF decoded channels.
Features
- Low-current 8V battery operation
- On-chip RF oscillator/transmitter
- One timing capacitor for six proportional channels
- Programmable number of channels.
- Regulated RF output power
- External modulator bandwidth control
- On-chip 4.6V regulator
- Up to 80 MHz carrier frequency operation
