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A8287 Datasheet LNB Supply and Control Voltage Regulator

Manufacturer: Allegro MicroSystems

Download the A8287 datasheet PDF. This datasheet also includes the A8285 variant, as both parts are published together in a single manufacturer document.

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Note: The manufacturer provides a single datasheet file (A8285-Allegro.pdf) that lists specifications for multiple related part numbers.

General Description

Intended for analog and digital satellite receivers, the LNB (low noise block) converter regulator is a monolithic linear and switching voltage regulator, specifically designed to provide power and interface signals to an LNB downconverter, via coaxial cable.

The device uses a 2-wire bidirectional serial interface, compatible with the I2C (Inter-C bus) standard, that operates up to 400 kHz.

The A8285 is supplied in a 16-lead plastic power SOIC with internally fused leads for thermal dissipation.

Overview

A8285 and A8287 LNB Supply and Control Voltage Regulator.

Key Features

  • LNB selection and standby function.
  • Provides up to 500 mA load current.
  • Two-wire serial I2C interface.
  • Built-in tone oscillator, factory-trimmed to 22 kHz; facilitates DiSEqC™ 2.0 encoding.
  • Auxiliary modulation input.
  • 22 kHz tone detector facilitates DiSEqC™ decoding (A8287 only).
  • Tracking switch-mode power converter for lowest dissipation.
  • LNB overcurrent protection and diagnostics.
  • Internal overtemperature protec.

More Datasheets from Allegro MicroSystems

Part Number Description
A8283 LNB SUPPLY AND CONTROL-VOLTAGE REGULATOR
A8284 TWO-OUTPUT LNB SUPPLY AND CONTROL-VOLTAGE REGULATOR
A8285 LNB Supply and Control Voltage Regulator
A8296 Single LNB Supply and Control Voltage Regulator
A8297 Dual LNB Supply and Control Voltage Regulator
A8299 Dual LNB Supply and Control Voltage Regulator