A8290 Overview
Intended for analog and digital satellite receivers, this single low noise block converter regulator (LNBR) is a monolithic linear and switching voltage regulator, specifically designed to provide the power and the interface signals to an LNB down converter via coaxial cable. The A8290 requires few external ponents, with the boost switch and pensation circuitry integrated inside of the device. A high switching...
A8290 Key Features
- 2-wire serial I2C™ -patible interface: control (write) and status (read)
- LNB voltages (16 programmable levels) patible with all mon standards
- Tracking switch-mode power converter for lowest dissipation
- Integrated converter switches and current sensing
- Output current limit of 900 mA typical, with 48 ms timer
- Static current limit circuit allows full current at startup and
- Push-pull output stage minimizes 13→18 V and 18→13 V
- Adjustable rise/fall time via external timing capacitor
- Built-in tone oscillator, factory-trimmed to 22 kHz
- Four methods of 22 kHz tone generation, via I2C™ data
