A8287

· 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 protection
· LNB voltages (16 possible levels) compatible with all common standards

• 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 protection
• LNB voltages (16 possible levels) compatible with all common standards

Load Supply Voltage, V_IN............................................16 V
Output Current, I_OUT ............................Internally Limited*
Output Voltage
- LNB, BOOST ............................................0.3 V to 28 V
- TOUT...................................................... 0.3 V to 22 V
Logic Input
- EXTM.........................................................0.3 V to 5 V
- Other....................................................... 0.3 V to 7 V
Logic Output ............................................... 0.3 V to 7 V
Package Power Dissipation .....See power dis sipation
information in the Application Information section
Operating Temperature
- Ambient, T_A.........................................20°C to +85°C
- Junction, T_J........................................20°C to +150°C
- Storage,T_S .......................................55°C to +150°C

Intended for analog and digital satellite receivers, the LNB (low noise block) converter regulator A8287 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 A8287 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. The A8287 is supplied in a 24-lead plastic power SOIC with internally fused leads. Both devices are also available in lead (Pb) free versions, with 100% matte tine leadframe plating.