DS1870E-010+T&R

DS1870E-010+T&R Features

♦ Two-Channel Solution for Programmable RF BiasControl♦ The Potentiometer’s Position is AutomaticallyUpdated to Compensate for the AmbientTemperature and the Drain Voltage or Current♦ A Five-Channel, 13-Bit ADC ContinuouslyMonitors the Ambient Temperature, VCC, VD, ID1,and ID2♦ Hi/Lo Alarms for Each ADC Channel can Trigger aFault Output♦ Nonvolatile Memory for the Device Settings,Lookup Tables, and 32-Bytes of User Memory♦ I2C-Compatible Serial Interface with Up to EightDevices on the Same Serial Bus♦ Single 5V Power Supply♦ Small 16-Pin TSSOP Package♦ -40°C to +95°C Operational Temperature Range

DS1870E-010+T&R General Description

The DS1870 is a dual-channel bias controller targetedtoward class AB LDMOS RF power-amplifier applica-tions. It uses lookup tables (LUTs) to control 256-posi-tion potentiometers based on the amplifier’stemperature and drain voltage or current (or otherexternal monitored signal). With its internal temperaturesensor and multichannel A/D converter (ADC), theDS1870 provides a cost-effective solution that improvesthe amplifier’s efficiency by using nonlinear compensa-tion schemes that are not possible with conventionalbiasing solutions.

DS1870E-010+T&R Applications

Cellular Base StationsMedical EquipmentIndustrial ControlsOptical Transceivers