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Description

FULL DATA SHEET (PDF, 380kB) Download   E-Mail The DS1870 is a dual-channel bias controller targeted toward class AB LDMOS RF power-amplifier applications. It uses lookup tables (LUTs) to control 256-position potentiometers based on the amplifier's temperature and drain voltage or current (or other external monitored signal). With its internal temperature sensor and multichannel A/D converter (ADC), the DS1870 provides a cost-effective solution that improves the amplifier's efficiency by using nonlinear compensation schemes that are not possible with conventional biasing solutions.

Key Features		Applications/Uses
Two-Channel Solution for Programmable RF Bias Control The Potentiometer's Position is Automatically Updated to Compensate for the Ambient Temperature and the Drain Voltage or Current A Five-Channel, 13-Bit ADC Continuously Monitors the Ambient Temperature, VCC, VD, ID1, and ID2 Hi/Lo Alarms for Each ADC Channel can Trigger a Fault Output Nonvolatile Memory for the Device Settings, Lookup Tables, and 32-Bytes of User Memory I²C-Compatible Serial Interface with Up to Eight Devices on the Same Serial Bus Single 5V Power Supply Small 16-Pin TSSOP Package -40°C to +95°C Operational Temperature Range		Cellular Base Stations Industrial Controls Medical Equipment Optical Transceivers

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