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DS1870 LDMOS RF Power-Amplifier Bias Controller

Industry's First Integrated LDMOS Power-Amplifier Controller Monitor

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Status

Active: In Production.

Description

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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, V_CC, V_D, I_D1, and I_D2
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

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