DS1870
Description
Features
- Two-Channel Solution for Programmable RF Bias Control
- The Potentiometer’s Position is Automatically Updated to pensate 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™-patible 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
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...
