X9470 Overview
The Intersil X9470 RF PA Bias Controller contains all of the necessary analog ponents to sense the PA drain current through an external sense resistor and automatically control the gate bias voltage of an LDMOS PA. The external sense resistor voltage is amplified by an instrumentation amplifier and the output of the amplifier along with an external reference voltage is fed to the inputs of a parator. The parator...
X9470 Key Features
- Programmable Bias Controller IC for Class A and AB LDMOS Power Amplifiers
- Adaptive System on Chip Solution
- Bias Current Calibration to better than ±4%
- Automatic Bias Point Tracking and Calibration
- 28V Maximum VDD
- 2 Wire Interface for Programming Bias Setting and Optimizing IDQ Set Point
- Bias Level parator
- Shutdown Control pin for PA Signal
- Slave address to allow for multiple devices
- 24-pin TSSOP Package