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Texas Instruments AFE20408 Power-Amplifier Monitor & Controller

Texas Instruments AFE20408 Power-Amplifier Monitor and Controller is a highly integrated power-amplifier (PA) monitor and control device capable of temperature, current, and voltage supervision. The AFE20408 bias controller is based on eight digital-to-analog converters (DACs) with programmable output ranges. The eight gate bias outputs are switched on and off through dedicated control pins. The gate bias switches are designed for fast response and enable correct power sequencing and protection of depletion-mode transistors, such as GaAs and GaN.

The Texas Instruments AFE20408 supervisor is based around an accurate multichannel analog-to-digital converter (ADC). The device integrates two high-voltage inputs, two high-side current-sense amplifiers and an accurate on-chip temperature sensor. The function integration and wide operating temperature range make the AFE20408 an excellent choice as an all-in-one, bias control circuit for power amplifiers. The flexible DAC output ranges and built-in sequencing features let the device be used as a biasing controller for a large variety of transistor technologies, such as LDMOS, GaAs, and GaN.

Features

  • Eight analog outputs
    • Eight monotonic DACs with 1.22mV resolution
    • Automatically configured output ranges
      • Positive output voltage: 0V to 10V
      • Negative output voltage: –10V to 0V
    • High current drive capability
    • High capacitive load tolerance
  • Multichannel ADC monitor
    • Two high-voltage external inputs: 0V to 85V
    • Two high-side current-sense amplifiers: up to 85V common mode range
    • Local temperature sensor: ±2.5°C error
  • Output on and off control switches
    • Fast switching time
    • Low resistance
  • Output sequence control for start-up and shutdown events
  • Internal 2.5V reference
  • SPI and I2C interface with 1.65V to 3.6V operation
    • SPI: 4-wire interface
    • I2C: 16 target addresses
  • -40°C to +125°C specified temperature range
  • -55°C to +150°C operating temperature range

Applications

  • Radar
  • Electronic warfare
  • Software-defined radio
  • Seeker front end

Simplified Schematic

Schematic - Texas Instruments AFE20408 Power-Amplifier Monitor & Controller

Related Development Tool

Texas Instruments AFE20408EVM Evaluation Module

Provides an easy-to-use platform for the AFE20408 power-amplifier monitor & control device.

Learn Moreabout Texas Instruments AFE20408EVM Evaluation Module View Productsrelated to Texas Instruments AFE20408EVM Evaluation Module
Published: 2024-06-05 | Updated: 2024-06-13