AFE20408
Eight-channel power-amplifier monitor and controller with output switches and current sensors
AFE20408
- Eight analog outputs
- Eight monotonic DACs: 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
- Output on and off control switches
- Fast switching time
- Low resistance
- 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 sequence control for start-up and shutdown events
- Internal 2.5V reference
- SPI and I2C interface: 1.65V to 3.6V operation
- SPI: 4-wire interface
- I2C: 16 target addresses
- Specified temperature range: –40°C to +125°C
- Operating temperature range –55°C to +150°C
The AFE20408 is a highly integrated power-amplifier (PA) monitor and control device capable of temperature, current, and voltage supervision.
The AFE20408 bias controller is based around 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 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.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | AFE20408 8-Channel Power-Amplifier Monitor and Controller datasheet | PDF | HTML | 05 Apr 2024 |
Application note | Biasing GaN and LDMOS RF Power Amplifiers in Aerospace and Defense | PDF | HTML | 08 Mar 2024 | |
EVM User's guide | AFE20408 Evaluation Module User's Guide (Rev. B) | PDF | HTML | 01 Feb 2024 | |
Certificate | AFE20408EVM EU Declaration of Conformity (DoC) | 14 Nov 2023 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
AFE20408EVM — AFE20408 evaluation module
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
VQFN (RHB) | 32 | Ultra Librarian |
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