AMC7908
8-channel, 100mA current-drive bipolar power-amplifier monitor and controller with output switches
AMC7908
- 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 accuracy
- 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: –40°C to +150°C
The AMC7908 is a highly integrated power-amplifier (PA) monitor and control device capable of temperature, current, and voltage supervision.
The AMC7908 bias controller is based around eight digital-to-analog converters (DAC) 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 AMC7908 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 AMC7908 an excellent choice as an all-in-one, bias control circuit for the power amplifiers found in RF communication systems. 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.
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Technical documentation
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | AMC7908 8-Channel Power-Amplifier Monitor and Controller datasheet | PDF | HTML | 09 Aug 2024 |
| Application note | Biasing LDMOS and GaN Power Amplifiers With the AMC7908 | PDF | HTML | 09 Oct 2024 | |
| EVM User's guide | AMC7908 Evaluation Module User's Guide (Rev. A) | PDF | HTML | 12 Jun 2024 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
AMC7908EVM — AMC7908 evaluation module
The AMC7908EVM is an easy-to-use platform to evaluate the functionality and performance of the AMC7908 device. The AMC7908EVM has optional circuits and jumpers to configure the device for different applications.
The AMC7908 is a highly integrated power-amplifier monitor and control device with (...)
ANALOG-ENGINEER-CALC — Analog engineer's calculator
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
TINA-TI — SPICE-based analog simulation program
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (RHB) | 32 | Ultra Librarian |
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