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MAXIM INTEGRATED / ANALOG DEVICES MAX881REUB Low-Noise Bias Supply
The MAX881REUB+ is a low-noise bias supply with integrated power-OK functionality, designed for GaAsFET power amplifiers in a 10-pin µMAX package. It features an inverting charge pump inverter followed by a negative linear regulator, operating within a voltage range of 2.5V to 5.5V. The output voltage is preset at -2V but can be configured to any voltage from -0.5V up to just below the input voltage by adjusting two resistors. It can supply up to 4mA of current. The internal regulator ensures output ripple and noise are kept to 1mVp-p. The MAX881REUB+ includes an active-low power-OK (POK) signal that indicates when the negative voltage is within 7.5% of its set point, preventing power application to the GaAsFET drain until properly biased. The device can route this signal to a microcontroller or directly to a switch controlling the GaAsFET drain. Additional features include a 100kHz oscillator frequency, operation across -40°C to 85°C, minimal startup and ripple noise (1ms startup time, 1mVp-p), and requires only a few capacitors (one 4.7µF and three 0.22µF), with no inductors needed. It maintains output load regulation of 2mV/mA at input voltages ≥ 2.7V, with outputs capable of sourcing 0 to 4mA. Suitable applications include power management for portable devices and consumer electronics.
MAXIM INTEGRATED / ANALOG DEVICES MAX881REUB Low-Noise Bias Supply Specifications:
- Input voltage range: 2.5V to 5.5V
- Output voltage: preset at -2V or adjustable from -0.5V to (-VIN + 0.6V)
- Maximum output current: 4mA
- Ripple and noise at output: 1mVp-p
- Power-OK (POK) active-low signal, indicates when voltage is within 7.5% of set point
- Startup time: 1ms
- Oscillator frequency: 100kHz
- Operating temperature range: -40°C to 85°C
- Capacitors: one 4.7µF and three 0.22µF, no inductors needed
- Package: 10-pin µMAX
- Linear regulator reduces ripple and noise, improves AC rejection
- Power dissipation: 8.2mW at TA=25°C
- Storage temperature: -65°C to 165°C
- Lead temperature (soldering, 10s): +300°C
Buy the Maxim MAX881REUB – Reliable Bias Supply for Industrial Applications
Purchase the Maxim MAX881REUB bias supply online today and ensure optimal biasing for GaAsFET power amplifiers. Compact and efficient, it provides a regulated negative voltage with low ripple, high stability, and integrated power-OK signaling. Designed for portable wireless devices, the device features adjustable output voltage, minimal startup time, and requires only a few capacitors, with no inductors. Its small 10-pin µMAX package allows easy integration into your system for enhanced performance, dependability, and simplified power management. Ideal for consumer electronics and industrial RF applications.
Get Maxim MAX881REUB today—built for low-noise biasing and reliable power management in portable wireless and RF systems.
Frequently Asked Questions
Where can I buy MAXIM INTEGRATED / ANALOG DEVICES MAX881REUB?
You can click on the BUY or RFQ button to purchase MAX881REUB from an authorized MAXIM INTEGRATED / ANALOG DEVICES distributor.
How do I troubleshoot issues or seek technical support for part MAX881REUB?
You can download the MAX881REUB datasheet or visit the MAXIM INTEGRATED / ANALOG DEVICES website for support.
Who is the manufacturer of MAX881REUB?
MAXIM INTEGRATED / ANALOG DEVICES