MAX881R
MAX881R
PRODUCTIONLow-Noise Bias Supply in µMAX with Power OK for GaAsFET PA
1mVP-P Output Voltage Ripple
- Part Models
- 2
- 1ku List Price
- Starting From $3.33
Viewing:
Overview
- Small µMAX Package
- 1mVP-P Output Voltage Ripple and Noise
- Power-OK Signal to Control GaAsFET Drain Switch
- 0.05µA Logic-Controlled Shutdown
- 1ms Guaranteed Startup
- 2.5V to 5.5V Input
- -0.5V to (-VIN + 0.6V) Output at up to 4mA
- Operates with One 4.7µF and Three 0.22µF Capacitors (no inductors needed)
The MAX881R low-noise, inverting power supply is designed for biasing GaAsFET power amplifiers in portable wireless applications. This device is a chargepump inverter followed by a negative linear regulator. The input voltage range is 2.5V to 5.5V. The output is preset at -2.0V or can be set, using two resistors, to any voltage from -0.5V to (-VIN + 0.6V). It can deliver up to 4mA. The internal linear regulator also filters the output to 1mVP-P ripple and noise.
Other features include a power-OK (active-low POK) output that signals when the negative voltage is within 7.5% of its set point. It protects the GaAsFET by not allowing power to be applied to the GaAsFET's drain until it is properly biased. The signal can be routed either to a microcontroller or directly to a switch at the GaAsFET drain. The MAX881R is available in a 10-pin µMAX® package.
Applications
- Cell Phones Wireless Modems
- PCS Phones Two-Way Pagers
- PHS Phones Mobile Radios
- Wireless Handsets Wireless Computers
Documentation
Data Sheet 1
Evaluation Design File 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX881REUB+ | MINI_SO | ||
| MAX881REUB+T | MINI_SO |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 20, 2026 - 2571B PIN/ERRATA |
||
| MAX881REUB+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Charge Pumps 1 | ||
| MAX852 | Obsolete | Low-Noise, Regulated, Negative Charge Pump Power Supplies for GaAsFET Bias |
Evaluation Kits
Evaluation Kit for the MAX881R
Resources
Latest Discussions
No discussions on MAX881R yet. Have something to say?
Start a Discussion on EngineerZone®