MAX881 Series

Low-Noise Bias Supply in µMAX with Power OK for GaAsFET PA

Manufacturer: Analog Devices Inc./Maxim Integrated

Catalog

Low-Noise Bias Supply in µMAX with Power OK for GaAsFET PA

Part	Voltage - Input [Max]	Voltage - Input [Min]	Voltage - Output [Min]	Voltage - Output [Max]	Voltage - Output	Supplier Device Package	Applications	Number of Outputs	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Package / Case	Outputs and Type	Outputs and Type	Board Type	Supplied Contents	Main Purpose	Utilized IC / Part	Regulator Topology	Current - Output	Contents
Analog Devices Inc./Maxim Integrated MAX881REUB+	5.5 V	2.5 V	-2.5 V	6.1 V	-2 V	10-uMAX/uSOP	Charge Pump Wireless Devices	1	85 °C	-40 C	Surface Mount	10-TFSOP 10-MSOP (0.118" 3.00mm Width)
Analog Devices Inc./Maxim Integrated MAX881REUB+T	5.5 V	2.5 V	-2.5 V	6.1 V	-2 V	10-uMAX/uSOP	Charge Pump Wireless Devices	1	85 °C	-40 C	Surface Mount	10-TFSOP 10-MSOP (0.118" 3.00mm Width)
Analog Devices Inc./Maxim Integrated MAX881REVKIT#	5.5 V	2.5 V			-2 V								1	1 Non-Isolated Output Non-Isolated	Fully Populated	Board(s)	DC/DC Negative Inverter	MAX881R	Inverting	4 mA	Board(s)
Analog Devices Inc./Maxim Integrated MAX881REUB-T	5.5 V	2.5 V			-2 V	10-uMAX	Charge Pump Wireless Devices	1	85 C	-40 ¯C	Surface Mount	10-TFSOP 10-MSOP (0.118" 3.00mm Width)
Analog Devices Inc./Maxim Integrated MAX881REVKIT	5.5 V	2.5 V			-2 V								1	1 Non-Isolated Output Non-Isolated	Fully Populated	Board(s)	DC/DC Negative Inverter	MAX881R	Inverting	4 mA	Board(s)
Analog Devices Inc./Maxim Integrated MAX881REUB	5.5 V	2.5 V	-2.5 V	6.1 V	-2 V	10-uMAX/uSOP	Charge Pump Wireless Devices	1	85 °C	-40 C	Surface Mount	10-TFSOP 10-MSOP (0.118" 3.00mm Width)

Catalog

Low-Noise Bias Supply in µMAX with Power OK for GaAsFET PA

Description

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-Pripple 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.ApplicationsCell Phones Wireless ModemsPCS Phones Two-Way PagersPHS Phones Mobile RadiosWireless Handsets Wireless Computers