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MAX843ESA
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Product Detailed Parameters
- Description：MAX843 -2V GAASFET BIAS
- Series：-
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Bulk
- Applications：Charge Pump, Cellular Telephone Transmitter
- Voltage - Input：2.5V ~ 10V
- Number of Outputs：1
- Voltage - Output：-2V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The MAX843ESA is a specialized integrated circuit designed as a regulated charge pump for generating a -2V output, primarily intended for GaAsFET bias applications in cellular telephone transmitters. It operates from an input voltage range of 2.5V to 10V and is housed in an 8-SOIC package with a width of 3.90mm.
Feature Summary
- Provides a stable -2V regulated output specifically optimized for GaAsFET biasing requirements
- Utilizes charge pump architecture to generate negative voltage from positive supply inputs
- Designed for low-noise performance suitable for sensitive RF transmitter circuits
Applications
- Cellular telephone transmitter biasing
- GaAsFET gate bias generation
- RF front-end module power management
Procurement Notes
Verify the specific suffix (e.g., ESA vs. ISA) against the official datasheet to ensure correct temperature rating and package variant. Confirm that the -2V output specification aligns with the target GaAsFET requirements. Check current availability status as this component may be subject to limited supply or end-of-life conditions depending on the manufacturer's production schedule.
Selection Notes
Select this component when a dedicated, low-noise -2V bias source is required for GaAsFETs in cellular transmitters. Ensure the system input voltage falls within the 2.5V to 10V range. Consider thermal performance and PCB layout constraints associated with SOIC-8 packages for high-frequency noise suppression.
Part Context
This device belongs to the Maxim Integrated line of specialized regulators, now part of Analog Devices Inc. It addresses the specific need for clean, regulated negative voltages in RF power amplifiers where standard linear regulators may introduce excessive noise or require complex external components.
Replacement Considerations
Consult the official datasheet for direct pin-compatible alternatives or updated series replacements. Verify electrical compatibility, particularly the -2V output stability and input voltage range, before substituting.
