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MAX680CSA

MAX680CSA Description

The MAX680CSA from Analog Devices Inc./Maxim Integrated is a dual-rail charge pump voltage converter designed to generate positive and negative fixed outputs from a single input voltage. This obsolete but historically significant IC operates within a 2V to 6V input range, delivering ±2Vin as outputs with a ratiometric function, ensuring proportional output tracking with input variations. Its 8kHz switching frequency and 10mA output current capability make it suitable for low-power applications. The device employs a charge pump topology without synchronous rectification, simplifying design while maintaining efficiency. Packaged in an 8-pin SOIC tube, it is surface-mount compatible and rated for 0°C to 70°C operation, with MSL 1 (unlimited) moisture sensitivity.

MAX680CSA Features

• Dual-Rail Output: Generates ±2Vin simultaneously, eliminating the need for multiple converters.
• Ratiometric Operation: Outputs scale linearly with input, ideal for precision applications.
• Wide Input Range (2V–6V): Supports diverse power sources, including batteries and low-voltage rails.
• Compact & Simple Design: Charge pump topology requires minimal external components, reducing board space.
• Low Noise: 8kHz switching frequency minimizes EMI, suitable for noise-sensitive circuits.
• Robust Packaging: 8-pin SOIC ensures reliable surface-mount integration in harsh environments.

MAX680CSA Applications

• Battery-Powered Systems: Efficiently generates dual rails for portable devices like data loggers or sensors.
• Op-Amp Biasing: Provides symmetrical ±V supplies for analog signal conditioning circuits.
• Industrial Controls: Used in low-power instrumentation requiring ratiometric voltage tracking.
• Legacy Electronics Maintenance: Ideal for repairing or replicating older designs due to its obsolete status.
• Test & Measurement: Simplifies power supply design in benchtop equipment with dual-rail needs.

Conclusion of MAX680CSA

The MAX680CSA stands out for its simplicity, dual-rail output, and ratiometric performance, making it a versatile choice for low-power, space-constrained designs. While obsolete, its efficiency and minimal external component count remain advantageous for niche applications. Engineers valuing reliability and straightforward integration in legacy or precision systems will find this IC particularly useful, despite newer alternatives being available. Its 8kHz operation and wide input range ensure compatibility with diverse power scenarios, solidifying its role in historical and specialized electronic designs.