NE529

NE529 High-Speed Analog Voltage Comparator

Overview

The NE529 is a high-performance analog voltage comparator that combines state-of-the-art Schottky diode technology with conventional linear processes. This innovative integration enables the simultaneous fabrication of high-speed TTL gates with precision linear amplifiers. The device is designed for applications requiring fast response times and precision voltage comparison, making it ideal for digital interfaces, analog-to-digital conversion, and memory sensing systems.

The NE529 features complementary output gates and offers compatibility with both TTL and ECL logic levels, providing flexibility in system design. Its wide common-mode and differential voltage ranges make it suitable for diverse applications in both industrial and consumer electronics.

Key Features

• Ultra-fast 10ns propagation delay for high-speed applications
• Complementary output gates for flexible system integration
• Dual compatibility with both TTL and ECL logic levels
• Wide common-mode voltage range for versatile operation
• Wide differential input voltage range (±5V)
• High typical voltage gain of 5000 for precise comparisons
• Strobe inputs for output control and synchronization
• Available in both 14-pin DIP and SOIC packages

Applications

• Analog-to-Digital Conversion: High-speed comparator for flash ADCs
• Logic Level Conversion: ECL-to-TTL and TTL-to-ECL interfaces
• Memory Systems: Sense amplifiers for fast memory access
• Optoelectronics: Optical data coupling and reception
• Instrumentation: Precision measurement systems
• Industrial Control: Fast response control systems
• Communications: Signal detection and processing

Electrical Characteristics

Absolute Maximum Ratings

• Positive Supply Voltage (V1+): +15V
• Negative Supply Voltage (V1-): -15V
• Gate Supply Voltage (V2+): +7V
• Output Voltage: +7V
• Differential Input Voltage: ±5V
• Input Common Mode Voltage: ±6V
• Power Dissipation (N package @ 25°C): 1420mW

Recommended Operating Conditions

• Operating Temperature Range: 0°C to +70°C
• Supply Voltage Range: ±5V to ±15V
• Gate Supply Voltage: +4.5V to +5.5V

Package Information

Pin Configuration (14-pin DIP/SOIC)

• Pin 1: V1+ (Positive supply)
• Pin 2: NC (No connection)
• Pin 3: INPUT A (Non-inverting input)
• Pin 4: INPUT B (Inverting input)
• Pin 5: NC (No connection)
• Pin 6: V1- (Negative supply)
• Pin 7: NC (No connection)
• Pin 8: V2+ (Gate supply)
• Pin 9: STROBE A
• Pin 10: OUTPUT A
• Pin 11: NC (No connection)
• Pin 12: GND
• Pin 13: OUTPUT B
• Pin 14: STROBE B

Available Packages

• NE529N: 14-pin Plastic Dual In-Line Package (DIP), 0 to +70°C
• NE529D: 14-pin Small Outline (SO) Package, 0 to +70°C

Functional Description

The NE529 integrates a precision differential input stage with high-speed output drivers. The input stage provides high gain and wide common-mode range, while the output stage delivers TTL/ECL compatible signals with fast transition times. The strobe inputs allow for output enable/disable functionality, providing additional control for system synchronization.

The internal architecture features a carefully balanced design with Schottky-clamped transistors for high-speed operation while maintaining linear precision. The complementary outputs (OUTPUT A and OUTPUT B) provide both normal and inverted comparison results, reducing the need for additional inversion stages in system designs.

Performance Characteristics

• Propagation Delay: 10ns typical
• Rise/Fall Time: 3ns typical
• Input Bias Current: 10μA maximum
• Input Offset Voltage: 5mV maximum
• Power Supply Rejection Ratio: 80dB typical

Design Considerations

When implementing the NE529 in circuit designs, consider the following:

• Use proper bypass capacitors (0.1μF ceramic) near supply pins
• Maintain clean power supplies with good regulation
• Keep input traces short to minimize parasitic capacitance
• For high-frequency applications, use proper PCB layout techniques
• The strobe inputs should be properly terminated when not in use
• Consider thermal management for high-speed continuous operation

Ordering Information

Conclusion

The NE529 represents a significant advancement in comparator technology, combining the speed of Schottky diode fabrication with the precision of linear amplifier design. Its versatile features, including dual logic compatibility and complementary outputs, make it an excellent choice for demanding high-speed comparison applications across various industries. The device's robust electrical characteristics and flexible package options ensure reliable performance in both prototype and production environments.