AD775JN

Overview

The AD775JN is a CMOS, low-power, 8-bit, 20 MSPS sampling analog-to-digital converter (ADC) manufactured by Analog Devices. It utilizes a pipelined/ping pong two-step flash architecture to achieve high sampling rates up to 35 MHz while maintaining a power dissipation of 60 mW under +5 V single-supply operation. The device integrates a built-in sampling function and on-chip reference bias resistors, providing a complete ADC solution without external components for these functions. Key electrical specifications include a differential nonlinearity of 0.3 LSB, differential gain error of 1%, and differential phase error of 0.5 degrees. It features three-state outputs and is housed in a 24-pin 400 mil Plastic DIP package.

Feature Summary

• CMOS 8-bit resolution with 20 MSPS sampling rate and 35 MHz maximum input frequency
• Low power consumption of 60 mW at +5 V single supply
• Integrated on-chip reference bias resistors and sampling function
• Three-state digital outputs for direct interface compatibility

Applications

• Video signal processing systems
• Portable instrumentation requiring high-speed data acquisition
• Medical ultrasound equipment front-ends
• Software-defined radio architectures

Part Context

The AD775 belongs to the AD775 family of high-speed sampling ADCs from Analog Devices. The 'JN' suffix denotes the industrial temperature range (-40°C to +85°C) and the 24-pin Plastic DIP package format. This component is part of Analog Devices' portfolio designed to address system size and cost constraints in high-speed data conversion applications.

Replacement Considerations

Direct pin-compatible replacements within the same package and specification envelope are not explicitly listed in public documentation. Designers should evaluate newer generations of Analog Devices high-speed ADCs or other vendors offering 8-bit, 20+ MSPS converters in 24-pin DIP packages, ensuring voltage levels and output drive capabilities match the original design requirements.