AD7820LN

Overview

The AD7820LN is an 8-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It utilizes a half-flash architecture and features a single-ended input type with a parallel interface. The device operates on a single 5 V supply for both analog and digital domains, supporting a reference voltage of 4.75 V. It is housed in a 20-pin PDIP package designed for through-hole mounting. The component functions within a temperature range of -40 °C to +85 °C and dissipates approximately 40 mW of power.

Feature Summary

• Integrates a track-and-hold amplifier to support high-speed data conversion capabilities.
• Features a parallel output interface compatible with standard microprocessor buses.
• Designed for low power consumption suitable for battery-operated applications.

Applications

• Industrial process control systems requiring precise signal monitoring.
• Data acquisition modules for automated testing equipment.
• Medical instrumentation devices needing reliable analog-to-digital conversion.

Procurement Notes

Verify the specific suffix 'LN' against official Analog Devices documentation to confirm pinout compatibility and thermal specifications. Ensure that the required operating temperature range aligns with the industrial grade (-40 °C to +85 °C) defined for this variant. Cross-reference the datasheet for any updates regarding lead-free compliance or RoHS status before finalizing procurement plans.

Selection Notes

Select the AD7820LN when an 8-bit resolution and parallel interface are required for cost-effective data acquisition. Consider the through-hole PDIP packaging if PCB layout constraints favor manual assembly or prototyping over surface-mount technology. Evaluate the 5 V single-supply requirement against available system power rails to ensure direct compatibility without additional level shifting.

Part Context

The AD7820 belongs to the broader AD7820 family of high-speed ADCs from Analog Devices. This series typically includes variants with different packaging options such as PLCC or SOIC, catering to various manufacturing needs. The LN designation specifically identifies the through-hole PDIP version, distinguishing it from surface-mount counterparts within the same functional family.

Replacement Considerations

Direct replacements may include other 8-bit parallel ADCs from Analog Devices or competitors like Texas Instruments. Verify pin compatibility and logic levels when substituting. Check for updated versions within the AD7820 family that might offer improved performance or availability while maintaining the same footprint.