AD7581LN

ADCs/DACs - Special Purpose Overview

The AD7581LN is an 8-bit, 8-channel Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc. It utilizes a Successive Approximation Register (SAR) architecture and features a CMOS microprocessor-compatible interface. The device operates on a single +5V power supply with a maximum sampling rate of 1.5 kS/s. It accepts single-ended analog inputs within a range of -17 V to +17 V. Key performance metrics include a maximum linear error of 0.731%, a differential nonlinearity (DNL) of +/- 0.875 LSB, and an integral nonlinearity (INL) of +/- 0.75 LSB. The component is housed in a 28-pin Plastic Dual In-Line Package (PDIP-28) and supports an industrial operating temperature range from 0°C to +70°C.

ADCs/DACs - Special Purpose Feature Summary

• 8-Bit Resolution with 8 Single-Ended Input Channels
• CMOS uP-Compatible Parallel Interface
• Wide Analog Input Voltage Range (-17 V to +17 V)
• Low Power Consumption (8 mW typical)

ADCs/DACs - Special Purpose Applications

• Data acquisition systems requiring multi-channel input
• Industrial process control instrumentation
• Portable battery-powered test equipment

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'LN' against the official Analog Devices datasheet to confirm the exact temperature grade and package variant. Ensure compatibility with existing PCB footprints for the 28-pin PDIP package. Check current availability status as older ADC models may have limited production runs or obsolescence notices.

ADCs/DACs - Special Purpose Selection Notes

Select the AD7581LN when an 8-bit resolution and 8-channel multiplexing capability are required at low sampling speeds. It is suitable for applications where wide input voltage ranges exceed standard rail-to-rail limits. Compare DNL/INL specifications against system accuracy requirements. Consider the parallel interface complexity if interfacing with modern serial-only microcontrollers.

ADCs/DACs - Special Purpose Part Context

The AD7581 belongs to the AD758x family of data acquisition systems from Analog Devices. This family includes variants such as the AD7581 (8-bit), AD7582 (12-bit), and AD7583 (16-bit). These components share similar architectural features but differ in resolution and channel counts. The AD7581LN represents the commercial temperature grade version in the PDIP package.

ADCs/DACs - Special Purpose Replacement Considerations

Direct pin-compatible replacements within the same family include the AD7581KNZ (RoHS compliant) or AD7581JN. For higher resolution needs, consider the AD7582 series. Verify that any substitute maintains the same 28-pin PDIP footprint and logic voltage levels.