ADC0804LCN/NOPB Equivalent & Substitute Parts

Part Overview

The ADC0804LCN/NOPB is an 8-bit Analog to Digital Converter manufactured by Texas Instruments, designed for single-channel data acquisition applications. This device features a Successive Approximation Register (SAR) architecture with external or supply voltage reference capability. The product is classified as Obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

ADC0804LCN/NOPB

Texas InstrumentsIn Stock: 2620ADC0804LCN/NOPB Datasheet

Current PartRFQ

ADC0831CCN/NOPB

Texas InstrumentsIn Stock: 5819ADC0831CCN/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ADC0804LCN/NOPB is determined by the following critical parameters:

• Resolution: 8-bit conversion capability
• Architecture: SAR-based analog to digital conversion
• Supply Voltage Range: 4.5V to 6.3V for both analog and digital supplies
• Reference Type: External or supply voltage reference capability
• Number of Converters: Single ADC per package

The ADC0831CCN/NOPB qualifies as a substitute based on matching resolution, architecture, supply voltage compatibility, and reference type. However, differences exist in data interface (SPI vs. Parallel), sampling rate, package configuration, and input type flexibility, which must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The ADC0831CCN/NOPB is an active product from Texas Instruments and represents a viable substitute for the obsolete ADC0804LCN/NOPB when application requirements align with the following conditions:

Compatibility Factors:

• Both devices maintain identical 8-bit resolution and SAR architecture
• Supply voltage ranges are identical (4.5V to 6.3V)
• Both support external reference configuration
• Through-hole mounting compatibility is maintained

Design Considerations:

• The ADC0831CCN/NOPB operates at a higher sampling rate (31.25k vs. 10k samples per second), suitable for applications requiring faster conversion speeds
• Data interface differs fundamentally: ADC0804LCN/NOPB uses parallel output while ADC0831CCN/NOPB uses SPI serial interface, requiring firmware or hardware interface redesign
• Package footprint differs: ADC0831CCN/NOPB uses 8-DIP versus 20-DIP for the original part, reducing board space requirements
• Operating temperature range is extended on the substitute (-40°C to 85°C vs. 0°C to 70°C)
• Input type flexibility is expanded on the substitute, supporting differential, pseudo-differential, and single-ended configurations

Compliance Status:

• ADC0831CCN/NOPB maintains active product status, ensuring long-term availability and support
• Both devices are REACH Unaffected and classified under ECCN EAR99

Frequently Asked Questions (FAQ)

Q: Can the ADC0831CCN/NOPB directly replace the ADC0804LCN/NOPB without circuit modifications?

A: No. While both devices share 8-bit resolution, SAR architecture, and compatible supply voltages, the data interface differs fundamentally. The ADC0804LCN/NOPB outputs data via parallel bus, while the ADC0831CCN/NOPB uses SPI serial communication. Circuit redesign and firmware modification are required.

Q: What are the key electrical compatibility parameters between these devices?

A: Both devices operate with identical analog and digital supply voltage ranges (4.5V to 6.3V), support external reference configuration, and maintain 8-bit conversion resolution. These parameters ensure core electrical compatibility.

Q: How do the package differences affect board design?

A: The ADC0804LCN/NOPB uses a 20-DIP package while the ADC0831CCN/NOPB uses an 8-DIP package. The substitute requires significantly less board space and different PCB footprint design. Pin assignments are not compatible between packages.

Q: Is the higher sampling rate of the ADC0831CCN/NOPB a requirement for substitution?

A: No. The higher sampling rate (31.25k vs. 10k samples per second) is an additional capability of the substitute. Applications requiring only 10k samples per second will function correctly with the ADC0831CCN/NOPB, though this capability remains unused.

Q: What is the impact of the extended operating temperature range on the ADC0831CCN/NOPB?

A: The ADC0831CCN/NOPB operates from -40°C to 85°C compared to 0°C to 70°C for the original part. This extended range provides greater flexibility for applications in extreme temperature environments, though it does not restrict use in standard temperature ranges.

Q: Are there reference voltage configuration differences between these devices?

A: The ADC0804LCN/NOPB supports both external and supply voltage reference types. The ADC0831CCN/NOPB supports external reference only. Applications using supply voltage reference must be redesigned to use external reference configuration with the substitute.