ADC0803LCN/NOPB Equivalent & Substitute Parts

Part Overview

The ADC0803LCN/NOPB is an 8-bit Analog to Digital Converter manufactured by Texas Instruments, designed for single-channel data acquisition applications with differential input configuration. This device operates as a Successive Approximation Register (SAR) ADC with a 10 kHz sampling rate and parallel data interface. The product is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

ADC0803LCN/NOPB

Texas InstrumentsIn Stock: 1077ADC0803LCN/NOPB Datasheet

Current PartRFQ

ADC0831CCN/NOPB

Texas InstrumentsIn Stock: 5819ADC0831CCN/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ADC0803LCN/NOPB is determined by the following critical parameters:

• Resolution: 8-bit conversion capability
• Sampling Rate: Minimum 10 kHz performance requirement
• Supply Voltage Range: 4.5V to 6.3V compatibility for both analog and digital supplies
• Operating Temperature: -40°C to 85°C range
• Architecture: SAR-based analog-to-digital conversion
• Input Configuration: Single-channel capability with differential input support
• RoHS Compliance: ROHS3 Compliant status

The ADC0831CCN/NOPB qualifies as a manufacturer-recommended substitute based on matching core electrical specifications, identical supply voltage ranges, overlapping temperature operating range, and equivalent RoHS compliance status. While the substitute introduces differences in data interface (SPI versus parallel), package form factor (8-DIP versus 20-DIP), and enhanced sampling rate (31.25 kHz versus 10 kHz), these represent functional improvements rather than incompatibilities for applications requiring 8-bit analog-to-digital conversion.

Parameter Comparison

Engineering Selection Recommendations

The ADC0831CCN/NOPB is designated as the manufacturer-recommended substitute for the obsolete ADC0803LCN/NOPB. Selection of this substitute is supported by:

• Product Status: The ADC0831CCN/NOPB maintains active product status, ensuring continued availability and manufacturer support, whereas the ADC0803LCN/NOPB is obsolete.
• Electrical Compatibility: Both devices operate within identical supply voltage ranges (4.5V to 6.3V) and temperature specifications (-40°C to 85°C), ensuring direct functional replacement in existing power delivery and thermal management designs.
• Compliance Alignment: Both components maintain ROHS3 compliance status, satisfying regulatory requirements for new designs and legacy system updates.
• Core Functionality: Both devices provide 8-bit SAR-based analog-to-digital conversion with single-channel input capability, preserving the fundamental data acquisition function.

Frequently Asked Questions (FAQ)

Q: Can the ADC0831CCN/NOPB directly replace the ADC0803LCN/NOPB in existing PCB designs?

A: Direct socket replacement is not possible due to package differences (8-DIP versus 20-DIP). PCB redesign is required. However, the electrical specifications and supply voltage requirements are compatible, allowing functional substitution with circuit board layout modifications.

Q: What is the primary difference between these two devices?

A: The ADC0803LCN/NOPB uses a parallel data interface with a 10 kHz sampling rate in a 20-DIP package. The ADC0831CCN/NOPB uses a serial SPI interface with a 31.25 kHz sampling rate in a smaller 8-DIP package. Both maintain 8-bit resolution and identical supply voltage specifications.

Q: Are there input configuration differences between these devices?

A: The ADC0803LCN/NOPB supports differential input configuration only. The ADC0831CCN/NOPB supports differential, pseudo-differential, and single-ended input configurations, providing greater flexibility for signal conditioning applications.

Q: Does the substitute part maintain the same operating temperature range?

A: Yes, both devices operate across the -40°C to 85°C temperature range, ensuring compatibility in industrial and extended-temperature applications.

Q: What compliance certifications apply to both devices?

A: Both components are ROHS3 compliant and REACH unaffected. The ADC0803LCN/NOPB explicitly maintains ROHS3 status; compliance status for the ADC0831CCN/NOPB follows the same regulatory framework.