ADC0802LCN-P Equivalent & Substitute Parts

Part Overview

The ADC0802LCN-P 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, housed in a 20-pin DIP package for through-hole mounting.

The ADC0802LCN-P is classified as obsolete. Due to its discontinued status and limited availability for new designs, identifying functionally equivalent alternatives is necessary for system continuity, design updates, and long-term supply chain reliability.

Substiute Parts

ADC0802LCN-P

Texas InstrumentsIn Stock: 1105ADC0802LCN-P Datasheet

Current PartRFQ

ADC0831CCN/NOPB

Texas InstrumentsIn Stock: 5819ADC0831CCN/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ADC0802LCN-P is determined by the following critical parameters:

Core Functional Requirements:

• Resolution: 8-bit conversion capability
• Architecture: SAR-based analog-to-digital conversion
• Single converter configuration
• Supply voltage compatibility: 4.5V ~ 6.3V range for both analog and digital supplies
• Reference type: External reference capability

Interface and Application Considerations:

• Input configuration: Single-channel capability with differential input support
• Data interface type and protocol
• Package form factor and mounting technology
• Operating temperature range

The ADC0831CCN/NOPB qualifies as a substitute based on matching core functional parameters (8-bit resolution, SAR architecture, single converter, compatible supply voltages, and external reference support). However, differences exist in data interface (SPI vs. Parallel), input type flexibility, sampling rate, and package form factor, which must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The ADC0802LCN-P is obsolete, while the ADC0831CCN/NOPB maintains active product status from Texas Instruments. Active status ensures ongoing availability, technical support, and compliance with current regulatory standards.

Compliance and Certification: The ADC0831CCN/NOPB carries REACH Unaffected status, indicating compliance with current environmental regulations. The ADC0802LCN-P is RoHS non-compliant, which may present constraints for new designs subject to RoHS requirements.

Interface Compatibility: Selection between these devices depends on system architecture. The ADC0802LCN-P uses parallel data output, while the ADC0831CCN/NOPB employs SPI serial interface. Existing designs utilizing parallel data acquisition require interface adaptation if substituting with the ADC0831CCN/NOPB.

Performance Characteristics: The ADC0831CCN/NOPB provides higher sampling rate (31.25 kHz vs. 10 kHz), supporting applications requiring faster conversion cycles. Both devices maintain identical 8-bit resolution and compatible supply voltage ranges.

Package Considerations: The ADC0802LCN-P occupies a 20-pin DIP package, while the ADC0831CCN/NOPB uses an 8-pin DIP package. PCB layout modifications are necessary when substituting between these form factors.

Frequently Asked Questions (FAQ)

Q: Can the ADC0831CCN/NOPB directly replace the ADC0802LCN-P without circuit modifications?

A: Direct replacement is not possible without circuit modifications. The ADC0831CCN/NOPB uses SPI serial interface instead of parallel output, requiring changes to data acquisition circuitry and microcontroller interface logic. Additionally, the 8-pin package differs from the 20-pin package of the ADC0802LCN-P, necessitating PCB redesign.

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

A: Both devices share identical 8-bit resolution, SAR architecture, single-channel configuration, and supply voltage range (4.5V ~ 6.3V). Both support external reference configuration. The primary electrical differences are sampling rate (10 kHz vs. 31.25 kHz) and input type flexibility (differential only vs. differential, pseudo-differential, and single-ended).

Q: Is the ADC0831CCN/NOPB suitable for applications requiring 10 kHz sampling rate?

A: Yes. The ADC0831CCN/NOPB sampling rate of 31.25 kHz exceeds the 10 kHz requirement of the ADC0802LCN-P, providing adequate performance margin for equivalent or slower sampling applications.

Q: What compliance advantages does the ADC0831CCN/NOPB offer?

A: The ADC0831CCN/NOPB maintains active product status and carries REACH Unaffected certification, supporting compliance with current environmental regulations. The ADC0802LCN-P is RoHS non-compliant and obsolete, limiting suitability for new designs subject to modern regulatory requirements.

Q: Are both devices suitable for differential input applications?

A: The ADC0802LCN-P is configured exclusively for differential input. The ADC0831CCN/NOPB supports differential, pseudo-differential, and single-ended input configurations, providing greater flexibility for various signal conditioning approaches.

Q: What is the impact of package size difference on system design?

A: The ADC0802LCN-P uses a 20-pin DIP package while the ADC0831CCN/NOPB uses an 8-pin DIP package. This difference requires PCB layout redesign, including trace routing, component placement, and through-hole positioning. Both maintain 0.300" (7.62mm) row spacing, compatible with standard through-hole assembly processes.