AD7574KNZ Equivalent & Substitute Parts

Part Overview

The AD7574KNZ is an 8-bit Analog to Digital Converter (ADC) manufactured by Analog Devices Inc., configured as a single-channel SAR (Successive Approximation Register) architecture device in an 18-PDIP package. This component is currently classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new design implementations. The device operates with external voltage references and dual 5V supply rails (analog and digital), making it suitable for legacy industrial and instrumentation applications requiring 8-bit conversion resolution.

Substiute Parts

AD7574KNZ

Analog Devices Inc.In Stock: 7658AD7574KNZ Datasheet

Current PartRFQ

AD7574JNZ

Analog Devices Inc.In Stock: 1840AD7574JNZ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AD7574KNZ is determined by strict equivalence across the following critical parameters:

• Resolution: 8-bit conversion capability
• Channel Configuration: Single input channel with single-ended topology
• Architecture: SAR-based conversion methodology
• Interface: Parallel data output
• Reference Architecture: External voltage reference requirement
• Supply Voltages: Dual 5V rails (analog and digital domains)
• Operating Temperature: 0°C to 70°C range
• Package Footprint: 18-PDIP form factor with 0.300" (7.62mm) pitch
• Mounting: Through-hole PCB assembly compatibility

The AD7574JNZ meets all these criteria and is classified as a direct substitute. The primary distinction between the main part and its substitute relates to product lifecycle status and packaging configuration, not functional or electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

The AD7574JNZ is the direct functional equivalent of the AD7574KNZ. Selection between these parts should be based on the following criteria:

For New Designs and Ongoing Production: The AD7574JNZ is the appropriate choice. This part maintains active product status with Analog Devices Inc., ensuring continued availability and technical support. The device carries ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements for commercial and industrial applications.

For Legacy System Maintenance: The AD7574KNZ remains electrically and mechanically compatible with existing circuit implementations. However, given its obsolete classification, sourcing may present challenges. The AD7574JNZ provides identical electrical performance and pinout compatibility, enabling direct substitution in repair and retrofit scenarios.

Compliance Considerations: The AD7574JNZ's ROHS3 compliance and REACH unaffected designation make it suitable for applications subject to environmental regulations. Both parts share identical MSL ratings, indicating equivalent moisture handling requirements during storage and assembly.

Frequently Asked Questions (FAQ)

Q: Can the AD7574JNZ be used as a direct replacement for the AD7574KNZ in existing circuit boards?

A: Yes. Both parts are electrically and mechanically identical across all functional parameters. The 18-PDIP package footprint, pin configuration, supply voltage requirements, and conversion specifications are equivalent. Direct PCB substitution is feasible without circuit modification.

Q: What is the primary difference between these two part numbers?

A: The AD7574KNZ is classified as obsolete, while the AD7574JNZ maintains active product status. The AD7574JNZ also carries ROHS3 compliance and REACH unaffected certifications. Electrical and functional performance are identical.

Q: Are there any temperature or supply voltage differences between these parts?

A: No. Both parts operate across the identical temperature range (0°C to 70°C) and require the same dual 5V supply configuration (analog and digital). Operating characteristics are fully equivalent.

Q: Does the packaging format differ between these parts?

A: The primary packaging difference is configuration: the AD7574KNZ uses standard packaging, while the AD7574JNZ is supplied in tube packaging. Both maintain the 18-PDIP form factor with 0.300" (7.62mm) pitch. Through-hole mounting compatibility is identical.

Q: What is the MSL rating for these components?

A: Both parts carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions during storage or assembly processes.

Q: Are these parts suitable for new product designs?

A: The AD7574JNZ is appropriate for new designs. The AD7574KNZ, being obsolete, is not recommended for new development. The AD7574JNZ provides equivalent functionality with active manufacturer support and current compliance certifications.