AD677KN 16-Bit SAR Analog-to-Digital Converter Equivalent & Substitute Parts

Part Overview

The AD677KN is a 16-bit successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc., designed for single-ended input data acquisition applications. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support, maintenance, and new design implementations where this architecture remains suitable.

Substiute Parts

AD677KN

Analog Devices Inc.In Stock: 1380AD677KN Datasheet

Current PartRFQ

AD677KNZ

Analog Devices Inc.In Stock: 1659AD677KNZ Datasheet

DirectRFQ

AD677JNZ

Analog Devices Inc.In Stock: 1791AD677JNZ Datasheet

Parametric EquivalentRFQ

AD677KD

Analog Devices Inc.In Stock: 1506AD677KD Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AD677KN is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters must remain identical for direct substitution:

• 16-bit resolution
• 100 kSPS sampling rate
• Single-ended input configuration
• Serial data interface
• External reference requirement
• ±12V analog and 5V digital supply voltages
• 0°C to 70°C operating temperature range
• 16-DIP through-hole package

All identified substitute parts maintain these specifications without deviation. Substitution is classified as either direct (identical packaging and product status) or parametric equivalent (identical electrical specifications with active product status and enhanced compliance certifications).

Parameter Comparison

Engineering Selection Recommendations

AD677KNZ is the primary direct substitute for AD677KN. Both parts share identical electrical specifications and package configuration. AD677KNZ carries active product status and ROHS3 compliance certification, providing enhanced supply chain availability and regulatory alignment compared to the obsolete AD677KN.

AD677KD is a parametric equivalent suitable for applications where bulk packaging is preferred over tube packaging. This part maintains all electrical specifications and offers active product status with ROHS3 compliance. Selection between AD677KNZ and AD677KD depends solely on packaging requirements and procurement preferences.

AD677JNZ is a parametric equivalent offering identical electrical performance and active product status with ROHS3 compliance. This part is functionally interchangeable with AD677KN in all applications meeting the specified parameter set.

Selection among these three active alternatives should be based on packaging format availability, supply chain lead times, and inventory requirements. All three parts are electrically and mechanically compatible with designs originally specified for AD677KN.

Frequently Asked Questions (FAQ)

Q: Can AD677KNZ directly replace AD677KN in existing designs?

A: Yes. AD677KNZ is electrically and mechanically identical to AD677KN. The primary difference is product status (active versus obsolete) and packaging format (tube versus bulk). No circuit modifications are required.

Q: What is the difference between AD677KNZ and AD677KD?

A: Both parts are parametric equivalents with identical electrical specifications. The distinction is packaging format: AD677KNZ is supplied in tube packaging, while AD677KD is supplied in bulk packaging. Selection depends on procurement and assembly requirements.

Q: Are all substitute parts ROHS3 compliant?

A: AD677KNZ, AD677JNZ, and AD677KD are all ROHS3 compliant. The original AD677KN does not specify RoHS status due to its obsolete classification.

Q: Does package type affect electrical performance?

A: No. The 16-DIP through-hole package is identical across all parts. Packaging format (tube versus bulk) affects only handling, storage, and procurement logistics, not electrical or mechanical performance.

Q: Can I use AD677JNZ if my design specifies AD677KN?

A: Yes. AD677JNZ maintains all electrical and mechanical specifications required for AD677KN compatibility. The part is functionally interchangeable in all applications.

Q: What is the inventory status of these substitute parts?

A: AD677KNZ, AD677JNZ, and AD677KD are all currently in stock as new original components, providing reliable supply chain access for immediate procurement.