AD677JR Equivalent & Substitute Parts

Part Overview

The AD677JR is a 16-bit Analog to Digital Converter (ADC) manufactured by Analog Devices Inc., configured as a single-channel SAR (Successive Approximation Register) architecture device in a 28-SOIC surface mount package. The device operates with external voltage references, dual supply rails (±12V analog, 5V digital), and delivers a 100 kHz sampling rate with serial data interface output.

The AD677JR is classified as obsolete. Locating equivalent substitute parts is necessary to support legacy system maintenance, board-level repairs, and production continuity for applications where this specific device was originally specified.

Substiute Parts

AD677JR

Analog Devices Inc.In Stock: 1684AD677JR Datasheet

Current PartRFQ

AD677JRZ

Analog Devices Inc.In Stock: 1365AD677JRZ Datasheet

DirectRFQ

AD677KRZ

Analog Devices Inc.In Stock: 3252AD677KRZ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AD677JR are identified based on electrical and mechanical parameter equivalence within the AD677 base product family. All substitute candidates maintain identical specifications across the following critical parameters:

• 16-bit resolution
• 100 kHz sampling rate
• Single-channel, single-ended input configuration
• SAR architecture with external reference
• Serial data interface
• ±12V analog and 5V digital supply requirements
• 28-SOIC package footprint and pinout
• Operating temperature range (0°C to 70°C)
• Moisture sensitivity level (MSL 5)

The primary distinction between the main part and substitutes is product status and packaging format. The AD677JR (obsolete, loose packaging) is functionally equivalent to active production variants offered in tube packaging.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete AD677JR, both AD677JRZ and AD677KRZ are direct functional substitutes. Selection between these two active alternatives should be based on the following factors:

AD677JRZ is the direct product line continuation of the AD677JR, maintaining identical electrical and mechanical specifications while offering active production status, ROHS3 compliance, and REACH unaffected certification. This part is supplied in tube packaging format.

AD677KRZ provides equivalent electrical performance and package compatibility with the same compliance certifications (ROHS3, REACH unaffected). This variant is also supplied in tube packaging and represents an alternative within the active AD677 product family.

Both substitutes are suitable for drop-in replacement in existing circuit designs without modification to PCB layout, schematic connections, or firmware interfaces. Inventory availability should be evaluated based on procurement lead times and supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can AD677JRZ and AD677KRZ be used interchangeably with AD677JR?

A: Yes. All three parts share identical electrical specifications (16-bit resolution, 100 kHz sampling rate, ±12V/5V supply, serial interface, external reference), identical pin configurations in the 28-SOIC package, and identical operating temperature ranges. Schematic and PCB designs require no modification.

Q: What is the difference between AD677JRZ and AD677KRZ?

A: Both parts are functionally equivalent with identical electrical and mechanical parameters. The primary difference is product designation within the AD677 family. Both are active production parts with ROHS3 compliance and REACH unaffected status. Selection may be based on supplier availability and inventory levels.

Q: Why is the AD677JR classified as obsolete?

A: The AD677JR has been superseded by active production variants (AD677JRZ and AD677KRZ) within the AD677 product family. Analog Devices Inc. has transitioned manufacturing to these successor parts while maintaining full electrical and mechanical compatibility.

Q: Are there any compliance or certification differences between these parts?

A: The AD677JR does not specify RoHS or REACH compliance status. Both AD677JRZ and AD677KRZ are certified ROHS3 compliant and REACH unaffected. For applications requiring documented compliance, the active variants are preferred.

Q: Does packaging format affect electrical performance?

A: No. The AD677JR (loose packaging) and the substitute parts (tube packaging) are electrically identical. Packaging format affects only handling, storage, and supply chain logistics. Moisture sensitivity level (MSL 5, 48 hours) applies uniformly across all three parts.

Q: Can these parts be used in new designs?

A: AD677JRZ and AD677KRZ are active production parts suitable for new designs. The AD677JR should not be specified for new designs due to obsolete status. For legacy system support or repair applications, the active substitutes provide direct compatibility.