AD678BJ Equivalent & Substitute Parts

Part Overview

The AD678BJ is a 12-bit flash analog-to-digital converter manufactured by Analog Devices Inc., designed for single-ended input data acquisition applications. It features a 200 kHz sampling rate, parallel data interface, and internal voltage reference with ±12V analog and 5V digital supply requirements. The device is packaged in a 44-JLCC surface mount configuration.

The AD678BJ is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance or redesign initiatives.

Substiute Parts

AD678BJ

Analog Devices Inc.In Stock: 926AD678BJ Datasheet

Current PartRFQ

AD678AJ

Analog Devices Inc.In Stock: 1708AD678AJ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AD678BJ is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part must match the following criteria:

• Resolution: 12 bits
• Sampling rate: 200 kHz
• Input configuration: 1 single-ended input
• Data interface: Parallel
• Architecture: Flash ADC
• Reference: Internal
• Supply voltages: ±12V analog, 5V digital
• Operating temperature range: -40°C to 85°C
• Package: 44-CLCC (J-Lead) surface mount
• Moisture sensitivity: MSL 1

The AD678AJ meets all these parameters and is therefore a direct substitute for the AD678BJ.

Parameter Comparison

Engineering Selection Recommendations

The AD678AJ is the direct substitute for the AD678BJ. Both devices are manufactured by Analog Devices Inc. and share identical electrical specifications and physical packaging.

The primary distinction is product status: the AD678BJ is obsolete, while the AD678AJ is active. The AD678AJ is RoHS3 compliant and REACH unaffected, providing compliance advantages for new designs and ongoing production.

For applications currently using the AD678BJ, the AD678AJ provides full functional and mechanical compatibility without design modification. The active product status of the AD678AJ ensures continued availability and supply chain support.

Frequently Asked Questions (FAQ)

Q: Can the AD678AJ directly replace the AD678BJ without circuit modification?

A: Yes. The AD678AJ is electrically and mechanically identical to the AD678BJ. No circuit changes are required for substitution.

Q: What is the primary reason to substitute the AD678BJ?

A: The AD678BJ is obsolete. The AD678AJ is the active equivalent part, ensuring supply availability and long-term support.

Q: Are there packaging differences between the AD678BJ and AD678AJ?

A: No. Both devices use the 44-JLCC (16.39x16.39) surface mount package. PCB footprints and assembly processes remain unchanged.

Q: Does the AD678AJ meet current compliance standards?

A: Yes. The AD678AJ is RoHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Q: Are the supply voltage requirements identical?

A: Yes. Both devices require ±12V analog supply and 5V digital supply with identical operating specifications.

Q: What is the sampling rate for both devices?

A: Both the AD678BJ and AD678AJ operate at 200 kHz sampling rate with 12-bit resolution.