AD8139ARD Equivalent & Substitute Parts

Part Overview

The AD8139ARD is a differential amplifier integrated circuit manufactured by Analog Devices Inc., designed for linear amplification applications requiring differential signal processing with rail-to-rail output capability. This device is classified as obsolete, necessitating identification of active equivalent parts for continued system design and procurement. The AD8139ARD operates as a single-circuit differential amplifier in an 8-SOIC surface mount package with exposed pad, suitable for applications requiring high-speed differential signal conditioning.

Substiute Parts

AD8139ARD

Analog Devices Inc.In Stock: 2263AD8139ARD Datasheet

Current PartRFQ

AD8139ARDZ

Analog Devices Inc.In Stock: 1311AD8139ARDZ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AD8139ARD is determined by strict equivalence across all electrical and mechanical parameters. The primary substitute identified is the AD8139ARDZ, which maintains identical specifications across amplifier type, circuit count, output configuration, slew rate, bandwidth, bias current, input offset voltage, supply current, output current capability, supply voltage range, operating temperature range, package type, and moisture sensitivity classification.

The substitution logic is based on the following key parameters that must remain constant:

• Differential amplifier topology with single circuit configuration
• Differential rail-to-rail output type
• Slew rate of 800 V/µs
• -3dB bandwidth of 410 MHz
• Input bias current of 2.25 µA
• Input offset voltage of 150 µV
• Supply current of 24.5 mA
• Output current per channel of 100 mA
• Supply voltage range of 4.5 V to 12 V
• Operating temperature range of -40°C to 125°C
• 8-SOIC surface mount package with exposed pad
• MSL rating of 3 (168 Hours)

Parameter Comparison

Engineering Selection Recommendations

The AD8139ARDZ is the direct equivalent substitute for the AD8139ARD. Both parts share identical electrical and mechanical specifications, ensuring functional interchangeability in circuit applications. The primary distinction between these parts is product status and compliance certification.

The AD8139ARD is classified as obsolete, indicating discontinued manufacturing and limited availability. The AD8139ARDZ maintains active product status with current manufacturing support from Analog Devices Inc., ensuring long-term availability and supply chain reliability.

The AD8139ARDZ carries ROHS3 compliance certification and REACH unaffected status, meeting current regulatory requirements for electronic component procurement in regulated industries and markets. These certifications provide assurance of environmental and hazardous substance compliance.

Both parts are supplied in 8-SOIC surface mount packages with exposed pad, maintaining identical PCB footprint and assembly compatibility. The packaging difference (tube for AD8139ARDZ versus unspecified for AD8139ARD) does not affect electrical performance or mechanical fit.

For new designs and procurement of replacement components, the AD8139ARDZ is the appropriate selection, offering equivalent performance with active product support and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Are the AD8139ARD and AD8139ARDZ electrically identical?

A: Yes. Both parts share identical electrical specifications across all parameters including slew rate, bandwidth, input bias current, input offset voltage, supply current, output current, supply voltage range, and operating temperature range. They are functionally equivalent differential amplifiers.

Q: What is the difference between AD8139ARD and AD8139ARDZ?

A: The primary differences are product status and compliance certifications. The AD8139ARD is obsolete with no active manufacturing, while the AD8139ARDZ is an active product with current production support. The AD8139ARDZ carries ROHS3 compliance and REACH unaffected status. The packaging format differs (tube for AD8139ARDZ), but both use the same 8-SOIC surface mount package with exposed pad.

Q: Can I use AD8139ARDZ as a direct replacement for AD8139ARD in existing designs?

A: Yes. The AD8139ARDZ is a direct substitute with identical electrical and mechanical specifications. No circuit modifications or PCB redesign are required. The 8-SOIC package footprint is identical, and all electrical parameters match exactly.

Q: What does the "ARD" and "ARDZ" designation indicate?

A: These designations represent different packaging and supply formats from Analog Devices Inc. The "ARD" suffix indicates the base part number variant, while "ARDZ" indicates the same part in tube packaging format. The electrical specifications remain identical between these variants.

Q: Is the AD8139ARDZ suitable for applications requiring ROHS compliance?

A: Yes. The AD8139ARDZ is ROHS3 compliant and REACH unaffected, meeting environmental and hazardous substance restrictions applicable to electronic components in regulated markets.

Q: What is the moisture sensitivity level for these parts?

A: Both the AD8139ARD and AD8139ARDZ carry an MSL rating of 3 (168 Hours), indicating moderate moisture sensitivity. Standard moisture control procedures during storage, handling, and assembly are required.

Q: Are there any other equivalent parts to the AD8139ARD besides the AD8139ARDZ?

A: Based on the provided specifications, the AD8139ARDZ is the identified equivalent substitute. Both parts share the same base product number (AD8139) and maintain identical electrical and mechanical parameters.