AD8131ARM Equivalent & Substitute Parts

Part Overview

The AD8131ARM is a differential amplifier integrated circuit manufactured by Analog Devices Inc., designed for high-speed signal conditioning applications. This device features a single differential amplifier circuit in an 8-MSOP surface mount package with a slew rate of 2000V/µs and -3dB bandwidth of 400 MHz. The AD8131ARM is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity. Substitute parts must maintain functional equivalence in differential amplification while accommodating the electrical and mechanical constraints of the original design.

Substiute Parts

AD8131ARM

Analog Devices Inc.In Stock: 3356AD8131ARM Datasheet

Current PartRFQ

AD8131ARMZ

Analog Devices Inc.In Stock: 20497AD8131ARMZ Datasheet

DirectRFQ

THS4500IDGK

Texas InstrumentsIn Stock: 778THS4500IDGK Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AD8131ARM are identified based on strict equivalence in the following critical parameters:

Primary Substitution Criteria:

• Amplifier Type: Differential
• Number of Circuits: 1
• Output Type: Differential
• Mounting Type: Surface Mount
• Package compatibility: 8-pin surface mount configuration
• Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Parameters:

• Slew Rate: Minimum 2000V/µs
• -3dB Bandwidth: Minimum 400 MHz
• Current - Input Bias: Maximum 500 nA
• Voltage - Input Offset: Maximum 1.5 mV
• Current - Supply: Maximum 11.5 mA
• Current - Output / Channel: Minimum 60 mA
• Voltage - Supply Span: Minimum 2.8V to Maximum 11V
• Operating Temperature Range: -40°C to 125°C

Substitute parts must satisfy all primary criteria and maintain compatibility within the secondary parameter ranges to ensure functional equivalence in the original application circuit.

Parameter Comparison

Engineering Selection Recommendations

AD8131ARMZ (Analog Devices Inc.)

The AD8131ARMZ is the direct successor to the AD8131ARM, manufactured by the same supplier with identical electrical specifications. This part is classified as Active product status, ensuring long-term availability and supply chain continuity. The AD8131ARMZ maintains 100% parameter equivalence with the original AD8131ARM across all critical differential amplifier specifications. This part carries ROHS3 compliance and REACH Unaffected status, meeting current environmental and regulatory requirements. The AD8131ARMZ is supplied in Tube packaging and represents the primary recommended substitute for direct replacement applications.

THS4500IDGK (Texas Instruments)

The THS4500IDGK is an alternative differential amplifier from Texas Instruments suitable for applications where the AD8131ARM specifications can accommodate parameter variations. This part exceeds the original slew rate specification (2800V/µs versus 2000V/µs) and provides higher output current capability (120 mA versus 60 mA per channel). The THS4500IDGK operates within a higher minimum supply voltage range (4.5V minimum versus 2.8V minimum) and supports extended maximum supply voltage (15V versus 11V). The operating temperature range is limited to -40°C to 85°C, which is narrower than the original specification. The THS4500IDGK is classified as Active product status with ROHS3 compliance and REACH Unaffected status. This part is suitable for applications where the higher supply voltage requirement and narrower temperature range are acceptable trade-offs for enhanced performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can AD8131ARMZ be used as a direct replacement for AD8131ARM?

A: Yes. The AD8131ARMZ is electrically and mechanically equivalent to the AD8131ARM. Both parts share identical differential amplifier specifications, package configuration, and operating parameters. The primary difference is product status: AD8131ARMZ is Active while AD8131ARM is Obsolete. AD8131ARMZ is the recommended direct replacement.

Q: What are the key differences between AD8131ARMZ and THS4500IDGK?

A: Both parts are differential amplifiers in compatible 8-pin surface mount packages. AD8131ARMZ maintains identical specifications to the original AD8131ARM. THS4500IDGK offers higher slew rate (2800V/µs), higher output current (120 mA), and extended maximum supply voltage (15V), but requires higher minimum supply voltage (4.5V) and operates over a narrower temperature range (-40°C to 85°C versus -40°C to 125°C).

Q: Is the THS4500IDGK suitable for low-voltage applications?

A: No. The THS4500IDGK requires a minimum supply voltage of 4.5V, whereas the AD8131ARM operates at 2.8V minimum. Applications requiring operation below 4.5V supply voltage must use AD8131ARMZ or the original AD8131ARM.

Q: Are there packaging differences between these parts?

A: All three parts use compatible 8-pin surface mount packages (8-TSSOP, 8-MSOP with 0.118" width, 3.00mm). AD8131ARM and AD8131ARMZ use 8-MSOP supplier device package, while THS4500IDGK uses 8-VSSOP supplier device package. Pin-to-pin compatibility exists for standard differential amplifier applications.

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

A: All three parts carry Moisture Sensitivity Level (MSL) 1, classified as Unlimited. This indicates minimal moisture sensitivity and no special handling requirements during storage or assembly.

Q: Which part should be selected for new designs?

A: For new designs, AD8131ARMZ is recommended as it maintains full compatibility with the original AD8131ARM specifications while offering Active product status and long-term availability. THS4500IDGK may be selected if the higher performance characteristics (slew rate, output current, supply voltage range) align with application requirements and the narrower operating temperature range is acceptable.

Q: Are these parts RoHS compliant?

A: AD8131ARMZ and THS4500IDGK are both ROHS3 Compliant. The original AD8131ARM RoHS status is not specified in the provided data.