AD8131AR Equivalent & Substitute Parts

Part Overview

The AD8131AR is a differential amplifier integrated circuit manufactured by Analog Devices Inc., designed for linear amplification applications requiring single-circuit differential output configuration. The device is packaged in an 8-SOIC surface mount package and operates across an industrial temperature range of -40°C to 125°C.

The AD8131AR holds an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this differential amplifier topology.

Substiute Parts

AD8131AR

Analog Devices Inc.In Stock: 2227AD8131AR Datasheet

Current PartRFQ

AD8131ARZ

Analog Devices Inc.In Stock: 20185AD8131ARZ Datasheet

DirectRFQ

THS4500CD

Texas InstrumentsIn Stock: 796THS4500CD Datasheet

SimilarRFQ

THS4500ID

Texas InstrumentsIn Stock: 1285THS4500ID Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AD8131AR is determined by the following critical parameters:

Mandatory Matching Criteria:

• Amplifier Type: Differential
• Number of Circuits: 1
• Output Type: Differential
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

Performance Parameters Defining Substitution Class:

• Slew Rate: 2000 V/µs (minimum acceptable)
• -3dB Bandwidth: 400 MHz (minimum acceptable)
• Current - Input Bias: 500 nA (maximum acceptable)
• Voltage - Input Offset: 1.5 mV (maximum acceptable)
• Current - Supply: 11.5 mA (maximum acceptable)
• Current - Output / Channel: 60 mA (minimum acceptable)
• Voltage - Supply Span: 2.8 V to 11 V (operating range)
• Operating Temperature: -40°C to 125°C (industrial range)

The AD8131ARZ represents a direct equivalent with identical electrical specifications and packaging. The THS4500ID and THS4500CD devices from Texas Instruments provide similar functional capability within the same package footprint but exhibit performance variations in slew rate, bandwidth, input bias current, input offset voltage, supply current, and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

AD8131ARZ (Analog Devices Inc.)

The AD8131ARZ is the primary substitute for the obsolete AD8131AR. This device maintains identical electrical specifications across all measured parameters, including slew rate, bandwidth, input bias current, input offset voltage, supply current, output current capability, and supply voltage range. The AD8131ARZ operates across the same industrial temperature range (-40°C to 125°C) and is packaged in the identical 8-SOIC surface mount configuration. The part holds active product status and carries ROHS3 compliance certification, supporting modern manufacturing and environmental requirements. Tube packaging is available. This substitution requires no circuit redesign or performance re-evaluation.

THS4500ID (Texas Instruments)

The THS4500ID provides functional equivalence within the same 8-SOIC package footprint. This device exhibits higher slew rate performance (2800 V/µs versus 2000 V/µs) and increased output current capability (120 mA versus 60 mA per channel). However, the THS4500ID demonstrates higher input bias current (4 µA versus 500 nA), higher input offset voltage (4 mV versus 1.5 mV), and elevated supply current consumption (23 mA versus 11.5 mA). The operating temperature range extends to -40°C to 85°C, which is narrower than the AD8131AR specification at the upper limit. The minimum supply voltage requirement is 4.5 V, exceeding the AD8131AR minimum of 2.8 V. The device holds active product status and carries ROHS3 compliance certification. Application suitability depends on tolerance for increased power consumption and relaxed input precision specifications.

THS4500CD (Texas Instruments)

The THS4500CD shares the same base performance characteristics as the THS4500ID but operates within a commercial temperature range of 0°C to 70°C. This narrower operating temperature range restricts applicability to systems not requiring extended low-temperature operation below 0°C or high-temperature operation above 70°C. The device exhibits identical electrical performance variations relative to the AD8131AR as documented for the THS4500ID. The THS4500CD holds active product status and carries ROHS3 compliance certification. Selection of this variant is appropriate only for applications with commercial temperature requirements.

Frequently Asked Questions (FAQ)

Q: Can the AD8131ARZ be used as a direct replacement for the AD8131AR without circuit modification?

A: Yes. The AD8131ARZ maintains identical electrical specifications and package configuration. No circuit redesign is required. The primary difference is product status transition from obsolete to active, with added ROHS3 compliance certification.

Q: What are the key performance differences between the AD8131AR and THS4500ID?

A: The THS4500ID provides higher slew rate (2800 V/µs versus 2000 V/µs) and greater output current per channel (120 mA versus 60 mA). However, it exhibits higher input bias current (4 µA versus 500 nA), higher input offset voltage (4 mV versus 1.5 mV), higher supply current (23 mA versus 11.5 mA), and a narrower upper operating temperature limit (85°C versus 125°C). The minimum supply voltage is also higher at 4.5 V versus 2.8 V.

Q: Is the THS4500CD suitable for industrial temperature applications?

A: No. The THS4500CD operates within a commercial temperature range of 0°C to 70°C, which does not meet industrial specifications requiring operation to -40°C or above 70°C. The THS4500ID is the appropriate Texas Instruments alternative for extended temperature requirements.

Q: Are all substitute parts available in the same 8-SOIC package?

A: Yes. The AD8131ARZ, THS4500ID, and THS4500CD are all packaged in 8-SOIC (0.154", 3.90mm Width) surface mount configuration, ensuring identical PCB footprint compatibility.

Q: What compliance certifications apply to the substitute parts?

A: The AD8131ARZ, THS4500ID, and THS4500CD all carry ROHS3 compliance and REACH unaffected status certifications. All devices have moisture sensitivity level 1 (unlimited), indicating no special moisture handling requirements.

Q: Which substitute part requires the lowest supply voltage?

A: The AD8131ARZ maintains the lowest minimum supply voltage requirement at 2.8 V, identical to the original AD8131AR. The THS4500ID and THS4500CD both require a minimum of 4.5 V.

Q: Can the THS4500 series devices be used in low-power applications?

A: The THS4500 series exhibits higher supply current consumption (23 mA versus 11.5 mA for the AD8131AR). Applications with strict power budget constraints should prioritize the AD8131ARZ to maintain the original power profile.