AMP04FSZ-RL Equivalent & Substitute Parts

Part Overview

The AMP04FSZ-RL is an instrumentation amplifier integrated circuit manufactured by Analog Devices Inc., designed for single-circuit applications in 8-SOIC surface mount packaging. This linear amplifier operates across a supply voltage range of 5 V to 30 V and maintains active product status with full RoHS3 compliance. The device is currently in stock with 1,046 units available.

Substitute parts are identified when equivalent functional performance can be achieved within the specified electrical and mechanical parameters of the instrumentation amplifier category, particularly when the original part becomes unavailable or when alternative packaging formats are required for manufacturing flexibility.

Substiute Parts

AMP04FSZ-RL

Analog Devices Inc.In Stock: 1099AMP04FSZ-RL Datasheet

Current PartRFQ

INA126U

Texas InstrumentsIn Stock: 3633INA126U Datasheet

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INA126U/2K5

Texas InstrumentsIn Stock: 4012INA126U/2K5 Datasheet

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INA126UA

Texas InstrumentsIn Stock: 5681INA126UA Datasheet

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INA126UA/2K5

Texas InstrumentsIn Stock: 32733INA126UA/2K5 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AMP04FSZ-RL is determined by strict alignment with the following critical parameters:

Mechanical Compatibility:

• Package type: 8-SOIC (0.154", 3.90mm Width)
• Mounting type: Surface Mount
• Pin count and footprint equivalence

Functional Compatibility:

• Amplifier type: Instrumentation
• Number of circuits: 1
• Operating temperature range: -40°C ~ 85°C minimum

Electrical Operating Range:

• Supply voltage span minimum: 5 V or lower
• Supply voltage span maximum: 30 V or higher
• Input bias current: 22 nA or lower
• Input offset voltage: 30 µV or lower
• Supply current: 750 µA or lower
• Output current per channel: 30 mA or higher
• Bandwidth: 700 kHz or higher

Compliance Requirements:

• RoHS3 compliance mandatory
• Active product status required

The Texas Instruments INA126 series parts (INA126U, INA126U/2K5, INA126UA, INA126UA/2K5) meet all mechanical and functional compatibility criteria. However, electrical parameter variations exist that must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

All four Texas Instruments INA126 series substitutes maintain active product status and full RoHS3 compliance, meeting regulatory requirements equivalent to the AMP04FSZ-RL.

Electrical Performance Considerations:

The INA126 series parts operate with a lower minimum supply voltage (2.7 V versus 5 V), providing broader application flexibility. However, the AMP04FSZ-RL delivers superior performance in three critical electrical parameters: input bias current (22 nA versus 10 nA), input offset voltage (30 µV versus 100–150 µV), and output current capability (30 mA versus 10 mA). The AMP04FSZ-RL also provides significantly higher bandwidth (700 kHz versus 200 kHz).

Packaging and Moisture Sensitivity:

The AMP04FSZ-RL features MSL Level 1 (unlimited moisture sensitivity), providing superior shelf-life stability compared to INA126U variants (MSL Level 3, 168 hours) and INA126UA variants (MSL Level 2, 1 year). This distinction is critical for long-term inventory management and storage conditions.

Substitution Applicability:

INA126U and INA126U/2K5 are functionally equivalent to each other, differing only in packaging format (Tube versus Cut Tape & Digi-Reel). Similarly, INA126UA and INA126UA/2K5 are functionally equivalent, also differing only in packaging format. Selection between U and UA variants depends on input offset voltage tolerance requirements (100 µV versus 150 µV).

Substitution of AMP04FSZ-RL with INA126 series parts is appropriate only when the reduced output current capability (10 mA versus 30 mA), lower bandwidth (200 kHz versus 700 kHz), and higher input offset voltage (100–150 µV versus 30 µV) are acceptable for the target application.

Frequently Asked Questions (FAQ)

Q: Can INA126U directly replace AMP04FSZ-RL in all applications?

A: Direct replacement is limited to applications where the reduced output current (10 mA versus 30 mA), lower bandwidth (200 kHz versus 700 kHz), and higher input offset voltage (100 µV versus 30 µV) do not compromise circuit performance. The mechanical footprint and pin configuration are identical, enabling physical substitution. Electrical performance validation is required for each specific application.

Q: What is the difference between INA126U and INA126UA?

A: Both parts are functionally identical instrumentation amplifiers with identical electrical specifications. The primary difference is input offset voltage specification: INA126U is specified at 100 µV maximum, while INA126UA is specified at 150 µV maximum. Both maintain the same operating temperature range (-40°C ~ 85°C) and supply voltage range (2.7 V to 36 V).

Q: What is the difference between INA126U/2K5 and INA126U?

A: These parts are electrically identical. The difference is packaging format: INA126U is supplied in Tube packaging, while INA126U/2K5 is supplied in Cut Tape (CT) & Digi-Reel format. Selection depends on manufacturing assembly requirements and inventory management preferences.

Q: Why does AMP04FSZ-RL have higher supply current (750 µA) than INA126 series (175 µA)?

A: The AMP04FSZ-RL is designed to deliver higher output current capability (30 mA versus 10 mA) and broader bandwidth (700 kHz versus 200 kHz), which inherently requires higher quiescent current consumption. This is a fundamental design trade-off between performance and power efficiency.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The AMP04FSZ-RL and all four INA126 series substitutes (INA126U, INA126U/2K5, INA126UA, INA126UA/2K5) are ROHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory standards.

Q: What is the significance of MSL (Moisture Sensitivity Level) differences?

A: MSL rating indicates maximum shelf-life exposure to moisture before component performance degradation. AMP04FSZ-RL (MSL 1, Unlimited) has no moisture-related shelf-life restrictions. INA126U variants (MSL 3, 168 hours) require controlled storage conditions and have a 168-hour maximum exposure window after packaging opening. INA126UA variants (MSL 2, 1 year) provide intermediate moisture tolerance. For applications with extended storage or high-humidity environments, MSL rating becomes a critical selection criterion.

Q: Can the 8-SOIC package be used interchangeably across all these parts?

A: Yes. All parts use identical 8-SOIC packaging (0.154", 3.90mm Width) with surface mount configuration. PCB footprints and reflow soldering profiles are mechanically compatible. No layout modifications are required for physical substitution.

Q: Which substitute part offers the best overall compatibility with AMP04FSZ-RL?

A: No single substitute part achieves full electrical equivalence with AMP04FSZ-RL. The INA126 series represents a functional alternative with trade-offs in output current, bandwidth, and input offset voltage. Selection must be based on specific application requirements rather than universal compatibility.