LT1920CS8#TRPBF Equivalent & Substitute Parts

Part Overview

The LT1920CS8#TRPBF is an instrumentation amplifier manufactured by Analog Devices Inc., designed for precision signal conditioning applications. This single-circuit, 8-SO surface mount device operates across a wide supply voltage range of 4.6 V to 36 V and is classified as an Active product with ROHS3 compliance. Equivalent and substitute parts are identified based on matching functional category, package type, electrical performance parameters, and compliance certifications to ensure direct interchangeability in circuit designs.

Substiute Parts

LT1920CS8#TRPBF

Analog Devices Inc.In Stock: 2110LT1920CS8#TRPBF Datasheet

Current PartRFQ

INA128HD

Texas InstrumentsIn Stock: 2799INA128HD Datasheet

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INA129MDREP

Texas InstrumentsIn Stock: 4269INA129MDREP Datasheet

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INA141UA

Burr BrownIn Stock: 1556INA141UA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LT1920CS8#TRPBF is determined by the following criteria:

Primary Matching Criteria:

• Amplifier Type: Instrumentation
• Number of Circuits: 1
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Voltage - Supply Span: Minimum 4.6 V, Maximum 36 V
• RoHS Status: ROHS3 Compliant

Secondary Performance Parameters:

• Slew Rate: 1.2 V/µs or greater
• Gain Bandwidth Product: 1 MHz or greater
• Current - Input Bias: 500 pA or lower
• Voltage - Input Offset: 30 µV or lower
• Current - Supply: 900 µA or lower
• Current - Output / Channel: 27 mA or greater

The identified substitute parts meet the primary matching criteria and maintain electrical performance within acceptable operational boundaries for direct circuit replacement.

Parameter Comparison

Engineering Selection Recommendations

INA128HD (Texas Instruments)

The INA128HD is a direct functional equivalent with identical package and mounting specifications. This device provides superior slew rate performance (4 V/µs versus 1.2 V/µs) and lower input bias current (2 nA versus 500 pA). The extended operating temperature range (-55°C to 175°C) accommodates broader environmental conditions. MSL rating of 3 requires adherence to moisture control protocols during storage and handling. ROHS3 compliance and REACH unaffected status align with regulatory requirements.

INA129MDREP (Texas Instruments)

The INA129MDREP offers equivalent package and mounting characteristics with enhanced slew rate (4 V/µs) and reduced input bias current (2 nA). The operating temperature range extends to -55°C to 125°C. Input offset voltage specification of 100 µV exceeds the LT1920CS8#TRPBF baseline of 30 µV and requires evaluation for precision-critical applications. MSL rating of 3 applies. ROHS3 compliance and REACH unaffected status are maintained.

INA141UA (Burr Brown)

The INA141UA provides matching package and mounting specifications with superior slew rate (4 V/µs) and lower input offset voltage (20 µV). The operating temperature range of -40°C to 85°C covers standard industrial conditions. Input bias current of 2 nA represents significant improvement over the LT1920CS8#TRPBF. ROHS3 compliance and REACH unaffected status are confirmed.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: What determines if a part can substitute for the LT1920CS8#TRPBF?

A: Substitution is based on matching instrumentation amplifier type, single-circuit configuration, 8-SOIC package format, surface mount mounting type, and supply voltage range of 4.5 V to 36 V minimum. All substitute parts must maintain ROHS3 compliance and REACH unaffected status.

Q: Are the substitute parts pin-compatible with the LT1920CS8#TRPBF?

A: Yes. All substitute parts use the 8-SOIC (0.154", 3.90mm Width) package format, ensuring identical pinout and PCB footprint compatibility.

Q: How do the electrical performance characteristics differ between the main part and substitutes?

A: The INA128HD, INA129MDREP, and INA141UA provide higher slew rates (4 V/µs versus 1.2 V/µs) and lower input bias currents (2 nA versus 500 pA). Input offset voltage specifications vary: INA141UA at 20 µV, INA128HD at 25 µV, and INA129MDREP at 100 µV. These differences affect precision and dynamic response characteristics in specific applications.

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

A: The LT1920CS8#TRPBF carries MSL 1 (Unlimited), indicating no moisture sensitivity constraints. Substitute parts INA128HD and INA129MDREP carry MSL 3 (168 Hours), requiring storage in controlled humidity environments and limiting shelf life after moisture exposure. INA141UA MSL rating is not specified in available data.

Q: Can substitute parts operate across the full temperature range of the LT1920CS8#TRPBF?

A: The LT1920CS8#TRPBF operates from 0°C to 70°C. All substitute parts exceed this range: INA128HD extends to -55°C to 175°C, INA129MDREP to -55°C to 125°C, and INA141UA to -40°C to 85°C. Substitution is valid within the original part's specified temperature window.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts carry ROHS3 compliance certification, matching the regulatory status of the LT1920CS8#TRPBF.

Q: What is the impact of lower current output specifications in substitute parts?

A: The LT1920CS8#TRPBF provides 27 mA output current per channel, while substitute parts provide 15 mA. Applications requiring higher output drive capability must evaluate load impedance and signal conditioning requirements to confirm adequacy of the reduced output current specification.