LT1815CS8#TRPBF Equivalent & Substitute Parts

Part Overview

The LT1815CS8#TRPBF is a voltage feedback amplifier manufactured by Analog Devices Inc., configured as a single-circuit 8-SO surface mount integrated circuit. This linear amplifier is designed for applications requiring high-speed signal conditioning with a gain bandwidth product of 220 MHz and slew rate of 1500V/µs. The device operates across a supply voltage range of 2.5V to 11V and is rated for 0°C to 70°C operating temperature. The part is currently active in production and ROHS3 compliant. Substitute parts are identified when equivalent functional performance is required due to inventory constraints, design optimization, or extended operating temperature requirements.

Substiute Parts

LT1815CS8#TRPBF

Analog Devices Inc.In Stock: 1034LT1815CS8#TRPBF Datasheet

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OPA820ID

Burr BrownIn Stock: 1442OPA820ID Datasheet

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OPA820IDG4

Texas InstrumentsIn Stock: 951OPA820IDG4 Datasheet

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OPA820IDR

Texas InstrumentsIn Stock: 6093OPA820IDR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LT1815CS8#TRPBF are identified based on functional equivalence within the voltage feedback amplifier category. All substitute parts share the following critical parameters:

• Amplifier Type: Voltage Feedback
• Number of Circuits: 1 circuit per package
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Voltage - Input Offset: 200 µV

The OPA820 series devices (OPA820ID, OPA820IDG4, OPA820IDR) are functionally equivalent alternatives. These parts operate within compatible supply voltage ranges and maintain the same input offset voltage specification. All substitute parts are ROHS3 compliant and carry the same ECCN and HTSUS classifications as the primary part.

Substitution is valid when the application requirements accommodate the electrical parameter differences documented in the Parameter Comparison table below.

Parameter Comparison

Engineering Selection Recommendations

LT1815CS8#TRPBF (Primary Part)

The LT1815CS8#TRPBF remains the preferred selection for applications operating within the 0°C to 70°C temperature range and requiring the specified slew rate of 1500V/µs. This part is active in production with 1017 units in stock. ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) support standard manufacturing and storage conditions.

OPA820IDR (Recommended Substitute)

The OPA820IDR is the primary substitute option. This part is active in production with 6062 units in stock, providing superior availability. It is ROHS3 compliant and carries MSL 2 (1 Year) moisture sensitivity. The OPA820IDR operates across an extended temperature range of -40°C to 85°C, accommodating applications requiring broader environmental performance. The higher -3dB bandwidth (800 MHz) and gain bandwidth product (280 MHz) provide enhanced frequency response characteristics. The minimum supply voltage requirement increases to 5V, which must be verified against circuit design specifications.

OPA820ID (Alternative Substitute)

The OPA820ID is functionally equivalent to the OPA820IDR with identical electrical specifications. This part is active in production with 1355 units in stock. Packaging is specified as tape and reel format. The same supply voltage and temperature range considerations apply.

OPA820IDG4 (Limited Availability)

The OPA820IDG4 is discontinued at DiGi Electronics and carries MSL 2 (1 Year) moisture sensitivity. While electrically equivalent to other OPA820 variants, the discontinued status limits its suitability for new designs or long-term production requirements. This part is available with 934 units in stock but should not be selected for applications requiring sustained component availability.

Frequently Asked Questions (FAQ)

Q: Can the OPA820 series parts directly replace the LT1815CS8#TRPBF without circuit modifications?

A: Direct pin-compatible replacement is supported due to identical 8-SOIC packaging. However, circuit design verification is required for applications sensitive to the following parameter differences: minimum supply voltage (5V for OPA820 versus 2.5V for LT1815), slew rate (240V/µs versus 1500V/µs), and input bias current (9µA versus 2µA). Applications operating below 5V supply voltage cannot use OPA820 substitutes.

Q: What are the key electrical differences between the LT1815CS8#TRPBF and OPA820 substitutes?

A: The LT1815CS8#TRPBF provides higher slew rate (1500V/µs) and lower input bias current (2µA). The OPA820 series offers higher -3dB bandwidth (800 MHz), higher gain bandwidth product (280 MHz), and extended operating temperature range (-40°C to 85°C). Both maintain identical input offset voltage (200µV) and package form factor.

Q: Are all substitute parts ROHS3 compliant?

A: The OPA820IDG4 and OPA820IDR are ROHS3 compliant. The OPA820ID does not specify RoHS status in the provided data. Compliance verification is required for applications with mandatory ROHS3 requirements.

Q: What is the impact of the different moisture sensitivity levels?

A: The LT1815CS8#TRPBF carries MSL 1 (Unlimited), allowing indefinite storage without baking. The OPA820IDG4 and OPA820IDR carry MSL 2 (1 Year), requiring component baking if storage exceeds one year or if moisture absorption is suspected. Standard manufacturing processes accommodate MSL 2 components without additional handling procedures.

Q: Which substitute part offers the best availability?

A: The OPA820IDR provides the highest inventory level with 6062 units in stock and active production status. This part is recommended for applications requiring sustained component availability and long-term production support.

Q: Can the OPA820 series be used in applications requiring operation below 5V supply voltage?

A: No. The OPA820 series minimum supply voltage is 5V, while the LT1815CS8#TRPBF operates down to 2.5V. Applications with supply voltages between 2.5V and 5V require the LT1815CS8#TRPBF or alternative parts with lower minimum supply voltage specifications.

Q: What is the significance of the extended temperature range in OPA820 substitutes?

A: The OPA820 series operates from -40°C to 85°C, compared to 0°C to 70°C for the LT1815CS8#TRPBF. This extended range supports applications in industrial, automotive, or temperature-extreme environments. Applications limited to 0°C to 70°C operation do not require this extended capability.