LT1817CS#TRPBF Equivalent & Substitute Parts

Part Overview

The LT1817CS#TRPBF is a voltage feedback amplifier integrated circuit manufactured by Analog Devices Inc., containing four independent amplifier circuits in a 14-SO surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The LT1817CS#TRPBF operates across a supply voltage range of 2.5V to 11V and is suitable for applications requiring moderate bandwidth and slew rate performance in compact form factors.

Identification of equivalent and substitute parts becomes necessary due to the Last Time Buy status of the LT1817CS#TRPBF. Substitute components must maintain functional compatibility while meeting the electrical and mechanical requirements of the original design.

Substiute Parts

LT1817CS#TRPBF

Analog Devices Inc.In Stock: 782LT1817CS#TRPBF Datasheet

Current PartRFQ

ADA4807-4ARUZ-R7

Analog Devices Inc.In Stock: 1777ADA4807-4ARUZ-R7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LT1817CS#TRPBF is determined by the following critical parameters:

Functional Requirements:

• Amplifier topology: Voltage feedback configuration
• Circuit count: Four independent amplifier circuits
• Output drive capability: 80 mA per channel minimum
• Supply voltage compatibility: Operating range overlap with 2.5V to 11V

Electrical Performance Criteria:

• Input bias current tolerance
• Input offset voltage specifications
• Slew rate and bandwidth characteristics
• Supply current consumption

Physical and Environmental Constraints:

• Surface mount package compatibility
• Operating temperature range requirements
• RoHS3 compliance and MSL rating

The ADA4807-4ARUZ-R7 qualifies as a substitute based on matching the four-circuit voltage feedback amplifier topology, surface mount configuration, and compliance certifications. Package form factor differs (14-TSSOP versus 14-SOIC), requiring PCB layout modification. Electrical performance parameters show variations in slew rate, bandwidth, and supply current that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The LT1817CS#TRPBF carries Last Time Buy status, indicating end-of-life production. The ADA4807-4ARUZ-R7 maintains Active product status with higher inventory availability (1700 pieces in stock versus 729 pieces), supporting long-term supply chain continuity.

Compliance and Certification: Both components achieve ROHS3 compliance and carry MSL Level 1 (Unlimited) moisture sensitivity ratings, meeting equivalent environmental and regulatory requirements. Both components are classified under identical HTSUS and ECCN codes.

Electrical Performance Trade-offs: Selection between these components depends on application-specific performance requirements:

• Applications requiring high slew rate (>1000 V/µs) and wide bandwidth (>300 MHz) necessitate retention of the LT1817CS#TRPBF or identification of alternative high-speed amplifiers.
• Applications tolerant of moderate slew rate (250 V/µs) and bandwidth (180 MHz) benefit from ADA4807-4ARUZ-R7 substitution, which offers superior input offset voltage, lower input bias current, and significantly reduced supply current consumption.

Package Compatibility: The 14-SOIC and 14-TSSOP packages differ in footprint dimensions (0.154" versus 0.173" width). PCB layout modification is required for ADA4807-4ARUZ-R7 substitution. Pin-to-pin compatibility exists for functional signal routing.

Supply Voltage Compatibility: The ADA4807-4ARUZ-R7 minimum supply voltage of 2.7V is 0.2V higher than the LT1817CS#TRPBF minimum of 2.5V. Applications operating at 2.5V to 2.6V supply voltage cannot use the ADA4807-4ARUZ-R7 substitute.

Frequently Asked Questions (FAQ)

Q: Can the ADA4807-4ARUZ-R7 directly replace the LT1817CS#TRPBF without circuit modification?

A: Pin-to-pin functional compatibility exists for the four amplifier circuits. However, package footprint differences (14-SOIC versus 14-TSSOP) require PCB layout redesign. Electrical performance differences in slew rate and bandwidth may necessitate circuit parameter adjustment depending on application requirements.

Q: What is the primary advantage of substituting to the ADA4807-4ARUZ-R7?

A: The ADA4807-4ARUZ-R7 offers significantly reduced supply current consumption (1 mA versus 6.5 mA for four channels), lower input offset voltage (140 µV versus 200 µV), and lower input bias current (1.2 µA versus 2 µA). The device maintains Active product status with higher inventory availability.

Q: Are there applications where the LT1817CS#TRPBF cannot be substituted?

A: Applications requiring slew rates exceeding 250 V/µs or bandwidth exceeding 180 MHz cannot use the ADA4807-4ARUZ-R7. Applications operating at supply voltages below 2.7V cannot use the ADA4807-4ARUZ-R7 due to its higher minimum supply voltage specification.

Q: What is the operating temperature range difference between these components?

A: The LT1817CS#TRPBF operates from 0°C to 70°C, while the ADA4807-4ARUZ-R7 operates from -40°C to 125°C. Applications requiring operation below 0°C or above 70°C must use the ADA4807-4ARUZ-R7 or identify alternative components.

Q: Do both components meet the same regulatory and compliance standards?

A: Both components are ROHS3 compliant, carry MSL Level 1 ratings, and share identical HTSUS and ECCN classifications. Compliance requirements are equivalent between the two devices.

Q: What packaging considerations apply to the ADA4807-4ARUZ-R7 substitution?

A: The ADA4807-4ARUZ-R7 uses 14-TSSOP packaging (0.173" width) compared to the LT1817CS#TRPBF 14-SOIC packaging (0.154" width). The TSSOP package has a smaller pitch and different land pattern, requiring complete PCB footprint redesign. Reflow soldering parameters may differ between package types.

Q: Can the ADA4807-4ARUZ-R7 supply the same output current as the LT1817CS#TRPBF?

A: Both components provide 80 mA output current per channel, meeting identical output drive specifications.

Q: What is the significance of the rail-to-rail output specification on the ADA4807-4ARUZ-R7?

A: Rail-to-rail output capability allows the ADA4807-4ARUZ-R7 to swing closer to the positive and negative supply rails compared to the standard output type of the LT1817CS#TRPBF. This provides greater output voltage swing range in low-supply-voltage applications.