LT1817CS#PBF Equivalent & Substitute Parts

Part Overview

The LT1817CS#PBF is a voltage feedback amplifier integrated circuit manufactured by Analog Devices Inc., containing four independent amplifier circuits in a 14-SOIC surface mount package. This device is classified as a Last Time Buy product, indicating that it is no longer in active production and existing inventory represents the final availability from the manufacturer.

The LT1817CS#PBF operates across a supply voltage range of 2.5 V to 11 V with an operating temperature range of 0°C to 70°C. The device delivers a slew rate of 1500 V/µs and a gain bandwidth product of 220 MHz, making it suitable for applications requiring moderate-speed signal conditioning and amplification.

Due to the Last Time Buy status of the LT1817CS#PBF, identification of equivalent substitute parts is necessary for design continuity, long-term product support, and procurement planning. Substitute parts must maintain functional compatibility while meeting the electrical and mechanical requirements of the original design.

Substiute Parts

LT1817CS#PBF

Analog Devices Inc.In Stock: 1050LT1817CS#PBF Datasheet

Current PartRFQ

ADA4807-4ARUZ

Analog Devices Inc.In Stock: 1840ADA4807-4ARUZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Functional Requirements:

• Amplifier Type: Voltage Feedback
• Number of Circuits: 4 independent amplifier channels
• Output Type: Standard output configuration
• Supply Voltage Range: Minimum 2.5 V, Maximum 11 V
• Output Current per Channel: 80 mA

Performance Characteristics:

• Slew Rate: 1500 V/µs (primary performance metric)
• Gain Bandwidth Product: 220 MHz
• -3dB Bandwidth: 350 MHz
• Input Bias Current: 2 µA
• Input Offset Voltage: 200 µV
• Supply Current: 6.5 mA (x4 Channels)

Physical and Environmental Requirements:

• Mounting Type: Surface Mount
• Package Type: 14-pin SOIC or compatible 14-pin surface mount package
• Operating Temperature Range: 0°C to 70°C
• RoHS3 Compliance
• MSL Level 1 (Unlimited moisture sensitivity)

Substitute parts must satisfy the voltage feedback amplifier topology, maintain four independent circuits, support the specified supply voltage range, and deliver equivalent or superior performance in slew rate, bandwidth, and input characteristics. Package compatibility requires either identical 14-SOIC packaging or alternative 14-pin surface mount packages suitable for direct board-level substitution.

Parameter Comparison

Engineering Selection Recommendations

ADA4807-4ARUZ as Primary Substitute:

The ADA4807-4ARUZ is the manufacturer-recommended substitute for the LT1817CS#PBF. Both devices are produced by Analog Devices Inc. and share the core voltage feedback amplifier topology with four independent circuits.

Compliance and Availability:

The ADA4807-4ARUZ maintains Active product status with 1774 units in current inventory, ensuring long-term availability and continued manufacturer support. Both the LT1817CS#PBF and ADA4807-4ARUZ are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for electronic component procurement.

Performance Characteristics:

The ADA4807-4ARUZ delivers superior input characteristics with lower input bias current (1.2 µA versus 2 µA) and reduced input offset voltage (140 µV versus 200 µV). The substitute device incorporates rail-to-rail output capability, extending the usable output voltage range compared to the standard output configuration of the LT1817CS#PBF.

Trade-offs in Substitution:

The ADA4807-4ARUZ operates at a reduced slew rate of 250 V/µs compared to the LT1817CS#PBF slew rate of 1500 V/µs, and the -3dB bandwidth is 180 MHz versus 350 MHz. These performance reductions are offset by significantly lower supply current consumption (1 mA versus 6.5 mA across four channels), resulting in reduced power dissipation and thermal load.

Package Considerations:

The ADA4807-4ARUZ uses a 14-TSSOP package (0.173", 4.40mm width) compared to the 14-SOIC package (0.154", 3.90mm width) of the LT1817CS#PBF. Both packages are 14-pin surface mount configurations with compatible pinouts, but board layout modifications may be required to accommodate the different package footprint dimensions.

Operating Temperature Range:

The ADA4807-4ARUZ supports an extended operating temperature range of -40°C to 125°C, compared to the LT1817CS#PBF range of 0°C to 70°C. This extended range provides additional design flexibility for applications requiring operation outside the original temperature specifications.

Frequently Asked Questions (FAQ)

Q: Can the ADA4807-4ARUZ be used as a direct replacement for the LT1817CS#PBF without circuit modifications?

A: The ADA4807-4ARUZ is functionally compatible as a voltage feedback amplifier with four circuits and equivalent output current capability. However, the different package footprint (14-TSSOP versus 14-SOIC) requires PCB layout changes. The reduced slew rate and bandwidth may affect circuit performance in applications requiring the original high-speed characteristics. Circuit validation is necessary to confirm suitability for specific applications.

Q: What are the key differences in electrical performance between these two devices?

A: The primary performance differences are slew rate (1500 V/µs for LT1817CS#PBF versus 250 V/µs for ADA4807-4ARUZ) and -3dB bandwidth (350 MHz versus 180 MHz). The ADA4807-4ARUZ provides superior input characteristics with lower bias current and offset voltage, and includes rail-to-rail output capability. Supply current consumption is significantly lower in the ADA4807-4ARUZ (1 mA versus 6.5 mA).

Q: Is the ADA4807-4ARUZ suitable for high-speed signal conditioning applications?

A: The ADA4807-4ARUZ operates at reduced slew rate and bandwidth compared to the LT1817CS#PBF. Applications requiring slew rates exceeding 250 V/µs or bandwidth exceeding 180 MHz should evaluate whether the substitute device meets performance requirements. The lower supply current and improved input offset characteristics make the ADA4807-4ARUZ suitable for precision, low-power applications.

Q: What is the impact of the different package types on board design?

A: The LT1817CS#PBF uses a 14-SOIC package with 3.90mm width, while the ADA4807-4ARUZ uses a 14-TSSOP package with 4.40mm width. Both are 14-pin surface mount packages with compatible pinouts, but the different footprint dimensions require PCB layout modifications. Trace routing, component spacing, and thermal management considerations may differ between the two packages.

Q: Are both devices compliant with current regulatory standards?

A: Both the LT1817CS#PBF and ADA4807-4ARUZ are ROHS3 compliant and REACH unaffected. Both devices carry MSL Level 1 (Unlimited) moisture sensitivity classification. These regulatory statuses are equivalent and suitable for applications requiring compliance with current environmental and hazardous substance restrictions.

Q: What is the significance of the Last Time Buy status for the LT1817CS#PBF?

A: Last Time Buy status indicates that the LT1817CS#PBF is no longer in active production and the existing inventory of 966 units represents the final availability from Analog Devices Inc. Once this inventory is depleted, the device will no longer be available for procurement. The ADA4807-4ARUZ, with Active product status and 1774 units in inventory, provides a path for continued design support and long-term component availability.

Q: Can the ADA4807-4ARUZ operate across the full supply voltage range of the LT1817CS#PBF?

A: The ADA4807-4ARUZ supports a supply voltage range of 2.7 V to 11 V, compared to the LT1817CS#PBF range of 2.5 V to 11 V. The minimum supply voltage for the substitute is 0.2 V higher. Applications operating at supply voltages below 2.7 V require confirmation that the ADA4807-4ARUZ meets minimum voltage requirements.

Q: What are the advantages of the rail-to-rail output capability in the ADA4807-4ARUZ?

A: Rail-to-rail output capability in the ADA4807-4ARUZ allows the output signal to swing closer to the positive and negative supply rails compared to the standard output configuration of the LT1817CS#PBF. This feature increases the usable output voltage range and is beneficial for applications requiring maximum dynamic range or operation with low supply voltages.