LT1817IS#PBF Equivalent & Substitute Parts

Part Overview

The LT1817IS#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 Last Time Buy, indicating discontinued production with limited availability. The LT1817IS#PBF 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 is necessary due to the Last Time Buy status of the LT1817IS#PBF. Alternative components with compatible electrical and mechanical specifications ensure design continuity and long-term supply chain reliability.

Substiute Parts

LT1817IS#PBF

Analog Devices Inc.In Stock: 876LT1817IS#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 LT1817IS#PBF is determined by the following critical parameters:

Functional Compatibility Criteria:

• Amplifier Type: Voltage Feedback architecture
• Number of Circuits: Four independent amplifier channels
• Output Type: Standard or Rail-to-Rail configuration
• Current - Output / Channel: Minimum 80 mA capability

Electrical Performance Criteria:

• Slew Rate: Minimum 250 V/µs
• -3dB Bandwidth: Minimum 180 MHz
• Current - Input Bias: Maximum 2 µA
• Voltage - Input Offset: Maximum 200 µV
• Voltage - Supply Span: Minimum 2.5V to Maximum 11V overlap

Physical and Environmental Criteria:

• Mounting Type: Surface Mount
• Operating Temperature Range: Minimum -40°C coverage
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: MSL 1

The ADA4807-4ARUZ meets all substitution criteria as a voltage feedback amplifier with four circuits, compatible electrical specifications, and equivalent compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The LT1817IS#PBF carries Last Time Buy status, indicating end-of-life production. The ADA4807-4ARUZ maintains Active product status with higher inventory availability (1774 pieces versus 800 pieces), supporting long-term design continuity and supply chain stability.

Compliance and Certification: Both devices maintain ROHS3 compliance, REACH Unaffected status, and identical Moisture Sensitivity Level ratings. Both are classified under ECCN EAR99 and HTSUS 8542.33.0001, ensuring equivalent regulatory and export compliance.

Performance Trade-offs: The ADA4807-4ARUZ exhibits lower slew rate (250 V/µs versus 1500 V/µs) and reduced -3dB bandwidth (180 MHz versus 350 MHz). These reductions are offset by superior input characteristics (lower bias current and offset voltage), significantly reduced supply current consumption (1 mA versus 6.5 mA per four channels), and extended operating temperature range (-40°C to 125°C versus -40°C to 85°C).

Package Consideration: The ADA4807-4ARUZ uses 14-TSSOP packaging versus the 14-SOIC package of the LT1817IS#PBF. While both are 14-pin surface mount packages, the footprint dimensions differ (0.173" versus 0.154" width). PCB layout modification is required for substitution.

Output Type Enhancement: The ADA4807-4ARUZ provides Rail-to-Rail output capability, extending the usable output voltage range compared to the standard output type of the LT1817IS#PBF.

Frequently Asked Questions (FAQ)

Q: Can the ADA4807-4ARUZ directly replace the LT1817IS#PBF without PCB modifications?

A: No. While both devices are 14-pin surface mount amplifiers, the ADA4807-4ARUZ uses 14-TSSOP packaging (0.173" width) whereas the LT1817IS#PBF uses 14-SOIC packaging (0.154" width). PCB footprint redesign is required. Pin-to-pin functional compatibility exists for the four amplifier channels.

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

A: The ADA4807-4ARUZ has lower slew rate (250 V/µs versus 1500 V/µs) and reduced -3dB bandwidth (180 MHz versus 350 MHz). Conversely, the ADA4807-4ARUZ provides superior input offset voltage (140 µV versus 200 µV), lower input bias current (1.2 µA versus 2 µA), and significantly reduced supply current (1 mA versus 6.5 mA for four channels). The ADA4807-4ARUZ also offers Rail-to-Rail output capability.

Q: Is the ADA4807-4ARUZ suitable for high-speed applications requiring 350 MHz bandwidth?

A: No. The ADA4807-4ARUZ -3dB bandwidth is 180 MHz, which is insufficient for applications requiring the 350 MHz bandwidth of the LT1817IS#PBF. Application-specific bandwidth requirements must be evaluated before substitution.

Q: Are there supply voltage compatibility issues between these devices?

A: The ADA4807-4ARUZ minimum supply voltage is 2.7V versus 2.5V for the LT1817IS#PBF. For applications operating at 2.5V to 2.6V, the ADA4807-4ARUZ is not compatible. Both devices support the 11V maximum supply voltage.

Q: Does the ADA4807-4ARUZ support the same operating temperature range?

A: No. The ADA4807-4ARUZ extends the upper operating temperature to 125°C compared to 85°C for the LT1817IS#PBF. Both devices support the -40°C lower temperature limit. Applications requiring operation above 85°C benefit from the ADA4807-4ARUZ extended range.

Q: Are both devices RoHS compliant?

A: Yes. Both the LT1817IS#PBF and ADA4807-4ARUZ are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings, ensuring equivalent environmental and regulatory compliance.

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

A: The primary advantage is product status and supply availability. The ADA4807-4ARUZ is Active with 1774 pieces in stock versus Last Time Buy status for the LT1817IS#PBF with 800 pieces. Secondary advantages include lower power consumption, improved input characteristics, and extended temperature range. Trade-offs include reduced bandwidth and slew rate performance.