LT1817IGN#PBF Equivalent & Substitute Parts

Part Overview

The LT1817IGN#PBF is a voltage feedback operational amplifier containing four independent circuits in a 16-SSOP surface mount package, manufactured by Analog Devices Inc. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The LT1817IGN#PBF operates across a supply voltage range of 2.5V to 11V and is designed 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 LT1817IGN#PBF. Alternative components with compatible electrical and mechanical specifications ensure design continuity and long-term supply chain reliability.

Key Parameters

Parameter	LT1817IGN#PBF
Amplifier Type	Voltage Feedback
Number of Circuits	4
Slew Rate	1500 V/µs
Gain Bandwidth Product	220 MHz
-3dB Bandwidth	350 MHz
Current - Input Bias	2 µA
Voltage - Input Offset	200 µV
Current - Supply	6.5 mA (x4 Channels)
Current - Output / Channel	80 mA
Voltage - Supply Span (Min)	2.5 V
Voltage - Supply Span (Max)	11 V
Operating Temperature	-40°C to 85°C
Package / Case	16-SSOP (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LT1817IGN#PBF is determined by the following critical parameters:

Functional Compatibility Criteria:

Amplifier Type: Voltage Feedback topology
Number of Circuits: Four independent operational amplifier circuits
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
RoHS3 Compliance: Required
Moisture Sensitivity Level: MSL 1 (Unlimited)

The ADA4807-4ARUZ meets these substitution criteria with compatible electrical specifications and regulatory compliance.

Parameter Comparison

Parameter	LT1817IGN#PBF	ADA4807-4ARUZ	Compatibility Notes
Amplifier Type	Voltage Feedback	Voltage Feedback	Identical topology
Number of Circuits	4	4	Identical circuit count
Output Type	Standard	Rail-to-Rail	Substitute offers enhanced output swing capability
Slew Rate	1500 V/µs	250 V/µs	Substitute has lower slew rate; suitable for lower frequency applications
-3dB Bandwidth	350 MHz	180 MHz	Substitute has reduced bandwidth; acceptable for moderate bandwidth requirements
Current - Input Bias	2 µA	1.2 µA	Substitute offers superior input bias current performance
Voltage - Input Offset	200 µV	140 µV	Substitute offers superior input offset voltage performance
Current - Supply	6.5 mA (x4 Channels)	1 mA (x4 Channels)	Substitute has significantly lower supply current
Current - Output / Channel	80 mA	80 mA	Identical output current capability
Voltage - Supply Span (Min)	2.5 V	2.7 V	Substitute requires slightly higher minimum supply voltage
Voltage - Supply Span (Max)	11 V	11 V	Identical maximum supply voltage
Operating Temperature	-40°C to 85°C	-40°C to 125°C	Substitute offers extended upper temperature rating
Package / Case	16-SSOP (0.154", 3.90mm Width)	14-TSSOP (0.173", 4.40mm Width)	Different package footprints; PCB layout modification required
Mounting Type	Surface Mount	Surface Mount	Identical mounting technology
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical compliance status
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Identical moisture sensitivity rating

Engineering Selection Recommendations

Product Status Consideration: The LT1817IGN#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 707 pieces), providing superior long-term supply chain security.

Regulatory and Compliance Alignment: Both components maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, ensuring equivalent environmental and regulatory standing. Both components carry EAR99 ECCN classification and are REACH Unaffected, maintaining identical export and regulatory compliance profiles.

Electrical Performance Trade-offs: The ADA4807-4ARUZ exhibits reduced slew rate (250 V/µs versus 1500 V/µs) and reduced -3dB bandwidth (180 MHz versus 350 MHz). These reductions are acceptable for applications not requiring the maximum performance specifications of the LT1817IGN#PBF. The substitute offers superior input bias current (1.2 µA versus 2 µA) and input offset voltage (140 µV versus 200 µV) performance, along with significantly reduced supply current consumption (1 mA versus 6.5 mA per channel).

Physical Integration Requirements: Package footprint differences necessitate PCB layout modification. The ADA4807-4ARUZ uses 14-TSSOP packaging (0.173", 4.40mm width) compared to the LT1817IGN#PBF 16-SSOP packaging (0.154", 3.90mm width). Pin count reduction from 16 to 14 requires schematic and layout redesign.

Temperature Operating Range: The ADA4807-4ARUZ extends the upper operating temperature limit to 125°C, providing enhanced thermal margin for applications operating in elevated temperature environments.

Frequently Asked Questions (FAQ)

Q: Can the ADA4807-4ARUZ directly replace the LT1817IGN#PBF without PCB modification?

A: No. The ADA4807-4ARUZ uses a 14-TSSOP package with different pin configuration compared to the LT1817IGN#PBF 16-SSOP package. PCB layout and schematic redesign are required for implementation.

Q: What are the primary electrical differences between these components?

A: The ADA4807-4ARUZ provides lower slew rate (250 V/µs versus 1500 V/µs) and reduced -3dB bandwidth (180 MHz versus 350 MHz). Conversely, the ADA4807-4ARUZ offers superior input bias current, lower input offset voltage, and significantly reduced supply current consumption. The ADA4807-4ARUZ also features Rail-to-Rail output capability.

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

A: No. The ADA4807-4ARUZ -3dB bandwidth of 180 MHz is insufficient for applications requiring the full 350 MHz bandwidth of the LT1817IGN#PBF. Application-specific bandwidth requirements must be evaluated before substitution.

Q: What is the minimum supply voltage requirement for the ADA4807-4ARUZ?

A: The ADA4807-4ARUZ requires a minimum supply voltage of 2.7V, compared to 2.5V for the LT1817IGN#PBF. Designs operating at 2.5V supply voltage require verification of ADA4807-4ARUZ operation at the specified supply voltage.

Q: Are both components compliant with current environmental and regulatory standards?

A: Yes. Both the LT1817IGN#PBF and ADA4807-4ARUZ maintain ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity rating, REACH Unaffected status, and EAR99 ECCN classification.

Q: What is the supply current advantage of the ADA4807-4ARUZ?

A: The ADA4807-4ARUZ consumes 1 mA per channel (4 mA total for four channels) compared to 6.5 mA per channel (26 mA total) for the LT1817IGN#PBF. This represents an 85% reduction in total supply current consumption, providing significant power efficiency benefits in battery-powered or thermally constrained applications.

Q: Does the ADA4807-4ARUZ support the same output current capability?

A: Yes. Both components provide 80 mA output current per channel, maintaining identical output drive capability.

Q: What is the extended temperature rating benefit of the ADA4807-4ARUZ?

A: The ADA4807-4ARUZ operates to 125°C maximum, compared to 85°C for the LT1817IGN#PBF. This 40°C extended upper temperature rating accommodates applications in elevated ambient temperature environments or high-power dissipation scenarios.

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