MAX478CSA-T Equivalent & Substitute Parts

Part Overview

The MAX478CSA-T is a general purpose operational amplifier featuring two circuits in an 8-SOIC surface mount package, manufactured by Analog Devices Inc./Maxim Integrated. This device is classified as obsolete, which necessitates identification of active equivalent alternatives for new designs and production continuity. The MAX478CSA-T operates across a wide supply voltage range of 3V to 30V with low input bias current and moderate slew rate characteristics suitable for general signal conditioning applications.

Substiute Parts

MAX478CSA-T

Analog Devices Inc./Maxim IntegratedIn Stock: 774MAX478CSA-T Datasheet

Current PartRFQ

LT1178S8#PBF

Analog Devices Inc.In Stock: 1201LT1178S8#PBF Datasheet

DirectRFQ

LT1178S8#TRPBF

Analog Devices Inc.In Stock: 865LT1178S8#TRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX478CSA-T is determined by strict equivalence across the following critical parameters:

Functional Equivalence Criteria:

• Amplifier Type: General Purpose
• Number of Circuits: 2
• Slew Rate: 0.04 V/µs
• Gain Bandwidth Product: 85 kHz
• Current - Input Bias: 3 nA
• Operating Temperature Range: 0°C to 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)

Supply Voltage Compatibility: The MAX478CSA-T operates from 3V to 30V. Substitute parts must support this range or a subset thereof that includes the intended application voltage.

Identified Substitutes: The LT1178S8#PBF and LT1178S8#TRPBF (Analog Devices Inc., LT® series) meet the functional equivalence criteria. Both are active products with identical electrical performance specifications and package geometry. The primary distinction between these substitutes is packaging format: tube packaging (LT1178S8#PBF) versus tape and reel format (LT1178S8#TRPBF).

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The MAX478CSA-T is classified as obsolete. The LT1178S8#PBF and LT1178S8#TRPBF are active products from Analog Devices Inc., ensuring continued availability and manufacturing support for new designs and production requirements.

Compliance and Certification: Both substitute parts are ROHS3 compliant, whereas the MAX478CSA-T is RoHS non-compliant. Applications subject to RoHS directives or customer specifications requiring RoHS compliance must use the LT1178 series alternatives.

Parameter Deviations: The LT1178S8 variants exhibit the following differences from the MAX478CSA-T:

• Voltage - Input Offset: 120 µV (versus 50 µV for MAX478CSA-T)
• Current - Supply: 17 µA per channel (versus 13 µA for MAX478CSA-T)
• Voltage - Supply Span (Min): 5V (versus 3V for MAX478CSA-T)

These deviations are within acceptable tolerances for general purpose amplifier applications. Applications requiring the lower input offset voltage or minimum 3V supply operation must evaluate circuit-level impact.

Packaging Format Selection: LT1178S8#PBF (tube packaging) is suitable for lower-volume production and manual assembly operations. LT1178S8#TRPBF (tape and reel format) is specified for automated pick-and-place assembly and high-volume manufacturing.

Frequently Asked Questions (FAQ)

Q: Can the LT1178S8 series directly replace the MAX478CSA-T in existing designs?

A: The LT1178S8 series is functionally equivalent for general purpose amplifier applications. Pin-for-pin compatibility exists due to identical 8-SOIC package geometry. However, the higher input offset voltage (120 µV versus 50 µV) and higher supply current (17 µA versus 13 µA) must be evaluated within the specific circuit context. The minimum supply voltage requirement of 5V (versus 3V) must be confirmed against the application's power supply design.

Q: What is the difference between LT1178S8#PBF and LT1178S8#TRPBF?

A: Both parts are electrically identical. The difference is packaging format. LT1178S8#PBF is supplied in tube packaging, suitable for manual handling and lower-volume assembly. LT1178S8#TRPBF is supplied in tape and reel format, optimized for automated assembly equipment and high-volume production environments.

Q: Are the LT1178S8 variants RoHS compliant?

A: Yes, both LT1178S8#PBF and LT1178S8#TRPBF are ROHS3 compliant. The original MAX478CSA-T is RoHS non-compliant. Applications requiring RoHS compliance must transition to the LT1178 series.

Q: What is the impact of the 5V minimum supply voltage on the LT1178S8?

A: The LT1178S8 requires a minimum supply voltage of 5V, whereas the MAX478CSA-T operates from 3V. Applications powered by 3V or 4V supplies cannot use the LT1178S8 without circuit redesign. Confirm the application's supply voltage before substitution.

Q: Are there any thermal or reliability differences between these parts?

A: Both the MAX478CSA-T and LT1178S8 series operate across the same temperature range (0°C to 70°C) and share identical moisture sensitivity levels (MSL 1, Unlimited). No thermal or reliability differences are specified in the provided parameters.

Q: Which substitute should be selected for new production designs?

A: For new designs, LT1178S8#TRPBF is recommended due to its active product status, ROHS3 compliance, and tape and reel packaging format optimized for modern manufacturing processes. LT1178S8#PBF is suitable where tube packaging is preferred or required by assembly operations.