LMH6640MFX Equivalent & Substitute Parts

Part Overview

The LMH6640MFX is a voltage feedback operational amplifier manufactured by Texas Instruments, designed for single-circuit rail-to-rail applications in SOT-23-5 surface mount packaging. This device is classified as obsolete, necessitating identification of active alternative components for new designs and production continuity. The LMH6640MFX operates across a 4.5 V to 16 V supply range with a slew rate of 170 V/µs and gain bandwidth product of 62 MHz, serving high-speed signal conditioning applications.

Substiute Parts

LMH6640MFX

Texas InstrumentsIn Stock: 8475LMH6640MFX Datasheet

Current PartRFQ

LT6003HS5#TRMPBF

Analog Devices Inc.In Stock: 3893LT6003HS5#TRMPBF Datasheet

MFR RecommendedRFQ

LT6003HS5#TRPBF

Analog Devices Inc.In Stock: 4206LT6003HS5#TRPBF Datasheet

MFR RecommendedRFQ

MCP6H01T-E/OT

Microchip TechnologyIn Stock: 2081MCP6H01T-E/OT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LMH6640MFX is determined by the following critical parameters:

Mechanical Compatibility:

• Single circuit operational amplifier configuration
• Rail-to-rail output capability
• SOT-23-5 surface mount package (SC-74A, SOT-753 equivalent)
• Moisture sensitivity level MSL 1 (unlimited)

Electrical Compatibility:

• Supply voltage range overlap: minimum 4.5 V to maximum 16 V
• Operating temperature range: -40°C to 85°C minimum
• Single-channel amplifier topology

The substitute parts identified (LT6003HS5#TRMPBF, LT6003HS5#TRPBF, and MCP6H01T-E/OT) satisfy mechanical packaging requirements and supply voltage specifications. These devices are classified as general-purpose amplifiers with active product status, ensuring long-term availability and manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

LT6003HS5#TRMPBF and LT6003HS5#TRPBF (Analog Devices Inc.)

These devices provide mechanical and electrical compatibility with the LMH6640MFX within the specified supply voltage range (1.6 V to 16 V). Both variants are active products with ROHS3 compliance and extended operating temperature range (-40°C to 125°C). The primary distinction between these two part numbers is packaging format: LT6003HS5#TRMPBF is supplied in Cut Tape with Digi-Reel, while LT6003HS5#TRPBF is supplied in Tape & Reel format. Selection between these variants depends on procurement and assembly requirements.

MCP6H01T-E/OT (Microchip Technology)

This device offers direct package compatibility (SC-74A, SOT-753) with the LMH6640MFX and operates within the specified supply voltage range (3.5 V to 16 V). The MCP6H01T-E/OT is an active product with ROHS3 compliance and extended operating temperature range (-40°C to 125°C). This part is suitable for applications where the minimum supply voltage requirement of 3.5 V is acceptable.

All three substitute parts are active products with current manufacturing support and regulatory compliance certifications, ensuring design continuity and long-term component availability.

Frequently Asked Questions (FAQ)

Q: Can the LT6003HS5 series directly replace the LMH6640MFX in existing designs?

A: The LT6003HS5 series provides mechanical compatibility (SOT-23-5 package) and operates within the LMH6640MFX supply voltage range. However, electrical performance differs significantly. The LT6003HS5 exhibits lower slew rate (0.0013 V/µs versus 170 V/µs) and lower gain bandwidth product (3 kHz versus 62 MHz). Circuit redesign and performance validation are required for applications dependent on high-speed characteristics.

Q: What is the difference between LT6003HS5#TRMPBF and LT6003HS5#TRPBF?

A: Both part numbers are identical devices from Analog Devices Inc. The difference is packaging format. LT6003HS5#TRMPBF is supplied in Cut Tape with Digi-Reel packaging, while LT6003HS5#TRPBF is supplied in standard Tape & Reel format. Electrical and functional specifications are identical.

Q: Is the MCP6H01T-E/OT suitable for applications requiring 4.5 V minimum supply voltage?

A: The MCP6H01T-E/OT operates with a minimum supply voltage of 3.5 V, which is below the LMH6640MFX minimum of 4.5 V. This device is suitable for applications operating at 4.5 V and above within its maximum rating of 16 V.

Q: Are all substitute parts RoHS compliant?

A: Yes. The LT6003HS5#TRMPBF, LT6003HS5#TRPBF, and MCP6H01T-E/OT are all ROHS3 compliant. The original LMH6640MFX is RoHS non-compliant due to its obsolete status.

Q: What is the operating temperature range difference between the LMH6640MFX and substitute parts?

A: The LMH6640MFX operates from -40°C to 85°C. All substitute parts (LT6003HS5 series and MCP6H01T-E/OT) operate from -40°C to 125°C, providing extended high-temperature capability.

Q: Can I use these substitutes in high-frequency applications?

A: The LT6003HS5 series is not suitable for high-frequency applications due to its 3 kHz gain bandwidth product. The MCP6H01T-E/OT, with 1.2 MHz gain bandwidth product, is also significantly lower than the LMH6640MFX (62 MHz). Application-specific frequency requirements must be evaluated against each device's bandwidth specifications.