LMH6658MA Equivalent & Substitute Parts

Part Overview

The LMH6658MA is a voltage feedback amplifier integrated circuit manufactured by Texas Instruments, featuring two circuits in an 8-SOIC surface mount package. This device is classified as obsolete, though 20,400 units remain in stock. The LMH6658MA delivers rail-to-rail output capability with a slew rate of 700V/µs and gain bandwidth product of 140 MHz, designed for applications requiring dual-channel voltage feedback amplification across supply voltages from 3V to 12V.

Due to the obsolete product status, identifying functionally equivalent substitute parts is essential for design continuity, long-term component availability, and supply chain reliability. Active alternatives with comparable electrical and mechanical specifications are available from Analog Devices Inc. and other manufacturers.

Substiute Parts

LMH6658MA

Texas InstrumentsIn Stock: 20473LMH6658MA Datasheet

Current PartRFQ

LMH6658MA/NOPB

National SemiconductorIn Stock: 1666LMH6658MA/NOPB Datasheet

DirectRFQ

AD8039ARZ

Analog Devices Inc.In Stock: 3257AD8039ARZ Datasheet

MFR RecommendedRFQ

AD8039ARZ-REEL

Analog Devices Inc.In Stock: 18389AD8039ARZ-REEL Datasheet

MFR RecommendedRFQ

AD8039ARZ-REEL7

Analog Devices Inc.In Stock: 15449AD8039ARZ-REEL7 Datasheet

MFR RecommendedRFQ

AD8058ARZ

Analog Devices Inc.In Stock: 1404AD8058ARZ Datasheet

MFR RecommendedRFQ

AD8058ARZ-REEL7

Analog Devices Inc.In Stock: 2210AD8058ARZ-REEL7 Datasheet

MFR RecommendedRFQ

LT1819CS8#TRPBF

Analog Devices Inc.In Stock: 1993LT1819CS8#TRPBF Datasheet

MFR RecommendedRFQ

LT1819IS8#TRPBF

Analog Devices Inc.In Stock: 808LT1819IS8#TRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LMH6658MA is determined by strict alignment of electrical and mechanical parameters. The following criteria establish compatibility:

Primary Substitution Criteria:

• Amplifier Type: Voltage Feedback
• Number of Circuits: 2
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Voltage - Supply Span: 3V to 12V minimum
• Operating Temperature Range: -40°C to 85°C minimum

Secondary Performance Parameters:

• Slew Rate: 700V/µs or greater
• -3dB Bandwidth: 270 MHz or greater
• Current - Input Bias: 5 µA or lower
• Voltage - Input Offset: 1 mV or lower
• Current - Supply per Channel: 6.5 mA or lower
• Current - Output per Channel: 110 mA or greater

Substitute parts are grouped into two categories based on their alignment with these parameters:

Category 1 - Direct Functional Equivalents: Parts meeting all primary and secondary criteria with identical or superior performance characteristics.

Category 2 - Functional Alternatives: Parts meeting all primary criteria with variations in secondary performance parameters that may require circuit evaluation.

Parameter Comparison

Engineering Selection Recommendations

LMH6658MA/NOPB (National Semiconductor)

This part is the primary direct substitute for the LMH6658MA. It maintains identical electrical specifications including 700V/µs slew rate, 140 MHz gain bandwidth product, and 270 MHz -3dB bandwidth. The part is in active product status with 1,596 units in stock. Both parts share the same 8-SOIC package and -40°C to 85°C operating temperature range. The LMH6658MA/NOPB is suitable for direct replacement in existing designs without circuit modification.

AD8039ARZ, AD8039ARZ-REEL, and AD8039ARZ-REEL7 (Analog Devices Inc.)

These three variants represent the same base part (AD8039) in different packaging configurations. All three are active products with superior input bias current (0.4 µA versus 5 µA) and lower input offset voltage (0.5 mV versus 1 mV). The -3dB bandwidth is higher at 350 MHz compared to 270 MHz. However, the slew rate is lower at 425V/µs versus 700V/µs, and supply current per channel is significantly lower at 1 mA versus 6.5 mA. These parts are ROHS3 compliant. Selection among the three variants depends on packaging requirements: AD8039ARZ (Tube), AD8039ARZ-REEL (Cut Tape & Digi-Reel), and AD8039ARZ-REEL7 (Cut Tape & Digi-Reel with 7-inch reel). AD8039ARZ-REEL has the highest inventory at 18,292 units.

AD8058ARZ and AD8058ARZ-REEL7 (Analog Devices Inc.)

Both variants use the AD8058 base part in different packaging. These parts feature the highest slew rate at 1150V/µs, exceeding the LMH6658MA specification. The -3dB bandwidth is 325 MHz. Input bias current is 0.5 µA and input offset voltage is 1 mV, matching the LMH6658MA offset specification. Supply current per channel is 14 mA, higher than the LMH6658MA at 6.5 mA. Both are ROHS3 compliant and support the full -40°C to 85°C operating temperature range. AD8058ARZ is packaged in Tube (1,360 units in stock), while AD8058ARZ-REEL7 is Cut Tape & Digi-Reel format (2,191 units in stock).

LT1819CS8#TRPBF and LT1819IS8#TRPBF (Analog Devices Inc.)

These general purpose amplifiers offer significantly higher performance with 2500V/µs slew rate and 400 MHz gain bandwidth product. Input bias current is 2 µA and input offset voltage is 0.2 µV. Both are ROHS3 compliant. The key distinction is operating temperature: LT1819CS8#TRPBF operates from 0°C to 70°C, while LT1819IS8#TRPBF covers -40°C to 85°C. For applications requiring the full industrial temperature range, LT1819IS8#TRPBF is the appropriate selection. Output current per channel is 70 mA, lower than the LMH6658MA at 110 mA. These parts are suitable for designs where higher bandwidth and slew rate provide performance advantages.

Frequently Asked Questions (FAQ)

Q1: Can the LMH6658MA/NOPB be used as a direct replacement for the LMH6658MA?

Yes. The LMH6658MA/NOPB is a direct functional equivalent with identical electrical specifications. Both parts feature 700V/µs slew rate, 140 MHz gain bandwidth product, 270 MHz -3dB bandwidth, and identical supply voltage range (3V to 12V). The package, pinout, and operating temperature range are identical. No circuit modifications are required.

Q2: What are the key differences between the AD8039 variants and the LMH6658MA?

The AD8039 series offers lower input bias current (0.4 µA versus 5 µA) and lower input offset voltage (0.5 mV versus 1 mV), resulting in improved precision. The -3dB bandwidth is higher at 350 MHz. However, the slew rate is lower at 425V/µs compared to 700V/µs, and supply current per channel is significantly reduced to 1 mA. These trade-offs make the AD8039 suitable for precision applications where lower power consumption is beneficial, but not for applications requiring the higher slew rate of the LMH6658MA.

Q3: What is the difference between AD8039ARZ, AD8039ARZ-REEL, and AD8039ARZ-REEL7?

All three variants contain the identical AD8039 die and electrical specifications. The differences are in packaging and tape format. AD8039ARZ is supplied in Tube packaging for manual handling. AD8039ARZ-REEL and AD8039ARZ-REEL7 are both supplied on Cut Tape & Digi-Reel format for automated assembly, with the REEL7 variant using a 7-inch reel. Selection depends on manufacturing process requirements and inventory availability.

Q4: When should the AD8058 series be selected over the LMH6658MA?

The AD8058 series is appropriate when higher slew rate performance is required. At 1150V/µs, the AD8058 slew rate exceeds the LMH6658MA by 64%. The -3dB bandwidth is also higher at 325 MHz. However, supply current per channel increases to 14 mA versus 6.5 mA. Select the AD8058 when circuit design requires faster transient response and power consumption is not a limiting factor.

Q5: What is the operating temperature difference between LT1819CS8#TRPBF and LT1819IS8#TRPBF?

LT1819CS8#TRPBF operates from 0°C to 70°C (commercial temperature range), while LT1819IS8#TRPBF operates from -40°C to 85°C (industrial temperature range). For applications requiring operation at temperatures below 0°C or above 70°C, the LT1819IS8#TRPBF is the required selection. Both parts are otherwise electrically identical.

Q6: Are all substitute parts ROHS3 compliant?

The LMH6658MA is RoHS non-compliant. All active substitute parts listed (LMH6658MA/NOPB, AD8039 series, AD8058 series, and LT1819 series) are ROHS3 compliant. This compliance status should be verified against specific design and regulatory requirements.

Q7: Can the LT1819 series replace the LMH6658MA in all applications?

The LT1819 series offers superior performance in slew rate (2500V/µs versus 700V/µs) and gain bandwidth product (400 MHz versus 140 MHz). However, output current per channel is lower at 70 mA versus 110 mA. Additionally, LT1819CS8#TRPBF has a restricted operating temperature range (0°C to 70°C). Substitution is application-dependent and requires verification that the lower output current and, for the CS variant, the narrower temperature range do not conflict with circuit requirements.

Q8: What packaging options are available for the substitute parts?

All substitute parts are available in 8-SOIC surface mount package. Packaging format variations include: Bulk, Tube, and Cut Tape & Digi-Reel (standard and 7-inch reel). Selection depends on manufacturing process automation requirements and volume handling procedures.

Q9: Which substitute part has the highest inventory availability?

AD8039ARZ-REEL has the highest inventory at 18,292 units, followed by LMH6658MA/NOPB at 1,596 units. For immediate availability and supply chain continuity, AD8039ARZ-REEL is the preferred alternative when electrical specifications are compatible with design requirements.

Q10: Are there any moisture sensitivity concerns with these parts?

All parts listed, including the LMH6658MA and all substitutes, have Moisture Sensitivity Level (MSL) of 1 (Unlimited). This classification indicates no moisture sensitivity restrictions and no special storage or handling requirements related to moisture exposure.