LMH6682MM Equivalent & Substitute Parts

Part Overview

The LMH6682MM is a voltage feedback operational amplifier featuring dual circuits in an 8-VSSOP surface mount package, manufactured by Texas Instruments. This device is classified as obsolete, though 1,980 pieces remain in current inventory. The LMH6682MM operates across a supply voltage range of 3V to 12V with a slew rate of 940V/µs and gain bandwidth product of 120 MHz, making it suitable for general-purpose amplification applications requiring moderate bandwidth and speed characteristics.

Due to its obsolete product status, identifying equivalent and substitute parts is necessary for design continuity, long-term supply chain planning, and new production runs. Active alternatives with identical or superior electrical characteristics are available from multiple manufacturers.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Voltage Feedback	—
Number of Circuits	2	—
Slew Rate	940	V/µs
Gain Bandwidth Product	120	MHz
-3dB Bandwidth	190	MHz
Current - Input Bias	5	µA
Voltage - Input Offset	1	mV
Current - Supply	6.5 (x2 Channels)	mA
Current - Output / Channel	85	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	12	V
Operating Temperature	-40 to 85	°C
Mounting Type	Surface Mount	—
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	—
Supplier Device Package	8-VSSOP	—

Substitute Part Grouping Explanation

Substitute parts for the LMH6682MM are categorized based on strict parametric equivalence and functional compatibility. The substitution logic is determined by the following critical parameters:

Primary Equivalence Criteria:

Amplifier Type: Voltage Feedback (required for direct functional replacement)
Number of Circuits: 2 (dual-channel configuration)
Package Type: 8-pin surface mount (8-VSSOP, 8-TSSOP, or 8-MSOP)
Supply Voltage Range: Minimum 3V, Maximum 12V
Operating Temperature Range: -40°C to 85°C (or compatible subset)

Grouping Categories:

Group 1: Direct Manufacturer Equivalents (Identical Electrical Specifications) Parts with matching slew rate (940V/µs), gain bandwidth product (120 MHz), and -3dB bandwidth (190 MHz). These provide pin-for-pin and functional equivalence.

Group 2: Parametric Equivalents (Enhanced Performance) Parts with superior electrical characteristics (higher slew rate, higher bandwidth, lower input bias current) while maintaining compatible supply voltage and package footprint. These offer improved performance margins.

Group 3: Functional Alternatives (Different Amplifier Class) Parts with different amplifier classification (General Purpose vs. Voltage Feedback) but compatible package, supply voltage, and dual-circuit configuration. These require application-level verification.

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	GBW (MHz)	-3dB BW (MHz)	Input Bias (µA)	Supply Current (mA)	Package	RoHS Status
LMH6682MM	Texas Instruments	Obsolete	940	120	190	5	6.5 (x2)	8-VSSOP	Non-compliant
LMH6682MM/NOPB	National Semiconductor	Active	940	120	190	5	6.5 (x2)	8-VSSOP	—
LMH6682MMX/NOPB	Texas Instruments	Active	940	120	190	5	6.5 (x2)	8-VSSOP	ROHS3 Compliant
AD8058ARMZ	Analog Devices Inc.	Active	1150	100	325	0.5	14	8-MSOP	ROHS3 Compliant
AD8058ARMZ-REEL	Analog Devices Inc.	Active	1150	100	325	0.5	14	8-MSOP	ROHS3 Compliant
AD8058ARMZ-REEL7	Analog Devices Inc.	Active	1150	100	325	0.5	0.5	8-MSOP	ROHS3 Compliant
LT1819CMS8#PBF	Analog Devices Inc.	Active	2500	400	—	2	9 (x2)	8-MSOP	ROHS3 Compliant
LT1819CMS8#TRPBF	Analog Devices Inc.	Active	2500	400	—	2	9 (x2)	8-MSOP	ROHS3 Compliant
LT1819IMS8#PBF	Analog Devices Inc.	Active	2500	400	—	2	9 (x2)	8-MSOP	ROHS3 Compliant
LT1819IMS8#TRPBF	Analog Devices Inc.	Active	2500	400	—	2	9 (x2)	8-MSOP	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

LMH6682MMX/NOPB is the primary recommended substitute. This part maintains identical electrical specifications (940V/µs slew rate, 120 MHz GBW, 190 MHz -3dB bandwidth) and dual-circuit configuration. The device is manufactured by Texas Instruments with Active product status and ROHS3 compliance, addressing the RoHS non-compliance limitation of the original LMH6682MM. Inventory availability is 2,774 pieces in Tape & Reel packaging.

LMH6682MM/NOPB, manufactured by National Semiconductor, provides identical parametric equivalence with Active product status. This option is suitable when bulk packaging is preferred, with 1,234 pieces available.

For Enhanced Performance Applications:

AD8058ARMZ-REEL7 offers superior electrical performance with 1150V/µs slew rate (22% improvement), 325 MHz -3dB bandwidth (71% improvement), and significantly lower input bias current (0.5 µA vs. 5 µA). This part is ROHS3 compliant with the highest inventory availability (19,100 pieces). The trade-off is increased supply current (14 mA vs. 6.5 mA per channel). Package compatibility is maintained through 8-MSOP footprint.

For Extended Temperature Range Applications:

LT1819IMS8#PBF and LT1819IMS8#TRPBF extend the operating temperature range to -40°C to 85°C (matching the original specification) while providing significantly enhanced bandwidth (400 MHz GBW, 2500V/µs slew rate). These parts are classified as General Purpose amplifiers rather than Voltage Feedback, requiring circuit-level verification for specific applications. ROHS3 compliance is confirmed.

Compliance Considerations:

All recommended active substitutes carry ROHS3 compliance certification, addressing the non-compliance status of the obsolete LMH6682MM. REACH Unaffected status is consistent across all alternatives. ECCN and HTSUS classifications remain identical (EAR99 and 8542.33.0001 respectively).

Frequently Asked Questions (FAQ)

Q1: Can LMH6682MMX/NOPB be used as a direct drop-in replacement for LMH6682MM?

Yes. LMH6682MMX/NOPB maintains identical electrical specifications including slew rate (940V/µs), gain bandwidth product (120 MHz), and -3dB bandwidth (190 MHz). The dual-circuit configuration, supply voltage range (3V to 12V), and operating temperature range (-40°C to 85°C) are identical. The 8-VSSOP package footprint is compatible. The primary advantage is Active product status and ROHS3 compliance.

Q2: What are the key differences between the LMH6682MM and AD8058ARMZ-REEL7?

The AD8058ARMZ-REEL7 provides enhanced performance specifications: slew rate increases from 940V/µs to 1150V/µs, -3dB bandwidth increases from 190 MHz to 325 MHz, and input bias current decreases from 5 µA to 0.5 µA. Supply current increases from 6.5 mA to 14 mA per channel. Both maintain dual-circuit configuration and compatible supply voltage range. The package changes from 8-VSSOP to 8-MSOP, which is mechanically compatible but requires PCB layout verification. The AD8058ARMZ-REEL7 is classified as Voltage Feedback amplifier, matching the original classification.

Q3: Are the LT1819 series parts suitable replacements for the LMH6682MM?

LT1819 series parts (LT1819CMS8#PBF, LT1819CMS8#TRPBF, LT1819IMS8#PBF, LT1819IMS8#TRPBF) provide significantly enhanced bandwidth (400 MHz GBW, 2500V/µs slew rate) but are classified as General Purpose amplifiers rather than Voltage Feedback amplifiers. These parts are suitable only when application-level circuit verification confirms compatibility with the General Purpose amplifier topology. The 8-MSOP package is mechanically compatible. Supply current is 9 mA per channel (vs. 6.5 mA for the original). LT1819CMS8 variants operate at 0°C to 70°C, while LT1819IMS8 variants extend to -40°C to 85°C.

Q4: What packaging options are available for substitutes?

Substitute parts are available in multiple packaging formats: Bulk (LMH6682MM/NOPB), Tape & Reel (LMH6682MMX/NOPB, LT1819CMS8#TRPBF, LT1819IMS8#TRPBF), Cut Tape & Digi-Reel (AD8058ARMZ-REEL7), and Tube (AD8058ARMZ, LT1819CMS8#PBF, LT1819IMS8#PBF). Selection depends on production volume and assembly process requirements.

Q5: Do all substitute parts meet RoHS compliance requirements?

All active substitute parts listed carry ROHS3 compliance certification. The original LMH6682MM is RoHS non-compliant. For applications requiring RoHS compliance, LMH6682MMX/NOPB, AD8058ARMZ variants, and LT1819 series parts all satisfy this requirement.

Q6: What is the inventory status for each substitute part?

LMH6682MMX/NOPB: 2,774 pieces (Tape & Reel). LMH6682MM/NOPB: 1,234 pieces (Bulk). AD8058ARMZ: 2,204 pieces (Tube). AD8058ARMZ-REEL: 2,400 pieces. AD8058ARMZ-REEL7: 19,100 pieces (highest availability). LT1819CMS8#PBF: 2,660 pieces (Tube). LT1819CMS8#TRPBF: 3,054 pieces (Tape & Reel). LT1819IMS8#PBF: 2,380 pieces (Tube). LT1819IMS8#TRPBF: 2,240 pieces (Tape & Reel).

Q7: Are there any supply voltage or temperature range limitations when substituting?

All substitute parts maintain the 3V to 12V supply voltage range of the original LMH6682MM. Operating temperature ranges vary: LMH6682MMX/NOPB and AD8058 variants match the original -40°C to 85°C range. LT1819CMS8 variants operate at 0°C to 70°C (narrower range), while LT1819IMS8 variants extend to -40°C to 85°C (matching the original). Application requirements must determine acceptable temperature range limitations.

Q8: What is the significance of the "/NOPB" suffix in part numbers?

The "/NOPB" suffix indicates "No Plumbum" (lead-free) packaging, confirming RoHS compliance. This designation is present on LMH6682MM/NOPB and LMH6682MMX/NOPB, confirming lead-free solder compatibility for modern manufacturing processes.

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