LMH6682MAX Equivalent & Substitute Parts

Part Overview

The LMH6682MAX is a voltage feedback amplifier integrated circuit manufactured by Texas Instruments, configured as a dual-channel (2 circuit) device in an 8-SOIC surface mount package. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for new designs and production continuity.

The LMH6682MAX operates across a supply voltage range of 3V to 12V with an operating temperature range of -40°C to 85°C. With a slew rate of 940V/µs and gain bandwidth product of 120 MHz, this device is suitable for applications requiring moderate-speed voltage feedback amplification. The part is RoHS non-compliant and carries an MSL rating of 1 (Unlimited).

Due to its obsolete status, direct substitution with active alternatives is required for ongoing production and new circuit implementations.

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 (per channel)	6.5	mA
Current - Output / Channel	85	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	12	V
Operating Temperature	-40 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
MSL Rating	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LMH6682MAX is determined by the following critical parameters:

Mandatory Compatibility 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: -40°C to 85°C minimum

Performance Parameters (allowable variation):

Slew Rate: 940V/µs (baseline)
Gain Bandwidth Product: 120 MHz (baseline)
-3dB Bandwidth: 190 MHz (baseline)
Current - Input Bias: 5 µA (baseline)
Voltage - Input Offset: 1 mV (baseline)
Current - Supply: 6.5mA per channel (baseline)
Current - Output / Channel: 85 mA (baseline)

Substitute parts are grouped into two categories:

Category 1: Direct Manufacturer Equivalents (Texas Instruments)

LMH6682MAX/NOPB: Identical electrical specifications with active product status and RoHS3 compliance. Packaging differs (Tape & Reel vs. standard).

Category 2: Cross-Manufacturer Voltage Feedback Amplifiers (Analog Devices Inc.)

AD8039ARZ, AD8039ARZ-REEL, AD8039ARZ-REEL7: Voltage feedback dual-channel amplifiers with identical package, supply range, and temperature range. Performance parameters differ (lower slew rate 425V/µs, higher bandwidth 350 MHz, lower input bias current 400 nA).
AD8058ARZ, AD8058ARZ-REEL7: Voltage feedback dual-channel amplifiers with identical package, supply range, and temperature range. Performance parameters differ (higher slew rate 1150V/µs, higher bandwidth 325 MHz, higher input bias current 500 nA).

Category 3: General Purpose Amplifiers (Analog Devices Inc.)

LT1819CS8#TRPBF, LT1819IS8#TRPBF: General purpose dual-channel amplifiers with identical package and supply range. Operating temperature differs (0°C to 70°C for CS8 variant; -40°C to 85°C for IS8 variant). Performance parameters differ significantly (higher slew rate 2500V/µs, higher bandwidth 400 MHz, lower input bias current 2 µA).

Parameter Comparison

Part Number	Manufacturer	Product Status	Amplifier Type	Slew Rate (V/µs)	-3dB Bandwidth (MHz)	Input Bias Current (nA)	Input Offset Voltage (mV)	Supply Current per Channel (mA)	Output Current per Channel (mA)	Supply Voltage Range (V)	Operating Temp (°C)	RoHS Status	Packaging
LMH6682MAX	Texas Instruments	Obsolete	Voltage Feedback	940	190	5000	1	6.5	85	3–12	-40 to 85	Non-compliant	8-SOIC
LMH6682MAX/NOPB	Texas Instruments	Active	Voltage Feedback	940	190	5000	1	6.5	85	3–12	-40 to 85	RoHS3 Compliant	Tape & Reel
AD8039ARZ	Analog Devices Inc.	Active	Voltage Feedback	425	350	400	0.5	1	—	3–12	-40 to 85	RoHS3 Compliant	Tube
AD8039ARZ-REEL	Analog Devices Inc.	Active	Voltage Feedback	425	350	400	0.5	1	—	3–12	-40 to 85	RoHS3 Compliant	Cut Tape & Digi-Reel
AD8039ARZ-REEL7	Analog Devices Inc.	Active	Voltage Feedback	425	350	400	0.5	1	—	3–12	-40 to 85	RoHS3 Compliant	Cut Tape & Digi-Reel
AD8058ARZ	Analog Devices Inc.	Active	Voltage Feedback	1150	325	500	1	14	—	3–12	-40 to 85	RoHS3 Compliant	Tube
AD8058ARZ-REEL7	Analog Devices Inc.	Active	Voltage Feedback	1150	325	500	1	14	—	3–12	-40 to 85	RoHS3 Compliant	Cut Tape & Digi-Reel
LT1819CS8#TRPBF	Analog Devices Inc.	Active	General Purpose	2500	400	2000	0.2	9	70	2.5–12.6	0 to 70	RoHS3 Compliant	Tape & Reel
LT1819IS8#TRPBF	Analog Devices Inc.	Active	General Purpose	2500	400	2000	0.2	9	70	2.5–12.6	-40 to 85	RoHS3 Compliant	Tape & Reel

Engineering Selection Recommendations

Primary Recommendation: LMH6682MAX/NOPB

The LMH6682MAX/NOPB is the direct equivalent of the obsolete LMH6682MAX. This part maintains identical electrical specifications, including slew rate (940V/µs), gain bandwidth product (120 MHz), and all DC parameters. The primary differences are product status (Active vs. Obsolete) and RoHS compliance (RoHS3 Compliant vs. Non-compliant). Packaging is Tape & Reel format. This part is the preferred choice for direct replacement in existing designs.

Secondary Recommendation: AD8039ARZ / AD8039ARZ-REEL / AD8039ARZ-REEL7

The AD8039 series (Analog Devices Inc.) provides voltage feedback dual-channel amplification in the identical 8-SOIC package with full supply voltage and temperature range compatibility. These parts feature lower slew rate (425V/µs vs. 940V/µs) and higher bandwidth (350 MHz vs. 190 MHz). Input bias current is significantly lower (400 nA vs. 5 µA), and supply current per channel is substantially reduced (1 mA vs. 6.5 mA). These characteristics make AD8039 suitable for applications where lower power consumption and higher bandwidth are beneficial. All variants carry RoHS3 compliance and active product status. Packaging options include Tube (AD8039ARZ), Cut Tape & Digi-Reel (AD8039ARZ-REEL and AD8039ARZ-REEL7).

Tertiary Recommendation: AD8058ARZ / AD8058ARZ-REEL7

The AD8058 series (Analog Devices Inc.) provides voltage feedback dual-channel amplification with higher slew rate (1150V/µs vs. 940V/µs) and higher bandwidth (325 MHz vs. 190 MHz). Input bias current is slightly higher (500 nA vs. 5 µA), and supply current per channel is elevated (14 mA vs. 6.5 mA). These characteristics make AD8058 suitable for applications requiring higher speed performance. All variants carry RoHS3 compliance and active product status. Packaging options include Tube (AD8058ARZ) and Cut Tape & Digi-Reel (AD8058ARZ-REEL7).

Alternative Consideration: LT1819CS8#TRPBF / LT1819IS8#TRPBF

The LT1819 series (Analog Devices Inc.) represents a general purpose amplifier alternative with significantly higher performance specifications: slew rate of 2500V/µs, gain bandwidth product of 400 MHz, and lower input bias current (2 µA). These parts are suitable for applications requiring substantially higher speed performance. The LT1819CS8#TRPBF variant operates over 0°C to 70°C, while LT1819IS8#TRPBF extends to -40°C to 85°C. Both carry RoHS3 compliance and active product status. Supply voltage range extends to 2.5V minimum and 12.6V maximum. All variants are packaged in Tape & Reel format.

Compliance and Certification Basis:

All recommended substitute parts carry RoHS3 compliance and active product status, ensuring regulatory compliance and long-term availability. The LMH6682MAX/NOPB is the preferred choice for direct replacement due to identical electrical specifications. Cross-manufacturer alternatives (AD8039, AD8058, LT1819) are suitable when performance optimization or cost considerations warrant evaluation of alternative electrical characteristics within the constraints of the 8-SOIC package and 3V–12V supply range.

Frequently Asked Questions (FAQ)

Q1: Can LMH6682MAX/NOPB be used as a direct replacement for LMH6682MAX?

A: Yes. The LMH6682MAX/NOPB is electrically identical to the LMH6682MAX. The primary differences are product status (Active vs. Obsolete) and RoHS compliance (RoHS3 Compliant vs. Non-compliant). Packaging is Tape & Reel format. No circuit modifications are required.

Q2: What are the key differences between LMH6682MAX and AD8039ARZ?

A: Both are dual-channel voltage feedback amplifiers in 8-SOIC packages with identical supply voltage range (3V–12V) and operating temperature range (-40°C to 85°C). The AD8039ARZ features lower slew rate (425V/µs vs. 940V/µs), higher bandwidth (350 MHz vs. 190 MHz), significantly lower input bias current (400 nA vs. 5 µA), and substantially lower supply current per channel (1 mA vs. 6.5 mA). Circuit performance will differ in applications sensitive to slew rate or bandwidth.

Q3: When should AD8058ARZ be selected over AD8039ARZ?

A: The AD8058ARZ is selected when higher slew rate (1150V/µs vs. 425V/µs) and higher bandwidth (325 MHz vs. 350 MHz) are required. The AD8058ARZ has higher supply current per channel (14 mA vs. 1 mA) and slightly higher input bias current (500 nA vs. 400 nA). Selection depends on application requirements for speed performance versus power consumption.

Q4: Are the LT1819 variants suitable replacements for LMH6682MAX?

A: The LT1819 variants are general purpose amplifiers with significantly higher performance: slew rate of 2500V/µs and gain bandwidth product of 400 MHz. These parts are suitable when substantially higher speed performance is required. The LT1819CS8#TRPBF operates over 0°C to 70°C (narrower temperature range), while LT1819IS8#TRPBF covers -40°C to 85°C (full range). Both are packaged in Tape & Reel format and carry RoHS3 compliance.

Q5: What packaging options are available for substitute parts?

A: Packaging options vary by part number. LMH6682MAX/NOPB is supplied in Tape & Reel (TR) format. AD8039 variants are available in Tube (AD8039ARZ), Cut Tape & Digi-Reel (AD8039ARZ-REEL and AD8039ARZ-REEL7). AD8058 variants are available in Tube (AD8058ARZ) and Cut Tape & Digi-Reel (AD8058ARZ-REEL7). LT1819 variants are supplied in Tape & Reel (TR) format. All parts maintain the 8-SOIC (0.154", 3.90mm Width) package footprint.

Q6: Do all substitute parts meet RoHS compliance requirements?

A: Yes. All recommended substitute parts carry RoHS3 compliance. The original LMH6682MAX is RoHS non-compliant. The LMH6682MAX/NOPB and all Analog Devices Inc. alternatives (AD8039, AD8058, LT1819 series) are RoHS3 compliant.

Q7: What is the inventory status of substitute parts?

A: Inventory levels vary. LMH6682MAX/NOPB has 3281 pcs in stock. AD8039ARZ has 3220 pcs, AD8039ARZ-REEL has 18292 pcs, AD8039ARZ-REEL7 has 15400 pcs. AD8058ARZ has 1360 pcs, AD8058ARZ-REEL7 has 2191 pcs. LT1819CS8#TRPBF has 1906 pcs, LT1819IS8#TRPBF has 791 pcs. Inventory levels are subject to change.

Q8: Are circuit modifications required when substituting with cross-manufacturer parts?

A: Circuit modifications depend on application sensitivity to electrical parameter differences. The LMH6682MAX/NOPB requires no modifications. AD8039 and AD8058 variants have different slew rates, bandwidths, and supply currents; circuit performance will differ. LT1819 variants have significantly higher performance specifications. Application-specific evaluation is required to determine if circuit modifications are necessary.

Q9: What is the MSL (Moisture Sensitivity Level) rating for all substitute parts?

A: All parts listed carry MSL rating of 1 (Unlimited), indicating no moisture sensitivity precautions are required during storage or handling.

Q10: Are all substitute parts available in -40°C to 85°C operating temperature range?

A: Yes, with one exception. LMH6682MAX/NOPB, AD8039 series, AD8058 series, and LT1819IS8#TRPBF all operate over -40°C to 85°C. The LT1819CS8#TRPBF operates over a narrower range of 0°C to 70°C and is not suitable for applications requiring full -40°C to 85°C coverage.

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