LMH6622MM Equivalent & Substitute Parts

Part Overview

The LMH6622MM is a voltage feedback operational amplifier featuring two differential circuits in an 8-VSSOP surface mount package, manufactured by Texas Instruments. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and production continuity. The LMH6622MM operates across a 5V to 12V supply range with a slew rate of 85V/µs and -3dB bandwidth of 160 MHz, making it suitable for applications requiring dual-channel amplification with differential output capability.

Key Parameters

Parameter	Value
Manufacturer Part Number	LMH6622MM
Manufacturer	Texas Instruments
Category	Linear, Amplifiers
Amplifier Type	Voltage Feedback
Number of Circuits	2
Output Type	Differential
Slew Rate	85 V/µs
-3dB Bandwidth	160 MHz
Current - Input Bias	4.7 µA
Voltage - Input Offset	200 µV
Current - Supply (x2 Channels)	4.3 mA
Current - Output / Channel	90 mA
Voltage - Supply Span (Min)	5 V
Voltage - Supply Span (Max)	12 V
Operating Temperature	-40°C to 85°C
Mounting Type	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package	8-VSSOP
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LMH6622MM is determined by the following critical parameters: amplifier type (voltage feedback), number of circuits (2), surface mount package compatibility (8-VSSOP/8-MSOP), supply voltage range, slew rate, bandwidth, and input/output electrical characteristics.

Direct Equivalent (Same Manufacturer): The LMH6622MM/NOPB is the direct equivalent from Texas Instruments, maintaining identical electrical specifications and package footprint. This part differs only in packaging format (Tape & Reel) and product status (Active), making it the primary replacement for obsolete stock.

Cross-Manufacturer Substitutes (Analog Devices LT1816 Series): The LT1816 series from Analog Devices Inc. provides functional substitution based on voltage feedback amplifier topology with dual circuits in compatible 8-MSOP packaging. These parts maintain the same number of circuits (2), input offset voltage (200 µV), and surface mount configuration. However, the LT1816 series exhibits enhanced electrical performance characteristics including higher slew rate (1500V/µs versus 85V/µs), greater bandwidth (350 MHz versus 160 MHz), and lower input bias current (2 µA versus 4.7 µA). The LT1816 series operates across a wider supply voltage range (2.5V to 11V) and includes variants with extended temperature ratings (-40°C to 85°C).

Substitution variants within the LT1816 series are differentiated by packaging format (Tube or Tape & Reel) and temperature grade (Commercial 0°C to 70°C or Industrial -40°C to 85°C).

Parameter Comparison

Parameter	LMH6622MM	LMH6622MM/NOPB	LT1816CMS8#PBF	LT1816CMS8#TRPBF	LT1816IMS8#PBF	LT1816IMS8#TRPBF
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Product Status	Obsolete	Active	Active	Active	Active	Active
Amplifier Type	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback
Number of Circuits	2	2	2	2	2	2
Slew Rate	85 V/µs	85 V/µs	1500 V/µs	1500 V/µs	1500 V/µs	1500 V/µs
-3dB Bandwidth	160 MHz	160 MHz	350 MHz	350 MHz	350 MHz	350 MHz
Current - Input Bias	4.7 µA	4.7 µA	2 µA	2 µA	2 µA	2 µA
Voltage - Input Offset	200 µV	200 µV	200 µV	200 µV	200 µV	200 µV
Current - Supply (x2 Channels)	4.3 mA	4.3 mA	6.5 mA	6.5 mA	6.5 mA	6.5 mA
Current - Output / Channel	90 mA	90 mA	80 mA	80 mA	80 mA	80 mA
Voltage - Supply Span (Min)	5 V	5 V	2.5 V	2.5 V	2.5 V	2.5 V
Voltage - Supply Span (Max)	12 V	12 V	11 V	11 V	11 V	11 V
Operating Temperature	-40°C to 85°C	-40°C to 85°C	0°C to 70°C	0°C to 70°C	-40°C to 85°C	-40°C to 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Bulk	Tape & Reel (TR)	Tube	Tape & Reel (TR)	Tube	Tape & Reel (TR)

Engineering Selection Recommendations

For Direct Replacement (Recommended Primary Option): The LMH6622MM/NOPB is the recommended direct substitute, maintaining identical electrical specifications and package footprint while offering Active product status and ROHS3 compliance. This part is suitable for applications requiring exact performance matching with the original LMH6622MM design.

For Enhanced Performance Applications: The LT1816 series from Analog Devices Inc. provides superior electrical performance with 1500V/µs slew rate (17.6× improvement), 350 MHz bandwidth (2.19× improvement), and lower input bias current (2 µA). These characteristics make the LT1816 series suitable for applications requiring higher speed operation and improved signal fidelity. All LT1816 variants are ROHS3 compliant and Active products.

Temperature Grade Selection: For applications requiring extended temperature operation (-40°C to 85°C), select LT1816IMS8#PBF or LT1816IMS8#TRPBF. For applications limited to commercial temperature range (0°C to 70°C), LT1816CMS8#PBF or LT1816CMS8#TRPBF are suitable.

Packaging Format Selection: Tube packaging (LT1816CMS8#PBF, LT1816IMS8#PBF) is appropriate for lower-volume applications and manual assembly. Tape & Reel packaging (LMH6622MM/NOPB, LT1816CMS8#TRPBF, LT1816IMS8#TRPBF) is required for automated pick-and-place assembly and high-volume production.

Compliance Considerations: The original LMH6622MM is RoHS non-compliant. All substitute parts (LMH6622MM/NOPB and LT1816 series) are ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and production.

Frequently Asked Questions (FAQ)

Q: Can the LT1816 series directly replace the LMH6622MM in existing designs? A: The LT1816 series maintains compatible package footprint (8-MSOP) and dual-circuit voltage feedback topology. However, the enhanced electrical performance (higher slew rate and bandwidth) may require circuit validation in applications with tight timing or frequency response specifications. Pin-level compatibility must be verified against the specific application schematic.

Q: What is the primary difference between LMH6622MM and LMH6622MM/NOPB? A: Both parts are electrically identical. The difference is packaging format: LMH6622MM is supplied in bulk, while LMH6622MM/NOPB is supplied in Tape & Reel format. The "/NOPB" designation indicates "No Plumbum" (lead-free) and ROHS3 compliance.

Q: Why do the LT1816 variants have different part numbers? A: LT1816 part numbers vary by three parameters: temperature grade (C = Commercial 0°C to 70°C; I = Industrial -40°C to 85°C), packaging format (MS = Tube; blank = standard), and suffix (PBF = Tube; TRPBF = Tape & Reel). Select based on application temperature requirements and assembly process.

Q: Is the LT1816 series suitable for all applications using the LMH6622MM? A: The LT1816 series is suitable for applications where the enhanced performance characteristics (higher slew rate, greater bandwidth, lower input bias current) do not introduce stability or noise issues. Applications with marginal gain-bandwidth product or phase margin specifications should be re-evaluated with the LT1816 series parameters.

Q: What is the supply voltage compatibility between these parts? A: The LMH6622MM and LMH6622MM/NOPB operate from 5V to 12V. The LT1816 series operates from 2.5V to 11V. For applications using 5V to 11V supplies, all parts are compatible. For applications requiring 11.5V to 12V operation, only the LMH6622 variants are suitable.

Q: Are there any moisture sensitivity considerations for these parts? A: All parts listed have Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture control measures. Standard handling and storage practices are sufficient.

Q: What inventory status should influence part selection? A: The LMH6622MM is obsolete with limited remaining stock (1575 pcs). The LMH6622MM/NOPB is Active with 1487 pcs available. The LT1816 series is Active with inventory ranging from 2200 to 2270 pcs across variants. For long-term production continuity, the LT1816 series or LMH6622MM/NOPB are recommended.

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