LMH6622MA Equivalent & Substitute Parts

Part Overview

The LMH6622MA is a voltage feedback amplifier integrated circuit manufactured by Texas Instruments, featuring two differential output circuits in an 8-SOIC surface mount package. This device is classified as obsolete product status. Due to its obsolete classification, equivalent and substitute parts with active product status are necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility through equivalent electrical parameters and identical or compatible packaging specifications.

Key Parameters

Parameter	Value	Unit
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 Range	-40 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution logic for the LMH6622MA is based on the following critical parameters: amplifier type (voltage feedback), number of circuits (2), package compatibility (8-SOIC surface mount), and electrical performance envelope defined by slew rate, bandwidth, supply voltage range, and operating temperature specifications.

The LMH6622MA/NOPB is a direct Texas Instruments variant with identical electrical specifications and packaging, differentiated only by packaging format (tube) and active product status with RoHS3 compliance.

The LT1816 series (LT1816CS8#PBF, LT1816CS8#TRPBF, LT1816IS8#PBF, LT1816IS8#TRPBF) from Analog Devices Inc. represents functional equivalents with enhanced electrical performance characteristics. These devices maintain the two-circuit voltage feedback amplifier architecture and 8-SOIC package footprint. Key differences include higher slew rate (1500 V/µs versus 85 V/µs), higher bandwidth (350 MHz versus 160 MHz), lower input bias current (2 µA versus 4.7 µA), and lower supply voltage minimum (2.5 V versus 5 V). Operating temperature ranges vary by grade: commercial (0°C to 70°C) and industrial (-40°C to 85°C).

Parameter Comparison

Parameter	LMH6622MA	LMH6622MA/NOPB	LT1816CS8#PBF	LT1816CS8#TRPBF	LT1816IS8#PBF	LT1816IS8#TRPBF
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
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 (V/µs)	85	85	1500	1500	1500	1500
-3dB Bandwidth (MHz)	160	160	350	350	350	350
Current - Input Bias (µA)	4.7	4.7	2	2	2	2
Voltage - Input Offset (µV)	200	200	200	200	200	200
Current - Supply (mA, x2 Channels)	4.3	4.3	6.5	6.5	6.5	6.5
Current - Output / Channel (mA)	90	90	80	80	80	80
Voltage - Supply Span Min (V)	5	5	2.5	2.5	2.5	2.5
Voltage - Supply Span Max (V)	12	12	11	11	11	11
Operating Temperature (°C)	-40 to 85	-40 to 85	0 to 70	0 to 70	-40 to 85	-40 to 85
Package / Case	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant
Packaging Format	Bulk	Tube	Tube	Tape & Reel	Tube	Tape & Reel

Engineering Selection Recommendations

Direct Replacement (Same Manufacturer): The LMH6622MA/NOPB is the recommended direct replacement for the obsolete LMH6622MA. This part maintains identical electrical specifications and 8-SOIC package compatibility. The primary advantages are active product status and RoHS3 compliance, enabling compliance with current environmental regulations and ensuring long-term supply availability. The packaging format difference (tube versus bulk) does not affect electrical performance or PCB assembly compatibility.

Functional Equivalent (Cross-Manufacturer): The LT1816 series from Analog Devices Inc. provides functional equivalence with enhanced performance characteristics. All variants (LT1816CS8#PBF, LT1816CS8#TRPBF, LT1816IS8#PBF, LT1816IS8#TRPBF) are active products with RoHS3 compliance. Selection among LT1816 variants depends on operating temperature requirements and packaging format:

For applications requiring commercial operating temperature range (0°C to 70°C), use LT1816CS8#PBF (tube packaging) or LT1816CS8#TRPBF (tape and reel packaging).

For applications requiring industrial operating temperature range (-40°C to 85°C), matching the LMH6622MA specification, use LT1816IS8#PBF (tube packaging) or LT1816IS8#TRPBF (tape and reel packaging).

The LT1816 series exhibits superior electrical performance with 1500 V/µs slew rate and 350 MHz bandwidth compared to the LMH6622MA specifications. These enhancements provide improved signal fidelity and faster transient response. Lower input bias current (2 µA) reduces input impedance loading effects. All LT1816 variants maintain the 8-SOIC package footprint and surface mount compatibility, enabling direct PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can the LMH6622MA/NOPB be used as a direct replacement for the LMH6622MA?

A: Yes. The LMH6622MA/NOPB is electrically and mechanically identical to the LMH6622MA. The only differences are packaging format (tube) and product status (active with RoHS3 compliance). No circuit modifications are required.

Q: What are the key differences between the LMH6622MA and LT1816 series?

A: The LT1816 series provides enhanced performance with 1500 V/µs slew rate (versus 85 V/µs), 350 MHz bandwidth (versus 160 MHz), and lower input bias current (2 µA versus 4.7 µA). Both maintain two-circuit voltage feedback amplifier architecture and 8-SOIC packaging. The LT1816 series operates at lower minimum supply voltage (2.5 V versus 5 V).

Q: Which LT1816 variant should be selected for industrial temperature applications?

A: For operating temperature range -40°C to 85°C, select either LT1816IS8#PBF (tube) or LT1816IS8#TRPBF (tape and reel). The "I" grade designation specifies industrial temperature range. The "S" grade (LT1816CS8 variants) is limited to 0°C to 70°C commercial range.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The LMH6622MA/NOPB and all LT1816 variants are RoHS3 compliant. The original LMH6622MA is RoHS non-compliant. Substitution with compliant parts ensures regulatory compliance for new designs and production.

Q: What is the difference between tube and tape & reel packaging?

A: Tube packaging is suitable for manual assembly and lower-volume applications. Tape & reel packaging is optimized for automated pick-and-place assembly in high-volume production. Electrical performance and PCB footprint compatibility are identical. Selection depends on assembly process requirements.

Q: Can the LT1816 series be used in applications designed for the LMH6622MA without circuit modifications?

A: The LT1816 series maintains functional compatibility through identical package footprint and two-circuit voltage feedback amplifier architecture. However, the enhanced performance characteristics (higher slew rate, bandwidth, and lower input bias current) may require circuit verification to ensure the application benefits from or is unaffected by these improvements. Pin-to-pin compatibility is maintained.

Q: What is the inventory status of substitute parts?

A: LMH6622MA/NOPB: 1337 pieces. LT1816CS8#PBF: 1110 pieces. LT1816CS8#TRPBF: 851 pieces. LT1816IS8#PBF: 703 pieces. LT1816IS8#TRPBF: 957 pieces. All parts are new original stock.

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