LMH6654MF/NOPB Equivalent & Substitute Parts

Part Overview

The LMH6654MF/NOPB is a voltage feedback operational amplifier manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This single-circuit op-amp is designed for high-speed signal conditioning applications requiring a gain bandwidth product of 260 MHz and a slew rate of 200 V/µs. The device operates across a supply voltage range of 4.5 V to 12 V and maintains active product status with full RoHS3 compliance. Substitute parts are identified when equivalent functional performance, package compatibility, and electrical specifications align within acceptable operational parameters for the intended application.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Voltage Feedback	—
Number of Circuits	1	—
Slew Rate	200	V/µs
Gain Bandwidth Product	260	MHz
Current - Input Bias	5	µA
Voltage - Input Offset	1	mV
Current - Supply	4.5	mA
Current - Output / Channel	120	mA
Voltage - Supply Span (Min)	4.5	V
Voltage - Supply Span (Max)	12	V
Operating Temperature	-40 to 85	°C
Package / Case	SC-74A, SOT-753	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the LMH6654MF/NOPB are qualified based on the following criteria:

Primary Substitution Criteria:

Amplifier type: Voltage feedback topology
Package compatibility: SOT-23-5 or TSOT-23-5 surface mount packages
Number of circuits: Single circuit configuration
Operating temperature range: Minimum -40°C to 85°C coverage
Supply voltage compatibility: Overlap within 4.5 V to 12 V range
RoHS3 compliance and active product status

Secondary Electrical Parameters:

Slew rate ≥ 200 V/µs
Gain bandwidth product ≥ 260 MHz or -3dB bandwidth ≥ 300 MHz
Input bias current ≤ 400 nA
Input offset voltage ≤ 3 mV
Output current capability ≥ 60 mA per channel

The three identified substitutes (AD8055ARTZ-REEL7, LT1815IS5#TRMPBF, LT1815CS5#TRMPBF) meet these criteria with enhanced performance characteristics in slew rate and bandwidth while maintaining functional equivalence in single-circuit voltage feedback topology and package form factor.

Parameter Comparison

Parameter	LMH6654MF/NOPB	AD8055ARTZ-REEL7	LT1815IS5#TRMPBF	LT1815CS5#TRMPBF
Manufacturer	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	Voltage Feedback	Voltage Feedback	Voltage Feedback	Voltage Feedback
Number of Circuits	1	1	1	1
Slew Rate (V/µs)	200	1400	1500	1500
Gain Bandwidth Product (MHz)	260	—	220	220
-3dB Bandwidth (MHz)	—	300	350	350
Current - Input Bias (µA / nA)	5 µA	400 nA	2 µA	2 µA
Voltage - Input Offset (mV / µV)	1 mV	3 mV	200 µV	200 µV
Current - Supply (mA)	4.5	5.4	6.5	6.5
Current - Output / Channel (mA)	120	60	—	—
Voltage - Supply Span (Min)	4.5 V	8 V	2.5 V	2.5 V
Voltage - Supply Span (Max)	12 V	12 V	11 V	11 V
Operating Temperature	-40 to 85°C	-40 to 85°C	-40 to 85°C	0 to 70°C
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	SOT-23-5 Thin, TSOT-23-5	SOT-23-5 Thin, TSOT-23-5
Supplier Device Package	SOT-23-5	SOT-23-5	TSOT-23-5	TSOT-23-5
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

AD8055ARTZ-REEL7 (Analog Devices Inc.)

This substitute offers superior slew rate performance at 1400 V/µs and -3dB bandwidth of 300 MHz, exceeding the LMH6654MF/NOPB specifications. The device maintains identical package form factor (SOT-23-5) and operating temperature range (-40°C to 85°C). However, the minimum supply voltage requirement is 8 V, which restricts operation below this threshold compared to the 4.5 V minimum of the original part. Output current per channel is 60 mA, lower than the 120 mA capability of the LMH6654MF/NOPB. Selection is appropriate for applications requiring enhanced bandwidth and slew rate performance within the 8 V to 12 V supply range.

LT1815IS5#TRMPBF (Analog Devices Inc.)

This substitute provides the widest operating temperature range (-40°C to 85°C) matching the original part exactly. The device features superior slew rate (1500 V/µs) and -3dB bandwidth (350 MHz). Input offset voltage is significantly lower at 200 µV compared to 1 mV. The package is TSOT-23-5 (thin variant), which is mechanically compatible with SOT-23-5 footprints. Minimum supply voltage is 2.5 V, providing broader low-voltage operation capability. Selection is appropriate for applications requiring extended temperature coverage and improved input offset characteristics.

LT1815CS5#TRMPBF (Analog Devices Inc.)

This substitute shares identical electrical specifications with LT1815IS5#TRMPBF but operates within a restricted temperature range of 0°C to 70°C. This narrower operating temperature range excludes applications requiring full -40°C to 85°C coverage. All other performance characteristics, including slew rate (1500 V/µs), -3dB bandwidth (350 MHz), and input offset voltage (200 µV), remain equivalent to the LT1815IS5#TRMPBF variant. Selection is appropriate only for applications with operating temperature requirements within 0°C to 70°C.

All substitute parts maintain RoHS3 compliance, active product status, and REACH unaffected designation, ensuring regulatory and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the AD8055ARTZ-REEL7 operate at supply voltages below 8 V?

A: No. The AD8055ARTZ-REEL7 specifies a minimum supply voltage of 8 V, whereas the LMH6654MF/NOPB operates from 4.5 V minimum. Applications requiring operation below 8 V must use the original part or the LT1815 series substitutes, which support 2.5 V minimum supply voltage.

Q: Are the LT1815IS5#TRMPBF and LT1815CS5#TRMPBF electrically identical?

A: The devices are electrically identical in all specified parameters. The distinction is the operating temperature range: LT1815IS5#TRMPBF covers -40°C to 85°C, while LT1815CS5#TRMPBF covers 0°C to 70°C. Selection depends on the application's temperature requirements.

Q: Is the TSOT-23-5 package footprint compatible with SOT-23-5 PCB layouts?

A: Yes. TSOT-23-5 (thin variant) is mechanically and electrically compatible with SOT-23-5 footprints. The thin package occupies less vertical space but maintains identical lead pitch and positioning for direct board-level substitution.

Q: Why does the LMH6654MF/NOPB have higher output current capability (120 mA) than the AD8055ARTZ-REEL7 (60 mA)?

A: Output current capability is a distinct design characteristic determined by the internal output stage architecture. Applications requiring 120 mA output current must use the LMH6654MF/NOPB or verify that the substitute's 60 mA capability is sufficient for the intended load.

Q: What is the significance of the lower input offset voltage in the LT1815 series?

A: The LT1815 series specifies 200 µV input offset voltage compared to 1 mV for the LMH6654MF/NOPB. Lower input offset voltage reduces DC error in precision signal conditioning applications. This is a performance advantage for applications sensitive to DC accuracy.

Q: Can all three substitutes be used interchangeably in the same application?

A: Interchangeability depends on specific application requirements. All three meet the core substitution criteria (voltage feedback topology, SOT-23-5 package family, single circuit, RoHS3 compliance). However, differences in supply voltage range, output current, and operating temperature must be evaluated against application specifications before selection.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging?

A: Both are surface mount delivery formats. Tape & Reel (TR) provides continuous reel packaging for automated assembly. Cut Tape (CT) & Digi-Reel® offers smaller quantity packaging options. Electrical performance is identical; packaging choice depends on production volume and assembly equipment compatibility.

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