LT2079ACS#TRPBF Equivalent & Substitute Parts

Part Overview

The LT2079ACS#TRPBF is a general-purpose operational amplifier manufactured by Analog Devices Inc., featuring four independent amplifier circuits in a 14-SOIC surface-mount package. This device is classified as Active product status and is RoHS3 compliant. The LT2079ACS#TRPBF is designed for applications requiring low-power, general-purpose amplification with a wide supply voltage range of 2.2V to 36V and operating temperature range of 0°C to 70°C. Substitute parts are identified when equivalent functional performance can be achieved within the constraints of the application's electrical and mechanical requirements, accounting for differences in slew rate, gain bandwidth product, input bias current, and supply voltage specifications.

Key Parameters

Parameter	LT2079ACS#TRPBF
Manufacturer	Analog Devices Inc.
Category	Linear, Amplifiers
Amplifier Type	General Purpose
Number of Circuits	4
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Slew Rate	0.07V/µs
Gain Bandwidth Product	200 kHz
Current - Input Bias	6 nA
Voltage - Input Offset	60 µV
Current - Supply	46µA (x4 Channels)
Voltage - Supply Span (Min)	2.2 V
Voltage - Supply Span (Max)	36 V
Operating Temperature	0°C ~ 70°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the LT2079ACS#TRPBF are identified based on the following critical parameters that determine functional equivalence:

Package Compatibility: All substitute parts utilize the 14-SOIC (0.154", 3.90mm Width) surface-mount package, ensuring mechanical and electrical pin compatibility.

Circuit Configuration: All substitute parts contain four independent amplifier circuits, matching the quad-amplifier architecture of the main part.

Supply Voltage Range: Substitute parts must operate within overlapping supply voltage specifications. The LT2079ACS#TRPBF operates from 2.2V to 36V. Substitute parts with minimum supply voltages of 3V to 4V and maximum supply voltages of 44V maintain compatibility for most applications within the 2.2V to 36V operating window, with the exception of applications requiring operation below 3V.

Compliance and Status: All substitute parts maintain Active product status and RoHS3 compliance, ensuring long-term availability and regulatory alignment.

Electrical Performance Variance: Substitute parts exhibit different slew rates (ranging from 2V/µs to 13V/µs), gain bandwidth products (ranging from 1.8 MHz to 4.5 MHz), input bias currents (ranging from 20 nA to 100 nA), and supply currents (ranging from 180µA to 1.9mA). These differences reflect trade-offs between power consumption and frequency response characteristics.

Parameter Comparison

Parameter	LT2079ACS#TRPBF	MC33074DR2G	MC33174DT	MC33174VDR2G	MC34074VDR2G	NCV33074DR2G
Manufacturer	Analog Devices Inc.	onsemi	STMicroelectronics	onsemi	onsemi	onsemi
Number of Circuits	4	4	4	4	4	4
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate	0.07V/µs	13V/µs	2V/µs	2.1V/µs	13V/µs	13V/µs
Gain Bandwidth Product	200 kHz	4.5 MHz	2.1 MHz	1.8 MHz	4.5 MHz	4.5 MHz
Current - Input Bias	6 nA	100 nA	100 nA	20 nA	100 nA	100 nA
Voltage - Input Offset	60 µV	1 mV	1 mV	2 mV	1 mV	1 mV
Current - Supply	46µA (x4 Channels)	1.9mA (x4 Channels)	220µA	180µA (x4 Channels)	1.9mA (x4 Channels)	1.9mA (x4 Channels)
Voltage - Supply Span (Min)	2.2 V	3 V	4 V	3 V	3 V	3 V
Voltage - Supply Span (Max)	36 V	44 V	44 V	44 V	44 V	44 V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

MC33074DR2G (onsemi): This substitute operates within the supply voltage range of the main part (3V to 44V) and maintains Active product status with RoHS3 compliance. The MC33074DR2G exhibits significantly higher slew rate (13V/µs) and gain bandwidth product (4.5 MHz) compared to the LT2079ACS#TRPBF, making it suitable for applications requiring faster transient response. However, the higher supply current (1.9mA per channel) and increased input bias current (100 nA) represent trade-offs in power efficiency and precision. This part is appropriate for general-purpose applications where higher bandwidth is beneficial and power consumption is not a primary constraint.

MC33174DT (STMicroelectronics): This substitute maintains Active product status and RoHS3 compliance with a minimum supply voltage of 4V, which restricts its use to applications operating above 4V. The operating temperature range extends to 105°C, providing enhanced thermal capability. The MC33174DT offers moderate slew rate (2V/µs) and gain bandwidth product (2.1 MHz), representing a middle ground between the LT2079ACS#TRPBF and higher-performance alternatives. Supply current of 220µA per channel is lower than MC33074DR2G but higher than the main part.

MC33174VDR2G (onsemi): This substitute provides the widest operating temperature range (-40°C to 125°C) among all alternatives and maintains Active product status with RoHS3 compliance. The minimum supply voltage of 3V aligns closely with the main part's lower operating threshold. The MC33174VDR2G features the lowest gain bandwidth product (1.8 MHz) and moderate slew rate (2.1V/µs), with input bias current of 20 nA, which is significantly lower than most alternatives. Supply current of 180µA per channel is the lowest among the higher-performance substitutes. This part is suitable for applications requiring extended temperature operation and lower power consumption.

MC34074VDR2G (onsemi): This substitute is packaged in Tape & Reel format, matching the main part's packaging type. It maintains Active product status and RoHS3 compliance with an extended operating temperature range of -40°C to 125°C. The MC34074VDR2G exhibits high slew rate (13V/µs) and gain bandwidth product (4.5 MHz), with supply voltage range of 3V to 44V. Supply current of 1.9mA per channel and input bias current of 100 nA are consistent with the MC33074DR2G. This part is appropriate for applications requiring high-speed operation and extended temperature performance.

NCV33074DR2G (onsemi): This substitute is qualified to AEC-Q100 automotive standards and carries the Automotive grade designation. It maintains Active product status and RoHS3 compliance with supply voltage range of 3V to 44V and operating temperature range of -40°C to 85°C. The NCV33074DR2G exhibits identical electrical characteristics to the MC33074DR2G (13V/µs slew rate, 4.5 MHz gain bandwidth product, 100 nA input bias current, 1.9mA supply current). This part is specifically designated for automotive applications requiring qualified components.

Frequently Asked Questions (FAQ)

Q: Can the MC33074DR2G directly replace the LT2079ACS#TRPBF in all applications?

A: The MC33074DR2G is mechanically compatible (14-SOIC package) and functionally equivalent in terms of circuit count and basic amplifier architecture. However, the MC33074DR2G operates with a minimum supply voltage of 3V, which excludes applications requiring operation below 3V. Additionally, the MC33074DR2G exhibits higher slew rate (13V/µs vs. 0.07V/µs) and gain bandwidth product (4.5 MHz vs. 200 kHz), which may affect circuit behavior in applications sensitive to these parameters. Verification of circuit performance is necessary when substituting between parts with significantly different frequency response characteristics.

Q: What is the primary difference between MC33174VDR2G and MC33074DR2G?

A: The MC33174VDR2G and MC33074DR2G differ in frequency response and power consumption characteristics. The MC33174VDR2G provides lower gain bandwidth product (1.8 MHz vs. 4.5 MHz), lower slew rate (2.1V/µs vs. 13V/µs), and lower supply current (180µA vs. 1.9mA per channel). The MC33174VDR2G also features lower input bias current (20 nA vs. 100 nA) and an extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C). Selection between these parts depends on whether the application prioritizes bandwidth and speed (MC33074DR2G) or power efficiency and precision (MC33174VDR2G).

Q: Is the NCV33074DR2G suitable for automotive applications?

A: The NCV33074DR2G is specifically qualified to AEC-Q100 automotive standards and carries the Automotive grade designation. This qualification indicates compliance with automotive industry reliability and quality requirements. The NCV33074DR2G is appropriate for automotive applications requiring qualified components. Non-automotive substitute parts (MC33074DR2G, MC33174VDR2G, MC34074VDR2G, MC33174DT) do not carry automotive qualification and should not be used in applications requiring AEC-Q100 compliance.

Q: What is the significance of the minimum supply voltage difference between substitutes?

A: The LT2079ACS#TRPBF operates with a minimum supply voltage of 2.2V, while most substitutes require a minimum of 3V or 4V. Applications designed to operate at supply voltages below 3V cannot use MC33074DR2G, MC33174VDR2G, MC34074VDR2G, or NCV33074DR2G. The MC33174DT requires a minimum of 4V, further restricting its use. For applications operating below 3V, the LT2079ACS#TRPBF remains the only suitable option among the listed parts.

Q: How do packaging differences affect substitution?

A: All substitute parts utilize the 14-SOIC (0.154", 3.90mm Width) surface-mount package, ensuring mechanical compatibility with the LT2079ACS#TRPBF. Packaging differences exist in the distribution format: the LT2079ACS#TRPBF and MC34074VDR2G are supplied in Tape & Reel (TR) format, while MC33074DR2G, MC33174DT, MC33174VDR2G, and NCV33074DR2G are supplied in Cut Tape (CT) or Cut Tape & Digi-Reel® format. These distribution format differences do not affect electrical or mechanical compatibility but may influence procurement and handling procedures.

Q: Which substitute part offers the best balance of performance and power efficiency?

A: The MC33174VDR2G provides the lowest supply current (180µA per channel) and lowest input bias current (20 nA) among the substitutes, combined with an extended operating temperature range (-40°C to 125°C). This part is suitable for applications prioritizing power efficiency and precision. The MC33074DR2G and MC34074VDR2G offer higher performance (13V/µs slew rate, 4.5 MHz gain bandwidth product) at the cost of increased power consumption (1.9mA per channel). Selection depends on application-specific requirements for bandwidth, power consumption, and operating temperature.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed (MC33074DR2G, MC33174DT, MC33174VDR2G, MC34074VDR2G, NCV33074DR2G) are RoHS3 compliant, matching the compliance status of the LT2079ACS#TRPBF. All parts are also REACH Unaffected and carry ECCN EAR99 classification. Regulatory compliance is consistent across all listed parts.

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