OP2177AR Equivalent & Substitute Parts

Part Overview

The OP2177AR is a general-purpose operational amplifier manufactured by Analog Devices Inc., configured as a dual-channel (2 circuit) device in an 8-SOIC surface mount package. This part is classified as obsolete, indicating it has been discontinued by the manufacturer. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Key Parameters

Parameter	Value
Manufacturer Part Number	OP2177AR
Manufacturer	Analog Devices Inc.
Category	Linear, Amplifiers
Amplifier Type	General Purpose
Number of Circuits	2
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Slew Rate	0.7 V/µs
Gain Bandwidth Product	1.3 MHz
Current - Input Bias	500 pA
Voltage - Input Offset	15 µV
Current - Supply	400 µA (x2 Channels)
Current - Output / Channel	10 mA
Voltage - Supply Span (Min)	5 V
Voltage - Supply Span (Max)	30 V
Operating Temperature	-40°C ~ 125°C
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the OP2177AR is determined by compatibility across the following critical parameters: package type (8-SOIC surface mount), number of circuits (dual-channel configuration), operating temperature range, supply voltage range, and electrical performance characteristics (slew rate, gain bandwidth product, input bias current, and output current capability).

Substitute parts are grouped into two categories:

Direct Equivalent: Parts that maintain identical electrical specifications and operating characteristics while differing only in product status or packaging format. The OP2177ARZ represents a direct equivalent with active product status.

Functional Alternatives: Parts that operate within the same supply voltage and temperature ranges, share the 8-SOIC package footprint, and provide dual-channel amplification but with enhanced or different electrical performance characteristics. These alternatives include both Analog Devices general-purpose amplifiers (ADA4077-2ARZ, ADA4177-2ARZ) and STMicroelectronics J-FET amplifiers (LF253DT, LF353DT, TL062CDT, TL062IDT, TL072ACDT, TL072IDT, TL082ACDT).

Parameter Comparison

Part Number	Manufacturer	Product Status	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (µA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package
OP2177AR	Analog Devices	Obsolete	General Purpose	0.7	1.3	500	15	400	10	5	30	-40 to 125	8-SOIC
OP2177ARZ	Analog Devices	Active	General Purpose	0.7	1.3	500	15	400	10	5	30	-40 to 125	8-SOIC
ADA4077-2ARZ	Analog Devices	Active	General Purpose	1.2	3.6	400	15	400	10	5	30	-40 to 125	8-SOIC
ADA4177-2ARZ	Analog Devices	Active	General Purpose	1.5	3.5	300	2	500	25	5	36	-40 to 125	8-SOIC
LF253DT	STMicroelectronics	Active	J-FET	16	4	20	3000	1400	40	6	36	-40 to 105	8-SOIC
LF353DT	STMicroelectronics	Active	J-FET	16	4	20	3000	1400	40	6	36	0 to 70	8-SOIC
TL062CDT	STMicroelectronics	Active	J-FET	3.5	1	30	3000	200	20	6	36	0 to 70	8-SOIC
TL062IDT	STMicroelectronics	Active	J-FET	3.5	1	30	3000	200	20	6	36	-40 to 105	8-SOIC
TL072ACDT	STMicroelectronics	Active	J-FET	16	4	20	3000	1400	40	6	36	0 to 70	8-SOIC
TL072IDT	STMicroelectronics	Active	J-FET	16	4	20	3000	1400	40	6	36	-40 to 125	8-SOIC
TL082ACDT	STMicroelectronics	Active	J-FET	16	4	20	3000	1400	40	6	36	0 to 70	8-SOIC

Engineering Selection Recommendations

Primary Recommendation: OP2177ARZ

The OP2177ARZ is the direct equivalent of the OP2177AR, providing identical electrical performance and operating characteristics. This part is manufactured by Analog Devices Inc. and maintains active product status, ensuring long-term availability and supply chain stability. The OP2177ARZ is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. Selection of this part eliminates design modification requirements and maintains full compatibility with existing circuit implementations.

Secondary Recommendations: ADA4077-2ARZ and ADA4177-2ARZ

Both ADA4077-2ARZ and ADA4177-2ARZ are Analog Devices general-purpose amplifiers in 8-SOIC packages with active product status. These parts operate within the OP2177AR supply voltage range and temperature specifications. The ADA4077-2ARZ provides enhanced slew rate (1.2 V/µs) and gain bandwidth product (3.6 MHz) while maintaining the same supply current and output current specifications. The ADA4177-2ARZ offers rail-to-rail output capability, superior input offset voltage (2 µV), and increased output current (25 mA), with extended maximum supply voltage (36 V). Both parts are ROHS3 compliant and REACH unaffected.

Tertiary Recommendations: STMicroelectronics J-FET Amplifiers

STMicroelectronics J-FET amplifiers (LF253DT, LF353DT, TL062CDT, TL062IDT, TL072ACDT, TL072IDT, TL082ACDT) provide functional alternatives with 8-SOIC packaging and dual-channel configuration. These parts feature significantly lower input bias current (20-30 pA) compared to the OP2177AR (500 pA), making them suitable for high-impedance applications. However, J-FET amplifiers exhibit higher input offset voltage (3 mV) and increased supply current consumption (200-1400 µA). Selection of J-FET alternatives requires circuit evaluation to confirm compatibility with application requirements. TL072IDT and TL062IDT support the full OP2177AR operating temperature range (-40°C to 125°C). TL072ACDT and TL072IDT include AEC-Q100 automotive qualification.

Frequently Asked Questions (FAQ)

Q: Can the OP2177ARZ be used as a direct replacement for the OP2177AR?

A: Yes. The OP2177ARZ is electrically and functionally identical to the OP2177AR. Both parts share identical slew rate (0.7 V/µs), gain bandwidth product (1.3 MHz), input bias current (500 pA), input offset voltage (15 µV), supply current (400 µA), output current (10 mA), and operating temperature range (-40°C to 125°C). The primary difference is product status: OP2177ARZ is active while OP2177AR is obsolete. No circuit modifications are required.

Q: What is the difference between general-purpose amplifiers and J-FET amplifiers in this list?

A: General-purpose amplifiers (OP2177AR, OP2177ARZ, ADA4077-2ARZ, ADA4177-2ARZ) use bipolar input stages, resulting in higher input bias current (300-500 pA) but lower input offset voltage (2-15 µV). J-FET amplifiers (LF253DT, LF353DT, TL062CDT, TL062IDT, TL072ACDT, TL072IDT, TL082ACDT) use field-effect transistor input stages, providing extremely low input bias current (20-30 pA) but higher input offset voltage (3 mV). Selection depends on application requirements for input impedance and offset voltage performance.

Q: Are all substitute parts compatible with the 8-SOIC package footprint?

A: Yes. All substitute parts listed are configured in 8-SOIC (0.154", 3.90mm width) surface mount packages. Pin-to-pin compatibility exists across all parts, allowing direct PCB footprint reuse. However, electrical performance differences require circuit validation before implementation.

Q: Which substitute parts support the full operating temperature range of the OP2177AR (-40°C to 125°C)?

A: The following parts support the complete -40°C to 125°C operating temperature range: OP2177ARZ, ADA4077-2ARZ, ADA4177-2ARZ, LF253DT, TL062IDT, and TL072IDT. Parts with restricted temperature ranges (0°C to 70°C or -40°C to 105°C) require application-specific evaluation if full temperature coverage is required.

Q: What is the maximum supply voltage for each substitute part?

A: OP2177AR and OP2177ARZ support maximum supply voltage of 30 V. ADA4077-2ARZ also supports 30 V maximum. ADA4177-2ARZ, LF253DT, LF353DT, TL062CDT, TL062IDT, TL072ACDT, TL072IDT, and TL082ACDT all support 36 V maximum supply voltage. Circuit design must confirm compatibility with the selected part's supply voltage rating.

Q: Are there compliance or certification differences between substitute parts?

A: All substitute parts are ROHS3 compliant and REACH unaffected. TL072ACDT, TL072IDT, and TL082ACDT include AEC-Q100 automotive qualification, indicating suitability for automotive applications. Selection of automotive-qualified parts is required for automotive applications; other parts are suitable for industrial and commercial applications.

Q: What is the significance of the "Active" product status for substitute parts?

A: Active product status indicates that the manufacturer continues to produce and support the part, ensuring long-term availability, consistent quality, and ongoing technical support. The OP2177AR is obsolete, meaning the manufacturer has discontinued production. Substituting with active parts (OP2177ARZ, ADA4077-2ARZ, ADA4177-2ARZ, or STMicroelectronics J-FET amplifiers) provides supply chain security and reduces risk of future component unavailability.

Q: How do slew rate and gain bandwidth product affect circuit performance?

A: Slew rate determines the maximum rate of change of output voltage, affecting signal fidelity in high-frequency applications. Gain bandwidth product indicates the frequency at which amplifier gain equals unity, determining maximum usable bandwidth. The OP2177AR provides 0.7 V/µs slew rate and 1.3 MHz gain bandwidth product. Substitute parts with higher values (ADA4077-2ARZ: 1.2 V/µs and 3.6 MHz; J-FET amplifiers: 3.5-16 V/µs and 1-4 MHz) support higher-frequency signal processing. Applications requiring low-frequency operation accept lower values; high-frequency applications require higher values.

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