OP727AR Equivalent & Substitute Parts

Part Overview

The OP727AR is a general-purpose operational amplifier manufactured by Analog Devices Inc., featuring dual circuits in an 8-SOIC surface-mount package. This device delivers rail-to-rail output capability with a 700 kHz gain-bandwidth product and operates across a wide supply voltage range of 2.7 V to 30 V. The OP727AR is classified as obsolete, making identification of equivalent and substitute parts essential for design continuity and procurement planning. Substitute parts must maintain functional compatibility while meeting the electrical and mechanical requirements of the original specification.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Output Type	Rail-to-Rail	—
Slew Rate	0.2	V/µs
Gain Bandwidth Product	700	kHz
Current - Input Bias	5	nA
Voltage - Input Offset	30	µV
Current - Supply (per Channel)	235	µA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	30	V
Operating Temperature Range	-40 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the OP727AR are classified based on electrical parameter compatibility and physical packaging constraints. The primary substitution criteria are:

Direct Substitutes maintain identical or equivalent electrical specifications across all key parameters: dual-circuit configuration, rail-to-rail output, slew rate, gain-bandwidth product, input bias current, input offset voltage, supply current, output current capability, and supply voltage range. Direct substitutes must operate within the same temperature range and use the same 8-SOIC package footprint.

Similar Substitutes share the same package form factor and dual-circuit topology but exhibit different electrical performance characteristics. These parts may have higher slew rates, increased gain-bandwidth products, different input bias currents, or modified supply current specifications. Similar substitutes are suitable only when the application requirements permit deviation from the original electrical specifications.

The OP727AR is obsolete; therefore, active-status alternatives are prioritized for new designs and procurement continuity.

Parameter Comparison

Parameter	OP727AR (Main)	OP727ARZ (Direct)	OPA1662AIDRQ1 (Similar)
Manufacturer	Analog Devices Inc.	Analog Devices Inc.	Texas Instruments
Product Status	Obsolete	Active	Active
Amplifier Type	General Purpose	General Purpose	Audio
Number of Circuits	2	2	2
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	0.2	0.2	17
Gain Bandwidth Product (kHz)	700	700	22000
Current - Input Bias (nA)	5	5	600
Voltage - Input Offset (µV)	30	30	500
Current - Supply per Channel (µA)	235	235	1500
Current - Output / Channel (mA)	30	30	50
Voltage - Supply Span Min (V)	2.7	2.7	3
Voltage - Supply Span Max (V)	30	30	36
Operating Temperature (°C)	-40 to 85	-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)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)
Grade	—	—	Automotive
Qualification	—	—	AEC-Q100

Engineering Selection Recommendations

OP727ARZ (Direct Substitute)

The OP727ARZ is the primary substitute for the obsolete OP727AR. Both parts are manufactured by Analog Devices Inc. and share identical electrical specifications across all measured parameters: slew rate, gain-bandwidth product, input bias current, input offset voltage, supply current, output current, and supply voltage range. The OP727ARZ is classified as active product status, ensuring long-term availability and supply chain continuity. Both devices operate within the -40°C to 85°C temperature range and use the 8-SOIC package footprint. The OP727ARZ is ROHS3 compliant and maintains MSL 1 rating. The primary difference is packaging format: OP727AR uses standard packaging while OP727ARZ is supplied in tube format. This substitution requires no circuit redesign or application re-qualification.

OPA1662AIDRQ1 (Similar Substitute)

The OPA1662AIDRQ1 is a similar substitute manufactured by Texas Instruments, suitable for applications where electrical performance requirements differ from the original OP727AR specification. This device features significantly higher slew rate (17 V/µs versus 0.2 V/µs) and gain-bandwidth product (22 MHz versus 700 kHz), making it appropriate for higher-frequency signal processing. The OPA1662AIDRQ1 exhibits higher input bias current (600 nA versus 5 nA) and input offset voltage (500 µV versus 30 µV), which may impact precision analog applications. Supply current per channel is elevated at 1.5 mA compared to 235 µA, affecting power consumption in battery-operated designs. Output current capability is increased to 50 mA. The minimum supply voltage is 3 V (versus 2.7 V), and maximum supply voltage extends to 36 V. The OPA1662AIDRQ1 carries automotive-grade qualification (AEC-Q100) and ROHS3 compliance. MSL rating is 2 (1 Year). This substitution is appropriate only when application requirements accommodate the electrical parameter differences and automotive qualification is beneficial.

Frequently Asked Questions (FAQ)

Q: Can the OP727ARZ be used as a direct replacement for the OP727AR without circuit modification?

A: Yes. The OP727ARZ maintains identical electrical specifications and operates within the same temperature range using the same 8-SOIC package. No circuit redesign is required. The primary difference is packaging format (tube versus standard packaging).

Q: What are the key electrical differences between the OP727AR and OPA1662AIDRQ1?

A: The OPA1662AIDRQ1 exhibits higher slew rate (17 V/µs versus 0.2 V/µs), higher gain-bandwidth product (22 MHz versus 700 kHz), higher input bias current (600 nA versus 5 nA), higher input offset voltage (500 µV versus 30 µV), and higher supply current per channel (1.5 mA versus 235 µA). These differences make the OPA1662AIDRQ1 suitable for higher-frequency applications but less suitable for precision low-power designs.

Q: Is the OPA1662AIDRQ1 suitable for low-power applications?

A: The OPA1662AIDRQ1 is not optimal for low-power designs. Supply current per channel is 1.5 mA compared to 235 µA in the OP727AR, representing a 6.4× increase in power consumption. For battery-operated or power-constrained applications, the OP727ARZ direct substitute is recommended.

Q: What is the minimum supply voltage for each substitute?

A: The OP727AR and OP727ARZ both operate at a minimum supply voltage of 2.7 V. The OPA1662AIDRQ1 requires a minimum supply voltage of 3 V, which may limit its use in ultra-low-voltage applications.

Q: Are both substitutes RoHS compliant?

A: Yes. Both the OP727ARZ and OPA1662AIDRQ1 are ROHS3 compliant. The original OP727AR does not specify RoHS status.

Q: What is the moisture sensitivity level (MSL) difference between the substitutes?

A: The OP727ARZ maintains MSL 1 (Unlimited), identical to the original OP727AR. The OPA1662AIDRQ1 has MSL 2 (1 Year), requiring more stringent moisture control during storage and handling.

Q: Does the OPA1662AIDRQ1 carry automotive qualification?

A: Yes. The OPA1662AIDRQ1 is AEC-Q100 qualified and carries automotive-grade designation. This qualification is not specified for the OP727AR or OP727ARZ.

Q: Can the OPA1662AIDRQ1 be used in precision analog applications requiring low input offset voltage?

A: The OPA1662AIDRQ1 is not recommended for precision applications requiring low input offset voltage. Its 500 µV input offset voltage is 16.7× higher than the OP727AR specification of 30 µV. For precision applications, the OP727ARZ direct substitute is appropriate.

Q: Are all three parts available in the same 8-SOIC package footprint?

A: Yes. All three parts use the 8-SOIC package with 0.154" (3.90 mm) width, ensuring identical PCB footprint compatibility.

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