OP270GP Equivalent & Substitute Parts

Part Overview

The OP270GP is a general-purpose operational amplifier manufactured by Analog Devices Inc., configured as a dual-circuit (2-channel) device in an 8-DIP through-hole package. This component is classified as obsolete, indicating it is no longer in active production. The OP270GP delivers a gain-bandwidth product of 5 MHz with a slew rate of 2.4 V/µs, making it suitable for general-purpose analog signal processing applications requiring moderate bandwidth and speed characteristics.

Due to its obsolete status, sourcing new units from original manufacturing channels is limited. Equivalent and substitute parts are necessary to maintain design continuity, support legacy system repairs, and enable new designs requiring similar electrical performance within the 8-DIP package form factor.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	Channels
Slew Rate	2.4	V/µs
Gain Bandwidth Product	5	MHz
Current - Input Bias	15	nA
Voltage - Input Offset	50	µV
Current - Supply	4	mA
Voltage - Supply Span (Min)	9	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	−40 to 85	°C
Mounting Type	Through Hole	—
Package / Case	8-DIP (0.300", 7.62 mm)	—

Substitute Part Grouping Explanation

Substitution of the OP270GP is determined by electrical and mechanical compatibility across the following critical parameters:

Mechanical Compatibility: All substitute parts must use the 8-DIP (0.300", 7.62 mm) through-hole package to ensure direct socket compatibility without PCB redesign.

Functional Compatibility: All substitute parts must provide dual-circuit (2-channel) operational amplifier functionality to maintain circuit topology and pin assignments.

Electrical Compatibility: Substitute parts must operate within the supply voltage range of 9 V to 36 V (minimum) to ensure compatibility with existing power distribution. The slew rate, gain-bandwidth product, input bias current, and input offset voltage define the performance envelope. Parts with equal or superior performance in these parameters are electrically compatible.

Direct Equivalent: OP270GPZ is the direct equivalent, manufactured by Analog Devices Inc., with identical electrical specifications and active product status.

Similar Substitutes: NJM4565D, NJM4558D, OPA2227P, and MUSES8820D are functionally similar parts that meet the mechanical and basic electrical requirements but exhibit variations in performance characteristics. These parts are suitable for applications where the performance envelope of the OP270GP is acceptable or where enhanced performance is beneficial.

Parameter Comparison

Parameter	OP270GP	OP270GPZ	NJM4565D	NJM4558D	OPA2227P	MUSES8820D
Manufacturer	Analog Devices	Analog Devices	Nisshinbo Micro	Nisshinbo Micro	Texas Instruments	Nisshinbo Micro
Product Status	Obsolete	Active	Active	Not For New Designs	Last Time Buy	Active
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	Audio
Number of Circuits	2	2	2	2	2	2
Slew Rate (V/µs)	2.4	2.4	4	1	2.3	5
Gain Bandwidth Product (MHz)	5	5	10	3	8	11
Current - Input Bias (nA)	15	15	50	25	2.5	100
Voltage - Input Offset (µV)	50	50	500	500	5	300
Current - Supply (mA)	4	4	4.5	3.5	3.7	8
Voltage - Supply Span Min (V)	9	9	8	8	5	7
Voltage - Supply Span Max (V)	36	36	36	36	36	32
Operating Temperature (°C)	−40 to 85	−40 to 85	−40 to 85	−40 to 85	−40 to 85	−40 to 85
Package / Case	8-DIP (0.300", 7.62 mm)	8-DIP (0.300", 7.62 mm)	8-DIP (0.300", 7.62 mm)	8-DIP (0.300", 7.62 mm)	8-DIP (0.300", 7.62 mm)	8-DIP (0.300", 7.62 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	Not Specified	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	RoHS Compliant

Engineering Selection Recommendations

Primary Recommendation: OP270GPZ

OP270GPZ is the direct equivalent of OP270GP, manufactured by Analog Devices Inc. with identical electrical specifications and mechanical packaging. OP270GPZ holds active product status, ensuring continued availability and supply chain reliability. This part is ROHS3 compliant and carries REACH unaffected certification. OP270GPZ is the preferred choice for direct replacement in existing designs and legacy system support.

Secondary Recommendation: NJM4565D

NJM4565D is manufactured by Nisshinbo Micro Devices Inc. and holds active product status. This part provides enhanced performance with a slew rate of 4 V/µs (versus 2.4 V/µs) and a gain-bandwidth product of 10 MHz (versus 5 MHz), while maintaining compatibility with the 9 V to 36 V supply range. NJM4565D is RoHS compliant and REACH unaffected. The higher input bias current (50 nA versus 15 nA) and input offset voltage (500 µV versus 50 µV) represent trade-offs that are acceptable in general-purpose applications where precision is not critical.

Tertiary Recommendation: OPA2227P

OPA2227P is manufactured by Texas Instruments and carries last-time-buy product status. This part offers superior performance characteristics, including exceptionally low input bias current (2.5 nA) and input offset voltage (5 µV), with a gain-bandwidth product of 8 MHz. OPA2227P operates across a lower minimum supply voltage (5 V versus 9 V), providing greater flexibility in power supply design. ROHS3 compliance and REACH unaffected status are confirmed. The lower supply voltage minimum and superior input characteristics make this part suitable for precision applications, though last-time-buy status indicates limited future availability.

Not Recommended for New Designs: NJM4558D

NJM4558D carries a "Not For New Designs" product status, indicating manufacturer discontinuation intent. While electrically compatible, this part exhibits degraded performance (1 V/µs slew rate, 3 MHz gain-bandwidth product) compared to the OP270GP and is not suitable for new design implementations.

Application-Specific Alternative: MUSES8820D

MUSES8820D is classified as an audio amplifier rather than a general-purpose amplifier. This part provides enhanced slew rate (5 V/µs) and gain-bandwidth product (11 MHz) but operates at a maximum supply voltage of 32 V (versus 36 V) and exhibits higher supply current (8 mA versus 4 mA). MUSES8820D is suitable only for applications where audio-grade performance is required and the 32 V maximum supply voltage is acceptable.

Frequently Asked Questions (FAQ)

Q: Can OP270GPZ be used as a direct replacement for OP270GP without circuit modification?

A: Yes. OP270GPZ is manufactured by Analog Devices Inc. with identical electrical specifications, pin configuration, and 8-DIP package dimensions. Direct socket substitution is possible without circuit redesign or component value adjustment.

Q: What is the primary reason to select NJM4565D over OP270GPZ?

A: NJM4565D provides enhanced performance with a slew rate of 4 V/µs and gain-bandwidth product of 10 MHz, compared to 2.4 V/µs and 5 MHz for OP270GP/OP270GPZ. Selection depends on application bandwidth requirements. For applications requiring higher speed performance within the same package and supply voltage range, NJM4565D is appropriate.

Q: Why is NJM4558D listed as a substitute if it carries "Not For New Designs" status?

A: NJM4558D is electrically and mechanically compatible with OP270GP and is included for reference in legacy system repair scenarios where existing inventory may be available. However, it is not recommended for new design implementations due to manufacturer discontinuation intent and degraded performance characteristics.

Q: Does OPA2227P require different power supply design compared to OP270GP?

A: OPA2227P operates at a minimum supply voltage of 5 V, compared to 9 V for OP270GP. This allows OPA2227P to function in lower-voltage applications. The maximum supply voltage of 36 V is identical. Existing designs operating at 9 V or higher are compatible without power supply modification.

Q: Are all substitute parts RoHS compliant?

A: OP270GPZ and OPA2227P are ROHS3 compliant. NJM4565D, NJM4558D, and MUSES8820D are RoHS compliant. All parts carry REACH unaffected certification. Compliance status should be verified against specific procurement requirements.

Q: What is the impact of higher input bias current in NJM4565D compared to OP270GP?

A: NJM4565D exhibits input bias current of 50 nA versus 15 nA for OP270GP. In general-purpose applications with moderate impedance levels, this difference is typically negligible. In high-impedance circuits (>1 MΩ), the higher bias current may introduce measurable offset voltage across the input impedance. Circuit analysis is required for precision applications.

Q: Can MUSES8820D be used in general-purpose applications, or is it limited to audio?

A: MUSES8820D is classified as an audio amplifier and exhibits performance characteristics optimized for audio-frequency applications. While electrically compatible in the 8-DIP package, it is not recommended for general-purpose applications outside the audio frequency range. The maximum supply voltage of 32 V also limits compatibility with designs requiring the full 36 V range.

Q: What is the significance of "Last Time Buy" status for OPA2227P?

A: Last-time-buy status indicates that Texas Instruments has announced a final production run with a specified cutoff date. After this date, OPA2227P will no longer be manufactured or available through normal distribution channels. Designs utilizing OPA2227P should plan for transition to alternative parts or secure inventory before the last-time-buy deadline.

Q: Are there pin-to-pin compatibility differences between substitute parts?

A: All substitute parts maintain the standard 8-DIP dual operational amplifier pinout configuration. Pin-to-pin compatibility is preserved across all listed substitutes, enabling direct socket replacement without PCB modification.

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