OPA2365AIDR Equivalent & Substitute Parts

Part Overview

The OPA2365AIDR is a CMOS dual-channel operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device features rail-to-rail output capability and is designed for applications requiring low input bias current and precision signal conditioning. The part is currently in active production status with 15,972 units in stock. Substitute parts are identified when equivalent functional performance can be achieved within the specified electrical and mechanical parameters while maintaining compatibility with the 8-SOIC package form factor and surface mount assembly requirements.

Key Parameters

Parameter	OPA2365AIDR	Unit
Amplifier Type	CMOS	—
Number of Circuits	2	—
Output Type	Rail-to-Rail	—
Slew Rate	25	V/µs
Gain Bandwidth Product	50	MHz
Current - Input Bias	0.2	pA
Voltage - Input Offset	100	µV
Current - Supply (x2 Channels)	4.6	mA
Current - Output / Channel	65	mA
Voltage - Supply Span (Min)	2.2	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 125	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the OPA2365AIDR are identified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

Package compatibility: 8-SOIC (0.154", 3.90mm Width) surface mount only
Dual-channel configuration (2 circuits)
Rail-to-rail output capability
Operating temperature range: -40°C to 125°C minimum
Supply voltage span: minimum 2.2V to 5.5V maximum
RoHS3 compliance and MSL 1 rating

Secondary Performance Parameters:

Slew rate ≥ 25 V/µs (high-speed applications)
Gain bandwidth product ≥ 50 MHz (bandwidth-critical circuits)
Input bias current ≤ 0.2 pA (precision measurement applications)
Output current per channel ≥ 65 mA (load-driving capability)

Substitute parts are grouped into two categories: Direct CMOS Equivalents (matching amplifier type and performance tier) and General Purpose Alternatives (meeting package and basic functional requirements with different performance characteristics).

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Output Current/Ch (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Packaging
OPA2365AIDR	Texas Instruments	CMOS	25	50	0.2	65	2.2	5.5	-40 to 125	Cut Tape & Digi-Reel
AD8656ARZ	Analog Devices Inc.	CMOS	11	28	1	220	2.7	5.5	-40 to 125	Tube
AD8656ARZ-REEL	Analog Devices Inc.	CMOS	11	28	1	220	2.7	5.5	-40 to 125	Cut Tape & Digi-Reel
AD8656ARZ-REEL7	Analog Devices Inc.	CMOS	11	28	1	220	2.7	5.5	-40 to 125	Cut Tape & Digi-Reel
LMV358IDT	STMicroelectronics	General Purpose	0.45	1.3	16000	160	2.7	6	-40 to 125	Cut Tape & Digi-Reel
LMV358IYDT	STMicroelectronics	General Purpose	0.45	1.3	16000	160	2.7	6	-40 to 125	Cut Tape & Digi-Reel
MAX4128ESA+	Analog Devices Inc./Maxim Integrated	General Purpose	10	25	50	50	2.7	6.5	-40 to 85	Tube
MAX4489ASA+	Analog Devices Inc./Maxim Integrated	General Purpose	10	42	1	48	2.7	5.5	-40 to 125	Tube
MAX4489ASA+T	Analog Devices Inc./Maxim Integrated	General Purpose	10	42	1	48	2.7	5.5	-40 to 125	Tape & Reel
MC33077DR2G	onsemi	General Purpose	11	37	280	33	5	36	-40 to 85	Tape & Reel
MCP6022-E/SN	Microchip Technology	General Purpose	7	10	1	30	2.5	5.5	-40 to 125	Tube

Engineering Selection Recommendations

Direct CMOS Substitutes (Preferred Category):

The AD8656ARZ series (AD8656ARZ, AD8656ARZ-REEL, AD8656ARZ-REEL7) from Analog Devices Inc. represents the closest functional equivalent to the OPA2365AIDR. All three variants employ CMOS amplifier architecture with dual-channel configuration, rail-to-rail output, and identical operating temperature range (-40°C to 125°C). The AD8656ARZ-REEL and AD8656ARZ-REEL7 variants are packaged in Cut Tape & Digi-Reel format, matching the OPA2365AIDR packaging specification. All AD8656 variants maintain RoHS3 compliance and MSL 1 rating. The primary performance trade-off is reduced slew rate (11 V/µs versus 25 V/µs) and lower gain bandwidth product (28 MHz versus 50 MHz), offset by superior output current capability (220 mA per channel versus 65 mA). Selection among AD8656 variants depends on procurement format requirements: AD8656ARZ-REEL7 offers the highest inventory availability (23,300 units).

General Purpose Alternatives (Secondary Category):

When CMOS-specific performance is not required, general purpose amplifiers provide functional substitution with trade-offs in specific parameters:

LMV358IDT and LMV358IYDT (STMicroelectronics): Maintain full temperature range (-40°C to 125°C), rail-to-rail output, and Cut Tape & Digi-Reel packaging. LMV358IYDT includes AEC-Q100 automotive qualification. These parts sacrifice bandwidth (1.3 MHz GBW) and slew rate (0.45 V/µs) but offer significantly lower supply current (162 µA total). Suitable for low-frequency, low-power applications.
MAX4489ASA+ and MAX4489ASA+T (Analog Devices Inc./Maxim Integrated): Provide push-pull rail-to-rail output with 42 MHz gain bandwidth product and 10 V/µs slew rate, approaching OPA2365AIDR performance. Full temperature range support (-40°C to 125°C) and 2.7V to 5.5V supply span. Output current per channel (48 mA) is lower than OPA2365AIDR. MAX4489ASA+T is packaged in Tape & Reel format.
MAX4128ESA+ (Analog Devices Inc./Maxim Integrated): Offers 25 MHz gain bandwidth product and 10 V/µs slew rate with extended supply range (2.7V to 6.5V). Operating temperature limited to -40°C to 85°C. Suitable for applications not requiring full 125°C operation.
MC33077DR2G (onsemi): Provides 37 MHz gain bandwidth product and 11 V/µs slew rate. Supply voltage range (5V to 36V) is incompatible with OPA2365AIDR applications requiring 2.2V minimum. Operating temperature limited to -40°C to 85°C. Output current per channel (33 mA) is below OPA2365AIDR specification.
MCP6022-E/SN (Microchip Technology): Rail-to-rail output with 1 pA input bias current and full temperature range (-40°C to 125°C). Reduced bandwidth (10 MHz GBW) and slew rate (7 V/µs) limit applicability to low-frequency circuits. Output current per channel (30 mA) is insufficient for high-load applications.

Selection Criteria Summary:

Choose AD8656ARZ-REEL7 for direct CMOS replacement with matching package format and maximum inventory availability. Select LMV358 variants for low-power, low-frequency applications with automotive requirements (LMV358IYDT). Choose MAX4489ASA+ for bandwidth-critical applications requiring push-pull output. Avoid MC33077DR2G for applications requiring 2.2V minimum supply voltage or 125°C operation.

Frequently Asked Questions (FAQ)

Q: Can the AD8656ARZ replace the OPA2365AIDR in all applications?

A: The AD8656ARZ provides functional substitution in applications where the reduced slew rate (11 V/µs versus 25 V/µs) and lower gain bandwidth product (28 MHz versus 50 MHz) are acceptable. The superior output current capability (220 mA per channel) may enable higher load-driving capacity. Applications requiring the full 25 V/µs slew rate or 50 MHz bandwidth should not use AD8656ARZ as a substitute.

Q: What is the packaging difference between AD8656ARZ and AD8656ARZ-REEL?

A: AD8656ARZ is supplied in Tube packaging, while AD8656ARZ-REEL and AD8656ARZ-REEL7 are supplied in Cut Tape & Digi-Reel format. The electrical specifications are identical. Choose based on assembly line requirements: Tube packaging for manual or small-batch assembly; Cut Tape & Digi-Reel for automated pick-and-place equipment.

Q: Why does the LMV358 have such high input bias current compared to OPA2365AIDR?

A: The LMV358 is a general purpose amplifier with 16 nanoampere (16,000 pA) input bias current, compared to the OPA2365AIDR's 0.2 pA. This difference reflects the LMV358's bipolar input stage design versus the OPA2365AIDR's CMOS input stage. Applications sensitive to input bias current (precision transimpedance amplifiers, high-impedance sensors) require the OPA2365AIDR or similar CMOS-input devices.

Q: Is the MC33077DR2G compatible with 2.2V supply voltage applications?

A: No. The MC33077DR2G requires a minimum supply voltage of 5V, making it incompatible with the OPA2365AIDR's 2.2V minimum specification. Do not use MC33077DR2G in applications requiring operation below 5V supply voltage.

Q: Can I use MAX4128ESA+ in applications operating at 125°C?

A: No. The MAX4128ESA+ is rated for -40°C to 85°C operating temperature. Applications requiring 125°C operation must use parts with full temperature range specification, such as OPA2365AIDR, AD8656ARZ variants, LMV358 variants, or MAX4489ASA+ series.

Q: What is the significance of RoHS3 compliance and MSL 1 rating?

A: RoHS3 compliance indicates the part meets European Union Restriction of Hazardous Substances directive requirements, restricting lead and other hazardous materials. MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture-control packaging, simplifying storage and handling. All listed substitute parts maintain both RoHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage practices.

Q: Which substitute part offers the best output current capability?

A: The AD8656ARZ series provides 220 mA output current per channel, significantly exceeding the OPA2365AIDR's 65 mA specification. This enhanced capability enables driving higher-impedance loads or multiple stages without additional buffering.

Q: Are there automotive-qualified alternatives to OPA2365AIDR?

A: Yes. The LMV358IYDT is qualified to AEC-Q100 automotive standards while maintaining the full -40°C to 125°C temperature range and Cut Tape & Digi-Reel packaging. However, it sacrifices bandwidth and slew rate performance compared to OPA2365AIDR.

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