OPA2227UAE4 Equivalent & Substitute Parts

Part Overview

The OPA2227UAE4 is a general-purpose operational amplifier featuring two circuits in an 8-SOIC surface mount package, manufactured by Texas Instruments. This device is classified as obsolete product status, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. The OPA2227UAE4 operates across a wide supply voltage range of 5V to 36V with low input bias current of 2.5 nA and input offset voltage of 10 µV, making it suitable for precision analog signal conditioning applications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Slew Rate	2.3	V/µs
Gain Bandwidth Product	8	MHz
Current - Input Bias	2.5	nA
Voltage - Input Offset	10	µV
Current - Supply (x2 Channels)	3.7	mA
Current - Output / Channel	45	mA
Voltage - Supply Span (Min)	5	V
Voltage - Supply Span (Max)	36	V
Operating Temperature Range	-40 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the OPA2227UAE4 is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Critical Parameters for Substitution:

Package type: 8-SOIC surface mount configuration
Number of circuits: 2 operational amplifiers per package
Supply voltage range compatibility: minimum 5V, maximum 36V
Input bias current: 2.5 nA baseline
Input offset voltage: 10 µV baseline
Slew rate: 2.3 V/µs baseline
Gain bandwidth product: 8 MHz baseline
Output current per channel: 45 mA baseline
Operating temperature range: -40°C to 85°C baseline

Substitute parts are grouped into two categories based on product status and parameter alignment:

Category 1: Direct Replacement (Active Status, Identical Parameters) OPA2227UA represents the active production equivalent with identical electrical specifications and packaging. This part maintains all critical parameters of the obsolete OPA2227UAE4 while offering improved moisture sensitivity rating (MSL 2 versus MSL 3) and active product support.

Category 2: Functional Equivalents (Active Status, Parameter Variations) Parts including ADA4004-2ARZ, ADA4004-2ARZ-R7, ADA4004-2ARZ-RL, LM833DT, LT1492CS8#PBF, LT1492CS8#TRPBF, MC33077DR2G, OP285GSZ, and OP285GSZ-REEL provide functional substitution with variations in slew rate, gain bandwidth product, input bias current, and input offset voltage. These parts maintain 8-SOIC packaging and dual-circuit configuration but operate within different electrical performance envelopes.

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (µV)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package
OPA2227UAE4	Texas Instruments	Obsolete	2.3	8	2.5	10	5	36	-40 to 85	8-SOIC
OPA2227UA	Texas Instruments	Active	2.3	8	2.5	10	5	36	-40 to 85	8-SOIC
ADA4004-2ARZ	Analog Devices Inc.	Active	2.7	12	40	40	10	30	-40 to 125	8-SOIC
ADA4004-2ARZ-R7	Analog Devices Inc.	Active	2.7	12	40	40	10	30	-40 to 125	8-SOIC
ADA4004-2ARZ-RL	Analog Devices Inc.	Active	2.7	12	40	40	10	30	-40 to 125	8-SOIC
LM833DT	STMicroelectronics	Active	7	15	300	300	5	30	-40 to 105	8-SOIC
LT1492CS8#PBF	Analog Devices Inc.	Active	3	5	50	120	2.5	36	0 to 70	8-SOIC
LT1492CS8#TRPBF	Analog Devices Inc.	Active	3	5	50	120	2.5	36	0 to 70	8-SOIC
MC33077DR2G	onsemi	Active	11	37	280	130	5	36	-40 to 85	8-SOIC
OP285GSZ	Analog Devices Inc.	Active	22	9	100	35	9	44	-40 to 85	8-SOIC
OP285GSZ-REEL	Analog Devices Inc.	Active	22	9	100	35	9	44	-40 to 85	8-SOIC

Engineering Selection Recommendations

Primary Recommendation: OPA2227UA

The OPA2227UA is the recommended direct replacement for the obsolete OPA2227UAE4. This part maintains identical electrical specifications including 2.3 V/µs slew rate, 8 MHz gain bandwidth product, 2.5 nA input bias current, and 10 µV input offset voltage. The OPA2227UA carries active product status with full manufacturer support and improved moisture sensitivity rating (MSL 2 with 1-year shelf life versus MSL 3 with 168-hour shelf life). Both parts are ROHS3 compliant and carry identical REACH and ECCN classifications. Packaging options include tube and tape & reel configurations to match production requirements.

Secondary Recommendations Based on Application Requirements:

For applications requiring extended temperature operation beyond 85°C, the ADA4004-2ARZ series (available in tube, cut tape, and tape & reel packaging) extends the operating range to 125°C. These parts maintain 8-SOIC packaging and dual-circuit configuration with active product status. Supply voltage range is reduced to 10V minimum and 30V maximum, requiring verification against system requirements.

For applications requiring higher slew rate performance, the MC33077DR2G provides 11 V/µs slew rate and 37 MHz gain bandwidth product while maintaining 5V to 36V supply range and -40°C to 85°C operating temperature. This part is available in tape & reel packaging with active product status.

For applications with lower supply voltage requirements (2.5V minimum), the LT1492CS8#PBF and LT1492CS8#TRPBF series provide extended low-voltage operation while maintaining 36V maximum supply capability. These parts feature 3 V/µs slew rate and 5 MHz gain bandwidth product with active product status.

All recommended substitutes maintain ROHS3 compliance, surface mount 8-SOIC packaging, and dual operational amplifier configuration. Selection should be based on specific application requirements for supply voltage range, operating temperature, slew rate, and gain bandwidth product.

Frequently Asked Questions (FAQ)

Q: Can OPA2227UA be used as a direct replacement for OPA2227UAE4 without circuit modification?

A: Yes. The OPA2227UA maintains identical electrical specifications including slew rate (2.3 V/µs), gain bandwidth product (8 MHz), input bias current (2.5 nA), input offset voltage (10 µV), supply voltage range (5V to 36V), and operating temperature range (-40°C to 85°C). Both parts use 8-SOIC surface mount packaging. No circuit modification is required for direct substitution.

Q: What is the difference between ADA4004-2ARZ, ADA4004-2ARZ-R7, and ADA4004-2ARZ-RL?

A: These three part numbers represent the same ADA4004 base device with different packaging configurations. ADA4004-2ARZ is supplied in tube packaging. ADA4004-2ARZ-R7 is supplied in cut tape and Digi-Reel format. ADA4004-2ARZ-RL is supplied in tape & reel format. All three variants maintain identical electrical specifications and 8-SOIC package dimensions. Selection depends on production equipment compatibility and supply chain requirements.

Q: Why does the ADA4004-2ARZ have higher input bias current (40 nA) compared to OPA2227UAE4 (2.5 nA)?

A: The ADA4004-2ARZ uses a different amplifier architecture (iPolar series) optimized for extended temperature range (-40°C to 125°C) and improved slew rate (2.7 V/µs versus 2.3 V/µs). This architecture results in higher input bias current. Applications sensitive to input bias current should verify compatibility before substitution.

Q: Can LT1492CS8#TRPBF be used in applications requiring -40°C operation?

A: No. The LT1492CS8#TRPBF operating temperature range is 0°C to 70°C, which does not include -40°C operation. The OPA2227UA or MC33077DR2G should be selected for applications requiring -40°C minimum operating temperature.

Q: What is the significance of the supply voltage range differences between substitute parts?

A: Supply voltage range determines circuit compatibility. The OPA2227UAE4 operates from 5V to 36V. The ADA4004 series operates from 10V to 30V, requiring verification that system supply voltages fall within this narrower range. The LT1492 series operates from 2.5V to 36V, providing extended low-voltage capability. The OP285 series operates from 9V to 44V, providing extended high-voltage capability. Selection must match system power supply specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance status, matching the compliance profile of the OPA2227UAE4. All parts are also REACH unaffected and carry EAR99 ECCN classification.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: tube (standard packaging for manual assembly), cut tape with Digi-Reel (for semi-automated equipment), and tape & reel (for fully automated pick-and-place assembly). Selection depends on production equipment capabilities and supply chain logistics. All parts maintain identical 8-SOIC (0.154", 3.90mm width) physical dimensions.

Q: Which substitute part provides the best performance upgrade from OPA2227UAE4?

A: The MC33077DR2G provides significant performance improvements with 11 V/µs slew rate (versus 2.3 V/µs) and 37 MHz gain bandwidth product (versus 8 MHz), while maintaining identical 5V to 36V supply range and -40°C to 85°C operating temperature. This part is suitable for applications requiring higher-speed signal processing. However, input bias current increases to 280 nA and input offset voltage increases to 130 µV, requiring verification for precision applications.

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