OPA2228P Equivalent & Substitute Parts

Part Overview

The OPA2228P is a general-purpose operational amplifier manufactured by Texas Instruments, featuring two independent circuits in an 8-PDIP through-hole package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The OPA2228P delivers a gain-bandwidth product of 33 MHz with a slew rate of 11 V/µs, suitable for general-purpose amplification applications requiring moderate bandwidth and low input offset voltage specifications.

Identifying equivalent and substitute parts is necessary due to the Last Time Buy status of the OPA2228P. Alternative components with compatible electrical and mechanical parameters ensure design continuity and long-term supply chain reliability.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Slew Rate	11	V/µs
Gain Bandwidth Product	33	MHz
Current - Input Bias	2.5	nA
Voltage - Input Offset	5	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	-40 to 85	°C
Package / Case	8-DIP (0.300", 7.62mm)	—
Mounting Type	Through Hole	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the OPA2228P is determined by strict alignment of the following critical parameters:

Electrical Compatibility Criteria:

Amplifier Type: General Purpose
Number of Circuits: 2
Slew Rate: 11 V/µs (minimum acceptable)
Gain Bandwidth Product: 33 MHz (minimum acceptable)
Current - Input Bias: ≤ 2.5 nA
Voltage - Input Offset: ≤ 5 µV
Current - Supply: ≤ 3.7 mA (x2 Channels)
Current - Output / Channel: ≥ 45 mA
Voltage - Supply Span: 5 V to 36 V (minimum overlap required)
Operating Temperature: -40°C to 85°C

Mechanical Compatibility Criteria:

Package / Case: 8-DIP or equivalent surface-mount alternative (8-SOIC)
Mounting Type: Through Hole or Surface Mount

Compliance Criteria:

RoHS3 Compliant
REACH Unaffected

Substitute parts are grouped into two categories: direct package equivalents (8-PDIP through-hole) and alternative package options (8-SOIC surface-mount) that maintain electrical performance within specified tolerances.

Parameter Comparison

Parameter	OPA2228P	OPA2228U/2K5	LT1126ACN8	MUSES8820D
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc.	Nisshinbo Micro Devices Inc.
Amplifier Type	General Purpose	General Purpose	General Purpose	Audio
Number of Circuits	2	2	2	2
Slew Rate (V/µs)	11	11	11	5
Gain Bandwidth Product (MHz)	33	33	65	11
Current - Input Bias (nA)	2.5	2.5	7	100
Voltage - Input Offset (µV)	5	5	20	300
Current - Supply (mA, x2 Channels)	3.7	3.7	2.6	8
Current - Output / Channel (mA)	45	45	—	50
Voltage - Supply Span (Min, V)	5	5	8	7
Voltage - Supply Span (Max, V)	36	36	36	32
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Package / Case	8-DIP (0.300", 7.62mm)	8-SOIC (0.154", 3.90mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Surface Mount	Through Hole	Through Hole
Product Status	Last Time Buy	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant

Engineering Selection Recommendations

OPA2228U/2K5 (Texas Instruments)

The OPA2228U/2K5 is the manufacturer-recommended direct electrical equivalent of the OPA2228P. It maintains identical electrical specifications including slew rate (11 V/µs), gain-bandwidth product (33 MHz), input bias current (2.5 nA), and input offset voltage (5 µV). The primary difference is packaging: OPA2228U/2K5 uses 8-SOIC surface-mount configuration versus the through-hole 8-PDIP of the OPA2228P. Both devices are ROHS3 Compliant and REACH Unaffected. The OPA2228U/2K5 carries Active product status with higher inventory availability (2570 Pcs), making it suitable for new designs or redesigns accommodating surface-mount assembly.

LT1126ACN8 (Analog Devices Inc.)

The LT1126ACN8 is an alternative general-purpose dual operational amplifier in 8-PDIP through-hole package, maintaining direct mechanical compatibility with the OPA2228P. It exceeds OPA2228P electrical performance in gain-bandwidth product (65 MHz versus 33 MHz) and offers lower supply current (2.6 mA versus 3.7 mA). However, it exhibits higher input bias current (7 nA versus 2.5 nA) and input offset voltage (20 µV versus 5 µV). The LT1126ACN8 requires minimum supply voltage of 8 V, compared to 5 V for the OPA2228P, which may impact designs with lower supply rails. This device is ROHS3 Compliant with Active product status and MSL 1 rating.

MUSES8820D (Nisshinbo Micro Devices Inc.)

The MUSES8820D is classified as an audio amplifier rather than general-purpose, featuring 8-DIP through-hole packaging identical to the OPA2228P. While it maintains the same operating temperature range and dual-circuit configuration, it exhibits significantly degraded electrical performance: slew rate of 5 V/µs (versus 11 V/µs), gain-bandwidth product of 11 MHz (versus 33 MHz), input bias current of 100 nA (versus 2.5 nA), and input offset voltage of 300 µV (versus 5 µV). The MUSES8820D is suitable only for audio-specific applications where these performance reductions are acceptable. It is RoHS Compliant with Active product status.

Frequently Asked Questions (FAQ)

Q: Can OPA2228U/2K5 be used as a direct replacement for OPA2228P in existing through-hole PCB designs?

A: No. The OPA2228U/2K5 uses 8-SOIC surface-mount packaging, which is incompatible with through-hole PCB footprints designed for 8-PDIP. PCB redesign or adapter solutions are required. For through-hole compatibility, use LT1126ACN8 or MUSES8820D.

Q: What are the key electrical differences between OPA2228P and LT1126ACN8?

A: The LT1126ACN8 offers higher gain-bandwidth product (65 MHz versus 33 MHz) and lower supply current (2.6 mA versus 3.7 mA). However, it has higher input bias current (7 nA versus 2.5 nA), higher input offset voltage (20 µV versus 5 µV), and requires minimum 8 V supply voltage versus 5 V for the OPA2228P. Verify these differences against application requirements before substitution.

Q: Is MUSES8820D suitable for general-purpose amplification applications?

A: MUSES8820D is classified as an audio amplifier and exhibits significantly lower bandwidth (11 MHz versus 33 MHz) and higher input offset voltage (300 µV versus 5 µV) compared to OPA2228P. It is not recommended for general-purpose applications requiring the electrical performance of the OPA2228P. Use only in audio-specific designs where these specifications are acceptable.

Q: Are all substitute parts RoHS3 compliant?

A: OPA2228P, OPA2228U/2K5, and LT1126ACN8 are ROHS3 Compliant. MUSES8820D is RoHS Compliant but not specifically ROHS3 certified. Verify compliance requirements for your application before selection.

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

A: OPA2228P and OPA2228U/2K5 require minimum 5 V supply. LT1126ACN8 requires minimum 8 V supply. MUSES8820D requires minimum 7 V supply. Designs operating below 8 V cannot use LT1126ACN8.

Q: Which substitute offers the best inventory availability?

A: OPA2228U/2K5 has the highest inventory (2570 Pcs), followed by MUSES8820D (2945 Pcs) and LT1126ACN8 (1120 Pcs). OPA2228P is Last Time Buy with limited stock (1330 Pcs).

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