OPA2228U Equivalent & Substitute Parts

Part Overview

The OPA2228U is a general purpose operational amplifier manufactured by Texas Instruments, configured as a dual-channel integrated circuit in 8-SOIC surface mount packaging. This device is classified as Active product status and is RoHS3 compliant. The OPA2228U serves applications requiring low input offset voltage, low input bias current, and moderate bandwidth performance in compact form factors. Substitute parts are identified when inventory constraints, lead time requirements, or specific application parameters necessitate alternative sourcing while maintaining functional compatibility.

Substiute Parts

OPA2228U

Texas InstrumentsIn Stock: 1173OPA2228U Datasheet

Current PartRFQ

LM833DT

STMicroelectronicsIn Stock: 166636LM833DT Datasheet

MFR RecommendedRFQ

MC33077DR2G

onsemiIn Stock: 7216MC33077DR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the OPA2228U are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Mechanical Compatibility: All substitute parts must use 8-SOIC surface mount packaging with 0.154" (3.90mm) width to ensure PCB footprint compatibility without layout redesign.

Electrical Compatibility: Substitute parts must operate within the OPA2228U supply voltage range (5V to 36V minimum and maximum spans) and maintain dual-channel configuration (2 circuits). The operating temperature range must encompass or match the -40°C to 85°C specification.

Functional Classification: Substitute parts are grouped by amplifier type (General Purpose or Audio). General Purpose amplifiers maintain closer electrical parameter alignment with the OPA2228U. Audio amplifiers represent functional alternatives where application requirements permit relaxed input offset voltage and input bias current specifications.

Compliance Requirements: All substitute parts must maintain RoHS3 compliance and EAR99 export classification to ensure regulatory equivalence.

Parameter Comparison

Engineering Selection Recommendations

MC33077DR2G (onsemi): This substitute maintains General Purpose amplifier classification and identical slew rate (11V/µs) to the OPA2228U. The MC33077DR2G operates within the same supply voltage range (5V to 36V) and temperature range (-40°C to 85°C). Gain bandwidth product is slightly elevated at 37 MHz versus 33 MHz. Input bias current and input offset voltage are higher than the OPA2228U but remain within acceptable ranges for general purpose applications. Output current per channel is reduced to 33 mA from 45 mA. RoHS3 compliance and MSL rating of 1 (Unlimited) provide equivalent regulatory status. This part is suitable for direct substitution in applications where the specified electrical parameter variations are acceptable.

LM833DT (STMicroelectronics): This substitute is classified as an Audio amplifier and represents a functional alternative where audio-specific performance is acceptable. The LM833DT operates within the OPA2228U minimum supply voltage (5V) but has a reduced maximum supply voltage of 30V versus 36V. Slew rate is reduced to 7V/µs, and gain bandwidth product is significantly lower at 15 MHz. Input bias current and input offset voltage are substantially higher. Operating temperature range extends to 105°C. RoHS3 compliance is maintained. This part is suitable for substitution only in applications where reduced bandwidth and higher input offset voltage specifications are tolerable, and where supply voltage does not exceed 30V.

All substitute parts maintain 8-SOIC packaging, surface mount configuration, and RoHS3 compliance. Selection between substitutes depends on specific application requirements regarding bandwidth, input offset voltage, input bias current, and maximum supply voltage.

Frequently Asked Questions (FAQ)

Q: Can MC33077DR2G replace OPA2228U in all applications?

A: MC33077DR2G is mechanically and electrically compatible for most general purpose applications. The primary differences are higher input bias current (280 nA vs. 2.5 nA) and higher input offset voltage (130 µV vs. 5 µV). Applications sensitive to input offset voltage or requiring extremely low input bias current may require circuit redesign or performance verification.

Q: What are the limitations of LM833DT as a substitute?

A: LM833DT has three primary limitations: maximum supply voltage is 30V (versus 36V for OPA2228U), slew rate is reduced to 7V/µs (versus 11V/µs), and gain bandwidth product is 15 MHz (versus 33 MHz). Applications requiring supply voltages above 30V or high-speed signal processing are not suitable for LM833DT substitution.

Q: Are all substitute parts pin-compatible with OPA2228U?

A: All substitute parts use 8-SOIC packaging with identical pin count and spacing (0.154", 3.90mm width). Pin-level compatibility requires verification of individual pinout diagrams, as functional assignment may differ between manufacturers.

Q: Do substitute parts have the same moisture sensitivity as OPA2228U?

A: No. OPA2228U has MSL rating of 2 (1 Year), while both MC33077DR2G and LM833DT have MSL rating of 1 (Unlimited). This indicates substitute parts have lower moisture sensitivity and longer shelf life under standard storage conditions.

Q: Which substitute is preferred for high-precision applications?

A: MC33077DR2G is preferred for high-precision applications due to lower input offset voltage (130 µV) and lower input bias current (280 nA) compared to LM833DT (300 µV and 300 nA respectively), though both are higher than the OPA2228U specification.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes, all parts use identical 8-SOIC footprint and can be placed on the same PCB layout without modification. However, electrical performance differences may require circuit tuning or component value adjustments depending on application sensitivity.