OPA228PA Equivalent & Substitute Parts

Part Overview

The OPA228PA is a general-purpose operational amplifier manufactured by Texas Instruments, housed in an 8-DIP through-hole package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The OPA228PA 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 bias current specifications.

Finding equivalent and substitute parts is necessary due to the Last Time Buy status, which restricts future procurement. Alternative parts with identical or superior electrical characteristics and compatible packaging options ensure design continuity and long-term supply chain reliability.

Substiute Parts

OPA228PA

Texas InstrumentsIn Stock: 2136OPA228PA Datasheet

Current PartRFQ

OPA228UA/2K5

Texas InstrumentsIn Stock: 2929OPA228UA/2K5 Datasheet

MFR RecommendedRFQ

LT1360CN8#PBF

Analog Devices Inc.In Stock: 1163LT1360CN8#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the OPA228PA is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Amplifier Type: General Purpose or Voltage Feedback
• Number of Circuits: 1 (single-channel configuration)
• Slew Rate: Minimum 11 V/µs
• Gain Bandwidth Product: Minimum 33 MHz
• Current - Input Bias: Maximum 2.5 nA (lower is acceptable)
• Voltage - Input Offset: Maximum 10 µV (lower is acceptable)
• Current - Supply: Maximum 3.7 mA (lower is acceptable)
• Current - Output / Channel: Minimum 45 mA
• Voltage - Supply Span: Minimum 5 V to Maximum 36 V (or compatible subset)
• Operating Temperature: Minimum -40°C to Maximum 85°C (or compatible subset)

Mechanical Compatibility Criteria:

• Package / Case: 8-DIP through-hole or surface-mount equivalent
• Mounting Type: Through Hole or Surface Mount

Compliance Criteria:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

Substitute parts must satisfy all electrical parameters within the specified ranges and maintain regulatory compliance. Package differences are acceptable when mechanical integration is feasible for the application.

Parameter Comparison

Engineering Selection Recommendations

OPA228UA/2K5 (Texas Instruments)

The OPA228UA/2K5 is the primary substitute for the OPA228PA. Both devices share identical electrical specifications: 33 MHz gain-bandwidth product, 11 V/µs slew rate, 2.5 nA input bias current, and 10 µV input offset voltage. Both operate across the -40°C to 85°C temperature range and comply with ROHS3 standards. The OPA228UA/2K5 is currently in Active product status with 2915 units in stock, ensuring supply continuity. The primary difference is packaging: OPA228UA/2K5 uses 8-SOIC surface-mount configuration versus the through-hole 8-DIP of the OPA228PA. This substitution is suitable for designs that can accommodate surface-mount assembly or when board redesign is feasible.

LT1360CN8#PBF (Analog Devices Inc.)

The LT1360CN8#PBF is an alternative substitute with enhanced performance characteristics. It maintains the same 8-DIP through-hole package as the OPA228PA, eliminating mechanical redesign requirements. The LT1360CN8#PBF exceeds OPA228PA specifications in slew rate (800 V/µs versus 11 V/µs) and gain-bandwidth product (50 MHz versus 33 MHz). However, the LT1360CN8#PBF exhibits higher input bias current (300 nA versus 2.5 nA) and higher input offset voltage (300 µV versus 10 µV), which may impact precision applications. The maximum supply voltage is 30 V versus 36 V for the OPA228PA. Operating temperature range is 0°C to 70°C, narrower than the OPA228PA's -40°C to 85°C. The LT1360CN8#PBF is currently in Active product status with 1147 units in stock. This substitution is suitable for applications prioritizing high slew rate and bandwidth over input precision and extended temperature range.

Frequently Asked Questions (FAQ)

Q: Can the OPA228UA/2K5 directly replace the OPA228PA in existing PCB designs?

A: Electrical substitution is direct; both devices have identical electrical specifications. However, the OPA228UA/2K5 uses 8-SOIC surface-mount packaging while the OPA228PA uses 8-DIP through-hole packaging. Direct PCB replacement requires either a surface-mount to through-hole adapter or PCB redesign. Pin-to-pin electrical functionality is equivalent.

Q: What are the key differences between OPA228UA/2K5 and LT1360CN8#PBF?

A: Both are active substitutes for the OPA228PA. The OPA228UA/2K5 maintains identical electrical specifications to the OPA228PA with different packaging. The LT1360CN8#PBF offers superior slew rate (800 V/µs) and bandwidth (50 MHz) but has degraded input precision (300 nA bias current, 300 µV offset versus 2.5 nA and 10 µV). The LT1360CN8#PBF also has a lower maximum supply voltage (30 V) and narrower temperature range (0°C to 70°C).

Q: Is the LT1360CN8#PBF suitable for precision instrumentation applications?

A: The LT1360CN8#PBF is not recommended for precision instrumentation requiring low input bias current and low input offset voltage. The 300 nA input bias current and 300 µV offset voltage are 120× and 30× higher than the OPA228PA specifications, respectively. The OPA228UA/2K5 maintains the precision characteristics of the OPA228PA.

Q: What is the temperature operating range limitation of the LT1360CN8#PBF?

A: The LT1360CN8#PBF operates from 0°C to 70°C, which is narrower than the OPA228PA range of -40°C to 85°C. Applications requiring operation below 0°C or above 70°C cannot use the LT1360CN8#PBF as a substitute.

Q: Are both substitute parts RoHS3 compliant?

A: Yes, both OPA228UA/2K5 and LT1360CN8#PBF are ROHS3 Compliant and REACH Unaffected, matching the compliance status of the OPA228PA.

Q: Which substitute should be selected for a through-hole PCB design?

A: The LT1360CN8#PBF maintains the 8-DIP through-hole package of the OPA228PA, eliminating mechanical redesign. However, verify that the higher input bias current (300 nA) and input offset voltage (300 µV) are acceptable for your application. If precision specifications are critical, the OPA228UA/2K5 is electrically superior but requires surface-mount assembly capability.

Q: What is the inventory status of substitute parts?

A: OPA228UA/2K5 has 2915 units in stock (Active status). LT1360CN8#PBF has 1147 units in stock (Active status). Both provide superior supply availability compared to the OPA228PA (2100 units, Last Time Buy status).