OPA657N/250 Equivalent & Substitute Parts

Part Overview

The OPA657N/250 is a voltage feedback operational amplifier manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This single-circuit amplifier is designed for high-speed applications requiring wide bandwidth and fast slew rate performance. The device is actively produced and fully compliant with RoHS3 and REACH regulations. Substitute parts are identified when original inventory is unavailable or when alternative sourcing is required while maintaining functional and electrical compatibility within specified parameter tolerances.

Substiute Parts

OPA657N/250

Texas InstrumentsIn Stock: 16418OPA657N/250 Datasheet

Current PartRFQ

MAX4104EUK+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3791MAX4104EUK+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the OPA657N/250 are identified based on strict electrical and mechanical compatibility criteria. The primary substitution logic is based on the following allowed parameters:

Mechanical Compatibility:

• Package type: SOT-23-5 (SC-74A, SOT-753)
• Mounting type: Surface Mount
• Pin count and footprint equivalence

Electrical Compatibility:

• Amplifier topology: Voltage Feedback
• Single circuit configuration
• Operating temperature range: -40°C to 85°C minimum
• Supply voltage span overlap
• Output current capability: 70 mA per channel
• Regulatory compliance: RoHS3 and REACH

Performance Parameters (Allowed Variance):

• Slew rate, bandwidth, gain-bandwidth product, input bias current, input offset voltage, and supply current are evaluated for application suitability but do not disqualify substitution when mechanical and primary electrical criteria are met.

The MAX4104EUK+T meets all mechanical compatibility requirements and operates within the specified temperature and supply voltage ranges, qualifying it as a valid substitute.

Parameter Comparison

Engineering Selection Recommendations

OPA657N/250 Selection Criteria:

• Primary choice when original Texas Instruments part is available
• Preferred for applications requiring 700 V/µs slew rate and 1.6 GHz gain-bandwidth product
• Suitable for designs with 8 V to 12 V supply voltage requirements
• Compliant with RoHS3 and REACH regulations
• MSL 2 rating requires controlled storage conditions (1 year shelf life)

MAX4104EUK+T Selection Criteria:

• Valid substitute when OPA657N/250 is unavailable
• Meets identical mechanical and package requirements
• Operates within overlapping supply voltage range (7 V to 11 V)
• Identical output current capability (70 mA)
• Identical operating temperature range (-40°C to 85°C)
• Superior moisture sensitivity rating (MSL 1, unlimited shelf life)
• Compliant with RoHS3 and REACH regulations
• Higher -3dB bandwidth (625 MHz) and lower slew rate (400 V/µs) compared to primary part

Both parts are active products with confirmed inventory and full regulatory compliance. Selection between them is determined by availability and specific application performance requirements.

Frequently Asked Questions (FAQ)

Q: Can MAX4104EUK+T be used as a direct replacement for OPA657N/250?

A: Yes. Both devices are housed in identical SOT-23-5 packages with matching pin configurations. They share the same amplifier topology (voltage feedback), single-circuit configuration, output current rating (70 mA), and operating temperature range (-40°C to 85°C). Supply voltage ranges overlap (7 V to 11 V common operating window). Both are RoHS3 and REACH compliant.

Q: What are the key electrical differences between these parts?

A: The OPA657N/250 provides higher slew rate (700 V/µs vs. 400 V/µs) and higher gain-bandwidth product (1.6 GHz). The MAX4104EUK+T offers higher -3dB bandwidth (625 MHz vs. 350 MHz), lower input bias current (32 µA vs. 2 pA), and higher input offset voltage (1 mV vs. 250 µV). Supply current differs (14 mA vs. 20 mA).

Q: Are there packaging differences?

A: No. Both parts use SC-74A / SOT-753 surface mount packages with SOT-23-5 pin configuration. Footprints are identical for PCB placement.

Q: What is the significance of the MSL rating difference?

A: OPA657N/250 has MSL 2 (1 year shelf life), requiring controlled storage. MAX4104EUK+T has MSL 1 (unlimited shelf life), allowing extended storage without moisture absorption concerns. This affects component handling and inventory management but does not impact in-circuit performance.

Q: Which part should be selected for new designs?

A: Selection depends on application-specific performance requirements. For designs requiring maximum slew rate and gain-bandwidth product, OPA657N/250 is preferred. For designs prioritizing bandwidth and lower input bias current, MAX4104EUK+T is suitable. Both are active products with confirmed long-term availability.

Q: Are both parts suitable for the same supply voltage range?

A: The common operating window is 8 V to 11 V. OPA657N/250 extends to 12 V maximum; MAX4104EUK+T extends to 7 V minimum. Verify specific supply voltage requirements in your application before selection.