OPA657NB/250 Equivalent & Substitute Parts

Part Overview

The OPA657NB/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 currently in active production status with robust inventory availability of 19,758 pieces in stock.

Substitute parts become necessary when the primary device experiences supply constraints, extended lead times, or when design requirements permit operation within alternative electrical specifications. The OPA657NB/250 has been identified with one manufacturer-recommended equivalent: the MAX4104EUK+T from Analog Devices Inc./Maxim Integrated.

Substiute Parts

OPA657NB/250

Texas InstrumentsIn Stock: 19839OPA657NB/250 Datasheet

Current PartRFQ

MAX4104EUK+T

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the OPA657NB/250 is determined by the following critical parameters:

Functional Compatibility Requirements:

• Amplifier Type: Voltage Feedback (required match)
• Number of Circuits: 1 (required match)
• Package / Case: SC-74A, SOT-753 (required match)
• Supplier Device Package: SOT-23-5 (required match)
• Mounting Type: Surface Mount (required match)

Electrical Operating Range Compatibility:

• Operating Temperature Range: -40°C to 85°C (required match)
• Voltage - Supply Span: Must accommodate 8V minimum to 12V maximum
• Current - Output / Channel: 70 mA (required match)

Regulatory & Compliance Requirements:

• RoHS Status: ROHS3 Compliant (required match)
• REACH Status: REACH Unaffected (required match)
• Product Status: Active (required match)

The MAX4104EUK+T qualifies as a manufacturer-recommended substitute because it satisfies all functional compatibility requirements, operates within the specified temperature range, maintains the same package configuration, and meets all regulatory compliance standards. Electrical parameter variations exist within acceptable design margins for applications where the OPA657NB/250 specifications are not critical constraints.

Parameter Comparison

Engineering Selection Recommendations

OPA657NB/250 Selection Criteria:

The OPA657NB/250 is the primary choice when maximum slew rate performance (700 V/µs) and lowest input bias current (1 pA) are design requirements. This device maintains ROHS3 compliance and REACH unaffected status, meeting all regulatory requirements for industrial and commercial applications. The part is actively manufactured with substantial inventory availability (19,758 pieces), ensuring supply reliability.

MAX4104EUK+T Selection Criteria:

The MAX4104EUK+T serves as the manufacturer-recommended substitute when the OPA657NB/250 experiences supply constraints or extended lead times. This device maintains identical functional compatibility through matching package configuration (SOT-23-5), circuit count (1), and amplifier topology (voltage feedback). Both devices operate across the identical temperature range (-40°C to 85°C) and maintain equivalent regulatory compliance (ROHS3 Compliant, REACH Unaffected).

The MAX4104EUK+T exhibits superior -3dB bandwidth performance (625 MHz versus 350 MHz) and improved moisture sensitivity rating (MSL 1 Unlimited versus MSL 2 1 Year). Trade-offs include reduced slew rate (400 V/µs versus 700 V/µs), elevated input bias current (32 µA versus 1 pA), and increased input offset voltage (1 mV versus 100 µV). Supply voltage range is marginally narrower (7V to 11V versus 8V to 12V).

Both devices are active production parts with ROHS3 compliance and REACH unaffected status, suitable for direct substitution in applications where the specified electrical parameter variations are acceptable.

Frequently Asked Questions (FAQ)

Q: Can the MAX4104EUK+T directly replace the OPA657NB/250 in existing PCB designs?

A: Yes. Both devices share identical package configuration (SOT-23-5, SC-74A, SOT-753) and pinout, enabling direct PCB substitution without layout modifications. Pin-for-pin compatibility is maintained across all five leads.

Q: What are the primary electrical differences between these devices?

A: The OPA657NB/250 provides superior slew rate (700 V/µs versus 400 V/µs) and significantly lower input bias current (1 pA versus 32 µA). The MAX4104EUK+T offers higher -3dB bandwidth (625 MHz versus 350 MHz) and improved moisture sensitivity rating. Supply voltage range differs slightly: OPA657NB/250 operates 8V to 12V; MAX4104EUK+T operates 7V to 11V.

Q: Are both devices compliant with current environmental regulations?

A: Yes. Both the OPA657NB/250 and MAX4104EUK+T are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for industrial, commercial, and consumer applications.

Q: Which device should be selected for low-noise, precision applications?

A: The OPA657NB/250 is the appropriate choice for applications requiring minimal input bias current (1 pA) and low input offset voltage (100 µV). These specifications make it suitable for precision instrumentation and low-noise signal conditioning circuits.

Q: What is the significance of the moisture sensitivity level difference?

A: The OPA657NB/250 carries MSL 2 (1 Year) rating, requiring controlled storage and handling within one year of manufacture. The MAX4104EUK+T carries MSL 1 (Unlimited) rating, permitting indefinite storage without moisture sensitivity constraints. This affects long-term inventory management and component shelf life.

Q: Are both devices suitable for high-speed applications?

A: Both devices support high-speed operation. The OPA657NB/250 excels in applications requiring maximum slew rate (700 V/µs). The MAX4104EUK+T provides superior bandwidth performance (625 MHz). Selection depends on whether slew rate or bandwidth is the critical performance parameter.

Q: What packaging formats are available for these devices?

A: The OPA657NB/250 is supplied in Cut Tape (CT) and Digi-Reel® packaging. The MAX4104EUK+T is supplied in Tape & Reel (TR) packaging. Both use identical SOT-23-5 component packaging for surface mount assembly.