LM4250CN/NOPB Equivalent & Substitute Parts

Part Overview

The LM4250CN/NOPB is a general purpose operational amplifier manufactured by Texas Instruments, housed in an 8-DIP package. This device is classified as obsolete, making it necessary to identify equivalent and substitute components for new designs or production continuity. The LM4250CN/NOPB features a gain bandwidth product of 250 kHz and operates across a wide supply voltage range of 2V to 36V, making it suitable for low-frequency analog signal processing applications.

Substiute Parts

LM4250CN/NOPB

Texas InstrumentsIn Stock: 3812LM4250CN/NOPB Datasheet

Current PartRFQ

PGA204AP

Texas InstrumentsIn Stock: 4198PGA204AP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM4250CN/NOPB requires evaluation of the following critical parameters that determine functional compatibility:

Amplifier Type Classification: The LM4250CN/NOPB is a general purpose operational amplifier. Substitute components must maintain compatibility with general purpose amplifier applications, though instrumentation amplifiers with appropriate gain and bandwidth characteristics may serve in specific circuit topologies.

Supply Voltage Range: The LM4250CN/NOPB operates from 2V to 36V. Substitute parts must support this voltage range or a compatible subset to ensure operation in existing power supply configurations.

Gain Bandwidth Product: At 250 kHz, the LM4250CN/NOPB is suitable for low-frequency signal processing. Substitute components with higher bandwidth products may be used in applications where the original bandwidth is not a limiting factor.

Input Bias Current and Offset Voltage: The 75 nA input bias current and 6 mV input offset voltage define the input impedance and DC accuracy characteristics. Substitutes with lower input bias current and offset voltage represent improvements in performance.

Package and Mounting: The 8-DIP through-hole package is a standard form factor. Substitutes in different package types require circuit board redesign.

Compliance and Status: RoHS3 compliance and REACH unaffected status are mandatory for new designs. Product status (obsolete vs. last time buy) affects long-term availability.

The PGA204AP is identified as a manufacturer-recommended substitute, though it represents a different amplifier class (instrumentation amplifier) with enhanced specifications and a larger 16-DIP package footprint.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement in Existing Designs:

The LM4250CN/NOPB is obsolete. Existing inventory of 3800 pieces is available, but long-term sourcing is not viable. New designs must transition to alternative components.

For New Production:

The PGA204AP is the manufacturer-recommended substitute. However, substitution requires the following considerations:

1. Package Footprint Change: The PGA204AP uses a 16-DIP package versus the 8-DIP of the LM4250CN/NOPB. Circuit board redesign is mandatory.

2. Supply Voltage Minimum: The PGA204AP requires a minimum supply voltage of 9V, compared to 2V for the LM4250CN/NOPB. Existing 2V to 9V supply configurations must be verified or redesigned.

3. Amplifier Class Difference: The PGA204AP is an instrumentation amplifier with integrated gain setting and superior input characteristics (500 pA bias current, 25 µV offset). General purpose amplifier applications may not require these features.

4. Compliance Status: Both devices are ROHS3 compliant and REACH unaffected. The PGA204AP carries a "Last Time Buy" status, indicating limited future availability.

5. Operating Temperature: The PGA204AP supports -40°C to 85°C, extending the lower temperature range beyond the LM4250CN/NOPB's 0°C to 70°C specification.

Alternative Approach:

For applications requiring a true general purpose amplifier replacement with minimal circuit board changes, evaluation of other general purpose operational amplifiers in 8-DIP packages from the Texas Instruments portfolio is recommended, provided they meet the supply voltage, bandwidth, and compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can the PGA204AP be used as a direct pin-for-pin replacement for the LM4250CN/NOPB?

A: No. The PGA204AP is a 16-DIP package, while the LM4250CN/NOPB is an 8-DIP package. Pin counts and pinout configurations differ. Circuit board redesign is required.

Q: What is the minimum supply voltage requirement for the PGA204AP?

A: The PGA204AP requires a minimum supply voltage of 9V. The LM4250CN/NOPB operates from 2V. If your application uses supply voltages below 9V, the PGA204AP is not suitable without power supply modification.

Q: Why is the PGA204AP classified as an instrumentation amplifier rather than a general purpose amplifier?

A: Instrumentation amplifiers are optimized for precision measurement applications with integrated gain setting, high input impedance, and low offset voltage. The PGA204AP features 500 pA input bias current and 25 µV offset voltage, compared to the LM4250CN/NOPB's 75 nA and 6 mV. General purpose amplifiers are designed for broader applications with less stringent input specifications.

Q: Is the PGA204AP available for new orders?

A: The PGA204AP carries a "Last Time Buy" status, indicating limited future availability. Current inventory is 4100 pieces. Long-term sourcing should not rely on this component.

Q: What compliance certifications apply to both devices?

A: Both the LM4250CN/NOPB and PGA204AP are ROHS3 compliant and REACH unaffected. Both carry EAR99 ECCN classification and HTSUS code 8542.33.0001.

Q: Can I use the PGA204AP in a circuit designed for the LM4250CN/NOPB without modification?

A: No. Circuit modifications are required due to package differences, supply voltage requirements, and functional differences between general purpose and instrumentation amplifier topologies. Schematic and layout redesign is necessary.

Q: What is the operating temperature range difference between these devices?

A: The LM4250CN/NOPB operates from 0°C to 70°C. The PGA204AP operates from -40°C to 85°C, providing extended low-temperature capability and higher maximum operating temperature.