LP2902N/PB Equivalent & Substitute Parts

Part Overview

The LP2902N/PB is a general purpose operational amplifier integrated circuit manufactured by Texas Instruments, configured as a 4-circuit device in a 14-pin DIP package. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement requirements. The LP2902N/PB operates across a wide supply voltage range of 3V to 26V and is suitable for applications requiring low input bias current and moderate bandwidth characteristics.

Substiute Parts

LP2902N/PB

Texas InstrumentsIn Stock: 694LP2902N/PB Datasheet

Current PartRFQ

LP2902N/NOPB

Texas InstrumentsIn Stock: 1131LP2902N/NOPB Datasheet

DirectRFQ

KA324A

Fairchild SemiconductorIn Stock: 1409KA324A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP2902N/PB is determined by the following critical parameters: amplifier type (general purpose), number of circuits (4), package form factor (14-DIP through-hole), and electrical operating ranges (supply voltage span, input bias current, input offset voltage, output current capability, and operating temperature range).

The LP2902N/PB has been grouped into two substitution categories:

Direct Packaging Equivalent: Parts that maintain identical electrical specifications and package configuration but differ in product status or compliance certification.

Functional Equivalent: Parts that provide the same amplifier circuit count and general purpose functionality within compatible electrical operating ranges, though with variations in specific performance parameters.

Substitution is valid when the substitute part meets or exceeds the electrical requirements of the original design and maintains mechanical compatibility with the 14-DIP through-hole footprint.

Parameter Comparison

Engineering Selection Recommendations

LP2902N/NOPB (Texas Instruments): This part is the direct equivalent of the LP2902N/PB with identical electrical specifications and package configuration. The LP2902N/NOPB is classified as active product status and is ROHS3 compliant, making it the preferred selection for new designs and procurement where regulatory compliance is required. The primary difference is packaging format (tube versus bulk), which does not affect electrical performance or mechanical compatibility.

KA324A (Fairchild Semiconductor): This part provides functional equivalence as a 4-circuit general purpose amplifier in the same 14-DIP through-hole package. The KA324A is active product status and REACH unaffected. However, the KA324A exhibits different electrical characteristics: higher input bias current (40 nA versus 2 nA), higher supply current (1.5 mA versus 150 µA), higher output current capability (40 mA versus 10 mA), and a narrower operating temperature range (0°C to 70°C versus -40°C to 85°C). Selection of the KA324A is appropriate only when the design can accommodate these parameter variations and does not require the extended low-temperature operating range of the original part.

Frequently Asked Questions (FAQ)

Q: Can the LP2902N/NOPB be used as a direct replacement for the LP2902N/PB?

A: Yes. The LP2902N/NOPB is electrically and mechanically identical to the LP2902N/PB. Both parts share the same electrical specifications, 14-DIP package footprint, and through-hole mounting configuration. The LP2902N/NOPB is the active product variant and is recommended for new procurement.

Q: What are the key differences between the LP2902N/PB and the KA324A?

A: The LP2902N/PB and KA324A differ in input bias current (2 nA versus 40 nA), supply current (150 µA versus 1.5 mA), output current per channel (10 mA versus 40 mA), and operating temperature range (-40°C to 85°C versus 0°C to 70°C). Both are 4-circuit general purpose amplifiers in 14-DIP packages. The KA324A is suitable for applications that do not require the extended temperature range or low input bias current of the LP2902N/PB.

Q: Is the KA324A compatible with the LP2902N/PB in terms of package footprint?

A: Yes. Both parts use the 14-DIP (0.300", 7.62mm) through-hole package, ensuring mechanical compatibility on printed circuit boards designed for the LP2902N/PB. However, electrical parameter differences must be evaluated for circuit-level compatibility.

Q: What is the significance of the RoHS compliance difference between LP2902N/PB and LP2902N/NOPB?

A: The LP2902N/PB is RoHS non-compliant, while the LP2902N/NOPB is ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the LP2902N/NOPB is the appropriate selection. Both parts are electrically identical.

Q: Can the KA324A be used in applications requiring the -40°C to 85°C operating temperature range?

A: No. The KA324A operates only from 0°C to 70°C, which does not cover the extended low-temperature range of the LP2902N/PB. Applications requiring operation below 0°C or above 70°C must use the LP2902N/PB or LP2902N/NOPB.

Q: What is the impact of higher supply current in the KA324A compared to the LP2902N/PB?

A: The KA324A draws 1.5 mA supply current per device versus 150 µA for the LP2902N/PB, representing a 10-fold increase. This affects power dissipation and thermal management in battery-powered or power-constrained applications. The LP2902N/PB is preferred for low-power designs.