LM348N/PB Equivalent & Substitute Parts

Part Overview

The LM348N/PB is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, configured as a 4-circuit device in a 14-DIP package. This component is classified as obsolete, indicating discontinued production and limited availability through standard distribution channels. The identification of equivalent and substitute parts is necessary to maintain design continuity, ensure project completion, and provide alternative sourcing options for applications currently utilizing this amplifier configuration.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	LM348N/PB	—
Manufacturer	Texas Instruments	—
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Package / Case	14-DIP (0.300", 7.62mm)	—
Slew Rate	0.5	V/µs
Gain Bandwidth Product	1	MHz
Current - Input Bias	30	nA
Voltage - Input Offset	1	mV
Current - Supply	2.4	mA (x4 Channels)
Current - Output / Channel	25	mA
Voltage - Supply Span (Min)	10	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	0 to 70	°C
Mounting Type	Through Hole	—
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the LM348N/PB is determined by electrical and mechanical compatibility within the following critical parameters:

Mechanical Compatibility: All substitute parts must utilize the 14-DIP (0.300", 7.62mm) through-hole package to ensure direct pin-for-pin compatibility and identical printed circuit board footprint.

Functional Compatibility: Substitute parts must provide 4 operational amplifier circuits within a single integrated circuit package to maintain circuit topology and board layout.

Electrical Operating Range: The supply voltage span must encompass or exceed the original specification (10V to 36V minimum). Parts with narrower supply ranges may not function in all original applications.

Performance Parameters: Slew rate, gain bandwidth product, input bias current, input offset voltage, and output current specifications determine suitability for specific signal processing applications. Parts with superior performance characteristics (higher slew rate, wider bandwidth, lower input bias current) provide enhanced performance but remain functionally compatible. Parts with degraded performance may not satisfy all original design requirements.

Temperature Operating Range: The operating temperature range must include the original specification (0°C to 70°C). Extended temperature ranges provide additional operational flexibility.

Regulatory Compliance: All substitute parts must maintain ROHS3 compliance and REACH unaffected status to satisfy current regulatory requirements.

Parameter Comparison

Parameter	LM348N/PB (TI)	LM248N (STM)	LM348N (STM)	AD713JNZ	NJM2060D#	OP467GPZ	OP470GPZ	OP482GPZ	OP497GPZ
Manufacturer	Texas Instruments	STMicroelectronics	STMicroelectronics	Analog Devices Inc.	Nisshinbo Micro Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	General Purpose	General Purpose	General Purpose	J-FET	General Purpose	General Purpose	General Purpose	J-FET	General Purpose
Number of Circuits	4	4	4	4	4	4	4	4	4
Package / Case	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)
Slew Rate (V/µs)	0.5	0.5	0.5	20	4	350	3	9	0.15
Gain Bandwidth Product (MHz)	1	1.3	1	4	10	28	6	4	0.5
Current - Input Bias (nA)	30	30	30	0.01	40	150	15	0.003	0.06
Voltage - Input Offset (mV)	1	1	1	0.3	0.5	0.2	0.4	0.2	0.08
Current - Supply (mA)	2.4	2.1	2.1	10	9	8	9	0.21	0.525
Current - Output / Channel (mA)	25	25	25	25	—	—	—	10	25
Voltage - Supply Span (Min)	10 V	44 V	44 V	9 V	8 V	9 V	9 V	9 V	4 V
Voltage - Supply Span (Max)	36 V	44 V	44 V	36 V	36 V	36 V	36 V	36 V	40 V
Operating Temperature (°C)	0 to 70	-40 to 105	0 to 70	0 to 70	-20 to 75	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Product Status	Obsolete	Obsolete	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Electrical Equivalents (Obsolete Status):

LM348N manufactured by STMicroelectronics provides identical electrical specifications to the original LM348N/PB, including slew rate (0.5 V/µs), gain bandwidth product (1 MHz), input bias current (30 nA), and input offset voltage (1 mV). This part maintains the same operating temperature range (0°C to 70°C) and is classified as obsolete. The STMicroelectronics variant is suitable for direct replacement in applications where the original performance characteristics are required and inventory availability is critical.

LM248N manufactured by STMicroelectronics provides near-equivalent electrical performance with marginally improved gain bandwidth product (1.3 MHz versus 1 MHz). This part is also classified as obsolete. The supply voltage specification differs (44 V fixed versus 10–36 V range), which may limit applicability in designs requiring the full original voltage range. Extended operating temperature range (-40°C to 105°C) provides additional operational flexibility.

Active Substitutes with Enhanced Performance:

OP467GPZ manufactured by Analog Devices Inc. provides significantly enhanced performance characteristics including substantially higher slew rate (350 V/µs), wider gain bandwidth product (28 MHz), and extended operating temperature range (-40°C to 85°C). This part is active and ROHS3 compliant. The higher input bias current (150 nA) and lower input offset voltage (200 µV) represent trade-offs in performance. This substitute is suitable for applications where improved frequency response and slew rate are beneficial.

OP470GPZ manufactured by Analog Devices Inc. provides moderate performance enhancement with slew rate of 3 V/µs and gain bandwidth product of 6 MHz. This part is active and ROHS3 compliant with extended operating temperature range (-40°C to 85°C). Lower input bias current (15 nA) and higher input offset voltage (400 µV) represent performance trade-offs. This substitute balances performance improvement with electrical characteristics closer to the original specification.

OP497GPZ manufactured by Analog Devices Inc. provides reduced performance characteristics with slew rate of 0.15 V/µs and gain bandwidth product of 500 kHz. This part is active and ROHS3 compliant with extended operating temperature range (-40°C to 85°C) and wider supply voltage span (4–40 V). Significantly lower supply current (525 µA) and superior input offset voltage (80 µV) make this substitute suitable for low-power applications. This part is not suitable for applications requiring the original slew rate and bandwidth specifications.

Specialized Substitutes (J-FET Technology):

AD713JNZ manufactured by Analog Devices Inc. utilizes J-FET input technology, providing extremely low input bias current (10 pA) and superior slew rate (20 V/µs). This part is active and ROHS3 compliant. The higher supply current (10 mA) and different input offset voltage (300 µV) represent performance trade-offs. This substitute is suitable for applications requiring extremely low input bias current and high impedance input characteristics.

OP482GPZ manufactured by Analog Devices Inc. utilizes J-FET input technology with extremely low input bias current (3 pA) and moderate slew rate (9 V/µs). This part is active and ROHS3 compliant with extended operating temperature range (-40°C to 85°C). Significantly reduced supply current (210 µA) and output current per channel (10 mA) represent performance trade-offs. This substitute is suitable for low-power applications requiring extremely low input bias current.

General Purpose Substitute:

NJM2060D# manufactured by Nisshinbo Micro Devices Inc. provides enhanced performance with slew rate of 4 V/µs and gain bandwidth product of 10 MHz. This part is active and RoHS compliant with extended operating temperature range (-20°C to 75°C). Slightly higher input bias current (40 nA) and lower input offset voltage (500 µV) represent minor performance trade-offs. This substitute is suitable for applications requiring improved frequency response while maintaining general-purpose amplifier characteristics.

Frequently Asked Questions (FAQ)

Q: Can the LM348N/PB be directly replaced with the STMicroelectronics LM348N?

A: Yes. The STMicroelectronics LM348N provides identical electrical specifications including slew rate, gain bandwidth product, input bias current, and input offset voltage. Both parts utilize the 14-DIP package and maintain the same operating temperature range (0°C to 70°C). Direct pin-for-pin substitution is supported. Both parts are classified as obsolete.

Q: What is the primary difference between the LM248N and the original LM348N/PB?

A: The LM248N provides marginally improved gain bandwidth product (1.3 MHz versus 1 MHz). The supply voltage specification differs: the LM248N operates at a fixed 44 V, while the original LM348N/PB operates across a 10–36 V range. The LM248N offers extended operating temperature range (-40°C to 105°C). Both parts are obsolete.

Q: Which active substitute provides the closest electrical match to the LM348N/PB?

A: The OP470GPZ provides the closest electrical match among active substitutes, with slew rate of 3 V/µs and gain bandwidth product of 6 MHz. Input bias current is significantly lower (15 nA versus 30 nA), and input offset voltage is higher (400 µV versus 1 mV). This part is active, ROHS3 compliant, and supports extended operating temperature range (-40°C to 85°C).

Q: Are all substitute parts compatible with the original 14-DIP package footprint?

A: Yes. All substitute parts listed utilize the 14-DIP (0.300", 7.62mm) through-hole package, ensuring identical printed circuit board footprint and pin-for-pin compatibility. Direct board-level substitution is supported without layout modifications.

Q: What is the advantage of J-FET input amplifiers (AD713JNZ, OP482GPZ) over general-purpose substitutes?

A: J-FET input amplifiers provide extremely low input bias current (10 pA for AD713JNZ, 3 pA for OP482GPZ) compared to the original 30 nA specification. This characteristic is advantageous in high-impedance input applications where input bias current must be minimized. Trade-offs include higher supply current and different input offset voltage specifications.

Q: Can the OP497GPZ be used as a direct replacement for the LM348N/PB?

A: The OP497GPZ is not suitable as a direct replacement for applications requiring the original slew rate (0.5 V/µs) and gain bandwidth product (1 MHz) specifications. The OP497GPZ provides reduced performance with slew rate of 0.15 V/µs and gain bandwidth product of 500 kHz. This substitute is suitable only for low-power applications where reduced bandwidth is acceptable.

Q: What regulatory compliance certifications are maintained across all substitute parts?

A: All substitute parts maintain ROHS3 compliance and REACH unaffected status, satisfying current regulatory requirements for electronic component manufacturing and distribution. The NJM2060D# maintains RoHS compliance (not specifically ROHS3).

Q: Which substitute provides the best performance enhancement for high-frequency applications?

A: The OP467GPZ provides the most significant performance enhancement for high-frequency applications, with slew rate of 350 V/µs and gain bandwidth product of 28 MHz. This represents a 28-fold improvement in bandwidth compared to the original specification. Trade-offs include higher input bias current (150 nA) and lower input offset voltage (200 µV).

Q: Are there supply voltage compatibility considerations when selecting a substitute?

A: Yes. The original LM348N/PB operates across 10–36 V. The LM248N operates at fixed 44 V, which may not be compatible with designs requiring the full original voltage range. The OP497GPZ provides the widest supply voltage span (4–40 V), offering maximum flexibility. All other substitutes operate within or exceed the original 10–36 V range.

Q: What is the significance of product status (Active versus Obsolete) in substitute selection?

A: Active products are currently manufactured and distributed through standard channels, ensuring long-term availability and supply continuity. Obsolete products have discontinued production and limited inventory availability. For new designs or long-term production requirements, active substitutes (OP467GPZ, OP470GPZ, OP482GPZ, OP497GPZ, AD713JNZ, NJM2060D#) are recommended. Obsolete substitutes (LM248N, LM348N STM) are suitable only for immediate replacement needs where existing inventory is available.

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