LF353N Equivalent & Substitute Parts Reference

Part Overview

The LF353N is a J-FET input operational amplifier manufactured by Texas Instruments, configured as a dual-channel (2 circuit) device in an 8-DIP package. This part is classified as obsolete, though 18,900 units remain in stock as new original inventory. The LF353N operates across a wide supply voltage range (10V to 36V) and is suitable for applications requiring low input bias current and moderate bandwidth performance. Due to its obsolete status, equivalent and substitute parts with active product status are available from Analog Devices Inc. and other manufacturers to support ongoing design requirements and procurement needs.

Key Parameters

Parameter	LF353N Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	2	—
Slew Rate	13	V/µs
Gain Bandwidth Product	4	MHz
Current - Input Bias	50	pA
Voltage - Input Offset	5	mV
Current - Supply	3.6 (x2 Channels)	mA
Voltage - Supply Span (Min)	10	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	0 to 70	°C
Package / Case	8-DIP (0.300", 7.62mm)	—
Mounting Type	Through Hole	—
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution of the LF353N is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Amplifier Type: J-FET input configuration
Number of Circuits: Dual-channel (2 circuits)
Package / Case: 8-DIP (0.300", 7.62mm)
Mounting Type: Through Hole
Voltage - Supply Span: Minimum 10V, Maximum 36V or greater
Operating Temperature Range: 0°C to 70°C or extended range

Secondary Compatibility Parameters:

Slew Rate: 13 V/µs or greater
Gain Bandwidth Product: 4 MHz or greater
Current - Input Bias: 50 pA or lower
Voltage - Input Offset: 5 mV or lower
Current - Supply: 3.6 mA per channel or lower

Substitute parts are grouped into two categories:

Category 1: Direct Equivalents (Identical Electrical Performance) Parts that match or exceed all primary and secondary parameters with minimal deviation. These include LF353N/NOPB (Texas Instruments, active status) and AD712JNZ / AD712KNZ (Analog Devices Inc., active status).

Category 2: Functional Substitutes (Enhanced Performance) Parts that exceed the LF353N specifications in one or more parameters while maintaining full compatibility with the 8-DIP package and supply voltage requirements. These include AD648JNZ, AD648KNZ, AD746JNZ, LT1113ACN8#PBF, LT1113CN8#PBF, LT1169CN8#PBF, and LT1462ACN8#PBF.

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (mV/µV)	Supply Current (mA)	Supply Span Min (V)	Supply Span Max (V)	Temp Range (°C)	RoHS Status
LF353N	Texas Instruments	Obsolete	13	4	50	5 mV	3.6	10	36	0 to 70	Non-compliant
LF353N/NOPB	Texas Instruments	Active	13	4	50	5 mV	3.6	10	36	0 to 70	ROHS3 Compliant
AD648JNZ	Analog Devices Inc.	Active	1.8	1	5	750 µV	0.34	9	36	0 to 70	ROHS3 Compliant
AD648KNZ	Analog Devices Inc.	Active	1.8	1	3	300 µV	0.34	9	36	0 to 70	ROHS3 Compliant
AD712JNZ	Analog Devices Inc.	Active	20	4	25	300 µV	5	9	36	0 to 70	ROHS3 Compliant
AD712KNZ	Analog Devices Inc.	Active	20	4	25	300 µV	5	9	36	0 to 70	ROHS3 Compliant
AD746JNZ	Analog Devices Inc.	Active	75	13	110	300 µV	7	9	36	0 to 70	ROHS3 Compliant
LT1113ACN8#PBF	Analog Devices Inc.	Active	3.9	5.6	300	450 µV	5.3	9	40	-40 to 85	ROHS3 Compliant
LT1113CN8#PBF	Analog Devices Inc.	Active	3.9	5.6	300	550 µV	5.3	9	40	-40 to 85	ROHS3 Compliant
LT1169CN8#PBF	Analog Devices Inc.	Active	4.2	5.3	4	600 µV	5.3	9	40	0 to 70	ROHS3 Compliant
LT1462ACN8#PBF	Analog Devices Inc.	Active	0.13	0.175	1	600 µV	0.028	10	30	0 to 70	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Pin-Compatible, Identical Performance):

LF353N/NOPB is the recommended direct substitute. This part maintains identical electrical specifications to the original LF353N while offering active product status and ROHS3 compliance. The transition from obsolete to active status ensures long-term availability and supply chain stability. Both parts are packaged in 8-DIP through-hole configuration and operate across the same supply voltage range (10V to 36V).

For Enhanced Performance Applications:

AD712JNZ and AD712KNZ provide superior slew rate performance (20 V/µs versus 13 V/µs) while maintaining the 4 MHz gain bandwidth product. These parts are suitable for applications requiring faster transient response. Both are ROHS3 compliant and active products.

AD746JNZ offers the highest bandwidth (13 MHz) and slew rate (75 V/µs) among available substitutes, suitable for high-speed signal processing applications. This part maintains full 8-DIP package compatibility and active product status.

For Low-Power Applications:

LT1462ACN8#PBF is specified for ultra-low supply current (28 µA per channel) compared to the LF353N (3.6 mA per channel). This part is appropriate for battery-powered or power-constrained designs. Note that bandwidth and slew rate are significantly reduced (175 kHz and 0.13 V/µs respectively).

For Extended Temperature Range:

LT1113ACN8#PBF and LT1113CN8#PBF support operating temperatures from -40°C to 85°C, compared to the LF353N range of 0°C to 70°C. These parts are suitable for industrial and automotive applications requiring extended temperature operation.

Compliance Considerations:

All recommended substitutes are ROHS3 compliant, addressing regulatory requirements that the original LF353N does not meet. For applications in regulated industries or new designs, ROHS3-compliant alternatives are mandatory.

Frequently Asked Questions (FAQ)

Q1: Can LF353N/NOPB be used as a direct drop-in replacement for LF353N?

A: Yes. LF353N/NOPB is electrically and mechanically identical to LF353N. Both parts feature the same 8-DIP package, identical pin configuration, and matching electrical specifications (13 V/µs slew rate, 4 MHz gain bandwidth product, 50 pA input bias current). The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 compliant versus non-compliant). No circuit modifications are required.

Q2: What are the key differences between AD712JNZ and the original LF353N?

A: AD712JNZ exceeds LF353N performance in slew rate (20 V/µs versus 13 V/µs) and input bias current (25 pA versus 50 pA). Both parts maintain 4 MHz gain bandwidth product and 8-DIP package compatibility. AD712JNZ is ROHS3 compliant and active status. Supply current is slightly higher (5 mA versus 3.6 mA). AD712JNZ is suitable for applications requiring faster signal response without bandwidth limitations.

Q3: Is AD746JNZ compatible with LF353N circuits?

A: AD746JNZ is mechanically compatible (8-DIP package, through-hole mounting) and electrically compatible within the supply voltage range (9V to 36V). However, AD746JNZ offers significantly enhanced performance: 75 V/µs slew rate and 13 MHz bandwidth compared to LF353N's 13 V/µs and 4 MHz. Input bias current is higher (110 pA versus 50 pA). AD746JNZ is suitable for high-speed applications but may introduce different circuit behavior in bandwidth-limited designs. Verification of circuit performance is necessary when upgrading to this part.

Q4: Can LT1462ACN8#PBF replace LF353N in all applications?

A: LT1462ACN8#PBF is mechanically compatible (8-DIP package) but offers significantly reduced bandwidth (175 kHz versus 4 MHz) and slew rate (0.13 V/µs versus 13 V/µs). This part is suitable only for low-frequency, low-power applications. The supply voltage range differs (10V to 30V versus 10V to 36V). LT1462ACN8#PBF is not a general-purpose replacement but rather a specialized alternative for ultra-low-power designs.

Q5: What is the difference between AD648JNZ and AD648KNZ?

A: Both parts are identical except for input offset voltage specifications. AD648KNZ specifies 300 µV input offset voltage, while AD648JNZ specifies 750 µV. AD648KNZ represents a tighter tolerance grade. Both parts feature 1 MHz bandwidth, 1.8 V/µs slew rate, and ultra-low supply current (340 µA per channel). Selection depends on offset voltage requirements for the specific application.

Q6: Why do LT1113 parts have extended temperature range (-40°C to 85°C)?

A: LT1113ACN8#PBF and LT1113CN8#PBF are specified for industrial and automotive temperature ranges. The LF353N operates only from 0°C to 70°C. Extended temperature operation requires additional manufacturing screening and characterization. These parts are suitable for applications in harsh environments or temperature-variable conditions. All other electrical specifications remain compatible with LF353N requirements.

Q7: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts (LF353N/NOPB, AD648JNZ, AD648KNZ, AD712JNZ, AD712KNZ, AD746JNZ, LT1113ACN8#PBF, LT1113CN8#PBF, LT1169CN8#PBF, and LT1462ACN8#PBF) are ROHS3 compliant. The original LF353N is RoHS non-compliant. For new designs or regulated applications, ROHS3-compliant alternatives are required.

Q8: What is the supply voltage compatibility range for substitutes?

A: The LF353N operates from 10V to 36V. Most substitutes (LF353N/NOPB, AD648JNZ, AD648KNZ, AD712JNZ, AD712KNZ, AD746JNZ, LT1113ACN8#PBF, LT1113CN8#PBF, LT1169CN8#PBF) support 9V to 36V or 9V to 40V, providing broader compatibility. LT1462ACN8#PBF operates from 10V to 30V, which is more restrictive. Verify supply voltage requirements before selection.

Q9: Which substitute offers the best input bias current performance?

A: LT1462ACN8#PBF specifies 1 pA input bias current, the lowest among all options. LT1169CN8#PBF specifies 4 pA. AD648KNZ specifies 3 pA. For applications requiring minimal input bias current, these parts are preferred. The original LF353N specifies 50 pA, which is significantly higher.

Q10: Can multiple substitute parts be used interchangeably in the same design?

A: No. While all substitutes share 8-DIP package compatibility and J-FET amplifier architecture, electrical performance varies significantly. Substitutes with different bandwidth, slew rate, or supply current specifications will produce different circuit behavior. Select a single substitute part based on application requirements and verify circuit performance. Mixing different substitute parts in the same design is not recommended without comprehensive testing.

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