LM7301IM/NOPB Equivalent & Substitute Parts

Part Overview

The LM7301IM/NOPB is a general-purpose operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device features rail-to-rail output capability and operates across a wide supply voltage range of 1.8V to 32V. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility while meeting current availability and compliance standards.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	1.25	V/µs
Gain Bandwidth Product	4	MHz
Current - Input Bias	103	nA
Voltage - Input Offset	40	µV
Current - Supply	720	µA
Voltage - Supply Span (Min)	1.8	V
Voltage - Supply Span (Max)	32	V
Operating Temperature Range	-40 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the LM7301IM/NOPB are grouped based on strict adherence to the following critical parameters:

Primary Substitution Criteria:

Package compatibility: 8-SOIC form factor (0.154", 3.90mm Width)
Output configuration: Rail-to-rail output
Single circuit topology
Surface mount mounting type
Supply voltage range: minimum 1.8V to 32V maximum
Operating temperature range coverage

Grouping Logic:

Group 1: Direct Manufacturer Equivalent (Texas Instruments) LM7301IMX/NOPB maintains identical electrical specifications and differs only in packaging format (Tape & Reel versus Tube). This part is active and provides direct functional replacement.

Group 2: Analog Devices LT1494 Series (Active Status) LT1494CS8#PBF, LT1494CS8#TRPBF, LT1494HS8#PBF, and LT1494IS8#PBF share the 8-SOIC package, rail-to-rail output, and single-circuit configuration. These parts operate within the required supply voltage range (2.2V to 36V encompasses the LM7301IM/NOPB range). Temperature grade variants (C, H, I) provide options for different operating environments.

Group 3: Analog Devices LT1672 Series (Active/Last Time Buy Status) LT1672CS8#PBF and LT1672IS8#PBF maintain package compatibility and rail-to-rail output. These parts feature enhanced gain-bandwidth product (12 kHz versus 2.7 kHz in LT1494 series) and marginally higher slew rate (0.005V/µs).

Group 4: Analog Devices OP184 Series (Active Status) OP184ESZ, OP184ESZ-REEL7, and OP184FSZ provide 8-SOIC packaging with rail-to-rail output and superior performance characteristics including higher slew rate (4V/µs) and gain-bandwidth product (4.25 MHz). Supply voltage range (3V to 36V minimum) requires verification for applications below 3V.

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	GBW (MHz/kHz)	Input Bias (nA/pA)	Input Offset (µV)	Supply Current (µA/mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package
LM7301IM/NOPB	Texas Instruments	Obsolete	1.25	4 MHz	103 nA	40	720 µA	1.8	32	-40 to 85	8-SOIC
LM7301IMX/NOPB	Texas Instruments	Active	1.25	4 MHz	103 nA	40	720 µA	1.8	32	-40 to 85	8-SOIC
LT1494CS8#PBF	Analog Devices Inc.	Active	0.001	2.7 kHz	25 pA	200	1.4 µA	2.2	36	0 to 70	8-SOIC
LT1494CS8#TRPBF	Analog Devices Inc.	Active	0.001	2.7 kHz	25 pA	200	1.4 µA	2.2	36	0 to 70	8-SOIC
LT1494HS8#PBF	Analog Devices Inc.	Active	0.001	2.7 kHz	25 pA	200	1.4 µA	2.2	36	-40 to 125	8-SOIC
LT1494IS8#PBF	Analog Devices Inc.	Active	0.001	2.7 kHz	25 pA	200	1.4 µA	2.2	36	-40 to 85	8-SOIC
LT1672CS8#PBF	Linear Technology	Active	0.005	12 kHz	25 pA	200	1.9 µA	2.2	36	0 to 70	8-SOIC
LT1672IS8#PBF	Analog Devices Inc.	Last Time Buy	0.005	12 kHz	25 pA	200	1.9 µA	2.2	36	-40 to 85	8-SOIC
OP184ESZ	Analog Devices Inc.	Active	4	4.25 MHz	80 nA	100	2.25 mA	3	36	-40 to 125	8-SOIC
OP184ESZ-REEL7	Analog Devices Inc.	Active	4	4.25 MHz	80 nA	100	2.25 mA	3	36	-40 to 125	8-SOIC
OP184FSZ	Analog Devices Inc.	Active	4	4.25 MHz	80 nA	175	2.25 mA	3	36	-40 to 125	8-SOIC

Engineering Selection Recommendations

Tier 1: Direct Replacement (Recommended for Existing Designs)

LM7301IMX/NOPB is the primary substitute. This Texas Instruments part maintains identical electrical specifications and operating characteristics as the obsolete LM7301IM/NOPB. The only difference is packaging format (Tape & Reel versus Tube). This part is active with 9,339 units in stock and carries ROHS3 compliance and MSL Level 1 rating. Selection of this part requires no circuit redesign or validation.

Tier 2: Functional Equivalents with Extended Temperature Range (Active Status)

LT1494HS8#PBF and OP184ESZ/OP184ESZ-REEL7/OP184FSZ are active parts suitable for applications requiring extended operating temperature coverage (-40°C to 125°C). Both maintain 8-SOIC packaging and rail-to-rail output. OP184 series offers superior performance metrics (4V/µs slew rate, 4.25 MHz gain-bandwidth product) compared to the original LM7301IM/NOPB. LT1494HS8#PBF provides lower supply current (1.4µA) and input bias current (25pA) at the cost of reduced slew rate and gain-bandwidth product.

Tier 3: Performance-Enhanced Alternatives (Active Status)

OP184ESZ and OP184ESZ-REEL7 provide the highest performance envelope with 4V/µs slew rate and 4.25 MHz gain-bandwidth product. These parts are suitable for applications where the original LM7301IM/NOPB performance is insufficient. Minimum supply voltage requirement is 3V; applications requiring operation below 3V must use Tier 1 or Tier 2 alternatives.

Tier 4: Low-Power Alternatives (Active/Last Time Buy Status)

LT1494 series (CS8#PBF, CS8#TRPBF, IS8#PBF) and LT1672 series (CS8#PBF, IS8#PBF) offer ultra-low supply current (1.4µA to 1.9µA) and input bias current (25pA). These parts are suitable for battery-powered and low-power applications. LT1672IS8#PBF carries Last Time Buy status; long-term availability is not assured.

Compliance and Certification:

All recommended substitutes carry ROHS3 compliance and MSL Level 1 rating, matching the original part's environmental certifications. REACH status is unaffected for all listed parts.

Frequently Asked Questions (FAQ)

Q1: Can LM7301IMX/NOPB be used as a direct drop-in replacement for LM7301IM/NOPB?

A: Yes. LM7301IMX/NOPB is electrically and functionally identical to LM7301IM/NOPB. The difference is packaging format: LM7301IMX/NOPB is supplied in Tape & Reel format while LM7301IM/NOPB was supplied in Tube format. Both use the same 8-SOIC package footprint. No circuit modifications are required.

Q2: What are the key differences between LT1494 and OP184 series substitutes?

A: LT1494 series prioritizes ultra-low power consumption (1.4µA supply current, 25pA input bias current) with reduced slew rate (0.001V/µs) and gain-bandwidth product (2.7 kHz). OP184 series provides higher performance (4V/µs slew rate, 4.25 MHz gain-bandwidth product) with increased supply current (2.25mA). Selection depends on application requirements: low-power applications favor LT1494; high-speed or high-current applications favor OP184.

Q3: Are there supply voltage compatibility issues when substituting with OP184 series?

A: OP184 series requires minimum 3V supply voltage, while LM7301IM/NOPB operates from 1.8V minimum. Applications requiring operation below 3V must use LM7301IMX/NOPB, LT1494 series, or LT1672 series, which all support 2.2V minimum supply voltage.

Q4: What is the significance of temperature grade designations (C, H, I) in LT1494 part numbers?

A: Temperature grade designates the operating temperature range: C-grade operates 0°C to 70°C; H-grade operates -40°C to 125°C; I-grade operates -40°C to 85°C. Selection should match application temperature requirements. LM7301IM/NOPB operates -40°C to 85°C, making LT1494IS8#PBF the temperature-matched LT1494 variant.

Q5: What is the difference between OP184ESZ and OP184ESZ-REEL7?

A: Both parts are electrically identical. OP184ESZ is supplied in Tube packaging; OP184ESZ-REEL7 is supplied in Cut Tape & Digi-Reel format. Selection depends on assembly process requirements. OP184ESZ-REEL7 has higher inventory (36,612 units) compared to OP184ESZ (18,442 units).

Q6: Can LT1672 series be used as a substitute for LM7301IM/NOPB?

A: LT1672 series maintains package compatibility and rail-to-rail output but exhibits different electrical characteristics: lower slew rate (0.005V/µs versus 1.25V/µs) and lower gain-bandwidth product (12 kHz versus 4 MHz). LT1672IS8#PBF carries Last Time Buy status, indicating discontinued production. Use only if application performance requirements are compatible with LT1672 specifications.

Q7: What does "Last Time Buy" status mean for LT1672IS8#PBF?

A: Last Time Buy indicates the manufacturer has announced end-of-life for this part. Current inventory (1,062 units) represents the final available stock. After depletion, the part will not be restocked. For new designs or long-term production, select active-status alternatives such as LT1494IS8#PBF or OP184ESZ.

Q8: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts carry ROHS3 compliance certification, matching the original LM7301IM/NOPB compliance status. Moisture Sensitivity Level is 1 (Unlimited) for all parts except LT1672CS8#PBF, which shows vendor-undefined MSL rating.

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