OP497FS Equivalent & Substitute Parts

Part Overview

The OP497FS is a general purpose operational amplifier integrated circuit manufactured by Analog Devices Inc., configured as a 4-circuit device in a 16-SOIC surface mount package. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement requirements. The OP497FS operates across a wide supply voltage range of 4V to 40V with an operating temperature range of -40°C to 85°C, making it suitable for diverse analog signal processing applications.

Key Parameters

Parameter	Value
Amplifier Type	General Purpose
Number of Circuits	4
Slew Rate	0.15 V/µs
Gain Bandwidth Product	500 kHz
Current - Input Bias	40 pA
Voltage - Input Offset	40 µV
Current - Supply (x4 Channels)	525 µA
Current - Output / Channel	25 mA
Voltage - Supply Span (Min)	4 V
Voltage - Supply Span (Max)	40 V
Operating Temperature	-40°C to 85°C
Package / Case	16-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the OP497FS is determined by compatibility across the following critical parameters: amplifier type classification, number of integrated circuits, package form factor, mounting technology, and electrical performance specifications including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, output current capability, and supply voltage range.

The substitute parts are grouped into two categories based on functional equivalence:

Direct Equivalent (Same Amplifier Type): OP497FSZ maintains identical electrical specifications and general purpose amplifier classification as the OP497FS, differing only in product status (active versus obsolete) and packaging format (tube versus unspecified).

Functional Alternatives (Different Amplifier Type): The LT1058 series (LT1058ISW, LT1058ISW#PBF, LT1058ISW#TRPBF, LT1058SW#PBF, LT1058SW#TRPBF) and LT1125 series (LT1125CSW, LT1125CSW#PBF, LT1125CSW#TRPBF) provide alternative operational amplifier solutions with enhanced performance characteristics. The LT1058 series utilizes J-FET input technology, while the LT1125 series maintains general purpose classification. The LT1127CSW#PBF represents a high-performance general purpose alternative with extended bandwidth.

All substitute candidates share the 16-SOIC package form factor, surface mount technology, and MSL 1 moisture sensitivity rating. Selection among substitutes depends on application-specific requirements for slew rate, bandwidth, input bias current, supply voltage range, and operating temperature specifications.

Parameter Comparison

Parameter	OP497FS	OP497FSZ	LT1058ISW	LT1058ISW#PBF	LT1058ISW#TRPBF	LT1058SW#PBF	LT1058SW#TRPBF	LT1125CSW	LT1125CSW#PBF	LT1125CSW#TRPBF	LT1127CSW#PBF
Amplifier Type	General Purpose	General Purpose	J-FET	J-FET	J-FET	J-FET	J-FET	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
Slew Rate	0.15 V/µs	0.15 V/µs	13 V/µs	13 V/µs	13 V/µs	13 V/µs	13 V/µs	4.5 V/µs	4.5 V/µs	4.5 V/µs	11 V/µs
Gain Bandwidth Product	500 kHz	500 kHz	5 MHz	5 MHz	5 MHz	5 MHz	5 MHz	12.5 MHz	12.5 MHz	12.5 MHz	65 MHz
Current - Input Bias	40 pA	40 pA	10 pA	10 pA	10 pA	10 pA	10 pA	8 nA	8 nA	8 nA	8 nA
Voltage - Input Offset	40 µV	40 µV	350 µV	350 µV	350 µV	350 µV	350 µV	30 µV	30 µV	30 µV	30 µV
Current - Supply (x4 Channels)	525 µA	525 µA	1.7 mA	1.7 mA	1.7 mA	1.7 mA	1.7 mA	2.3 mA	2.3 mA	2.3 mA	2.6 mA
Current - Output / Channel	25 mA	25 mA	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified
Voltage - Supply Span (Min)	4 V	4 V	20 V	20 V	20 V	20 V	20 V	8 V	8 V	8 V	8 V
Voltage - Supply Span (Max)	40 V	40 V	36 V	36 V	36 V	36 V	36 V	44 V	44 V	44 V	36 V
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	0°C to 70°C	0°C to 70°C	0°C to 70°C	0°C to 70°C	0°C to 70°C	-40°C to 85°C
Package / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Last Time Buy
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement: OP497FSZ is the primary direct substitute for OP497FS. Both parts maintain identical electrical specifications and general purpose amplifier classification. OP497FSZ carries active product status and ROHS3 compliance, providing continuity for designs currently utilizing OP497FS. The packaging difference (tube format for OP497FSZ) does not affect electrical compatibility.

Extended Temperature Range Applications: For applications requiring the full -40°C to 85°C operating temperature range, OP497FSZ and LT1127CSW#PBF are the appropriate selections. LT1127CSW#PBF offers significantly enhanced performance with 11 V/µs slew rate and 65 MHz gain bandwidth product while maintaining the extended temperature specification and ROHS3 compliance.

Low Supply Voltage Applications: OP497FS and OP497FSZ support minimum supply voltage of 4V, which is lower than most substitute options. The LT1125 series supports 8V minimum, while the LT1058 series requires 20V minimum. For applications operating below 8V supply, OP497FSZ remains the only viable substitute.

High Supply Voltage Applications: LT1125CSW variants support maximum supply voltage of 44V, exceeding the 40V maximum of OP497FS. This provides additional design flexibility for high-voltage applications.

Compliance and Certification: All active substitute parts carry ROHS3 compliance and REACH unaffected status. OP497FSZ, LT1058 series, and LT1125 series all meet current environmental and regulatory requirements. LT1127CSW#PBF carries Last Time Buy status, indicating limited future availability.

Packaging Format Considerations: All substitute parts are available in 16-SOIC surface mount package. Selection among tube, tape & reel, and unspecified packaging formats depends on procurement and assembly requirements rather than electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can OP497FSZ be used as a direct replacement for OP497FS in existing designs?

A: Yes. OP497FSZ is electrically identical to OP497FS across all specified parameters including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, output current, and supply voltage range. Both operate across -40°C to 85°C. The only differences are product status (active versus obsolete) and packaging format (tube). No circuit modifications are required.

Q: What is the primary advantage of LT1058 series substitutes over OP497FS?

A: The LT1058 series utilizes J-FET input technology, providing significantly improved slew rate (13 V/µs versus 0.15 V/µs) and gain bandwidth product (5 MHz versus 500 kHz). Input bias current is also lower (10 pA versus 40 pA). However, LT1058 variants require minimum supply voltage of 20V, which is higher than OP497FS (4V minimum). Input offset voltage is higher (350 µV versus 40 µV). These parts are suitable for applications requiring higher bandwidth and faster signal processing with adequate supply voltage.

Q: When should LT1125 series parts be selected?

A: LT1125 series parts offer improved performance over OP497FS with 4.5 V/µs slew rate and 12.5 MHz gain bandwidth product, while maintaining general purpose amplifier classification. Input offset voltage is superior (30 µV versus 40 µV). Supply voltage range is 8V to 44V, providing greater flexibility than OP497FS (4V to 40V). However, operating temperature is limited to 0°C to 70°C, which is narrower than OP497FS (-40°C to 85°C). LT1125 variants are suitable for commercial temperature range applications requiring enhanced bandwidth.

Q: What are the supply voltage compatibility constraints when selecting substitutes?

A: OP497FS and OP497FSZ support 4V to 40V supply range. LT1125 series supports 8V to 44V. LT1058 series supports 20V to 36V. LT1127CSW#PBF supports 8V to 36V. Applications operating below 8V supply voltage must use OP497FS or OP497FSZ. Applications requiring supply voltages above 40V must use LT1125 series. Applications requiring both low supply voltage (below 8V) and high bandwidth cannot be satisfied by any listed substitute.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts (OP497FSZ, LT1058 series, LT1125 series) are ROHS3 compliant. OP497FS compliance status is not specified. LT1127CSW#PBF is ROHS3 compliant but carries Last Time Buy status, indicating limited future procurement availability.

Q: What is the significance of packaging format differences (tube, tape & reel, unspecified)?

A: Packaging format affects procurement and assembly processes but does not impact electrical performance or circuit compatibility. Tube packaging is suitable for lower-volume applications and manual assembly. Tape & reel format is optimized for high-volume automated assembly. Selection depends on production volume and assembly equipment capabilities rather than technical specifications.

Q: Can LT1127CSW#PBF be used despite Last Time Buy status?

A: LT1127CSW#PBF is functionally compatible with OP497FS and offers superior performance (11 V/µs slew rate, 65 MHz bandwidth, extended temperature range). However, Last Time Buy status indicates that Analog Devices will discontinue production after a specified date. New designs should avoid this part. Existing inventory may be available for limited-duration support of legacy designs.

Q: What input bias current differences should be considered?

A: OP497FS specifies 40 pA input bias current. LT1058 series specifies 10 pA (lower). LT1125 and LT1127 series specify 8 nA (significantly higher). For applications sensitive to input bias current effects, such as high-impedance signal sources or precision integrators, the lower bias current of LT1058 series may be advantageous. For most general purpose applications, these differences are negligible.

Q: Are there supply current differences that affect power consumption?

A: OP497FS draws 525 µA total supply current (4 channels). LT1058 series draws 1.7 mA (approximately 3.2 times higher). LT1125 series draws 2.3 mA (approximately 4.4 times higher). LT1127CSW#PBF draws 2.6 mA (approximately 5 times higher). For battery-powered or power-constrained applications, OP497FS and OP497FSZ offer significant power consumption advantage.

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