LT1125CSW Equivalent & Substitute Parts

Part Overview

The LT1125CSW 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 linear amplifier is classified as an active product with full RoHS3 compliance and REACH unaffected status. The LT1125CSW serves applications requiring quad operational amplifier functionality with moderate bandwidth and low input bias current characteristics. Substitute parts become necessary when specific packaging formats, inventory availability, or performance parameter variations align with application requirements while maintaining functional compatibility within the 16-SOIC package footprint.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Slew Rate	4.5	V/µs
Gain Bandwidth Product	12.5	MHz
Current - Input Bias	8	nA
Voltage - Input Offset	30	µV
Current - Supply (x4 Channels)	2.3	mA
Voltage - Supply Span (Min)	8	V
Voltage - Supply Span (Max)	44	V
Operating Temperature	0 to 70	°C
Package / Case	16-SOIC (0.295", 7.50mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the LT1125CSW are identified based on strict electrical and mechanical parameter compatibility within the following criteria:

Primary Compatibility Factors:

Package format: 16-SOIC (0.295", 7.50mm Width) surface mount configuration
Circuit count: 4 operational amplifier circuits per device
Amplifier classification: General Purpose
Compliance standards: RoHS3 Compliant, REACH Unaffected, ECCN EAR99
Moisture sensitivity: MSL 1 (Unlimited)

Electrical Parameter Ranges for Substitution:

Slew Rate: 0.1 to 4.5 V/µs
Gain Bandwidth Product: 500 kHz to 12.5 MHz
Input Bias Current: 8 nA to 100 pA
Input Offset Voltage: 30 to 80 µV
Supply Current: 525 µA to 2.3 mA (per 4 channels)
Supply Voltage Range: Minimum 4 to 8 V; Maximum 36 to 44 V
Operating Temperature: 0°C to 85°C (extended range acceptable)

Substitute parts maintain identical package geometry and pin configuration, enabling direct mechanical and electrical interchange in 16-SOIC surface mount applications. Variations in electrical performance parameters reflect different device grades and manufacturing series within the Analog Devices portfolio.

Parameter Comparison

Parameter	LT1125CSW	LT1125CSW#PBF	AD704JRZ-16	AD704JRZ-16-REEL	OP497FSZ	OP497FSZ-REEL	OP497GSZ	OP497GSZ-REEL
Manufacturer	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Number of Circuits	4	4	4	4	4	4	4	4
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Slew Rate (V/µs)	4.5	4.5	0.1	0.1	0.15	0.15	0.15	0.15
Gain Bandwidth Product (MHz)	12.5	12.5	0.8	0.8	0.5	0.5	0.5	0.5
Current - Input Bias (nA/pA)	8 nA	8 nA	100 pA	100 pA	40 pA	40 pA	60 pA	60 pA
Voltage - Input Offset (µV)	30	30	50	50	40	40	80	80
Current - Supply (mA x4 Channels)	2.3	2.3	1.5	1.5	0.525	0.525	0.525	0.525
Voltage - Supply Span Min (V)	8	8	4	4	4	4	4	4
Voltage - Supply Span Max (V)	44	44	36	36	40	40	40	40
Operating Temperature (°C)	0 to 70	0 to 70	0 to 70	0 to 70	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Package / Case	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Direct Packaging Equivalent: LT1125CSW#PBF represents the tube packaging variant of the base LT1125CSW device. Both parts share identical electrical specifications and are suitable for applications where packaging format does not impose constraints. Selection between these variants depends on procurement requirements and assembly processes.

Lower Bandwidth Substitutes (AD704 Series): The AD704JRZ-16 and AD704JRZ-16-REEL devices provide reduced bandwidth performance (800 kHz gain bandwidth product versus 12.5 MHz) with lower input bias current (100 pA versus 8 nA) and reduced supply current (1.5 mA versus 2.3 mA). These parts are suitable for applications where bandwidth requirements do not exceed 800 kHz and where lower power consumption is beneficial. The AD704 series maintains the 16-SOIC package format and operates within the 0°C to 70°C temperature range. Tape & Reel packaging (AD704JRZ-16-REEL) accommodates high-volume automated assembly processes.

Ultra-Low Power Substitutes (OP497 Series): The OP497FSZ, OP497FSZ-REEL, OP497GSZ, and OP497GSZ-REEL devices deliver significantly reduced supply current (525 µA versus 2.3 mA) with moderate bandwidth (500 kHz gain bandwidth product). The OP497 series operates across an extended temperature range (-40°C to 85°C) and maintains RoHS3 compliance. OP497FSZ variants feature 40 pA input bias current and 40 µV input offset voltage. OP497GSZ variants specify 60 pA input bias current and 80 µV input offset voltage. Reel packaging variants (OP497FSZ-REEL, OP497GSZ-REEL) support automated tape & reel assembly workflows. All OP497 devices are rated for supply voltages from 4 V to 40 V.

Compliance and Regulatory Status: All substitute parts maintain RoHS3 compliance, REACH unaffected status, ECCN EAR99 classification, and MSL 1 moisture sensitivity rating. All devices are classified as active products by Analog Devices Inc.

Frequently Asked Questions (FAQ)

Q: Can LT1125CSW#PBF be used as a direct replacement for LT1125CSW?

A: Yes. LT1125CSW#PBF is the tube-packaged variant of the LT1125CSW and shares identical electrical specifications, performance parameters, and compliance certifications. The only difference is the packaging format (tube versus standard packaging). Both parts are suitable for direct substitution in applications where packaging does not impose assembly constraints.

Q: What are the key differences between LT1125CSW and AD704JRZ-16?

A: The primary differences are bandwidth and input bias current. LT1125CSW provides 12.5 MHz gain bandwidth product and 8 nA input bias current, while AD704JRZ-16 provides 800 kHz gain bandwidth product and 100 pA input bias current. AD704JRZ-16 also draws lower supply current (1.5 mA versus 2.3 mA). Both devices operate in the 0°C to 70°C temperature range and use the 16-SOIC package. AD704JRZ-16 is suitable for applications where bandwidth requirements are below 800 kHz and lower power consumption is desired.

Q: Are OP497 devices suitable replacements for LT1125CSW?

A: OP497 devices (OP497FSZ, OP497FSZ-REEL, OP497GSZ, OP497GSZ-REEL) are mechanically compatible with LT1125CSW in the 16-SOIC package but have significantly different electrical characteristics. OP497 devices provide 500 kHz bandwidth, 525 µA supply current, and extended temperature operation (-40°C to 85°C). OP497 devices are suitable for applications where bandwidth requirements do not exceed 500 kHz and where ultra-low power consumption is critical. Applications requiring the 12.5 MHz bandwidth of LT1125CSW cannot use OP497 substitutes.

Q: What is the difference between tape & reel and tube packaging?

A: Tape & reel packaging (indicated by -REEL suffix) is designed for automated high-volume assembly processes using pick-and-place equipment. Tube packaging is suitable for manual assembly or lower-volume production. Both packaging formats contain identical devices with identical electrical specifications. Selection depends on manufacturing process requirements and assembly volume.

Q: Can I use OP497FSZ instead of OP497GSZ?

A: Both OP497FSZ and OP497GSZ are mechanically and functionally compatible in the 16-SOIC package. The primary difference is input bias current (40 pA for OP497FSZ versus 60 pA for OP497GSZ) and input offset voltage (40 µV for OP497FSZ versus 80 µV for OP497GSZ). OP497FSZ provides tighter input specifications. Selection depends on application precision requirements. Both devices share identical bandwidth (500 kHz), supply current (525 µA), and temperature range (-40°C to 85°C).

Q: What supply voltage range does each substitute support?

A: LT1125CSW and LT1125CSW#PBF support 8 V to 44 V supply range. AD704JRZ-16 and AD704JRZ-16-REEL support 4 V to 36 V supply range. OP497 series devices (OP497FSZ, OP497FSZ-REEL, OP497GSZ, OP497GSZ-REEL) support 4 V to 40 V supply range. Applications requiring supply voltages above 40 V must use LT1125CSW or LT1125CSW#PBF.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (LT1125CSW#PBF, AD704JRZ-16, AD704JRZ-16-REEL, OP497FSZ, OP497FSZ-REEL, OP497GSZ, OP497GSZ-REEL) are RoHS3 compliant with REACH unaffected status and MSL 1 moisture sensitivity rating.

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