LT1465CS Equivalent & Substitute Parts

Part Overview

The LT1465CS is a J-FET input operational amplifier manufactured by Analog Devices Inc., configured as a 4-circuit integrated circuit in a 14-SOIC surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited availability. The LT1465CS operates across a supply voltage range of 10V to 30V with an operating temperature range of -40°C to 85°C, making it suitable for precision analog signal conditioning applications requiring low input bias current and low input offset voltage characteristics inherent to J-FET amplifier topology.

Due to Last Time Buy status, alternative equivalent and substitute parts are necessary to ensure design continuity and long-term component availability for new production and maintenance applications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	4	—
Slew Rate	0.9	V/µs
Gain Bandwidth Product	1	MHz
Current - Input Bias	0.5	pA
Voltage - Input Offset	600	µV
Current - Supply (x4 Channels)	145	µA
Voltage - Supply Span (Min)	10	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	-40 to 85	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LT1465CS is determined by strict alignment of electrical and mechanical parameters within the J-FET amplifier category. The critical substitution criteria are:

Primary Substitution Criteria:

Amplifier Type: J-FET (required for input bias current and offset voltage characteristics)
Number of Circuits: 4 (functional equivalence)
Package / Case: 14-SOIC (0.154", 3.90mm Width) (mechanical compatibility)
Mounting Type: Surface Mount (assembly compatibility)
Operating Temperature Range: -40°C to 85°C minimum (thermal compatibility)
Voltage - Supply Span: Minimum 10V to Maximum 30V overlap (power supply compatibility)

Secondary Compatibility Parameters:

Slew Rate: 0.9V/µs or higher (performance equivalence)
Gain Bandwidth Product: 1 MHz or higher (frequency response equivalence)
Current - Input Bias: 0.5 pA or lower (input impedance equivalence)
Voltage - Input Offset: 600 µV or lower (precision equivalence)

Substitute parts are grouped into two categories: Direct Packaging Equivalents (identical packaging and product status) and Performance-Enhanced Alternatives (improved electrical specifications with compatible package and thermal ratings).

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Circuits	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (µA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	Product Status
LT1465CS	Analog Devices	J-FET	4	0.9	1	0.5	600	145	10	30	-40 to 85	14-SOIC	Last Time Buy
LT1465CS#PBF	Analog Devices	J-FET	4	0.9	1	0.5	600	145	10	30	-40 to 85	14-SOIC	Active
AD8684ARZ	Analog Devices	J-FET	4	9	3.5	6	350	210	9	36	-40 to 85	14-SOIC	Active
AD8684ARZ-REEL	Analog Devices	J-FET	4	9	3.5	6	350	210	9	36	-40 to 85	14-SOIC	Active
AD8684ARZ-REEL7	Analog Devices	J-FET	4	9	3.5	6	350	210	9	36	-40 to 85	14-SOIC	Active
OP482GSZ	Analog Devices	J-FET	4	9	4	3	200	210	9	36	-40 to 85	14-SOIC	Active
OP482GSZ-REEL	Analog Devices	J-FET	4	9	4	3	200	210	9	36	-40 to 85	14-SOIC	Active
OP482GSZ-REEL7	Analog Devices	J-FET	4	9	4	3	200	210	9	36	-40 to 85	14-SOIC	Active
LM224AD	STMicroelectronics	General Purpose	4	0.4	1.2	20000	2000	1500	3	30	-40 to 105	14-SOIC	Obsolete
LM224ADR	Texas Instruments	General Purpose	4	0.5	1.2	15000	2000	1400	3	30	-25 to 85	14-SOIC	Active
LM224ADRG4	Texas Instruments	General Purpose	4	0.5	1.2	15000	2000	1400	3	30	-25 to 85	14-SOIC	Obsolete

Engineering Selection Recommendations

Tier 1: Direct Equivalent (Recommended Primary Substitute)

LT1465CS#PBF is the direct equivalent to LT1465CS, manufactured by Analog Devices Inc. with identical electrical specifications and 14-SOIC package configuration. This part maintains Active product status with higher inventory availability (5145 units) compared to the Last Time Buy LT1465CS (1220 units). The #PBF suffix indicates lead-free RoHS3 compliance, matching the original part's environmental certification. This substitution requires no circuit redesign and maintains full electrical and thermal compatibility.

Tier 2: Performance-Enhanced J-FET Alternatives (Compatible Substitutes)

The AD8684ARZ, AD8684ARZ-REEL, and AD8684ARZ-REEL7 variants provide enhanced performance characteristics while maintaining J-FET amplifier topology and 14-SOIC package compatibility. These parts feature improved slew rate (9V/µs versus 0.9V/µs), higher gain bandwidth product (3.5 MHz versus 1 MHz), and lower input offset voltage (350 µV versus 600 µV). Supply voltage range extends to 9V minimum and 36V maximum, providing broader operational flexibility. All variants maintain -40°C to 85°C operating temperature range and Active product status with substantial inventory availability (4700 to 767 units depending on packaging variant).

The OP482GSZ, OP482GSZ-REEL, and OP482GSZ-REEL7 variants offer the highest performance enhancement with 4 MHz gain bandwidth product, 3 pA input bias current, and 200 µV input offset voltage. These parts maintain identical package and thermal specifications with Active product status and highest inventory availability (23547 to 2300 units depending on packaging variant).

Tier 3: General Purpose Alternatives (Limited Compatibility)

LM224ADR (Texas Instruments, Active status) and LM224AD (STMicroelectronics, Obsolete status) are general purpose amplifiers with 4-circuit configuration and 14-SOIC package compatibility. These parts do not maintain J-FET amplifier topology, resulting in significantly higher input bias current (15 nA to 20 nA versus 0.5 pA) and higher input offset voltage (2 mV versus 600 µV). These characteristics make them unsuitable for applications requiring the precision input characteristics of J-FET amplifiers. LM224ADR maintains Active product status but operates at reduced temperature range (-25°C to 85°C versus -40°C to 85°C). LM224ADRG4 is Obsolete and not recommended for new designs.

Compliance and Certification:

All recommended substitute parts maintain ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and REACH Unaffected status, matching the original LT1465CS environmental and regulatory certifications.

Frequently Asked Questions (FAQ)

Q: Can LT1465CS#PBF be used as a direct replacement for LT1465CS?

A: Yes. LT1465CS#PBF is the direct equivalent with identical electrical specifications, package configuration, and thermal ratings. The only difference is product status (Active versus Last Time Buy) and packaging format (Tube). No circuit modifications are required.

Q: What is the primary difference between LT1465CS and AD8684ARZ?

A: Both are J-FET amplifiers in 14-SOIC packages with 4 circuits. AD8684ARZ provides enhanced performance: 10× faster slew rate (9V/µs versus 0.9V/µs), 3.5× higher gain bandwidth product (3.5 MHz versus 1 MHz), and lower input offset voltage (350 µV versus 600 µV). AD8684ARZ also supports lower minimum supply voltage (9V versus 10V) and higher maximum supply voltage (36V versus 30V). These improvements make AD8684ARZ suitable for higher-speed applications while maintaining J-FET input characteristics.

Q: Are the AD8684ARZ packaging variants (standard, REEL, REEL7) electrically identical?

A: Yes. AD8684ARZ, AD8684ARZ-REEL, and AD8684ARZ-REEL7 are electrically identical with identical electrical specifications and thermal ratings. Differences are limited to packaging format: Tube, Tape & Reel (TR), and Tape & Reel (TR) with 7-inch reel respectively. Selection depends on assembly equipment compatibility and inventory management requirements.

Q: Why are LM224 series parts listed as limited compatibility?

A: LM224 series parts use general purpose amplifier topology rather than J-FET topology. This results in input bias current of 15 nA to 20 nA (versus 0.5 pA for LT1465CS) and input offset voltage of 2 mV (versus 600 µV for LT1465CS). Applications requiring precision input characteristics, high input impedance, or low input bias current cannot use LM224 series substitutes. LM224 series are listed for reference only and are not recommended as functional equivalents.

Q: What packaging options are available for J-FET 4-circuit amplifier substitutes?

A: All recommended J-FET substitutes (LT1465CS#PBF, AD8684ARZ variants, OP482GSZ variants) use 14-SOIC (0.154", 3.90mm Width) surface mount package. Packaging format options include Tube, Cut Tape (CT) & Digi-Reel®, and Tape & Reel (TR) variants. All maintain identical electrical and thermal specifications; selection depends on assembly process requirements and component handling equipment.

Q: Is OP482GSZ a suitable substitute for LT1465CS?

A: Yes. OP482GSZ is a J-FET amplifier with 4 circuits in 14-SOIC package, maintaining -40°C to 85°C operating temperature range and Active product status. OP482GSZ provides superior performance with 4 MHz gain bandwidth product, 3 pA input bias current, and 200 µV input offset voltage. Supply voltage range (9V to 36V) exceeds LT1465CS requirements (10V to 30V). OP482GSZ is suitable for applications requiring enhanced performance while maintaining J-FET input characteristics and package compatibility.

Q: What is the inventory status of substitute parts?

A: LT1465CS#PBF (5145 units) provides the highest availability among direct equivalents. Performance-enhanced alternatives include AD8684ARZ variants (767 to 4700 units) and OP482GSZ variants (2300 to 23547 units). General purpose alternatives LM224ADR (133500 units) and LM224AD (1980 units) have higher inventory but are not recommended due to topology differences. Inventory quantities reflect current stock status and are subject to change.

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