LT1464CS8 Equivalent & Substitute Parts

Part Overview

The LT1464CS8 is a J-FET input operational amplifier manufactured by Analog Devices Inc., configured as a dual-channel (2 circuit) device in an 8-SOIC surface mount package. This linear amplifier is classified as Active product status and is ROHS3 compliant. The LT1464CS8 serves applications requiring low input bias current and low input offset voltage characteristics typical of J-FET amplifier designs. Equivalent and substitute parts are identified based on matching or exceeding electrical performance parameters while maintaining compatible packaging and operating specifications.

Key Parameters

Parameter	LT1464CS8 Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	2	—
Slew Rate	0.9	V/µs
Gain Bandwidth Product	1	MHz
Current - Input Bias	0.5	pA
Voltage - Input Offset	600	µV
Current - Supply (x2 Channels)	145	µA
Voltage - Supply Span (Min)	10	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	-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 LT1464CS8 are grouped based on the following substitution criteria:

Direct Equivalent (Identical Specifications): Parts that maintain all electrical and mechanical parameters of the LT1464CS8, differing only in packaging format (tube versus reel).

Functional Equivalent (Enhanced Performance): Parts that maintain J-FET amplifier topology with 2 circuits in 8-SOIC packaging but feature improved electrical performance in one or more parameters including slew rate, gain bandwidth product, input bias current, or supply current. These parts operate within compatible voltage supply ranges and temperature specifications.

Key Substitution Parameters:

Amplifier Type: J-FET (maintained across all substitutes)
Number of Circuits: 2 (maintained across all substitutes)
Package / Case: 8-SOIC (maintained across all substitutes)
Mounting Type: Surface Mount (maintained across all substitutes)
Voltage - Supply Span: Minimum 9V to 10V; Maximum 30V to 36V (compatible ranges)
Operating Temperature: 0°C to 70°C or -40°C to 85°C (compatible ranges)
RoHS Status: ROHS3 Compliant (maintained across all substitutes)

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
LT1464CS8	Analog Devices	J-FET	2	0.9	1	0.5	600	145	10	30	-40 to 85	8-SOIC
LT1464CS8#PBF	Analog Devices	J-FET	2	0.9	1	0.5	600	145	10	30	-40 to 85	8-SOIC
AD648JRZ	Analog Devices	J-FET	2	1.8	1	5	750	340	9	36	0 to 70	8-SOIC
AD648KRZ	Analog Devices	J-FET	2	1.8	1	3	300	340	9	36	0 to 70	8-SOIC
AD712JRZ	Analog Devices	J-FET	2	20	—	25	300	5000	9	36	0 to 70	8-SOIC
AD712JRZ-REEL	Analog Devices	J-FET	2	20	—	25	300	5000	9	36	0 to 70	8-SOIC
AD712JRZ-REEL7	Analog Devices	J-FET	2	20	—	25	300	5000	9	36	0 to 70	8-SOIC
AD712KRZ	Analog Devices	J-FET	2	20	—	25	300	5000	9	36	0 to 70	8-SOIC
AD746JRZ	Analog Devices	J-FET	2	75	13	110	300	7000	9	36	0 to 70	8-SOIC
OP275GSZ	Analog Devices	Audio	2	22	9	100000	1000	4000	9	44	-40 to 85	8-SOIC
OP275GSZ-REEL	Analog Devices	Audio	2	22	9	100000	1000	4000	9	44	-40 to 85	8-SOIC

Engineering Selection Recommendations

Direct Equivalent Selection: LT1464CS8#PBF is a direct electrical and functional equivalent to LT1464CS8, differing only in packaging format (tube versus standard packaging). Both parts maintain identical electrical specifications and are ROHS3 compliant with Active product status. Selection between these two depends on procurement and assembly requirements.

Enhanced Performance Substitutes (J-FET Topology): The AD648 series (AD648JRZ, AD648KRZ) provides improved slew rate (1.8 V/µs versus 0.9 V/µs) while maintaining 1 MHz gain bandwidth product. AD648KRZ offers superior input offset voltage (300 µV versus 600 µV) and lower input bias current (3 pA versus 0.5 pA). Both operate within compatible supply voltage ranges (9V to 36V) and are ROHS3 compliant. Operating temperature range is 0°C to 70°C, narrower than the LT1464CS8.

The AD712 series (AD712JRZ, AD712JRZ-REEL, AD712JRZ-REEL7, AD712KRZ) provides significantly enhanced slew rate (20 V/µs) and -3dB bandwidth (4 MHz). These parts are suitable for applications requiring faster transient response. Supply current increases to 5 mA. All variants are ROHS3 compliant with 0°C to 70°C operating temperature.

The AD746JRZ offers the highest performance with 75 V/µs slew rate and 13 MHz gain bandwidth product, suitable for high-speed applications. Input bias current increases to 110 pA. ROHS3 compliant with 0°C to 70°C operating temperature.

Alternative Topology (Audio Amplifier): OP275GSZ and OP275GSZ-REEL are Audio amplifier devices with 2 circuits in 8-SOIC packaging. These parts feature higher input bias current (100 nA) and input offset voltage (1 mV) compared to J-FET designs, making them unsuitable as direct substitutes for precision J-FET applications. However, they provide extended operating temperature range (-40°C to 85°C) matching the LT1464CS8 and higher output current capability (90 mA per channel). ROHS3 compliant.

Compliance and Status: All listed substitute parts maintain ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and Active product status, ensuring long-term availability and regulatory alignment with the LT1464CS8.

Frequently Asked Questions (FAQ)

Q: Can AD648JRZ or AD648KRZ directly replace LT1464CS8 in all applications? A: AD648 series parts are functionally compatible in 8-SOIC packaging with J-FET topology and 2 circuits. However, operating temperature range differs (0°C to 70°C versus -40°C to 85°C). Verify application temperature requirements before substitution. Input bias current and input offset voltage specifications differ; applications sensitive to these parameters require evaluation.

Q: What is the difference between AD712JRZ, AD712JRZ-REEL, AD712JRZ-REEL7, and AD712KRZ? A: All four variants share identical electrical specifications (20 V/µs slew rate, 4 MHz bandwidth, 5 mA supply current). Differences are packaging format only: AD712JRZ and AD712KRZ are supplied in tube packaging; AD712JRZ-REEL and AD712JRZ-REEL7 are supplied in cut tape with Digi-Reel format. Selection depends on assembly equipment and procurement requirements.

Q: Why does OP275GSZ have higher input bias current than LT1464CS8? A: OP275GSZ is classified as an Audio amplifier rather than a J-FET precision amplifier. Audio amplifiers use different input stage topology, resulting in higher input bias current (100 nA versus 0.5 pA). OP275GSZ is not recommended for applications requiring low input bias current characteristics.

Q: Is LT1464CS8#PBF a true equivalent or a substitute? A: LT1464CS8#PBF is a direct equivalent. Both parts are manufactured by Analog Devices Inc. with identical electrical specifications, RoHS compliance, and product status. The only difference is packaging format (tube). Either part can be used interchangeably in circuit designs.

Q: Can I use AD746JRZ in place of LT1464CS8 for low-speed applications? A: AD746JRZ is electrically compatible in 8-SOIC packaging with J-FET topology and 2 circuits. However, AD746JRZ features significantly higher slew rate (75 V/µs), higher input bias current (110 pA), and higher supply current (7 mA). For low-speed applications, these enhanced specifications are unnecessary and result in higher power consumption. AD648 series provides more appropriate performance matching.

Q: What supply voltage range is compatible across all substitutes? A: The common supply voltage range across all J-FET substitutes is 9V to 30V. LT1464CS8 operates 10V to 30V; AD648, AD712, and AD746 series operate 9V to 36V. For designs operating below 10V, only AD648, AD712, and AD746 series are suitable.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts (LT1464CS8#PBF, AD648JRZ, AD648KRZ, AD712JRZ, AD712JRZ-REEL, AD712JRZ-REEL7, AD712KRZ, AD746JRZ, OP275GSZ, OP275GSZ-REEL) are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: Which substitute offers the best match for precision, low-noise applications? A: AD648KRZ provides the closest performance match to LT1464CS8 for precision applications, featuring lower input offset voltage (300 µV versus 600 µV) and lower input bias current (3 pA versus 0.5 pA). Operating temperature range is 0°C to 70°C. Verify temperature requirements for your application.

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