LT1355CS8#TR Equivalent & Substitute Parts

Part Overview

The LT1355CS8#TR is a voltage feedback amplifier integrated circuit manufactured by Analog Devices Inc., containing two independent circuits in an 8-SOIC surface mount package. This device is classified as a linear amplifier and is currently in active product status. The LT1355CS8#TR operates across a supply voltage range of 5V to 30V with a slew rate of 400V/µs and a gain bandwidth product of 12 MHz, making it suitable for general-purpose signal conditioning and amplification applications.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design specifications allow for components with enhanced performance characteristics or extended operating temperature ranges.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Voltage Feedback	—
Number of Circuits	2	—
Slew Rate	400	V/µs
Gain Bandwidth Product	12	MHz
Current - Input Bias	80	nA
Voltage - Input Offset	300	µV
Current - Supply	1	mA (x2 Channels)
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	5	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	0 to 70	°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

Substitution of the LT1355CS8#TR is determined by compatibility across the following critical parameters: amplifier type (voltage feedback), number of circuits (2), package form factor (8-SOIC surface mount), and electrical operating ranges (supply voltage, slew rate, gain bandwidth product, input bias current, and output current capability).

The substitute parts are grouped into the following categories:

Direct Packaging Equivalent: LT1355CS8#TRPBF is an identical electrical specification variant of the LT1355CS8#TR, differing only in packaging format (Cut Tape & Digi-Reel versus standard tape and reel).

Voltage Feedback Amplifiers with Enhanced Performance: ADA4898-2YRDZ and ADA4898-2YRDZ-R7 are voltage feedback amplifiers with identical circuit count and package form factor. These devices feature higher gain bandwidth product (50 MHz versus 12 MHz), lower input offset voltage (20 µV versus 300 µV), and extended operating temperature range (-40°C to 105°C versus 0°C to 70°C). Supply voltage requirements are 9V to 33V, which overlaps the LT1355CS8#TR range.

Alternative Amplifier Topologies: AD746JRZ is a J-FET amplifier with two circuits in 8-SOIC package. This device exhibits significantly lower input bias current (110 pA versus 80 nA) but operates at higher supply current (7 mA versus 1 mA) and lower slew rate (75 V/µs versus 400 V/µs). Supply voltage range is 9V to 36V.

General Purpose and Audio Amplifiers: LM833D, LM833DR, MC33078D, MC33078DR, and MC33078DT are general-purpose or audio amplifiers with two circuits in 8-SOIC package. These devices operate within overlapping supply voltage ranges (5V to 36V) and share the same package footprint. However, they exhibit lower slew rates (7 V/µs), lower gain bandwidth products (15 to 16 MHz), and higher input bias currents (250 to 300 nA) compared to the LT1355CS8#TR.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Circuits	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (µV)	Supply Current (mA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package
LT1355CS8#TR	Analog Devices	Voltage Feedback	2	400	12	80	300	1	30	5	30	0 to 70	8-SOIC
LT1355CS8#TRPBF	Analog Devices	Voltage Feedback	2	400	12	80	300	1	30	5	30	0 to 70	8-SOIC
ADA4898-2YRDZ	Analog Devices	Voltage Feedback	2	55	50	100	20	7.9	40	9	33	-40 to 105	8-SOIC-EP
ADA4898-2YRDZ-R7	Analog Devices	Voltage Feedback	2	55	50	100	20	7.9	40	9	33	-40 to 105	8-SOIC-EP
AD746JRZ	Analog Devices	J-FET	2	75	13	0.11	300	7	25	9	36	0 to 70	8-SOIC
LM833D	onsemi	Audio	2	7	16	300	150	2.05	37	10	36	-40 to 85	8-SOIC
LM833DR	Texas Instruments	Audio	2	7	16	300	150	2.05	37	10	36	-40 to 85	8-SOIC
MC33078D	STMicroelectronics	General Purpose	2	7	15	250	150	4	37	5	30	-40 to 105	8-SOIC
MC33078DT	STMicroelectronics	General Purpose	2	7	15	250	150	4	37	5	30	-40 to 105	8-SOIC
MC33078DR	Texas Instruments	General Purpose	2	7	16	300	150	2.05	37	10	36	-40 to 85	8-SOIC

Engineering Selection Recommendations

Direct Replacement: LT1355CS8#TRPBF is the primary equivalent part, offering identical electrical specifications and performance characteristics. This part maintains full compatibility with designs specified for LT1355CS8#TR and differs only in packaging format (Cut Tape & Digi-Reel). Both parts are ROHS3 compliant, REACH unaffected, and carry MSL rating of 1 (Unlimited).

Enhanced Performance Alternative: ADA4898-2YRDZ and ADA4898-2YRDZ-R7 are suitable substitutes for applications requiring improved performance metrics. These devices provide higher gain bandwidth product (50 MHz), significantly lower input offset voltage (20 µV), and extended operating temperature range (-40°C to 105°C). Both variants are ROHS3 compliant and REACH unaffected. The trade-off is increased supply current (7.9 mA versus 1 mA) and reduced slew rate (55 V/µs versus 400 V/µs). Minimum supply voltage requirement increases to 9V. MSL rating is 3 (168 Hours).

Low Input Bias Current Alternative: AD746JRZ is appropriate for applications requiring extremely low input bias current (110 pA). This J-FET amplifier maintains the same package footprint and circuit count. However, it operates at higher supply current (7 mA), lower slew rate (75 V/µs), and requires minimum 9V supply voltage. Operating temperature range matches the LT1355CS8#TR (0°C to 70°C). ROHS3 compliant and REACH unaffected.

Cost-Optimized Alternatives: LM833D, LM833DR, MC33078D, MC33078DT, and MC33078DR are general-purpose and audio amplifiers suitable for applications where the LT1355CS8#TR's high slew rate is not critical. These devices operate within compatible supply voltage ranges and maintain the 8-SOIC package form factor. MC33078D and MC33078DT offer extended temperature range (-40°C to 105°C) and automotive qualification (AEC-Q100). All alternatives are ROHS3 compliant and REACH unaffected with MSL rating of 1 (Unlimited).

Frequently Asked Questions (FAQ)

Q: Can LT1355CS8#TRPBF be used as a direct replacement for LT1355CS8#TR?

A: Yes. LT1355CS8#TRPBF is electrically and functionally identical to LT1355CS8#TR. The difference is packaging format: LT1355CS8#TRPBF is supplied in Cut Tape & Digi-Reel format, while LT1355CS8#TR uses standard tape and reel. Both are surface mount 8-SOIC packages with identical pinout and performance specifications.

Q: What are the key differences between LT1355CS8#TR and ADA4898-2YRDZ?

A: Both are voltage feedback amplifiers with two circuits in 8-SOIC packages. ADA4898-2YRDZ offers superior performance with 50 MHz gain bandwidth product (versus 12 MHz), 20 µV input offset voltage (versus 300 µV), and extended operating temperature range (-40°C to 105°C versus 0°C to 70°C). However, ADA4898-2YRDZ requires higher supply current (7.9 mA versus 1 mA), has lower slew rate (55 V/µs versus 400 V/µs), and requires minimum 9V supply voltage. The package includes an exposed pad for thermal management.

Q: Is AD746JRZ compatible with LT1355CS8#TR applications?

A: AD746JRZ shares the same 8-SOIC package footprint and contains two circuits. However, it is a J-FET amplifier with fundamentally different input characteristics. Input bias current is significantly lower (110 pA versus 80 nA), but supply current is higher (7 mA versus 1 mA). Slew rate is lower (75 V/µs versus 400 V/µs). Compatibility depends on specific application requirements. Minimum supply voltage is 9V.

Q: Can general-purpose amplifiers like MC33078D replace LT1355CS8#TR?

A: MC33078D and similar general-purpose amplifiers share the 8-SOIC package and two-circuit configuration. They operate within compatible supply voltage ranges (5V to 30V for MC33078D). However, they have significantly lower slew rates (7 V/µs versus 400 V/µs) and lower gain bandwidth products (15 MHz versus 12 MHz). These devices are suitable only for applications where high slew rate is not required. MC33078D and MC33078DT offer extended temperature range and automotive qualification.

Q: What is the significance of the exposed pad in ADA4898-2YRDZ?

A: The exposed pad (EP) in the 8-SOIC-EP package provides direct thermal connection to the substrate, improving heat dissipation. This is beneficial in applications with high power dissipation or thermal constraints. The exposed pad must be properly connected to ground or thermal plane during PCB layout for optimal performance.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected. Moisture sensitivity levels vary: LT1355CS8#TR, LT1355CS8#TRPBF, and all general-purpose alternatives carry MSL 1 (Unlimited), while ADA4898-2YRDZ and ADA4898-2YRDZ-R7 carry MSL 3 (168 Hours).

Q: What is the difference between LM833DR and MC33078DR?

A: Both are two-circuit amplifiers in 8-SOIC packages. LM833DR is an audio amplifier with 16 MHz gain bandwidth product, while MC33078DR is a general-purpose amplifier with 16 MHz gain bandwidth product. LM833DR operates at 10V to 36V supply range and -40°C to 85°C temperature range. MC33078DR specifications vary by manufacturer source. Both are ROHS3 compliant with MSL 1 (Unlimited).

Q: Which substitute offers the lowest input offset voltage?

A: ADA4898-2YRDZ and ADA4898-2YRDZ-R7 offer the lowest input offset voltage at 20 µV, compared to 300 µV for LT1355CS8#TR. This makes them suitable for precision signal conditioning applications where offset voltage drift must be minimized.

Q: Can I use MC33078DT in automotive applications?

A: MC33078DT is manufactured by STMicroelectronics with automotive qualification (AEC-Q100) and extended operating temperature range (-40°C to 105°C). It is suitable for automotive applications requiring general-purpose amplification. However, verify that the lower slew rate (7 V/µs) and gain bandwidth product (15 MHz) meet specific application requirements.

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