LT1215CS8 Equivalent & Substitute Parts

Part Overview

The LT1215CS8 is a general purpose operational amplifier manufactured by Analog Devices Inc., configured as a dual-channel (2 circuit) device in an 8-SOIC surface mount package. This part is classified as Active product status and is RoHS3 compliant. The LT1215CS8 is designed for applications requiring moderate bandwidth and slew rate performance with low input bias current characteristics. Substitute parts are necessary when addressing supply chain constraints, packaging preferences, temperature range requirements, or performance specifications that differ from the original design intent.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Slew Rate	50	V/µs
Gain Bandwidth Product	23	MHz
Current - Input Bias	420	nA
Voltage - Input Offset	250	µV
Current - Supply (per Channel)	4.75	mA
Current - Output / Channel	50	mA
Voltage - Supply Span (Min)	2.5	V
Voltage - Supply Span (Max)	36	V
Operating Temperature Range	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 LT1215CS8 is determined by compatibility across the following critical parameters: amplifier type (general purpose), number of circuits (2), package form factor (8-SOIC surface mount), supply voltage range overlap, and operating temperature requirements. Substitute parts are grouped into two categories based on performance characteristics:

Category 1: Direct Packaging Variants — Parts that maintain identical electrical specifications but differ in packaging format (tube versus cut tape).

Category 2: Functional Equivalents — Parts that share the same amplifier type and circuit count but exhibit different electrical performance characteristics (slew rate, gain bandwidth product, input bias current, supply current, output current capability, and temperature range). These parts are suitable for substitution only when the application requirements permit operation within their specified electrical parameters and temperature ranges.

The key parameters determining substitution eligibility are:

Amplifier Type: General Purpose
Number of Circuits: 2
Package Type: 8-SOIC surface mount
Supply Voltage Range: Minimum 2.5 V to 3 V; Maximum 30 V to 36 V
Operating Temperature: 0°C to 70°C (or extended range)
Slew Rate: 0.3 V/µs to 50 V/µs
Gain Bandwidth Product: 700 kHz to 23 MHz

Parameter Comparison

Part Number	Manufacturer	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)	Product Status
LT1215CS8	Analog Devices Inc.	50	23	420	250	4.75	50	2.5	36	0 to 70	Active
LT1215CS8#PBF	Analog Devices Inc.	50	23	420	250	4.75	50	2.5	36	0 to 70	Active
LM258ADT	STMicroelectronics	0.6	1.1	20	1000	0.7	40	3	30	-40 to 105	Active
LM258DT	STMicroelectronics	0.6	1.1	20	5000	0.7	40	3	30	-40 to 105	Active
LM2904AYDT	STMicroelectronics	0.6	1.1	20	1000	0.7	40	3	30	-40 to 125	Active
LM2904DT	Rohm Semiconductor	0.3	0.7	20	1000	0.6	30	3	32	-40 to 125	Not For New Designs
LM2904YDT	STMicroelectronics	0.6	0.7	20	2000	0.7	30	3	30	-40 to 125	Active
LM358ADT	STMicroelectronics	0.6	1.1	20	1000	0.7	40	3	30	0 to 70	Active
LM358DT	Rohm Semiconductor	0.3	0.8	20	1000	0.6	30	3	32	-40 to 85	Obsolete
LM7372MR/NOPB	Texas Instruments	3000	120	2700	2000	13	260	9	36	-40 to 85	Active
LM7372MRX/NOPB	Texas Instruments	3000	120	2700	2000	13	260	9	36	-40 to 85	Active

Engineering Selection Recommendations

Direct Substitution (Identical Electrical Performance):

LT1215CS8#PBF is a direct substitute for LT1215CS8. Both parts are manufactured by Analog Devices Inc., share identical electrical specifications, and are Active product status. The difference is packaging format: LT1215CS8#PBF is supplied in tube packaging, while LT1215CS8 is supplied in standard packaging. Selection between these two variants depends on procurement and assembly requirements.

Functional Substitution (General Purpose Amplifiers with Reduced Performance):

LM258ADT, LM258DT, LM2904AYDT, and LM358ADT are suitable substitutes when application requirements permit operation with reduced slew rate (0.6 V/µs versus 50 V/µs) and lower gain bandwidth product (1.1 MHz versus 23 MHz). These parts are Active status and RoHS3 compliant. LM258ADT and LM2904AYDT are qualified to AEC-Q100 automotive standards. The LM258ADT and LM358ADT both support the original operating temperature range of 0°C to 70°C, while LM258DT and LM2904AYDT extend to -40°C to 125°C.

Functional Substitution (General Purpose Amplifiers with Significantly Reduced Performance):

LM2904YDT is an Active, AEC-Q100 qualified part with further reduced gain bandwidth product (700 kHz) and output current capability (30 mA versus 50 mA). Operating temperature range extends to -40°C to 125°C.

Not Recommended for New Designs:

LM2904DT (Rohm Semiconductor) carries "Not For New Designs" product status and should not be selected for new applications. LM358DT (Rohm Semiconductor) is Obsolete and unsuitable for any new design activity.

High-Performance Alternative (Voltage Feedback Amplifier):

LM7372MR/NOPB and LM7372MRX/NOPB are voltage feedback amplifiers with significantly higher performance (3000 V/µs slew rate, 120 MHz gain bandwidth product). These parts are not direct functional equivalents due to different amplifier topology and higher supply voltage requirement (minimum 9 V). Selection of these parts requires circuit redesign and is appropriate only for applications requiring substantially higher bandwidth and slew rate performance.

Frequently Asked Questions (FAQ)

Q: Can LM258ADT be used as a direct replacement for LT1215CS8?

A: LM258ADT shares the same package type (8-SOIC surface mount) and dual-channel general purpose amplifier configuration. However, it exhibits significantly different electrical performance: slew rate is reduced from 50 V/µs to 0.6 V/µs, and gain bandwidth product is reduced from 23 MHz to 1.1 MHz. Substitution is possible only if the application circuit design accommodates these reduced performance specifications. The minimum supply voltage is higher (3 V versus 2.5 V), which may affect low-voltage applications.

Q: What is the difference between LT1215CS8 and LT1215CS8#PBF?

A: Both parts are manufactured by Analog Devices Inc. and possess identical electrical specifications. The difference is packaging format: LT1215CS8#PBF is supplied in tube packaging, while LT1215CS8 is supplied in standard packaging. The "#PBF" designation indicates lead-free (Pb-free) plating. Selection depends on assembly line requirements and procurement preferences.

Q: Why is LM2904DT listed as "Not For New Designs"?

A: LM2904DT carries a "Not For New Designs" product status designation from the manufacturer. This indicates the part is in mature or declining production phase and is not recommended for incorporation into new product designs. Existing designs using this part may continue to source it, but new applications should select from Active status alternatives such as LM2904AYDT or LM2904YDT.

Q: Can LM7372MR/NOPB replace LT1215CS8?

A: LM7372MR/NOPB is a voltage feedback amplifier with substantially higher performance specifications (3000 V/µs slew rate, 120 MHz gain bandwidth product) compared to the LT1215CS8 (50 V/µs, 23 MHz). The minimum supply voltage requirement is higher (9 V versus 2.5 V). This part is not a direct functional equivalent and requires circuit redesign. Selection is appropriate only for applications requiring significantly higher bandwidth and slew rate performance.

Q: What is the operating temperature range difference between LM258ADT and LM2904AYDT?

A: LM258ADT operates from -40°C to 105°C, while LM2904AYDT operates from -40°C to 125°C. Both parts are AEC-Q100 qualified. Selection depends on the application's maximum operating temperature requirement. For applications limited to 0°C to 70°C (matching the original LT1215CS8 range), both parts are suitable.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference are RoHS3 compliant, matching the compliance status of the LT1215CS8. All parts also carry REACH Unaffected status and are classified under ECCN EAR99.

Q: What is the significance of AEC-Q100 qualification?

A: AEC-Q100 is an automotive industry qualification standard. Parts carrying this qualification (LM258ADT, LM2904AYDT, LM358ADT) have undergone additional reliability and performance testing suitable for automotive applications. Selection of AEC-Q100 qualified parts is necessary for automotive or mission-critical applications requiring enhanced reliability assurance.

Q: How does input bias current affect substitution?

A: The LT1215CS8 has an input bias current of 420 nA, while most substitute parts (LM258 and LM2904 series) have 20 nA. Lower input bias current reduces errors in high-impedance circuits. If the application circuit is designed around the 420 nA specification, substitution with 20 nA parts will improve performance. If the circuit compensates for 420 nA bias current, substitution with lower bias current parts may require circuit adjustment.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in Cut Tape (CT) & Digi-Reel® packaging (standard for high-volume production) or Tube packaging (standard for lower-volume or manual assembly). LT1215CS8#PBF is available in Tube packaging. Selection depends on assembly process requirements and procurement volume.

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