LT1815CS5#TR Equivalent & Substitute Parts

Part Overview

The LT1815CS5#TR is an active voltage feedback operational amplifier manufactured by Analog Devices Inc., designed for general-purpose signal conditioning and amplification applications. This single-circuit operational amplifier is housed in a TSOT-23-5 surface mount package and operates across a 2.5 V to 11 V supply voltage range. The device is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, enhanced performance specifications, or extended operating temperature ranges while maintaining functional compatibility within the voltage feedback amplifier category.

Key Parameters

Parameter	LT1815CS5#TR
Manufacturer	Analog Devices Inc.
Category	Linear, Amplifiers
Amplifier Type	Voltage Feedback
Number of Circuits	1
Package / Case	SOT-23-5 Thin, TSOT-23-5
Mounting Type	Surface Mount
Slew Rate	1500 V/µs
Gain Bandwidth Product	220 MHz
-3dB Bandwidth	350 MHz
Current - Input Bias	2 µA
Voltage - Input Offset	200 µV
Current - Supply	6.5 mA
Current - Output / Channel	80 mA
Voltage - Supply Span (Min)	2.5 V
Voltage - Supply Span (Max)	11 V
Operating Temperature	0°C ~ 70°C
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LT1815CS5#TR is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Amplifier Type: Voltage Feedback (single circuit configuration)
Package Compatibility: SOT-23-5 surface mount package
Supply Voltage Range: Minimum 2.5 V to maximum 11 V overlap required
Mounting Type: Surface Mount

Secondary Compatibility Parameters:

Slew Rate: Minimum 1500 V/µs for direct substitution
Gain Bandwidth Product: Minimum 220 MHz for direct substitution
Current - Output / Channel: Minimum 80 mA for direct substitution
Input Bias Current: Maximum 2 µA for direct substitution
Input Offset Voltage: Maximum 200 µV for direct substitution

The substitute parts identified (LM7121IM5/NOPB and LMH6624MF/NOPB) share the same functional category, package type, and surface mount configuration. However, each substitute exhibits different performance trade-offs in bandwidth, slew rate, and supply voltage specifications that must be evaluated against specific application requirements.

Parameter Comparison

Parameter	LT1815CS5#TR	LM7121IM5/NOPB	LMH6624MF/NOPB
Manufacturer	Analog Devices Inc.	Texas Instruments	Texas Instruments
Amplifier Type	Voltage Feedback	Voltage Feedback	Voltage Feedback
Number of Circuits	1	1	1
Package / Case	SOT-23-5 Thin, TSOT-23-5	SC-74A, SOT-753	SC-74A, SOT-753
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Slew Rate	1500 V/µs	520 V/µs	400 V/µs
Gain Bandwidth Product	220 MHz	105 MHz	1.5 GHz
-3dB Bandwidth	350 MHz	160 MHz	95 MHz
Current - Input Bias	2 µA	5.5 µA	13 µA
Voltage - Input Offset	200 µV	1.6 mV	100 µV
Current - Supply	6.5 mA	5.1 mA	12 mA
Current - Output / Channel	80 mA	Not specified	100 mA
Voltage - Supply Span (Min)	2.5 V	4.5 V	5 V
Voltage - Supply Span (Max)	11 V	11 V	12 V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 125°C
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

LM7121IM5/NOPB (Texas Instruments)

The LM7121IM5/NOPB is a voltage feedback amplifier suitable for applications where lower bandwidth and slew rate requirements are acceptable. This substitute operates within the overlapping supply voltage range (4.5 V to 11 V) and maintains the same SOT-23-5 package configuration. The device exhibits lower power consumption (5.1 mA) compared to the LT1815CS5#TR. However, the LM7121IM5/NOPB demonstrates reduced slew rate (520 V/µs) and gain bandwidth product (105 MHz), making it unsuitable for high-speed signal conditioning applications. The extended operating temperature range (-40°C to 85°C) provides enhanced thermal performance. All regulatory compliance certifications (RoHS3, REACH Unaffected, EAR99) are maintained.

LMH6624MF/NOPB (Texas Instruments)

The LMH6624MF/NOPB is a high-performance voltage feedback amplifier featuring significantly elevated gain bandwidth product (1.5 GHz) and extended operating temperature range (-40°C to 125°C). This substitute maintains SOT-23-5 package compatibility and surface mount configuration. The device operates within the overlapping supply voltage range (5 V to 12 V) and provides higher output current capability (100 mA). The LMH6624MF/NOPB exhibits lower input offset voltage (100 µV) compared to the LT1815CS5#TR. However, this substitute demonstrates reduced slew rate (400 V/µs) and -3dB bandwidth (95 MHz), along with elevated supply current (12 mA) and input bias current (13 µA). All regulatory compliance certifications (RoHS3, REACH Unaffected, EAR99) are maintained.

Frequently Asked Questions (FAQ)

Q: Can the LM7121IM5/NOPB directly replace the LT1815CS5#TR in all applications?

A: The LM7121IM5/NOPB shares the same voltage feedback amplifier topology and SOT-23-5 package configuration. However, the reduced slew rate (520 V/µs versus 1500 V/µs) and lower gain bandwidth product (105 MHz versus 220 MHz) restrict its use to applications with lower bandwidth requirements. The minimum supply voltage requirement (4.5 V) is higher than the LT1815CS5#TR (2.5 V), limiting compatibility in low-voltage designs.

Q: What are the key differences between the LMH6624MF/NOPB and the LT1815CS5#TR?

A: The LMH6624MF/NOPB provides significantly higher gain bandwidth product (1.5 GHz) and extended operating temperature range (-40°C to 125°C). The LMH6624MF/NOPB requires higher minimum supply voltage (5 V versus 2.5 V) and exhibits lower slew rate (400 V/µs versus 1500 V/µs). The LMH6624MF/NOPB consumes higher supply current (12 mA versus 6.5 mA) and exhibits higher input bias current (13 µA versus 2 µA).

Q: Are all substitute parts available in the same package configuration?

A: All substitute parts utilize the SOT-23-5 surface mount package, maintaining mechanical and thermal compatibility. The package designations differ slightly (SC-74A, SOT-753 for substitutes versus TSOT-23-5 for the main part), but these represent equivalent package standards suitable for identical PCB footprints.

Q: What supply voltage range is compatible with all three devices?

A: The overlapping supply voltage range across all three devices is 5 V to 11 V. The LT1815CS5#TR operates at lower minimum voltage (2.5 V), while the LMH6624MF/NOPB extends to higher maximum voltage (12 V). Applications requiring operation below 4.5 V must use the LT1815CS5#TR exclusively.

Q: Do all substitute parts maintain the same regulatory compliance status?

A: All devices (LT1815CS5#TR, LM7121IM5/NOPB, and LMH6624MF/NOPB) are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99. All devices carry MSL 1 (Unlimited) moisture sensitivity rating, ensuring equivalent handling and storage requirements.

Q: Which substitute part offers the best high-frequency performance?

A: The LMH6624MF/NOPB provides the highest gain bandwidth product (1.5 GHz) and is suitable for high-frequency applications. However, this device exhibits lower slew rate (400 V/µs) and -3dB bandwidth (95 MHz) compared to the LT1815CS5#TR, indicating trade-offs in transient response characteristics.

Q: Can the LT1815CS5#TR be used in applications requiring extended temperature operation?

A: The LT1815CS5#TR operates within 0°C to 70°C temperature range. Applications requiring extended temperature operation (-40°C to 85°C or -40°C to 125°C) must use LM7121IM5/NOPB or LMH6624MF/NOPB respectively.

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