OPA373AIDBVRG4 Equivalent & Substitute Parts

Part Overview

The OPA373AIDBVRG4 is a general-purpose operational amplifier manufactured by Texas Instruments, packaged in SOT-23-6 surface mount configuration. This device features rail-to-rail output capability and is designed for low-power analog signal processing applications across industrial, consumer, and instrumentation markets.

The OPA373AIDBVRG4 is currently discontinued at DiGi Electronics. Equivalent and substitute parts are available to maintain design continuity and ensure supply chain reliability for existing applications and new designs requiring comparable performance characteristics.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	5	V/µs
Gain Bandwidth Product	6.5	MHz
Current - Input Bias	0.5	pA
Voltage - Input Offset	1	mV
Current - Supply	585	µA
Voltage - Supply Span (Min)	2.3	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 125	°C
Package / Case	SOT-23-6	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	2 (1 Year)	—

Substitute Part Grouping Explanation

Substitution of the OPA373AIDBVRG4 is determined by the following critical parameters:

Primary Compatibility Criteria:

Package type: SOT-23-6 or TSOT-23-6 (physically compatible)
Output configuration: Rail-to-rail output
Number of circuits: Single amplifier per package
Supply voltage range: Minimum 2.3 V to maximum 5.5 V overlap required
Operating temperature range: Must support -40°C to 125°C or equivalent industrial range
Surface mount configuration: Mandatory for PCB assembly compatibility

Substitution Logic:

The OPA373AIDBVRG4 can be directly replaced by the OPA373AIDBVR (same base product, active status, identical electrical specifications). This represents the primary equivalent for continued supply.

The LTC6252 series (LTC6252CS6#TRMPBF, LTC6252CS6#TRPBF, LTC6252HS6#TRMPBF, LTC6252IS6#TRMPBF, LTC6252IS6#TRPBF) from Analog Devices Inc. provides functional substitution with enhanced performance characteristics. These devices maintain SOT-23-6 package compatibility and rail-to-rail output configuration. However, they operate at higher slew rates (280 V/µs vs. 5 V/µs) and significantly higher gain bandwidth product (720 MHz vs. 6.5 MHz), making them suitable for applications requiring superior frequency response.

The LTC6268 series (LTC6268HS6-10#TRMPBF, LTC6268IS6-10#TRMPBF, LTC6268IS6-10#TRPBF) represents an alternative for applications demanding ultra-low input bias current (0.003 pA) and extremely high slew rate (1500 V/µs). These J-FET input amplifiers are pin-compatible in SOT-23-6 packaging but consume higher supply current (16.5 mA vs. 585 µA).

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (mV)	Supply Current (µA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	Status
OPA373AIDBVRG4	Texas Instruments	General Purpose	5	6.5	0.5	1	585	2.3	5.5	-40 to 125	SOT-23-6	Discontinued
OPA373AIDBVR	Texas Instruments	General Purpose	5	6.5	0.5	1	585	2.3	5.5	-40 to 125	SOT-23-6	Active
LTC6252CS6#TRMPBF	Analog Devices Inc.	General Purpose	280	720	1400	0.1	4250	2.5	5.25	0 to 70	TSOT-23-6	Last Time Buy
LTC6252CS6#TRPBF	Analog Devices Inc.	General Purpose	280	720	1400	0.1	4250	2.5	5.25	0 to 70	TSOT-23-6	Last Time Buy
LTC6252HS6#TRMPBF	Analog Devices Inc.	General Purpose	280	720	1400	0.1	4250	2.5	5.25	-40 to 125	TSOT-23-6	Last Time Buy
LTC6252IS6#TRMPBF	Analog Devices Inc.	General Purpose	280	720	1400	0.1	4250	2.5	5.25	-40 to 85	TSOT-23-6	Last Time Buy
LTC6252IS6#TRPBF	Analog Devices Inc.	General Purpose	280	720	1400	0.1	4250	2.5	5.25	-40 to 85	TSOT-23-6	Last Time Buy
LTC6268HS6-10#TRMPBF	Analog Devices Inc.	J-FET	1500	4000	0.003	0.2	16500	3.1	5.25	-40 to 125	TSOT-23-6	Active
LTC6268IS6-10#TRMPBF	Analog Devices Inc.	J-FET	1500	4000	0.003	0.2	16500	3.1	5.25	-40 to 85	TSOT-23-6	Active
LTC6268IS6-10#TRPBF	Analog Devices Inc.	J-FET	1500	4000	0.003	0.2	16500	3.1	5.25	-40 to 85	TSOT-23-6	Active

Engineering Selection Recommendations

Primary Recommendation: OPA373AIDBVR

The OPA373AIDBVR is the direct equivalent to the discontinued OPA373AIDBVRG4. This part maintains identical electrical specifications, package configuration, and operating characteristics. The OPA373AIDBVR is currently in active production status with 22,066 pieces in stock, ensuring reliable supply for immediate and future requirements. Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Secondary Recommendation: LTC6252HS6#TRMPBF

For applications where the OPA373AIDBVR supply becomes constrained, the LTC6252HS6#TRMPBF provides functional substitution with enhanced performance. This device maintains the full industrial temperature range (-40°C to 125°C) required for the original specification. The LTC6252HS6#TRMPBF operates at higher slew rate and gain bandwidth product, making it suitable for applications tolerant of improved frequency response. Supply voltage range (2.5 V to 5.25 V) overlaps with the original specification. This part is ROHS3 compliant with MSL 1 rating (unlimited shelf life).

Alternative for High-Performance Applications: LTC6268IS6-10#TRMPBF

The LTC6268IS6-10#TRMPBF is recommended only for applications requiring ultra-low input bias current and extremely high slew rate performance. This J-FET input amplifier is pin-compatible in SOT-23-6 packaging but operates at significantly higher supply current (16.5 mA vs. 585 µA). The minimum supply voltage requirement (3.1 V) is higher than the original specification (2.3 V). This part is suitable for precision instrumentation and high-speed signal conditioning where power consumption is not a primary constraint. The LTC6268IS6-10#TRMPBF is currently in active production with 100,400 pieces available.

Compliance Considerations:

All recommended substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring compatibility with current environmental regulations. Moisture sensitivity levels range from MSL 1 (unlimited shelf life) for Analog Devices parts to MSL 2 (1 year) for the original OPA373 series.

Frequently Asked Questions (FAQ)

Q: Can the OPA373AIDBVRG4 be directly replaced with the OPA373AIDBVR?

A: Yes. The OPA373AIDBVR is the active production equivalent of the discontinued OPA373AIDBVRG4. Both parts share identical electrical specifications, package configuration (SOT-23-6), and operating temperature range (-40°C to 125°C). The only difference is product status: OPA373AIDBVR is active, while OPA373AIDBVRG4 is discontinued. No circuit modifications are required.

Q: What are the key differences between the OPA373AIDBVR and LTC6252 series?

A: The primary differences are slew rate and gain bandwidth product. The OPA373AIDBVR operates at 5 V/µs slew rate and 6.5 MHz gain bandwidth product, while the LTC6252 series operates at 280 V/µs and 720 MHz respectively. The LTC6252 series also exhibits higher supply current (4.25 mA vs. 585 µA) and lower input offset voltage (100 µV vs. 1 mV). These differences make the LTC6252 suitable for higher-frequency applications but less suitable for ultra-low-power designs.

Q: Is the LTC6252HS6#TRMPBF compatible with the full industrial temperature range?

A: Yes. The LTC6252HS6#TRMPBF operates across -40°C to 125°C, matching the original OPA373AIDBVRG4 temperature specification. Other LTC6252 variants (CS6 and IS6) have more limited temperature ranges (0°C to 70°C and -40°C to 85°C respectively) and should be selected only if the application does not require the full industrial range.

Q: Can the LTC6268 series be used as a direct replacement?

A: The LTC6268 series is pin-compatible in SOT-23-6 packaging but is not a direct replacement. The LTC6268 is a J-FET input amplifier with significantly different electrical characteristics: 1500 V/µs slew rate, 4 GHz gain bandwidth product, and 16.5 mA supply current. The minimum supply voltage is 3.1 V, which exceeds the original 2.3 V minimum. Use the LTC6268 only when ultra-low input bias current (0.003 pA) and extremely high slew rate are required by the application.

Q: What is the supply voltage compatibility between these parts?

A: The OPA373AIDBVR operates from 2.3 V to 5.5 V. The LTC6252 series operates from 2.5 V to 5.25 V, creating a compatible overlap from 2.5 V to 5.25 V. The LTC6268 series requires 3.1 V minimum, further restricting the compatible range to 3.1 V to 5.25 V. Applications operating below 2.5 V must use the OPA373AIDBVR or OPA373AIDBVRG4.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The OPA373AIDBVR, all LTC6252 variants, and all LTC6268 variants are ROHS3 compliant and REACH unaffected. All parts meet current environmental and regulatory requirements for commercial and industrial applications.

Q: What is the difference between packaging designations (CT, TR, Digi-Reel)?

A: Cut Tape (CT) and Digi-Reel® packaging are suitable for automated pick-and-place assembly. Tape & Reel (TR) packaging is standard for high-volume production. All three packaging formats contain electrically identical parts; the difference is in delivery and handling format. Select based on assembly equipment compatibility and order quantity requirements.

Q: Which substitute part has the lowest power consumption?

A: The OPA373AIDBVR maintains the lowest supply current at 585 µA. The LTC6252 series consumes approximately 7.3 times more current (4.25 mA), while the LTC6268 series consumes approximately 28 times more current (16.5 mA). For battery-powered or ultra-low-power applications, the OPA373AIDBVR is the only suitable choice.

Q: Can these parts be used interchangeably in existing PCB designs?

A: The OPA373AIDBVR can be used interchangeably with the OPA373AIDBVRG4 without any PCB modifications. The LTC6252 and LTC6268 series are pin-compatible in SOT-23-6 packaging but may require circuit design modifications due to different electrical characteristics (slew rate, bandwidth, supply current). Verify application requirements before substituting with higher-performance alternatives.

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