OPA4137UAE4 Equivalent & Substitute Parts

Part Overview

The OPA4137UAE4 is a J-FET input operational amplifier manufactured by Texas Instruments, configured as a 4-circuit device in 14-SOIC surface mount packaging. This component is classified as a Linear Amplifier within the MicroAmplifier™ series and is designed for applications requiring low input bias current and high input impedance characteristics typical of J-FET amplifier architectures.

The OPA4137UAE4 has been discontinued at DiGi Electronics. Equivalent and substitute parts are available from multiple manufacturers, offering comparable or enhanced electrical performance while maintaining compatibility with the original design specifications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	4	—
Slew Rate	3.5	V/µs
Gain Bandwidth Product	1	MHz
Current - Input Bias	5	pA
Voltage - Input Offset	1.5	mV
Current - Supply	220	µA
Current - Output / Channel	60	mA
Voltage - Supply Span (Min)	4.5	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	-40 to 85	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the OPA4137UAE4 is determined by the following critical parameters:

Primary Substitution Criteria:

Number of Circuits: 4 (all substitutes must provide 4 independent amplifier circuits)
Package / Case: 14-SOIC surface mount configuration with 0.154" (3.90mm) width
Mounting Type: Surface Mount
Supply Voltage Range: Minimum 4.5 V to Maximum 36 V (or compatible subset)
Operating Temperature Range: Must support -40°C to 85°C minimum

Secondary Compatibility Parameters:

Slew Rate: 3.5 V/µs (OPA4137UAE4 baseline)
Gain Bandwidth Product: 1 MHz (OPA4137UAE4 baseline)
Input Bias Current: 5 pA (J-FET characteristic)
Output Current per Channel: 60 mA minimum

Substitute parts are grouped into two categories:

Category 1 - Direct J-FET Equivalents: Parts maintaining J-FET amplifier architecture with identical or superior electrical performance.

Category 2 - General Purpose Alternatives: Parts with General Purpose amplifier architecture, offering different electrical characteristics but compatible pinout and package configuration for applications where J-FET input characteristics are not mandatory.

Parameter Comparison

Parameter	OPA4137UAE4	OPA4137UA	BA14741F-E2	LM124DT	LM224ADT	LM224DT	LM248DT	LM2902AWYDT	LM2902DT	LM2902YDT	LM324ADR2G
Amplifier Type	J-FET	J-FET	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
Slew Rate (V/µs)	3.5	3.5	1	0.4	0.4	0.4	0.5	0.4	0.3	0.4	—
Gain Bandwidth Product (MHz)	1	1	2	1.3	1.3	1.3	1.3	1.3	0.8	1.3	1
Current - Input Bias (pA/nA)	5 pA	5 pA	60 nA	20 nA	20 nA	20 nA	30 nA	20 nA	20 nA	20 nA	40 nA
Voltage - Input Offset (mV)	1.5	1.5	1	2	2	2	1	2	1	2	2
Current - Supply (µA/mA)	220 µA	220 µA	3 mA	1.5 mA	1.5 mA	1.5 mA	2.1 mA	1.5 mA	1 mA	1.5 mA	1.5 mA
Current - Output / Channel (mA)	60	60	20	40	40	40	25	40	30	60	40
Voltage - Supply Span Min (V)	4.5	4.5	4	3	3	3	44	3	3	3	3
Voltage - Supply Span Max (V)	36	36	36	30	30	30	44	30	32	30	32
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 85	-55 to 125	-40 to 105	-40 to 105	-40 to 105	-40 to 125	-40 to 125	-40 to 125	0 to 70
Package / Case	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.173", 4.40mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued	Active	Active	Active	Active	Active	Active	Active	Not For New Designs	Active	Active

Engineering Selection Recommendations

Direct Equivalent - Recommended First Choice:

The OPA4137UA (Burr Brown / Texas Instruments) is the primary equivalent substitute for the OPA4137UAE4. This part maintains identical J-FET amplifier architecture, electrical specifications, and 14-SOIC packaging. The OPA4137UA is in Active product status with 1880 units in stock inventory. This part is suitable for direct replacement in all applications where the OPA4137UAE4 was originally specified.

Secondary Equivalent - J-FET Architecture:

No additional J-FET 4-circuit alternatives are available in the provided substitute list. The OPA4137UA remains the sole J-FET equivalent option.

General Purpose Alternatives - Conditional Substitution:

General Purpose amplifier substitutes are applicable only in applications where J-FET input characteristics (ultra-low input bias current of 5 pA) are not mandatory. These alternatives offer different electrical performance profiles:

LM2902YDT (STMicroelectronics): Active status, AEC-Q100 automotive qualification, 60 mA output current per channel (matches OPA4137UAE4), extended temperature range to -40°C to 125°C. Suitable for automotive and industrial applications.
LM224ADT and LM224DT (STMicroelectronics): Active status, high inventory availability (34,870 and 35,200 units respectively), extended temperature range to -40°C to 105°C. Suitable for general industrial applications.
LM2902AWYDT (STMicroelectronics): Active status, AEC-Q100 automotive qualification, extended temperature range to -40°C to 125°C. Suitable for automotive applications.
BA14741F-E2 (Rohm Semiconductor): Active status, highest inventory availability (50,300 units), extended temperature range to -40°C to 85°C. Suitable for high-volume applications.

Parts Not Recommended for New Designs:

LM2902DT (Rohm Semiconductor): Product status is "Not For New Designs." This part should not be selected for new circuit designs, though it may be used for legacy system maintenance.
LM124DT (STMicroelectronics): Operating temperature range limited to -55°C to 125°C with maximum supply voltage of 30 V, which does not fully support the OPA4137UAE4 supply range of 36 V maximum.
LM248DT (STMicroelectronics): Supply voltage specification of 44 V (fixed) does not provide the flexible supply range of the OPA4137UAE4.
LM324ADR2G (onsemi): Operating temperature range limited to 0°C to 70°C, which does not support the full -40°C to 85°C range of the OPA4137UAE4.

Compliance and Certification:

All recommended substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the OPA4137UAE4. Automotive-grade alternatives (LM2902AWYDT, LM2902YDT) carry AEC-Q100 qualification for applications requiring automotive reliability standards.

Frequently Asked Questions (FAQ)

Q1: Can the OPA4137UA be used as a direct replacement for the OPA4137UAE4?

A: Yes. The OPA4137UA is a direct equivalent. Both parts are J-FET input operational amplifiers with 4 circuits in 14-SOIC packaging, identical electrical specifications (3.5 V/µs slew rate, 1 MHz gain bandwidth product, 5 pA input bias current), and compatible supply voltage ranges (4.5 V to 36 V). The OPA4137UA is in Active product status and is the recommended substitute.

Q2: What is the difference between J-FET and General Purpose amplifier types?

A: J-FET amplifiers feature ultra-low input bias current (5 pA for OPA4137UAE4) and high input impedance, making them suitable for high-impedance signal sources and precision measurement applications. General Purpose amplifiers have higher input bias current (20-60 nA) but offer different performance trade-offs such as lower supply current or extended temperature ranges. Selection depends on application requirements for input impedance and bias current characteristics.

Q3: Can I substitute a General Purpose amplifier for the OPA4137UAE4 in my design?

A: General Purpose substitutes are applicable only if your circuit design does not depend on the J-FET input characteristics (ultra-low input bias current and high input impedance). If your application requires these specific J-FET properties, only the OPA4137UA is suitable. If your application can tolerate higher input bias current (20-60 nA instead of 5 pA), General Purpose alternatives such as LM224DT, LM2902YDT, or LM2902AWYDT may be used.

Q4: What is the significance of the 14-SOIC package width specification (0.154" vs 0.173")?

A: The 14-SOIC package width affects PCB layout and component spacing. The OPA4137UAE4 uses 14-SOIC with 0.154" (3.90mm) width. Most substitute parts maintain this same width for direct PCB compatibility. The BA14741F-E2 uses 14-SOIC with 0.173" (4.40mm) width, which may require PCB layout verification before substitution. Confirm PCB footprint compatibility before selecting this part.

Q5: Which substitute parts support the full -40°C to 85°C operating temperature range of the OPA4137UAE4?

A: The OPA4137UA and BA14741F-E2 support the full -40°C to 85°C range. Additional parts support extended temperature ranges: LM124DT (-55°C to 125°C), LM224ADT (-40°C to 105°C), LM224DT (-40°C to 105°C), LM248DT (-40°C to 105°C), LM2902AWYDT (-40°C to 125°C), LM2902DT (-40°C to 125°C), and LM2902YDT (-40°C to 125°C). The LM324ADR2G has a limited range (0°C to 70°C) and is not suitable for the full OPA4137UAE4 temperature specification.

Q6: Are there automotive-qualified alternatives available?

A: Yes. The LM2902AWYDT and LM2902YDT both carry AEC-Q100 automotive qualification and are suitable for automotive applications requiring General Purpose amplifier characteristics. Both parts support -40°C to 125°C operating temperature range and are in Active product status.

Q7: What is the inventory status of substitute parts?

A: The OPA4137UA has 1,880 units in stock. General Purpose alternatives have higher availability: BA14741F-E2 (50,300 units), LM224ADT (34,870 units), LM224DT (35,200 units), LM2902DT (105,100 units), LM2902YDT (8,264 units), LM124DT (10,200 units), LM248DT (1,479 units), LM2902AWYDT (3,106 units), and LM324ADR2G (10,300 units). High inventory availability supports rapid procurement for production applications.

Q8: Why is the LM2902DT marked "Not For New Designs"?

A: Parts marked "Not For New Designs" are in mature or declining product lifecycle status. While functional and available in inventory (105,100 units), manufacturers recommend using active alternatives for new circuit designs to ensure long-term supply continuity and access to design support. The LM2902DT may be used for legacy system maintenance or repair.

Q9: What supply voltage range considerations apply to substitute selection?

A: The OPA4137UAE4 supports 4.5 V to 36 V supply range. Most General Purpose substitutes support 3 V to 30 V or 3 V to 32 V ranges, which are compatible subsets. The LM248DT specifies 44 V (fixed), which does not provide the flexible range. The LM124DT maximum of 30 V does not support the full 36 V specification. Verify supply voltage requirements in your application before selecting substitutes with reduced maximum voltage ratings.

Q10: How do output current specifications affect substitution?

A: The OPA4137UAE4 provides 60 mA output current per channel. The LM2902YDT also provides 60 mA per channel, making it suitable for applications requiring high output current. Other General Purpose alternatives provide 20-40 mA per channel. If your circuit requires 60 mA output current, select either the OPA4137UA (J-FET equivalent) or LM2902YDT (General Purpose alternative). Lower output current alternatives may require circuit redesign or external buffering.

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