LM837M/NOPB Equivalent & Substitute Parts

Part Overview

The LM837M/NOPB is a general-purpose operational amplifier manufactured by Texas Instruments, configured as a quad (4-circuit) device in a 14-SOIC surface-mount package. This part is classified as obsolete, which necessitates identification of active substitute components for new designs and ongoing production requirements. The LM837M/NOPB operates across a -40°C to 85°C temperature range with a 36 V supply span and delivers 40 mA output per channel, making it suitable for general signal conditioning and amplification applications.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	LM837M/NOPB	—
Manufacturer	Texas Instruments	—
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Slew Rate	10	V/µs
Gain Bandwidth Product	25	MHz
Current - Input Bias	500	nA
Voltage - Input Offset	300	µV
Current - Supply (x4 Channels)	10	mA
Current - Output / Channel	40	mA
Voltage - Supply Span	36	V
Operating Temperature Range	-40 to 85	°C
Mounting Type	Surface Mount	—
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LM837M/NOPB is determined by the following critical parameters:

Primary Compatibility Criteria:

Number of circuits: 4 (quad configuration)
Package type: 14-SOIC surface mount
Output current per channel: 40 mA minimum
Supply voltage span: minimum 36 V or greater
Operating temperature range: must encompass -40°C to 85°C or broader
Amplifier type: General Purpose or J-FET (both acceptable for signal conditioning)

Secondary Compatibility Criteria:

Slew rate: 10 V/µs or greater preferred for signal fidelity
Gain bandwidth product: 25 MHz or greater preferred for frequency response
Input bias current: lower values reduce offset errors
Input offset voltage: lower values improve DC accuracy
Supply current: lower values reduce power dissipation

Substitute parts are grouped into two categories: General Purpose Amplifiers (direct functional equivalents) and J-FET Amplifiers (alternative topology with superior input characteristics). All substitute parts maintain the 14-SOIC package footprint and support the required supply voltage and temperature ranges.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA/pA)	Input Offset (µV/mV)	Supply Current (mA/µA)	Output Current (mA)	Supply Span (V)	Temp Range (°C)	Product Status
LM837M/NOPB	Texas Instruments	General Purpose	10	25	500 nA	300 µV	10 mA	40	36	-40 to 85	Obsolete
OPA4228UA	Burr Brown	General Purpose	11	33	2.5 nA	10 µV	3.7 mA	45	5–36	-55 to 85	Active
AS324AMTR-E1	Diodes Incorporated	General Purpose	—	—	20 nA	2 mV	1 mA	40	3–36	-40 to 85	Active
AS324AMTR-G1	Diodes Incorporated	General Purpose	—	—	20 nA	2 mV	1 mA	40	3–36	-40 to 85	Active
LF247DT	STMicroelectronics	J-FET	16	4	20 pA	3 mV	1.4 mA	40	44	-40 to 105	Active
LF347D	STMicroelectronics	J-FET	16	3	20 pA	3 mV	1.4 mA	40	44	0 to 70	Active
LF347DT	STMicroelectronics	J-FET	16	4	20 pA	3 mV	1.4 mA	40	44	0 to 70	Active
LM2902EDR2G	onsemi	General Purpose	—	—	90 nA	2 mV	—	40	3–32	-40 to 105	Active
LT1463CS#PBF	Analog Devices Inc.	J-FET	0.13	0.175	1 pA	600 µV	28 µA	17	10–30	0 to 70	Last Time Buy
LT1465CS#PBF	Analog Devices Inc.	J-FET	0.9	1	0.5 pA	600 µV	145 µA	—	10–30	-40 to 85	Active
LT1465CS#TRPBF	Analog Devices Inc.	J-FET	0.9	1	0.5 pA	600 µV	145 µA	—	10–30	-40 to 85	Active

Engineering Selection Recommendations

General Purpose Amplifier Substitutes (Recommended for Direct Replacement):

The OPA4228UA, AS324AMTR-E1, AS324AMTR-G1, and LM2902EDR2G are active general-purpose quad operational amplifiers that maintain functional compatibility with the LM837M/NOPB. All four parts are ROHS3 compliant and support the required 14-SOIC package footprint.

OPA4228UA (Burr Brown, Active): Exceeds the LM837M/NOPB in slew rate (11 V/µs vs. 10 V/µs) and gain bandwidth product (33 MHz vs. 25 MHz). Input bias current is significantly lower (2.5 nA vs. 500 nA), reducing offset errors. Supply current is reduced to 3.7 mA, improving power efficiency. Output current is increased to 45 mA. Supply span extends to 5–36 V, providing greater flexibility. Operating temperature range extends to -55°C to 85°C. This part is the highest-performance general-purpose substitute.
AS324AMTR-E1 and AS324AMTR-G1 (Diodes Incorporated, Active): Both parts provide equivalent output current (40 mA) and operating temperature range (-40°C to 85°C). Supply span is extended to 3–36 V. Supply current is reduced to 1 mA, significantly improving power efficiency. Input bias current is 20 nA. These parts are suitable for cost-optimized designs with reduced power requirements. AS324AMTR-E1 is packaged in Tape & Reel; AS324AMTR-G1 is also Tape & Reel with MSL-3 moisture sensitivity.
LM2902EDR2G (onsemi, Active): Maintains 40 mA output current and -40°C to 105°C operating range, extending the upper temperature limit. Supply span is 3–32 V. Input bias current is 90 nA. This part is suitable for extended-temperature applications.

J-FET Amplifier Substitutes (Alternative Topology):

J-FET amplifiers offer superior input characteristics (picoampere-level input bias current) at the cost of reduced bandwidth and slew rate. These parts are suitable for high-impedance signal sources and precision DC applications.

LF247DT and LF347DT (STMicroelectronics, Active): Both provide 40 mA output current and J-FET input stage with 20 pA input bias current. LF247DT supports -40°C to 105°C and 44 V supply span. LF347DT and LF347D support 0°C to 70°C. Slew rate is 16 V/µs, exceeding the LM837M/NOPB. Gain bandwidth product is lower (3–4 MHz), suitable for lower-frequency applications. Supply current is 1.4 mA.
LT1463CS#PBF (Analog Devices Inc., Last Time Buy): Ultra-low input bias current (1 pA) and extremely low supply current (28 µA). Output current is reduced to 17 mA. Supply span is 10–30 V, narrower than the LM837M/NOPB. Slew rate is 0.13 V/µs and gain bandwidth product is 175 kHz, suitable only for very low-frequency precision applications. Product status is Last Time Buy; use only if existing inventory is available.
LT1465CS#PBF and LT1465CS#TRPBF (Analog Devices Inc., Active): Improved performance over LT1463CS with 0.5 pA input bias current and 0.9 V/µs slew rate. Gain bandwidth product is 1 MHz. Supply current is 145 µA. Supply span is 10–30 V. Operating temperature range is -40°C to 85°C. Output current specification is not provided. These parts are suitable for precision low-frequency applications with extended temperature range.

Compliance and Certification:

All recommended substitute parts are ROHS3 compliant and REACH unaffected. Moisture sensitivity levels range from MSL-1 (unlimited) to MSL-3 (168 hours). Select parts based on manufacturing and storage environment requirements.

Frequently Asked Questions (FAQ)

Q1: Can I directly replace the LM837M/NOPB with any of these substitute parts?

A: Direct replacement depends on application requirements. The OPA4228UA, AS324AMTR-E1, AS324AMTR-G1, and LM2902EDR2G are general-purpose amplifiers with compatible pinouts and 14-SOIC packages. Verify that your circuit design does not depend on the specific slew rate, gain bandwidth product, or input bias current of the original part. J-FET substitutes (LF247DT, LF347DT, LT1463CS, LT1465CS) have different electrical characteristics and may require circuit redesign.

Q2: What is the key difference between general-purpose and J-FET amplifiers?

A: General-purpose amplifiers use bipolar input stages with input bias currents in the nanoampere range (typically 20–500 nA). J-FET amplifiers use field-effect transistor input stages with input bias currents in the picoampere range (typically 0.5–20 pA). J-FET amplifiers are preferred for high-impedance signal sources and precision DC measurements. General-purpose amplifiers offer higher bandwidth and slew rate, suitable for AC signal conditioning and audio applications.

Q3: The LM837M/NOPB is obsolete. Which substitute should I use for new designs?

A: For new designs requiring general-purpose amplification, the OPA4228UA is the highest-performance option with active product status, extended temperature range (-55°C to 85°C), and superior electrical characteristics. For cost-optimized designs, the AS324AMTR-E1 or AS324AMTR-G1 provide equivalent functionality with reduced power consumption. For extended-temperature applications, the LM2902EDR2G supports -40°C to 105°C. Verify supply voltage requirements: OPA4228UA supports 5–36 V, while AS324 and LM2902 support 3–36 V and 3–32 V respectively.

Q4: What is the difference between AS324AMTR-E1 and AS324AMTR-G1?

A: Both parts are manufactured by Diodes Incorporated with identical electrical specifications. The primary difference is packaging: AS324AMTR-E1 is Tape & Reel with MSL-1 moisture sensitivity, while AS324AMTR-G1 is also Tape & Reel but with MSL-3 moisture sensitivity (168-hour limit). Select based on your manufacturing environment and storage conditions.

Q5: Can I use LF247DT or LF347DT as a direct replacement?

A: LF247DT and LF347DT are J-FET amplifiers with different electrical characteristics. They provide superior input bias current (20 pA vs. 500 nA) but lower gain bandwidth product (3–4 MHz vs. 25 MHz). Use these parts only if your application requires high-impedance input coupling or precision DC measurements. Verify that your circuit design tolerates the reduced bandwidth and lower output current (40 mA is maintained, but slew rate is higher at 16 V/µs).

Q6: What does "Last Time Buy" status mean for LT1463CS#PBF?

A: Last Time Buy indicates that the manufacturer has announced end-of-life for this part. No new production is planned. Existing inventory may be available from distributors, but supply is limited and will eventually be exhausted. Use this part only if you have confirmed inventory availability and do not plan long-term production. For new designs, select an active substitute such as LT1465CS#PBF or OPA4228UA.

Q7: Are all substitute parts RoHS3 compliant?

A: Yes, all substitute parts listed are ROHS3 compliant. All parts are also REACH unaffected. Verify compliance documentation with your supplier if required for specific applications or markets.

Q8: What supply voltage range should I verify for my application?

A: The LM837M/NOPB requires exactly 36 V supply span. Substitute parts have varying supply ranges: OPA4228UA (5–36 V), AS324AMTR-E1/G1 (3–36 V), LM2902EDR2G (3–32 V), LF247DT (44 V), LF347D/DT (44 V), LT1463CS (10–30 V), and LT1465CS (10–30 V). Verify that your power supply voltage falls within the specified range for your selected substitute.

Q9: Which substitute has the lowest power consumption?

A: The AS324AMTR-E1 and AS324AMTR-G1 have the lowest supply current at 1 mA (x4 channels), compared to 10 mA for the LM837M/NOPB. The LT1463CS#PBF has the lowest supply current at 28 µA (x4 channels), but this part is Last Time Buy and has significantly reduced bandwidth (175 kHz). For active parts with low power consumption, select AS324AMTR-E1 or AS324AMTR-G1.

Q10: Can I mix different substitute parts in the same design?

A: Mixing different amplifier types (general-purpose and J-FET) in the same circuit is possible if each stage has different functional requirements. However, mixing different general-purpose amplifiers (e.g., OPA4228UA and AS324AMTR-E1) in the same circuit is not recommended due to differences in input bias current, offset voltage, and slew rate, which may cause performance inconsistencies. Use a single part number throughout the design for consistency.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message