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LM2902NSR Equivalent & Substitute Parts
Part Overview
The LM2902NSR is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, configured as a 4-circuit device in a 14-SOIC surface mount package. This part is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The LM2902NSR operates across a wide supply voltage range of 3V to 26V and maintains performance across industrial temperature ranges from -40°C to 125°C. Equivalent and substitute parts are necessary due to inventory constraints, product lifecycle status, and application-specific requirements such as automotive qualification or enhanced supply voltage specifications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 4 | — |
| Slew Rate | 0.5 | V/µs |
| Gain Bandwidth Product | 1.2 | MHz |
| Current - Input Bias | 20 | nA |
| Voltage - Input Offset | 3 | mV |
| Current - Supply (x4 Channels) | 1.4 | mA |
| Current - Output / Channel | 30 | mA |
| Voltage - Supply Span (Min) | 3 | V |
| Voltage - Supply Span (Max) | 26 | V |
| Operating Temperature | -40 to 125 | °C |
| Mounting Type | Surface Mount | — |
| Package / Case | 14-SOIC (0.209", 5.30mm Width) | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the LM2902NSR is determined by strict electrical and mechanical compatibility across the following critical parameters:
Primary Substitution Criteria:
- Number of circuits: Must equal 4
- Amplifier type: Must be General Purpose
- Mounting type: Must be Surface Mount
- Package type: Must be 14-SOIC or 14-SO
- Supply voltage range: Minimum 3V, maximum ≥26V
- Operating temperature range: Must encompass -40°C to 125°C or be compatible with application requirements
- RoHS compliance: ROHS3 Compliant preferred for regulatory alignment
Secondary Compatibility Parameters:
- Slew rate: 0.4V/µs to 0.5V/µs acceptable
- Gain bandwidth product: 1.0 MHz to 1.3 MHz acceptable
- Input bias current: 2 nA to 45 nA acceptable
- Input offset voltage: 2 mV to 3 mV acceptable
- Output current per channel: 30 mA to 40 mA acceptable
Substitute parts are grouped into two categories: direct replacements maintaining identical electrical specifications and functional equivalents with minor parameter variations within acceptable engineering tolerances.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Slew Rate (V/µs) | GBW (MHz) | Input Bias (nA) | Input Offset (mV) | Supply Max (V) | Temp Range (°C) | Package | RoHS |
|---|---|---|---|---|---|---|---|---|---|---|
| LM2902NSR | Texas Instruments | Last Time Buy | 0.5 | 1.2 | 20 | 3 | 26 | -40 to 125 | 14-SOIC (5.30mm) | ROHS3 |
| LM2902KAVQDR | Texas Instruments | Active | 0.5 | 1.2 | 20 | 3 | 30 | -40 to 125 | 14-SOIC (3.90mm) | ROHS3 |
| LM2902D | onsemi | Obsolete | 0.5 | 1.2 | 20 | 3 | 26 | -40 to 125 | 14-SOIC (3.90mm) | Non-compliant |
| LM324AD | STMicroelectronics | Active | 0.4 | 1.3 | 20 | 2 | 30 | 0 to 70 | 14-SOIC (3.90mm) | ROHS3 |
| LM324AM/NOPB | Texas Instruments | Active | — | 1 | 45 | 2 | 32 | 0 to 70 | 14-SOIC (3.90mm) | ROHS3 |
| LM324AMX/NOPB | Texas Instruments | Active | — | 1 | 45 | 2 | 32 | 0 to 70 | 14-SOIC (3.90mm) | ROHS3 |
| LM324D | STMicroelectronics | Active | 0.4 | 1.2 | 20 | 2 | 30 | 0 to 70 | 14-SOIC (3.90mm) | ROHS3 |
| LM324M/NOPB | Texas Instruments | Active | — | 1 | 45 | 2 | 32 | 0 to 70 | 14-SOIC (3.90mm) | ROHS3 |
| LM324MX/NOPB | Texas Instruments | Active | — | 1 | 45 | 2 | 32 | 0 to 70 | 14-SOIC (3.90mm) | ROHS3 |
| LP2902M/NOPB | Texas Instruments | Active | 0.05 | 0.1 | 2 | 2 | 26 | -40 to 85 | 14-SOIC (3.90mm) | ROHS3 |
| LP2902MX/NOPB | Texas Instruments | Active | 0.05 | 0.1 | 2 | 2 | 26 | -40 to 85 | 14-SOIC (3.90mm) | ROHS3 |
Engineering Selection Recommendations
Tier 1 - Direct Replacement (Preferred):
LM2902KAVQDR is the primary recommended substitute. This part maintains identical electrical specifications to the LM2902NSR (0.5V/µs slew rate, 1.2 MHz gain bandwidth product, 20 nA input bias current, 3 mV input offset voltage) while offering extended maximum supply voltage to 30V. The part carries Active product status with higher inventory availability (25,200 units). It includes AEC-Q100 automotive qualification and is ROHS3 compliant. The package width differs (3.90mm versus 5.30mm), but both are 14-SOIC configurations suitable for surface mount assembly.
Tier 2 - Functional Equivalents (Extended Temperature Range):
LM324D and LM324AD from STMicroelectronics provide electrical compatibility with minor parameter variations. Both maintain 4-circuit configuration, 14-SOIC packaging, and ROHS3 compliance. However, operating temperature range is restricted to 0°C to 70°C, making these unsuitable for applications requiring -40°C to 125°C performance. These parts are appropriate only when application temperature requirements do not exceed 0°C to 70°C.
Tier 3 - Functional Equivalents (Reduced Performance):
LM324AM/NOPB, LM324AMX/NOPB, LM324M/NOPB, and LM324MX/NOPB from Texas Instruments offer 4-circuit general-purpose amplifier functionality with extended supply voltage to 32V and ROHS3 compliance. These parts feature reduced gain bandwidth product (1 MHz versus 1.2 MHz) and higher input bias current (45 nA versus 20 nA). Operating temperature is limited to 0°C to 70°C. Selection is appropriate for applications with relaxed bandwidth and bias current requirements and temperature ranges within 0°C to 70°C.
Tier 4 - Low-Power Alternative:
LP2902M/NOPB and LP2902MX/NOPB are low-power variants with significantly reduced slew rate (0.05V/µs versus 0.5V/µs) and gain bandwidth product (100 kHz versus 1.2 MHz). Supply current is reduced to 85µA. These parts are suitable only for low-frequency, low-power applications and are not recommended as general substitutes for the LM2902NSR.
Obsolete Status:
LM2902D from onsemi is classified as Obsolete with non-compliant RoHS status. This part is not recommended for new designs despite electrical compatibility.
Frequently Asked Questions (FAQ)
Q: Can LM2902KAVQDR directly replace LM2902NSR in existing designs?
A: Yes. LM2902KAVQDR maintains identical electrical specifications and 4-circuit configuration. The package width differs (3.90mm versus 5.30mm), but both are 14-SOIC surface mount packages. PCB layout verification is required to confirm package footprint compatibility. The extended maximum supply voltage (30V versus 26V) provides additional design margin.
Q: What is the difference between LM2902NSR and LM324 series parts?
A: Both are 4-circuit general-purpose operational amplifiers in 14-SOIC packages. The LM2902 series maintains 0.5V/µs slew rate and 1.2 MHz gain bandwidth product across extended temperature range (-40°C to 125°C). The LM324 series offers reduced gain bandwidth product (1 MHz) and higher input bias current (45 nA) with restricted operating temperature (0°C to 70°C). Selection depends on application bandwidth and temperature requirements.
Q: Why is LM2902D listed as obsolete?
A: LM2902D from onsemi is classified as Obsolete with non-compliant RoHS status. While electrically compatible, this part is not recommended for new designs due to discontinued production and regulatory non-compliance. Active alternatives with ROHS3 compliance are available.
Q: Can LP2902MX/NOPB replace LM2902NSR?
A: No. LP2902MX/NOPB is a low-power variant with significantly reduced performance specifications. Slew rate is 0.05V/µs (versus 0.5V/µs), gain bandwidth product is 100 kHz (versus 1.2 MHz), and maximum output current is 10 mA per channel (versus 30 mA). This part is suitable only for low-frequency, low-power applications and is not a general substitute.
Q: What packaging considerations apply to substitution?
A: LM2902NSR uses 14-SOIC with 5.30mm width. Most substitute parts use 14-SOIC with 3.90mm width. Both are surface mount packages with identical pin count and function. PCB footprint compatibility must be verified before substitution. Narrower package width (3.90mm) is physically compatible with wider footprints (5.30mm) with proper placement verification.
Q: Are there temperature range limitations with substitute parts?
A: Yes. LM2902NSR operates -40°C to 125°C. LM324 series variants operate 0°C to 70°C. LP2902 series operates -40°C to 85°C. Application temperature requirements must be verified before substitution. Parts with restricted temperature ranges are unsuitable for industrial or automotive applications requiring full -40°C to 125°C performance.
Q: What is the inventory status of substitute parts?
A: LM2902KAVQDR has highest availability (25,200 units). LM324MX/NOPB has 50,513 units. LM324AMX/NOPB has 36,756 units. LM2902NSR has 2,200 units (Last Time Buy status). Inventory levels should be verified with suppliers for long-term production planning.
Q: Are all substitute parts ROHS3 compliant?
A: Most active substitute parts are ROHS3 compliant. LM2902D from onsemi is non-compliant. Regulatory compliance must be verified for applications subject to RoHS requirements.
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