| Part Number | Manufacturer | Composite Price | Description | Compare |
|---|---|---|---|---|
| RM4157D | Raytheon Semiconductor | Check for Price | Operational Amplifier, 4 Func, 5000uV Offset-Max, BIPolar, CDIP14 | LM149J vs RM4157D |
Part Details for LM149J by Texas Instruments
Results Overview of LM149J by Texas Instruments
- Distributor Offerings: (0 listings)
- Number of FFF Equivalents: (1 replacement)
- Tariff Estimator: (Available) NEW
- Number of Functional Equivalents: (2 options)
- CAD Models: (Request Part)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
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LM149J Information
LM149J by Texas Instruments is an Operational Amplifier.
Operational Amplifiers are under the broader part category of Amplifier Circuits.
Amplifier circuits use external power to increase the amplitude of an input signal. They can be used to perform linear amplifications or logarithmic functions. Read more about Amplifier Circuits on our Amplifier Circuits part category page.
US Tariff Estimator: LM149J by Texas Instruments
Calculations from this tool are estimations only for imports into the United States. Please refer to the distributor or manufacturer and reference official US government sources and authorities to verify any final purchase costs.
LM149J Part Data Attributes
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LM149J
Texas Instruments
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Datasheet
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LM149J
Texas Instruments
QUAD OP-AMP, 6000uV OFFSET-MAX, 4MHz BAND WIDTH, CDIP14, CERAMIC, DIP-14
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| Rohs Code | No | |
| Part Life Cycle Code | Obsolete | |
| Package Description | Dip, Dip14,.3 | |
| Reach Compliance Code | Unknown | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.33.00.01 | |
| Amplifier Type | Operational Amplifier | |
| Architecture | Voltage-Feedback | |
| Average Bias Current-Max (IIB) | 0.325 µA | |
| Bias Current-Max (IIB) @25C | 0.1 µA | |
| Common-mode Reject Ratio-Min | 70 Db | |
| Common-mode Reject Ratio-Nom | 90 Db | |
| Frequency Compensation | Yes (Avcl>=5) | |
| Input Offset Voltage-Max | 6000 µV | |
| JESD-30 Code | R-GDIP-T14 | |
| JESD-609 Code | e0 | |
| Low-Bias | No | |
| Low-Offset | No | |
| Micropower | No | |
| Neg Supply Voltage Limit-Max | -22 V | |
| Neg Supply Voltage-Nom (Vsup) | -15 V | |
| Number of Functions | 4 | |
| Number of Terminals | 14 | |
| Operating Temperature-Max | 125 °C | |
| Operating Temperature-Min | -55 °C | |
| Package Body Material | Ceramic, Glass-Sealed | |
| Package Code | DIP | |
| Package Equivalence Code | DIP14,.3 | |
| Package Shape | Rectangular | |
| Package Style | In-Line | |
| Power | No | |
| Programmable Power | No | |
| Qualification Status | Not Qualified | |
| Slew Rate-Nom | 2 V/Us | |
| Supply Current-Max | 3.6 Ma | |
| Supply Voltage Limit-Max | 22 V | |
| Supply Voltage-Nom (Vsup) | 15 V | |
| Surface Mount | No | |
| Technology | Bipolar | |
| Temperature Grade | Military | |
| Terminal Finish | Tin/Lead (Sn/Pb) | |
| Terminal Form | Through-Hole | |
| Terminal Pitch | 2.54 Mm | |
| Terminal Position | Dual | |
| Unity Gain BW-Nom | 4000 | |
| Voltage Gain-Min | 50000 | |
| Wideband | No |
Alternate Parts for LM149J
This table gives cross-reference parts and alternative options found for LM149J. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of LM149J, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
LM149J Frequently Asked Questions (FAQ)
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The maximum power dissipation of the LM149J is 670mW, which is calculated based on the maximum junction temperature (150°C) and the thermal resistance (100°C/W) specified in the datasheet.
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While the LM149J is an op-amp, it can be used as a comparator in certain applications. However, it's not recommended for high-speed or high-frequency comparator applications due to its limited slew rate (13V/μs) and bandwidth (3MHz).
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To ensure stability, make sure to follow the recommended compensation techniques outlined in the datasheet, such as using a capacitor in the feedback loop to reduce the gain at high frequencies. Additionally, ensure that the feedback loop has a sufficient phase margin (>45°) to prevent oscillations.
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The input impedance of the LM149J is typically around 2MΩ, which is relatively high. This makes it suitable for use in high-impedance applications, such as audio circuits or sensor interfaces.
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Yes, the LM149J can be used in a single-supply configuration, but it requires careful consideration of the input common-mode range and output voltage swing. The input common-mode range is typically limited to within 2V of the supply rails, and the output voltage swing is reduced when operating from a single supply.