NJM2904D NJR Integrated Circuit (Dual-In-Line Packages) In Stock
NJR NJM2904D is a dual operational amplifier in an 8-pin DIP package, featuring 85 dB common-mode rejection ratio, 7000 µV max input offset voltage, and 0.25 µA max bias current. It uses voltage-feedback architecture with internal frequency compensation. From $0.50 in stock with worldwide shipping.
- Manufacturer
- NJR
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- NOT RECOMMENDED
- Datasheet
- NJM2904D Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1902(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual op-amp with 85 dB CMRR and 0.25 µA max input bias current for precision low-frequency signal conditioning
- Internal frequency compensation eliminates external capacitor requirements, simplifying circuit design in voltage-feedback applications
- 8-pin DIP (R-PDIP-T8) package for easy breadboard prototyping and through-hole PCB assembly
Applications
The NJM2904D dual operational amplifier is suited for low-frequency analog signal conditioning, comparator circuits, and audio preamplifier stages in consumer electronics and industrial sensor interfaces. Its 85 dB CMRR and 0.25 µA bias current make it effective for differential signal amplification in strain gauge bridges, thermocouple amplifiers, and battery-powered instrumentation. The standard 8-pin DIP package is widely compatible with existing socket footprints and legacy PCB designs.
Specifications
| Factory Lead Time | 16Weeks |
| YTEOL | 3 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | VOLTAGE-FEEDBACK |
| Average Bias Current-Max (IIB) | 0.25 µA |
| Bias Current-Max (IIB) @25C | 0.25 µA |
| Common-mode Reject Ratio-Nom | 85dB |
| Frequency Compensation | YES |
| Input Offset Voltage-Max | 7000 µV |
| JESD-30 Code | R-PDIP-T8 |
| JESD-609 Code | e6 |
| Low-Bias | NO |
| Low-Offset | NO |
| Micropower | YES |
| Number of Functions | 2 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Power | NO |
| Programmable Power | NO |
| Qualification Status | Not Qualified |
| Slew Rate-Nom | 0.5V/us |
| Supply Current-Max | 1.2mA |
| Supply Voltage Limit-Max | 32V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | TIN BISMUTH |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Unity Gain BW-Nom | 200 |
| Wideband | NO |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for NJM2904D:
suggested
suggested
suggested
suggested
Frequently Asked Questions
What does the 85 dB CMRR of NJM2904D mean for differential sensor signal amplification?
The NJM2904D achieves 85 dB common-mode rejection ratio (CMRR), meaning it attenuates common-mode noise — such as 50 Hz or 60 Hz mains interference — by a factor of approximately 178,000 relative to the differential signal. This makes it effective for amplifying small differential outputs from strain gauges, thermocouples, and Wheatstone bridges in industrial sensor conditioning, where supply noise and ground loops can otherwise corrupt measurements.
How does the 7000 µV input offset voltage of NJM2904D limit its suitability for precision DC amplification?
The NJM2904D has a maximum input offset voltage of 7000 µV (7 mV), which is relatively high compared to precision op-amps rated below 100 µV. This limits its DC accuracy at high gain settings; at a gain of 100, the 7 mV offset produces a 700 mV output error. It is best suited for AC-coupled audio amplifiers, comparator circuits, and low-gain sensor interfaces where DC offset is trimmed or irrelevant, rather than precision DC instrumentation.
When is the NJM2904D a cost-effective alternative to the LM358 dual op-amp in a design?
The NJM2904D is a drop-in functional equivalent to the industry-standard LM358 dual operational amplifier, sharing the 8-pin DIP pinout, single-supply capability, and voltage-feedback architecture. NJR's NJM2904D can offer competitive pricing for high-volume Japanese-manufactured components and is sourced from a dedicated analog IC supplier. With a 16-week lead time, it is best to confirm availability for production runs; for prototyping, the 8-pin DIP package allows direct socket substitution.
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Why Buy from FindMyChip
About NJR
NJR is a leading electronic component manufacturer. FindMyChip sources NJR ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
More from NJR
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.0869 | $1.09 |
| 5+ | $0.3450 | $1.72 |
| 915+ | $0.2195 | $200.84 |
| 1180+ | $0.2121 | $250.28 |
| 1580+ | $0.1902 | $300.52 |
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