LM2904N - Dual 1 MHz 26 V Op Amp | Texas Instruments
MPN: LM2904N ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.1147 | $0.11 |
| 10 | $0.1147 | $1.15 |
| 100 | $0.1147 | $11.47 |
| 500 | $0.1147 | $57.35 |
| 1,000 | $0.1147 | $114.70 |
LM2904N Overview
An operational amplifier is an analog integrated circuit that uses high open-loop gain to amplify the difference between two input voltages. Internally compensated LM2904N amplifiers are voltage-amplifier building blocks within the operational-amplifier, analog IC, and semiconductor hierarchies. Their differential inputs support filtering, buffering, summing, comparison, and feedback-control functions without requiring an external compensation network.
The verified product information identifies two amplifiers, single-supply or split-supply use, low power drain, and a common-mode input range extending to ground or VEE. Its internally frequency-compensated architecture simplifies closed-loop design, while the dual configuration places two matched-function amplifiers in one package. However, the supplied data does not state output-current capability, input-offset voltage, input-bias current, slew rate, noise density, or operating-temperature limits.
A key design consideration is supply configuration. Although the official TI product-page snippet specifies a 26 V product family designation, engineers must consult the exact manufacturer datasheet before setting rail voltage, input common-mode limits, output swing, and load current. Decoupling capacitance, input impedance, feedback topology, output loading, and thermal dissipation also remain datasheet- and layout-dependent.
Typical uses include two-channel sensor conditioning, low-frequency active filters, audio preamplification, comparator-style signal detection with suitable saturation limits, control-loop buffering, and general dual-rail analog signal processing. The 1 MHz bandwidth is most appropriate for low-to-moderate-frequency signals rather than high-speed precision instrumentation.
This data page combines verified manufacturer and distributor facts, pin-compatible replacement screening, and practical engineering guidance. It deliberately leaves unverified electrical values marked for completion rather than inferring specifications from related dual-amplifier families.
Drop-in alternatives for LM2904N — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LM2904N (same form factor and footprint) — differing in Mounting Type, Common-Mode Input Range, Input Type, Package, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LM2904N
✅ Drop-In✓ In Stock
$0.1147 / Unit
View Datasheet →LM2904N/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
KA358
✅ Drop-In📋 Reference alternative (not in catalog)
LM2904N Maximum Ratings & Electrical Characteristics
| Amplifier Count | 2 amplifiers |
| Product Family Supply Designation | 26 V |
| Gain-Bandwidth Product | 1 MHz |
| Topology | Dual independent operational amplifiers |
| Compensation | Internally frequency compensated |
| Supply Configuration | Single supply or split supply |
| Common-Mode Input Range | Extending to ground/VEE |
| Output Type | Push-pull |
| Package | 8-pin PDIP |
| Mounting Type | Through-hole |
| Input Type | Differential |
| Product Classification | Standard general-purpose amplifier |
| RoHS Status | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
LM2904N 8-pin pdip Pin Configuration Guide
Pin configuration for LM2904N (8-pin pdip package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for LM2904N.
Refer to the datasheet for full pin configuration.
Typical Applications
LM2904N is suitable for 6 applications: Two-Channel Sensor Conditioning, Low-Frequency Active Filters, Audio Preamplification, Industrial Control Interfaces, Portable Sensor and IoT Nodes, Teaching and Prototyping Circuits.
Two-Channel Sensor Conditioning
The two independent amplifiers in LM2904N can condition two related sensor outputs when the signals fall within the device's verified 1 MHz bandwidth and available common-mode range. Each channel can implement a voltage buffer, non-inverting gain stage, or active-filter section with external resistors and capacitors. The internally frequency-compensated architecture reduces the need for external compensation, while the 8-pin PDIP package simplifies through-hole prototyping. Confirm the exact input-offset, bias-current, noise, supply-voltage, and common-mode limits before selecting resistor and capacitor values, especially for high-impedance sensors where bias-current effects can dominate.
Recommended
Low-Frequency Active Filters
LM2904N is suitable for first and second-order active-filter experiments and control panels because each internally compensated amplifier can work with external resistors and capacitors. The verified 1 MHz gain-bandwidth product leaves ample bandwidth for many low-frequency filter stages, including audio, vibration, and industrial process-control bands. Component tolerances and amplifier open-loop behavior will influence cutoff accuracy, gain, and phase. Validate stability, common-mode headroom, output swing, and load drive in the intended rail-to-rail operating conditions; none of those detailed limits was available in the supplied snippets.
Recommended
Audio Preamplification
LM2904N can serve as a general-purpose dual audio preamplifier for low-to-moderate-frequency signals, using one channel per stereo or differential audio path. Its verified 1 MHz bandwidth exceeds the bandwidth commonly needed for baseband audio, and its dual internal frequency compensation supports straightforward closed-loop gain configurations. The through-hole 8-PDIP package is useful for hand-built and educational equipment. Audio performance still depends on the exact noise, distortion, output-swing, slew-rate, and load specifications, which must be verified from the manufacturer data sheet before setting gain or driving a particular output stage.
Recommended
Industrial Control Interfaces
The dual LM2904N architecture can buffer two low-frequency control or measurement channels in industrial equipment while retaining a familiar through-hole package for serviceability. Its verified support for single- or split-supply operation allows grounding around zero-centered signals, and the common-mode range extending toward ground or VEE is useful for sensor interfaces. Designers must still budget analog input range, output swing, supply noise rejection, and transient margin. The 26 V family designation is not a substitute for the exact supply-voltage and absolute-maximum tables required by industrial equipment safety and reliability programs.
Recommended
Portable Sensor and IoT Nodes
LM2904N can amplify or buffer slow sensor channels in a battery-powered IoT node when its supply current and common-mode limits fit the available power budget. The verified source does not provide a numeric quiescent current, so battery-life calculations cannot be completed from the supplied evidence. Two channels in one package can reduce board-space needs in prototypes, while internal frequency compensation supports standard feedback networks. Measure input bias current with high-impedance sensors and verify supply rejection, noise, output range, and shutdown requirements before adopting it for low-energy production hardware.
Recommended
Teaching and Prototyping Circuits
LM2904N is a practical choice for electronics education because it packages two independent, internally frequency-compensated amplifiers in an easy-to-probe 8-pin PDIP. Students can implement inverting and non-inverting amplifiers, integrators, filters, comparators, and feedback-control demonstrations without a complex compensation network. The verified 1 MHz bandwidth is sufficient for many audible and low-frequency control experiments. Before using it as a comparator, account for output saturation and recovery behavior; before using it as a precision reference amplifier, check offset, drift, bias current, and noise from the exact data sheet.
Recommended
Engineering reference data for LM2904N — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM2904N | LM2904N/NOPB | KA358 |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics |
Key Differentiators
- Verified dual internally compensated architecture (vs KA358)
- Through-hole DIP land-pattern continuity (vs LM2904D)
- Single- and split-supply architecture (vs LM2904D)
Design Notes
Confirm the exact recommended supply range before connecting LM2904N. The verified 26 V label is a product-family designation, not a substitute for the ordering-specific operating and absolute-maximum tables. Place a local bypass capacitor near each supply pin and provide a low-impedance return path. For single-supply operation, explicitly check whether the signal can remain inside the common-mode range and whether the output can reach the required swing at the selected load.
Keep op-amp input and feedback routes short, preserve a continuous ground or supply-return plane, and avoid routing high-current or switching-node traces adjacent to sensitive amplifier inputs. The through-hole package provides forgiving prototype accessibility, but long breadboard or lead wires can add parasitic capacitance and pickup. For high-source-impedance sensors, minimize leakage paths and guard routing because the supplied evidence does not provide input-bias-current values.
Do not assume that an LM2904-family name guarantees drop-in interchangeability across package suffixes or manufacturers. LM2904D is described in the supplied comparison result as SOIC-8, while LM2904N is PDIP-8; those packages require different PCB land patterns. Also do not infer the full LM2904N supply range from the 26 V snippet. Verify pinout, supply limits, common-mode range, offset, bias current, bandwidth, slew rate, noise, output swing, and temperature grade from the exact data sheet.
Internal frequency compensation removes the usual need for a discrete compensation capacitor, but it does not guarantee stability with every external network. Check the manufacturer's recommended noise-gain and capacitive-load conditions, especially when driving long cables, ADC inputs, loudspeakers, or other capacitance. At 1 MHz gain-bandwidth product, reserve bandwidth for the intended closed-loop gain and evaluate phase margin if unusually high gain or additional poles are introduced.
Compliance Information
The verified search results do not provide suffix-specific environmental or automotive declarations. No compliance claim should be inferred from the component category or general distributor availability.
