LM2904DR2 - Dual 3-26V Operational Amplifier | onsemi
MPN: LM2904DR2 ✗ Tapus ng BuhayLM2904DR2 Ulas
An operational amplifier is a high-gain analog building block used to amplify voltage differences, buffer signals, compare voltages, and drive feedback-controlled circuits. The dual operational amplifier category belongs to the broader hierarchy of operational amplifier, linear amplifier, analog IC, and semiconductor. This makes the LM2904DR2 suitable for both general-purpose precision-adjacent signal conditioning and conventional industrial control circuits where a low-power, dual amplifier simplifies board layout.
The LM2904DR2 combines two amplifier channels in one 8-pin SOIC. Its single-supply operating range is listed as 3 V to 26 V, while the associated dual-supply capability supports operation from approximately plus or minus 16 V, corresponding to a 32 V total supply. The common-mode input range extends to ground in single-supply configurations and to VEE in split-supply configurations. These characteristics make each channel suitable for noninverting and inverting amplifier, voltage follower, comparator, and general feedback-control arrangements.
The low-power operating characteristics allow the device to be used in battery-powered instrumentation, industrial sensing, sensor interfaces, and control systems where dual-channel analog processing is required without a high-power amplifier family. Its differential inputs support feedback arrangements in which one input receives the source signal and the other receives the feedback or reference network. The two independent channels can also process different signals within the same package.
Typical applications include low-level sensor conditioning, current-loop receivers, audio preamplifier stages, active filtering, comparator circuits, and industrial control interfaces. In a current-loop receiver, for example, the amplifier can amplify a small voltage across a sense resistor while the common-mode range supports signals referenced toward the lower supply rail. In a dual-channel design, one channel can condition a measurement while the other performs monitoring or buffering.
Layout should prioritize short feedback paths, stable input grounding, and careful decoupling of the supply pins. Place the device close to the analog signal source when trace lengths permit, route high-impedance input nodes away from switching nodes, and use the manufacturer datasheet pin description table when assigning PCB tracks. Decoupling requirements, exact electrical limits, and compensation guidance should be taken directly from the applicable onsemi datasheet.
This page combines the exact LM2904DR2 ordering information with package, supply-voltage, application, and replacement guidance. It also distinguishes pin-compatible alternatives from merely similar amplifier functions, helping engineers evaluate PCB reuse, supply compatibility, and sourcing without changing the original 8-pin SOIC footprint.
Mga alternatibo na pwedeng ilagay na LM2904DR2 — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok LM2904DR2 (parehas na form factor at footprint) — pagkakaiba sa Common-Mode Input Range, Package, Amplifier Type, Number of Channels.
LM2904DR2G
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →LM2904DR
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →LM2904DT
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →LP2904DR
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
LM2904DR2 Mga Pinakamataas na Rating at Electrical Characteristics
| Amplifier Type | Dual general-purpose operational amplifier |
| Number of Channels | 2 channels |
| Single-Supply Operating Voltage | 3 V to 26 V |
| Dual-Supply Operating Voltage | ±16 V |
| Maximum Total Supply Voltage | 32 V |
| Packhaging | 8-pin SOIC |
| Uri ng Pagpapasok | Surface mount |
| Common-Mode Input Range | Extends to ground/VEE |
| Supply Configuration | Single supply or split supply |
| Power Class | Low power |
| Input Type | Differential input |
Pin Configuration ng LM2904DR2
| Pin 1 | OUT A — Output of amplifier A |
| Pin 2 | IN A- — Inverting input of amplifier A |
| Pin 3 | IN A+ — Non-inverting input of amplifier A |
| Pin 4 | V- — Negative supply or ground connection |
| Pin 5 | IN B+ — Non-inverting input of amplifier B |
| Pin 6 | IN B- — Inverting input of amplifier B |
| Pin 7 | OUT B — Output of amplifier B |
| Pin 8 | V+ — Positive supply connection |
Tipikal na mga Gamit
LM2904DR2 ay nararapat para sa 6 aplikasyons: Low-Level Sensor Signal Conditioning, Industrial Current-Loop Receiver, Battery-Powered Analog Monitor, Audio Preamplifier Stage, Voltage Comparator and Threshold Circuit, Active Filter and Control Loops.
Low-Level Sensor Signal Conditioning
The LM2904DR2 fits low-level sensor conditioning because each channel provides differential inputs and supports a common-mode range extending toward ground or VEE. According to the onsemi LM2904 datasheet, the amplifier operates from 3 V to 26 V in a single-supply configuration, allowing a sensor interface to share a relatively compact supply architecture. Place the amplifier near the sensor connection, use a direct feedback network, and verify that input and output excursions remain inside the electrical limits for the selected gain. The dual format also permits a second channel to provide reference buffering or monitoring without adding another 8-pin SOIC footprint.
Industrial Current-Loop Receiver
The LM2904DR2 can serve as the amplifier in a 4 mA to 20 mA current-loop receiver when the transmitter output includes a sense element and the required loop supply supports the device's 3 V to 26 V single-supply range. The common-mode input capability extending to ground is valuable for signals referenced near the lower rail. Keep the sense-resistor connection and feedback components close to the amplifier to reduce pickup of EMI. Confirm output swing, input common-mode limits, and stability for the exact loop impedance in the manufacturer datasheet before production release.
Battery-Powered Analog Monitor
A dual operational amplifier is useful in battery-powered monitoring equipment where two low-power analog channels are required without adding separate packages. The onsemi LM2904 datasheet identifies LM2904DR2 as a low-power, dual general-purpose amplifier with single-supply operation from 3 V to 26 V. One channel can amplify a sensor signal while the second buffers a reference or threshold signal. Power-consumption measurements should be taken in the final operating mode because bias current, feedback resistance, and output swing determine the actual battery load rather than the amplifier category alone.
Audio Preamplifier Stage
The LM2904DR2 is suitable for modest audio preamplification and active-filter stages that require two channels and conventional low-power operation. Its differential inputs support inverting or noninverting feedback configurations, while single- or split-supply operation permits integration with different analog rails. According to the onsemi LM2904 datasheet, the common-mode input range extends to ground or VEE. In audio layouts, keep input and feedback tracks short, maintain symmetrical grounding, and verify distortion and bandwidth requirements at the intended signal level because the general-purpose family is not specified here as a precision low-noise amplifier.
Voltage Comparator and Threshold Circuit
The two LM2904DR2 channels can implement independent voltage comparisons or a comparator paired with an analog-filter or output-conditioning function. The onsemi LM2904 datasheet identifies the device as a dual differential-input operational amplifier with a common-mode range extending toward ground or VEE, which is useful for thresholds near the lower supply rail. Select resistor values so the output remains inside its valid swing and check the input range around the actual reference voltage. A dedicated comparator may offer faster transition behavior, but LM2904DR2 can be appropriate where a general-purpose amplifier response is sufficient.
Active Filter and Control Loops
LM2904DR2 can implement first-order active filters, integrators, and basic feedback-control loops when the required bandwidth and slew rate fall within the selected amplifier's electrical limits. According to the onsemi LM2904 datasheet, the device provides two channels and supports both single and split supplies. Use stable resistor and capacitor values, keep the feedback network compact, and avoid routing the high-impedance summing or integration node beside switching equipment. Confirm gain-bandwidth, slew rate, output swing, and stability behavior in the manufacturer datasheet for the intended closed-loop configuration.
Impormasyon ng Talumpati sa Engineering for LM2904DR2 — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | LM2904DR2G | LM2904DR | LM2904DT | LP2904DR |
|---|---|---|---|---|---|
| Brand | onsemi | onsemi | Texas Instruments | STMicroelectronics | Texas Instruments |
| Package | 8-pin SOIC | 8-pin SOIC - same | 8-pin SOIC - same | 8-pin SOIC - same | 8-pin SOIC - same |
| Number of Amplifier Channels | 2 | 2 | 2 | 2 | 2 |
| Mounting Type | Surface mount | Surface mount | Surface mount | Surface mount | Surface mount |
Pangunahing mga Pagkakaiba
- Native onsemi ordering with the target LM2904 family (kumpara saTI LM2904DR)
- Direct manufacturer-family option in the same footprint (kumpara saSTMicroelectronics LM2904DT)
- General-purpose LM2904 positioning rather than the lower-power LP2904 line (kumpara saTI LP2904DR)
Talaan ng Disenyo
Route each differential input pair as a compact, closely coupled signal path and keep the feedback components adjacent to the corresponding amplifier pins. High-impedance input nodes should remain away from switching-regulator outputs, relay contacts, and other noisy analog sections. Place the decoupling network at the power pins and use the onsemi LM2904 datasheet's recommended network and layout to minimize supply-to-output coupling.
Validate the complete supply range before applying the device, especially for single-supply operation near 3 V and split-supply operation near ±16 V. The input common-mode range, output swing, and absolute maximum limits are not identical constraints, so verify that the sensor source, reference voltage, and expected output remain valid over load, temperature, and supply tolerance. Add bulk and local decoupling according to the manufacturer guidance.
Do not assume that every LM2904-family ordering code has identical electrical ratings. LM2904DR2G, TI LM2904DR, STMicroelectronics LM2904DT, and TI LP2904DR use the same 8-pin SOIC format, but pin function, temperature range, input bias current, offset voltage, bandwidth, slew rate, output swing, and lifecycle status can differ by manufacturer and product line. Approve a replacement only after checking both datasheets and the original PCB.
For current-loop or sensor interfaces, terminate the input close to the amplifier and use a differential return path rather than relying on a long shared ground trace. Keep the sense element and amplifier input electrically compact so that externally induced noise does not become differential signal error. Evaluate conducted and radiated immunity in the final enclosure because the package's low-power operation does not by itself guarantee system-level EMI performance.
Impormasyon ng Pagsunod sa Kautusan
No target-specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals statement was established from the supplied product records. AEC-Q100 qualification is not indicated for this general-purpose amplifier.