LM2902DG4 - Quad 1.2MHz Op Amp, 26V | Texas Instruments
MPN: LM2902DG4 ✓ NakahandaLM2902DG4 Ulas
A general-purpose operational amplifier is an analog IC that amplifies the voltage difference between its non-inverting and inverting inputs. The LM2902 belongs to the operational-amplifier hierarchy, which includes instrumentation, comparator, voltage-feedback, and current-feedback devices. Four independent sections allow a single LM2902DG4 to implement functions such as sensing, buffering, error amplification, active filtering, and output-current buffering when their common-mode, voltage, and timing requirements overlap.
The LM2902's principal characteristics include four amplifier circuits, a 1.2 MHz gain-bandwidth product, a 0.5 V/µs slew rate, and a typical supply-current drain of 0.8 mA. Its input offset voltage is specified as 2 mV, while the operating supply range extends to 26 V on a single supply or ±13 V from a split supply. These characteristics make the device appropriate for general-purpose industrial control, analog signal conditioning, and low-to-moderate-frequency closed-loop applications.
The LM2902 is designed around four internally compensated, high-gain operational-amplifier sections. Its 1.2 MHz gain-bandwidth product limits the closed-loop bandwidth achievable at a given noise gain, while the 0.5 V/µs slew rate governs large-signal response. Because all four sections share the same package and supply pins, layout should preserve short feedback paths and provide suitable supply bypassing close to the device.
Typical uses include transducer-signal conditioning, low-frequency active filters, industrial sensor interfaces, control-loop error amplifiers, and analog signal buffers. A single package is particularly useful when a board needs several similar amplifier channels and designers want to reduce component count. For applications requiring precision offsets, wider bandwidth, lower noise, rail-to-rail inputs or outputs, or automotive qualification, the design should use a more specialized amplifier rather than assume the LM2902 provides those capabilities.
When laying out a board, place the bypass capacitor at the supply pins and route feedback components close to the relevant amplifier section. Check input and output swing against the actual load because the usable signal range depends on the supply voltage and output-load conditions. For stable operation, confirm that the intended noise gain and closed-loop gain are compatible with the 1.2 MHz gain-bandwidth product and that the resulting output slew requirement remains below 0.5 V/µs.
This page organizes the LM2902DG4 specifications, pinout, practical design guidance, application examples, and verified drop-in alternatives into one engineering reference. It also separates core device characteristics from procurement details so designers can evaluate the amplifier's package, supply range, bandwidth, and replacement options before committing it to a PCB design.
Mga alternatibo na pwedeng ilagay na LM2902DG4 — 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 LM2902DG4 (parehas na form factor at footprint) — pagkakaiba sa Amplifier Type, Package, Input Offset Voltage, Number of Pins, Operating Temperature Range.
LM2902DT
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →LM2902DR
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →LM2902DRE4
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →LM2902DR2G
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →LM2902KDR
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
LM2902DG4 Mga Pinakamataas na Rating at Electrical Characteristics
| Amplifier Type | General Purpose |
| Number of Amplifier Circuits | 4 |
| Architecture | Quad |
| Maximum Supply Voltage, Single Supply | 26 V |
| Maximum Supply Voltage, Split Supply | ±13 V |
| Operating Supply Range, Split Supply | ±1.5 V to ±13 V |
| Gain-Bandwidth Product | 1.2 MHz |
| Slew Rate | 0.5 V/µs |
| Input Offset Voltage | 2 mV |
| Typical Supply-Current Drain | 0.8 mA |
| Packhaging | 14-SOIC, 3.90 mm width |
| Packaging | Tube |
| Uri ng Pagpapasok | Surface Mount |
| Bilang ng Pins | 14 |
| Automotive Qualification | Not stated for LM2902DG4 |
Pin Configuration ng LM2902DG4
| Pin 1 | OUT1 — Output of amplifier section 1 |
| Pin 2 | IN1- — Inverting input of amplifier section 1 |
| Pin 3 | IN1+ — Non-inverting input of amplifier section 1 |
| Pin 4 | V- — Negative supply connection |
| Pin 5 | IN2+ — Non-inverting input of amplifier section 2 |
| Pin 6 | IN2- — Inverting input of amplifier section 2 |
| Pin 7 | OUT2 — Output of amplifier section 2 |
| Pin 8 | OUT3 — Output of amplifier section 3 |
| Pin 9 | IN3- — Inverting input of amplifier section 3 |
| Pin 10 | IN3+ — Non-inverting input of amplifier section 3 |
| Pin 11 | V+ — Positive supply connection |
| Pin 12 | IN4- — Inverting input of amplifier section 4 |
| Pin 13 | IN4+ — Non-inverting input of amplifier section 4 |
| Pin 14 | OUT4 — Output of amplifier section 4 |
Tipikal na mga Gamit
LM2902DG4 ay nararapat para sa 6 aplikasyons: Industrial Sensor Signal Conditioning, Audio and Communication Buffering, Active Low-Frequency Filtering, Control-System Error Amplification, Power-Supply Feedback and Monitoring, Test and Measurement Input Conditioning.
Industrial Sensor Signal Conditioning
The LM2902DG4 is suitable for conditioning low-frequency sensor signals when the design requires several amplifier channels and a supply range reaching 26 V. Its four general-purpose sections can provide non-inverting or inverting amplification, input conditioning, and output buffering within one 14-SOIC package. The 1.2 MHz gain-bandwidth product supports modest closed-loop bandwidth, while the 0.5 V/µs slew rate should be checked against transient requirements. Designers should also confirm the input common-mode range and output swing for the selected supply voltage.
Inirekomenda
Audio and Communication Buffering
The LM2902DG4 can buffer several low-frequency audio or communication signals in equipment that does not require rail-to-rail operation. Its 0.5 V/µs slew rate produces full-scale output transition capability appropriate for modest bandwidth signals, while the 1.2 MHz gain-bandwidth product constrains high-gain closed-loop response. Use each independent section for buffering or fixed-gain amplification, and confirm output-current capability, output swing, and capacitive-load stability for the attached line.
Inirekomenda
Active Low-Frequency Filtering
The four independently compensated amplifiers in LM2902DG4 can implement active filters, integrators, or multi-stage gain blocks in low-frequency analog systems. A 1.2 MHz gain-bandwidth product provides useful loop bandwidth for modest closed-loop gains, but component tolerances and the amplifier's input offset can influence filter accuracy. Keep feedback components close to their associated amplifier pins, verify noise gain for each stage, and test stability with the intended source and load impedances.
Inirekomenda
Control-System Error Amplification
LM2902DG4 can provide error amplification, reference comparison, and actuator-command conditioning in industrial or embedded control systems. Its 26 V single-supply capability is useful when signals originate from higher-voltage sensors, while four channels can support multiple loops without requiring four packages. The 0.5 V/µs slew rate and 1.2 MHz gain-bandwidth product should be compared with the control-loop bandwidth and required settling time. Input offset of 2 mV must be included when assessing steady-state control accuracy.
Inirekomenda
Power-Supply Feedback and Monitoring
The LM2902DG4 can monitor a regulated supply, amplify the difference between a feedback node and a reference, and provide additional signal conditioning for power-system diagnostics. Its broad single-supply operating range up to 26 V is advantageous in higher-voltage control boards, although the input common-mode limits must be checked before connecting the feedback node. Use low-leakage resistors around high-impedance feedback networks and confirm that offset and drift are acceptable for the required measurement accuracy.
Inirekomenda
Test and Measurement Input Conditioning
The LM2902DG4 can form the input-conditioning section of a general-purpose measurement instrument by combining differential excitation, gain, and buffering functions across its four channels. The 2 mV input offset is manageable for coarse measurements but may be important in precision instrumentation. The 1.2 MHz gain-bandwidth product supports low- and moderate-frequency measurements, and the 0.5 V/µs slew rate helps reproduce waveforms without excessive slew distortion. Validate noise, settling, and input-range requirements in the target measurement chain.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for LM2902DG4 — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | LM2902DT | LM2902DR | LM2902DRE4 | LM2902DR2G | LM2902KDR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-SOIC | 14-SOIC - same | 14-SOIC - same | 14-SOIC - same | 14-SOIC - same | 14-SOIC - same |
| Amplifier Type | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose |
| Number of Circuits | 4 | 4 | 4 | 4 | 4 | 4 |
| Gain-Bandwidth Product | 1.2 MHz | 1.2 MHz | 1.2 MHz | 1.2 MHz | 1.2 MHz | 1.2 MHz |
| Slew Rate | 0.5 V/µs | 0.5 V/µs | 0.5 V/µs | 0.5 V/µs | 0.5 V/µs | 0.5 V/µs |
| Input Offset Voltage | 2 mV | 2 mV | 2 mV | 2 mV | 2 mV | 2 mV |
| Maximum Single-Supply Voltage | 26 V | 26 V | 26 V | 26 V | 26 V | 26 V |
| Typical Supply-Current Drain | 0.8 mA | 0.8 mA | 0.8 mA | 0.8 mA | 0.8 mA | 0.8 mA |
| Special Features | Automotive and industrial control applications | Automotive and industrial control applications | Automotive and industrial control applications | Automotive and industrial control applications | Automotive and industrial control applications | Automotive and industrial control applications |
Pangunahing mga Pagkakaiba
- Four general-purpose amplifier channels in one package (kumpara saLM2902DT)
- Broad single-supply operating capability (kumpara saLM2902DR)
- Matched bandwidth and slew performance across the replacement set (kumpara saLM2902KDR)
Talaan ng Disenyo
Place the supply-bypass capacitor as close as practical to the LM2902DG4 supply pins, and connect it with a short, low-inductance return path to the ground plane. Because the device contains four amplifier sections, each feedback loop should remain local to its own channel rather than sharing long routes with neighboring signals. Check the manufacturer pin-description table before assigning PCB nets because incorrect input or output connections can create positive feedback even when the component is installed correctly.
Do not treat the 1.2 MHz gain-bandwidth product as usable closed-loop bandwidth at every gain setting. Noise gain, feedback-network impedance, load capacitance, and the selected operating frequency jointly determine stability and bandwidth. Start with the manufacturer's recommended feedback topology, keep the noise gain within the range supported by the compensation, and verify the final circuit with the actual source impedance and load rather than relying on an ideal simulation.
Check input common-mode range and output swing against the selected supply voltage before using LM2902DG4 near a supply rail. The device is not identified as rail-to-rail, so input signals and output excursions must remain within the manufacturer-defined operating ranges. Also compare the required waveform transition with the 0.5 V/µs slew rate; otherwise the amplifier can introduce slew distortion even when its small-signal gain-bandwidth product appears adequate.
Impormasyon ng Pagsunod sa Kautusan
The available product information does not establish RoHS, REACH, lead-free, halogen-free, or conflict-minerals status for the LM2902DG4 ordering code. LM2902-family material mentions automotive and industrial applications, but the LM2902DG4 ordering option is not identified as AEC-Q100 qualified.