LM2902AT14-13 - Quad 1.3MHz Op Amp | Diodes Incorporated
MPN: LM2902AT14-13 ✓ פעילLM2902AT14-13 סקירה
An operational amplifier, commonly called an op amp, is a high-gain differential amplifier used to amplify, filter, buffer, compare, or control analog signals. The LM2902 family belongs to the broader voltage-amplifier and analog-signal-processing hierarchy. It is intended for general-purpose designs rather than precision or high-speed signal chains, making it useful for transducers, sensor interfaces, audio paths, and control systems where economy, low power, and functional integration are priorities.
The quad configuration provides four amplifiers in one package, reducing board area compared with four separate single or dual amplifier packages. The 1.3 MHz gain-bandwidth product supports applications requiring moderate rather than very high closed-loop bandwidth. Its 100 dB open-loop gain provides substantial correction capability, while the 375 uA operating current per channel supports low-power analog systems. Operating from a single supply is useful when negative supply rails are unavailable or undesirable.
The LM2902 uses a conventional general-purpose amplifier architecture intended for moderate accuracy and broad operating conditions. Because the four channels share one package, their supply, ground, and thermal environments are closely related. Designers should preserve adequate stability around each amplifier, account for input common-mode range and output swing, and avoid relying on rail-to-rail input or output operation. The 1.3 MHz bandwidth also makes stability and noise considerations more important than in precision, low-offset alternatives.
Typical uses include four-channel sensor conditioning, low-frequency active filtering, audio preamplification, comparator-style threshold circuits, current-to-voltage conversion, and general industrial control. The package is particularly useful when several low-frequency analog channels must be consolidated on a compact board. Its automotive temperature grade makes it relevant to vehicle electronics, provided each electrical limit is evaluated against the complete operating environment.
A primary design consideration is the voltage-loss margin required by a non-rail-to-rail amplifier. Input and output voltage ranges must be checked against the actual supply voltage and signal amplitude. Decoupling should be placed close to the supply pins, the unused amplifier channel should be configured according to the manufacturer's recommendations, and PCB grounding should minimize voltage-drop and feedback coupling between sensitive channels.
This product record combines the LM2902AT14-13 specifications with package guidance, application-oriented design notes, and a strict compatibility review. It helps engineers determine whether the quad TSSOP implementation fits a power-conscious analog design before committing to a board layout or production release.
חלופות תחליף ישיר עבור LM2902AT14-13 — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
אין חלופות תואמות Drop-in עבור מוצר זה.
בקשת חלופותLM2902AT14-13 דירוגים מרביים ומאפיינים חשמליים
| Amplifier Type | General-purpose operational amplifier |
| Number of Amplifier Channels | 4 channels |
| Gain-Bandwidth Product | 1.3 MHz |
| Open-Loop Gain | 100 dB |
| זרם אספקה | 375 uA |
| מארז | 14-pin TSSOP |
| Terminal Form | Gull wing |
| סוג הרכבה | Surface mount |
| Temperature Grade | Automotive |
מדריך תצורת פינים של LM2902AT14-13 14-pin tssop
תצורת פינים עבור LM2902AT14-13 (מארזת 14-pin tssop). רכיב הספק זה כולל מסופי שער, ניקוז ומקור. במארזים לא מקוטבים, יש לעיין בגיליון הנתונים של היצרן לכיוון מדויק של פין 1 ולפרטי טביעת רגל. יישומים נפוצים כוללים תכנון ספקי כוח, הנעת מנועים והחלפת עומסים.
אין נתוני פריסת פינים מפורטים עבור LM2902AT14-13.
עיינו ב- גיליון נתונים עבור תצורת פינים מלאה.
יישומים טיפוסיים
LM2902AT14-13 מתאים עבור 6 יישוםs: Industrial Sensor Signal Conditioning, Low-Frequency Active Filters, Audio Preamplifier Stages, Battery-Powered Instrumentation, Automotive Control Interfaces, Threshold Detection and Control.
Industrial Sensor Signal Conditioning
The LM2902AT14-13 is useful when an industrial control board must amplify several low-frequency sensor outputs without allocating a separate package to every channel. Its four general-purpose amplifiers can form non-inverting, inverting, or differential stages, subject to the input common-mode and output-swing limits. The 1.3 MHz gain-bandwidth product is appropriate for temperature, pressure, position, and slow process-variable signals rather than high-bandwidth sensing. At 375 uA per amplifier, the quad device also provides an efficient consolidation point. Keep sensor returns close to the amplifier ground reference and verify that each channel remains inside the common-mode range at worst-case supply voltage and signal level.
Low-Frequency Active Filters
Each of the four LM2902AT14-13 amplifier channels can implement a first-order active low-pass or high-pass stage in a multi-channel filtering network. The 1.3 MHz gain-bandwidth product leaves useful bandwidth for filters centered well below that value, while 100 dB open-loop gain supports accurate closed-loop gain at moderate frequencies. Four filters can be placed in one 14-pin TSSOP, reducing package count compared with separate dual amplifiers. Component tolerances and the amplifier’s finite gain-bandwidth response can set the actual filter accuracy, so evaluate stability, noise, and output-drive requirements across the intended frequency range before production release.
Audio Preamplifier Stages
The LM2902AT14-13 can provide four gain stages for low-frequency audio preamplification, microphone conditioning, or line-level buffering in compact analog equipment. Its 375 uA operating current per channel suits battery-powered audio products, while the four-channel integration simplifies common supply routing. The 1.3 MHz gain-bandwidth product is adequate for many voice-band and general audio paths, but it is not intended for wideband audio, ultra-low distortion, or precision low-noise designs. Check input bias current, output swing, channel matching, and common-mode behavior against the microphone level and supply voltage to prevent clipping or unintended loading.
Battery-Powered Instrumentation
For portable instrumentation powered from a single battery-derived rail, the LM2902AT14-13 combines four amplifier channels with 375 uA operating current per amplifier. This allows a compact measurement circuit to amplify, filter, or compare multiple low-frequency channels while limiting supply demand. The non-rail-to-rail architecture requires careful signal-range planning, especially when the source voltage approaches the supply rail. Confirm the valid input common-mode range, output swing, and load capability over the full battery-discharge cycle. Use local supply bypassing and maintain a low-impedance ground return to reduce supply noise and channel-to-channel coupling.
Automotive Control Interfaces
The LM2902AT14-13 is identified as an automotive-temperature-grade device and can suit low-frequency vehicle interfaces, actuator conditioning, and diagnostic signal processing when its electrical limits satisfy the system requirement. Four channels in a 14-pin TSSOP reduce the number of analog packages on space-constrained controller boards. Automotive use still requires verification of the exact temperature range, AEC-Q100 status, ESD behavior, vibration environment, and supplier change-control commitments. Provide local decoupling, maintain conservative signal headroom, and route high-current or switching nodes away from sensitive amplifier inputs to prevent coupled noise.
Threshold Detection and Control
A pair of LM2902AT14-13 channels can compare a sensor voltage with a reference, and the other two channels can amplify the related control signal or provide an output stage. The 100 dB open-loop gain supports comparator-style behavior around the selected threshold, although the part remains a general-purpose operational amplifier rather than a dedicated comparator. The 1.3 MHz bandwidth gives adequate response for slow feedback control and process-limit detection. Account for input offset voltage, reference accuracy, output saturation, and noise around the threshold. Configure the output for the voltage range and load presented by the downstream control input.
נתוני עזר הנדסיים עבור LM2902AT14-13 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה |
|---|---|
| Brand | Diodes Incorporated |
| Package | 14-pin TSSOP |
| Amplifier Channels | 4 channels |
| Amplifier Type | General-purpose operational amplifier |
| Gain-Bandwidth Product | 1.3 MHz |
| Open-Loop Gain | 100 dB |
| Supply Current | 375 uA |
| Automotive Temperature Grade | Automotive |
מבדילים עיקריים
- Four general-purpose amplifier channels in one package (לעומתLM2902DR)
- Automotive temperature-grade ordering option (לעומתLM2902DR)
- Low operating current supports four-channel analog consolidation (לעומתLM2902DR)
הערות תכנון
Plan the supply network around four channels operating from the same rail. The listed 375 uA figure applies to the amplifier channels, so verify the complete package current, output-stage contribution, temperature coefficient, and any external-load demand in the worst operating condition. Place the supply bypass capacitor close to the package power pin and keep the return path short. Also check whether startup current, output charging, and input clamping devices add transient demand that the steady-state calculation does not capture.
Treat the four channels as separate analog paths while recognizing that they share one package and ground reference. Keep high-impedance inputs short, use a continuous ground plane where practical, and route outputs away from adjacent input pins to reduce capacitive feedthrough. A protective ground connection near the device can help control ground potential differences, but follow the manufacturer’s pin and layout guidance. For low-level sensor interfaces, keep external resistor networks and sensitive traces physically separated from switching-node and motor-drive currents.
Do not assume rail-to-rail input or output behavior. Verify the input common-mode range and output swing in the Diodes Incorporated LM2902 datasheet for the selected supply voltage, then test the largest expected signal excursion. Also avoid using the 100 dB open-loop gain as a guaranteed closed-loop accuracy figure; offset voltage, bias current, noise, load, and frequency determine real circuit performance. Any unused channel should be configured according to the manufacturer’s recommendations rather than left floating.
מידע על תאימות
The product listing identifies an automotive temperature grade, but no explicit RoHS, REACH, AEC-Q100 qualification, lead-free, halogen-free, or conflict-minerals declaration was identified.
