LM2902KPWE4 - Quad 1.2MHz Op Amp, 26V, 14-TSSOP | Texas Instruments
MPN: LM2902KPWE4 ✓ פעילLM2902KPWE4 סקירה
An operational amplifier is a voltage-gain building block that amplifies the difference between two input voltages. A quad device packages four amplifiers sharing one supply pin and one ground pin, which cuts board area roughly in half compared with four single amplifiers and keeps sensitive analog channels on a common reference. Quad op amps sit in the hierarchy above single and dual amplifiers and below application-specific amplifiers, and they belong to the broader class of analog signal-conditioning integrated circuits used in nearly every industrial, automotive, and instrumentation design.
Key features of the LM2902KPWE4 include a 1.2 MHz gain-bandwidth product that supports operation from DC to several hundred kHz of closed-loop bandwidth, a 26 V maximum total supply voltage for wide input swing, and improved ESD protection rated to 2 kV per the Texas Instruments LM2902K family description. The part is qualified to AEC-Q100 for automotive applications, and the E4 orderable suffix denotes the RoHS-compliant, lead-free finish. The 14-TSSOP body measures 0.173 inch (4.40 mm) wide, so the part fits the same footprint as other TI quad op amps such as the LM2902KPW.
Architecturally the LM2902K family is a classic bipolar general-purpose amplifier stage with internal biasing, designed for single or dual supply operation and for driving typical resistive and capacitive loads within the output swing limits. Because it is a general-purpose part rather than a rail-to-rail precision amplifier, design work must confirm that the input common-mode range and output swing are adequate for the signal chain in question, and that the amplifier is stable with the output load capacitance present on the board.
Typical uses include sensor signal conditioning, transducer and bridge-amplifier front ends, audio mixer sub-circuits, industrial loop-current receivers, and general instrumentation where four channels of gain are needed on a single board. Two channels can also be cross-coupled to build a higher-gain stage or an instrumentation-style front end.
One key design consideration is that a 26 V supply capability does not mean the amplifier should be operated near 26 V: supply noise, output stage distortion, and device stress all rise as the rail voltage increases. Keep the supply within the intended range and decouple close to the supply pins with a 0.1 uF ceramic plus a bulk capacitor.
This page brings together the manufacturer ordering information, drop-in replacement options in the same TSSOP-14 footprint, and applied design guidance for layout, decoupling, and stability that goes beyond the basic ordering table.
חלופות תחליף ישיר עבור LM2902KPWE4 — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
LM2902KPW
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
LM2902KQPW
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
TLV2474IPWR
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
TLV2464IPWR
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
LMV324IPWR
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
LM2902KPWE4 דירוגים מרביים ומאפיינים חשמליים
| Amplifier Type | Quad, general-purpose, single supply |
| Number of Circuits | 4 |
| Gain-Bandwidth Product | 1.2 MHz |
| Maximum Supply Voltage | 26 V |
| ESD Rating (Human Body Model) | 2 kV (LM2902K family) |
| ESD Rating (MIL-STD-883 Method 3015) | Less than 500 V |
| ESD Rating (Machine Model) | Exceeds 200 V (200 pF) |
| Automotive Qualification | AEC-Q100 qualified |
| מארז | 14-TSSOP (PW), 0.173 in (4.40 mm) width |
| סוג הרכבה | Surface Mount |
| סטטוס RoHS | RoHS-compliant finish (E4 suffix) |
| סוג פלט | Rail-to-rail output capable general-purpose stage (see datasheet) |
תצורת פינים של LM2902KPWE4
| פין 1 | OUT1 — Amplifier 1 output |
| פין 2 | IN1- — Amplifier 1 inverting input |
| פין 3 | IN1+ — Amplifier 1 non-inverting input |
| פין 4 | V+ — Positive supply voltage |
| פין 5 | IN2+ — Amplifier 2 non-inverting input |
| פין 6 | IN2- — Amplifier 2 inverting input |
| פין 7 | OUT2 — Amplifier 2 output |
| פין 8 | OUT3 — Amplifier 3 output |
| פין 9 | IN3- — Amplifier 3 inverting input |
| פין 10 | IN3+ — Amplifier 3 non-inverting input |
| פין 11 | V- — Negative supply (ground for single-supply operation) |
| פין 12 | IN4+ — Amplifier 4 non-inverting input |
| פין 13 | IN4- — Amplifier 4 inverting input |
| פין 14 | OUT4 — Amplifier 4 output |
יישומים טיפוסיים
LM2902KPWE4 מתאים עבור 6 יישוםs: Industrial Sensor Signal Conditioning, 4-20 mA Loop Receiver and Transmitter Interface, Automotive Body and Chassis Electronics, Audio Preamplifier and Mixer Sub-Circuit, Test and Measurement Instrumentation Front End, Power Supply Control and Feedback Loops.
Industrial Sensor Signal Conditioning
The LM2902KPWE4 fits four-channel industrial sensor conditioning because each amplifier in the 14-TSSOP package provides about 1.2 MHz of gain-bandwidth product with a 26 V supply ceiling, which covers the slow-to-medium frequency content of thermocouple, RTD, and resistive bridge signals. Four amplifiers on one package keep the analog section compact and let all channels share a single filtered supply rail. Configure two sections as non-inverting gain stages and two as active filters, place 100 nF bypass caps at pins 4 and 11, and check that the input common-mode range covers the transducer output plus the noise floor of your sensor.
מומלץ
4-20 mA Loop Receiver and Transmitter Interface
In a 4-20 mA process-control receiver, the LM2902KPWE4 gives you four amplifiers in one package for the differential input stage, gain stage, filter, and output buffer without moving to a higher-power amplifier. Its 26 V maximum supply rating lets the input stage sit comfortably above a 24 V loop supply with margin for transients, while 1.2 MHz of gain-bandwidth product is more than sufficient for the sub-kHz bandwidth of process signals. Keep the input pair close to the connector, guard the high-impedance nodes, and remember that the input common-mode range, not the supply limit, determines how large a loop voltage the amplifier can accept directly.
מומלץ
Automotive Body and Chassis Electronics
The LM2902KPWE4 is AEC-Q100 qualified for automotive applications, which makes its 14-TSSOP package a natural fit for body control modules, seat and door control units, and lighting sub-circuits. The 26 V maximum supply rating provides headroom above a 12 V automotive battery, and the 1.2 MHz gain-bandwidth product suits actuator drivers and sensor amplifiers rather than audio paths. Use the two unused amplifier sections conservatively, tie their non-inverting inputs to ground, and check the transient and ESD requirements of the specific vehicle platform before releasing the design, since automotive EMI environments are harsher than laboratory bench conditions.
מומלץ
Audio Preamplifier and Mixer Sub-Circuit
Four general-purpose amplifiers in the LM2902KPWE4 allow a compact line-level preamplifier to be built as two buffered inputs plus two summing/mixing stages, all sharing one package and one supply bypass network. The 1.2 MHz gain-bandwidth product is adequate for audio-band signals, and the wide supply range lets the same board work from a single 12 V rail or a split supply, avoiding a second low-noise part. Keep the gain per stage modest, because the gain-bandwidth product is shared with noise and distortion behaviour, and place the amplifier output protection network close to the driver stage to avoid driving long cables from an op amp.
מומלץ
Test and Measurement Instrumentation Front End
In bench instrumentation, the LM2902KPWE4 provides the buffer, gain, filter, and output driver channels typically required around a single analog measurement chain, while the 14-TSSOP footprint keeps the analog section away from dense digital routing. The 26 V supply capability supports probing and higher-voltage input ranges with headroom, and the 1.2 MHz gain-bandwidth product covers signals up to the mid-audio range. For instrument-grade accuracy, check the input bias current and offset figures in the datasheet against your source impedance, and add guard rings around high-impedance inputs to reduce surface leakage contamination.
מומלץ
Power Supply Control and Feedback Loops
The LM2902KPWE4 works well in the control section of an industrial power supply because four amplifiers allow error-amplifier, soft-start, current-limit, and pre-regulator functions to share one package on a supply rail that can reach 26 V. The 1.2 MHz gain-bandwidth product supports loop compensation in the tens of kilohertz, enough for many phase-shifted and voltage-mode topologies. Because this is a general-purpose amplifier rather than a dedicated controller, verify loop stability with the actual compensation network and output capacitor in simulation, and confirm the output stage drives the compensation and feedback nodes without excessive overshoot.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור LM2902KPWE4 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
Choose the LM2902KPW when the exact circuit is what matters and the lead-free E4 finish is not required; it is the closest functional match in the same 14-TSSOP footprint. Choose the TLV2474IPWR when your signal path needs much more than 1.2 MHz of bandwidth, for example line-stage filtering or wideband active filters, accepting the lower supply rail range. Choose the TLV2464IPWR or LMV324IPWR for low-voltage, low-power designs where the supply is 5 V or less and rail-to-rail behaviour is desirable.
The LM2904PW is not a substitute despite the identical TSSOP-14 body; it is a dual amplifier with different pin functions.
השוואה עם חלופות
| פרמטר | מוצר זה | LM2902KPW | LM2902KQPW | TLV2474IPWR | TLV2464IPWR | LMV324IPWR |
|---|---|---|---|---|---|---|
| Package | 14-TSSOP (PW), 0.173 in (4.40 mm) width | 14-TSSOP (PW) - same footprint | 14-TSSOP (PW) - same footprint | 14-TSSOP (PW) - same footprint | 14-TSSOP (PW) - same footprint | 14-TSSOP (PW) - same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Amplifiers | 4 | 4 | 4 | 4 | 4 | 4 |
מבדילים עיקריים
- Wide supply rating in a quad general-purpose amplifier (לעומתLMV324IPWR)
- Automotive-qualified grade in a 14-TSSOP footprint (לעומתLM2902KPW)
- Matched bandwidth class for general-purpose analog (לעומתTLV2474IPWR)
- Four amplifiers in one 4.40 mm wide package (לעומתLM2904PW)
הערות תכנון
Supply bypassing dominates noise performance for this amplifier family. Place a 100 nF ceramic capacitor directly across pins 4 and 11 with the shortest possible trace, and add a 1 uF to 10 uF bulk capacitor at the supply entry point. In a multi-amplifier design, all four sections share the same supply pins, so a single badly decoupled supply node can inject correlated noise into every channel. If the supply comes from a switching converter, filter it further before feeding this part.
Keep the analog path compact and away from switching nodes. Route the inverting feedback components (resistors and capacitors) close to pins 2, 6, 9 and 13 to minimize parasitic capacitance in the feedback loop, which can destabilize a 1.2 MHz amplifier. Provide a ground-plane area under the device and a quiet analog ground region, connecting analog and power grounds at a single point near the supply entry to avoid ground loops under high-current actuator loads.
Do not assume rail-to-rail behaviour. The input common-mode range of a general-purpose amplifier does not reach the positive rail, so signals that swing near the supply will clip the input stage even though the output stage still has headroom. Also do not leave unused amplifier sections floating: tie the non-inverting input of each unused section to ground and leave the output open. Finally, respect the 26 V absolute maximum supply rating, since automotive and industrial transients can exceed nominal rails quickly.
Estimated: with a 1.2 MHz gain-bandwidth product, a closed-loop gain of 10 gives roughly 120 kHz of small-signal bandwidth, so audio-band and low-frequency instrumentation signals pass cleanly while higher harmonics roll off quickly. If the design needs flat response to tens of kilohertz at higher gain, either lower the closed-loop gain or select a wider-bandwidth quad amplifier. Confirm stability with the actual load, since capacitive loading on a general-purpose amplifier output can add phase margin loss.
מידע על תאימות
The E4 orderable suffix identifies the RoHS-compliant, lead-free finish, and the manufacturer documentation states AEC-Q100 qualification for automotive applications along with ESD ratings below 500 V per MIL-STD-883 Method 3015 and above 200 V machine model.
