LM2902KAVQDRQ1 - Quad 30V 1.2MHz Op Amp | Texas Instruments
MPN: LM2902KAVQDRQ1 ✓ Hoạt độngLM2902KAVQDRQ1 Tóm tắt
An operational amplifier is an analog integrated circuit that amplifies the voltage difference between its non-inverting and inverting inputs. The LM2902 contains four independent, internally compensated amplifiers, allowing one package to provide feedback control, buffering, signal conditioning, or differential-to-single-ended conversion. In the power-management hierarchy, it is an analog signal-chain IC rather than a voltage regulator, although its wide supply tolerance makes it useful in industrial and automotive power systems.
The headline specifications include four amplifier circuits, a 1.2 MHz gain-bandwidth product, a 0.5 V/us slew rate, and approximately 2 mV offset voltage. The device also provides a typical common-mode rejection ratio of 80 dB and an input bias current of 20 nA. Its 30 V operating capability suits 12 V automotive systems, industrial control equipment, audio electronics, and instrumentation while allowing operation from lower single-supply voltages.
Each amplifier is frequency compensated and optimized for general-purpose analog design rather than high-speed differential signaling. A 1.2 MHz gain-bandwidth product is most useful at moderate closed-loop gains, while the 0.5 V/us slew rate limits large-signal response at low frequencies. The four independent channels can be configured independently for noninverting, inverting, comparator-like, summing, and feedback-amplifier circuits, subject to common-mode and output-swing limitations.
Typical uses include automotive sensor interfaces, battery-powered monitoring equipment, active filters, audio preamplifiers, industrial transducers, and general-purpose control loops. Four amplifiers in one SOIC-14 package reduce board area and component count when several low-frequency analog channels are required. The automotive qualification makes the LM2902-Q1 family especially suitable for body electronics, actuator interfaces, and vehicle sensing systems.
Design with the supply voltage, input common-mode range, output swing, input bias current, and capacitive-load drive in mind. Decoupling capacitors should be placed close to the supply pins, and sensitive input traces should be kept away from switching nodes. Because the gain-bandwidth and slew-rate limits are modest, verify stability with the intended feedback network and load capacitance before scaling the design into production.
This page combines manufacturer specifications, lifecycle information, application guidance, and same-footprint alternatives. It also provides practical design notes and parameter comparisons that help engineers distinguish functionally similar LM2902 variants and choose a suitable replacement without assuming that every ordering code is electrically identical.
Bộ thay thế dễ dàng lắp đặt cho LM2902KAVQDRQ1 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LM2902KAVQDRQ1 (cùng hình factor và footprint) — khác nhau ở Maximum Supply Voltage, Amplifier Type, Input Bias Current, Operating Temperature Range, RoHS Status.
LM2902KVQDRQ1
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2902KVQDRG4Q1
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2902QDRG4Q1
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2902BKVQDRQ1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM2902DR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2902DR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2902KAVQDRQ1 Tỷ lệ tối đa & tính chất điện
| Number of Amplifier Circuits | 4 circuits |
| Maximum Supply Voltage | 30 V |
| Gain-Bandwidth Product | 1.2 MHz |
| Input Offset Voltage | 2 mV |
| Slew Rate | 0.5 V/us |
| Input Bias Current | 20 nA |
| Common-Mode Rejection Ratio | 80 dB |
| Enhanced ESD Rating | 2 kV |
| Khoảng nhiệt độ hoạt động | -55 C to +125 C |
| Supply Voltage in Test Condition | 5 V |
| Amplifier Type | General-purpose operational amplifier |
| Số lượng chân | 14 pins |
| Package Type | SOIC-14 |
| Kiểu lắp đặt | Surface mount |
| Packaging | Tape and reel |
| Automotive Qualification | AEC-Q100 qualified |
| Trạng thái RoHS | Compliant |
| MSL | 1 - 260 C unlimited floor life |
| Product Status | Active |
Hướng dẫn cấu hình chân LM2902KAVQDRQ1 soic-14
Cấu hình chân cho LM2902KAVQDRQ1 (soic-14 gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho LM2902KAVQDRQ1.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
LM2902KAVQDRQ1 phù hợp cho 6 Áp dụngs: Automotive Sensor Signal Conditioning, Industrial Transducer Interface, Active Audio Preamp, Battery-Powered Monitoring System, Power Supply Feedback Control, Data Acquisition Front End.
Automotive Sensor Signal Conditioning
The LM2902KAVQDRQ1 fits automotive sensor interfaces that need several low-frequency amplification stages in a compact package. Its four independent channels can condition resistive, resistive-divider, or low-current sensor outputs while the 30 V maximum supply and -55 C to +125 C operating range support demanding vehicle environments. The 1.2 MHz gain-bandwidth product is appropriate for bandwidths far below the amplifier limit, and the 20 nA input bias current helps avoid loading high-impedance sources. AEC-Q100 qualification makes the LM2902-Q1 family suitable for automotive qualification programs when the exact ordering code is confirmed. Practical designs should still check the input common-mode range, output swing, sensor excitation noise, and fault margins.
Được đề xuất
Industrial Transducer Interface
The LM2902KAVQDRQ1 is useful for buffering and amplifying low-level industrial transducer signals when one board must process several analog channels. Its four internal amplifiers can implement non-inverting stages, active filters, differential-to-single-ended conversion, and output drivers without using four separate packages. A 1.2 MHz gain-bandwidth product supports moderate closed-loop gains, while the 0.5 V/us slew rate is suitable for slow sensor and control signals rather than high-speed communications. The wide 30 V supply capability simplifies interface design around 24 V industrial systems, provided each input and output remains inside the specified common-mode and swing limits. Use short feedback routes, local supply decoupling, and guarded input traces to reduce noise pickup.
Được đề xuất
Active Audio Preamp
The LM2902KAVQDRQ1 can form a low-cost four-channel audio preamplifier for line-level signals in automotive, industrial, or communication equipment. Its four independent amplifier channels support multiple stereo or mono stages, and the 1.2 MHz gain-bandwidth product provides ample response for audio-band amplification. The 0.5 V/us slew rate is comfortably above the demands of most audio signals but does not make the device appropriate for wideband video or high-frequency signal paths. The 2 mV input offset is reasonable for general audio conditioning. Designers should provide adequate output-current margin for the chosen load, check the output swing on the selected supply, and bypass the supply pins close to the package to prevent channel-to-channel modulation.
Được đề xuất
Battery-Powered Monitoring System
The LM2902KAVQDRQ1 fits battery-powered environmental and equipment monitors that require several amplification functions at modest signal bandwidth. It can combine sensor buffering, gain-stage amplification, active filtering, and a comparator-style control amplifier in one SOIC-14 package. The 20 nA input bias current is beneficial when driving high-impedance sensors, and the four-channel integration reduces both board area and component count. Because the gain-bandwidth product is 1.2 MHz and the slew rate is 0.5 V/us, the device is best suited to slow or audio-band monitoring signals. Verify the current drawn by the complete circuit, confirm that the supply remains within the allowed range, and include protection against transients when the device is connected to long external leads.
Được đề xuất
Power Supply Feedback Control
The LM2902KAVQDRQ1 can implement error amplifiers and feedback-control elements in linear or supervisory power circuits because it combines four compensated amplifiers with a 30 V maximum supply. One channel may amplify the feedback error, while remaining channels provide signal conditioning, filtering, or auxiliary control functions around a switching or linear regulator. Its 1.2 MHz bandwidth and 0.5 V/us slew rate suit compensation loops operating at moderate frequencies. The key design constraint is loop stability: select feedback and compensation components against the amplifier and load characteristics, check the output-current capability, and keep the feedback node away from switching nodes. Automotive implementations should use the correctly qualified ordering code and apply the program's component and process-change controls.
Được đề xuất
Data Acquisition Front End
The LM2902KAVQDRQ1 is applicable to the analog front end of a moderate-speed data-acquisition system requiring multiple amplifier channels. The four channels can perform instrumentation-style differential conversion, gain, filtering, and driver functions before a higher-resolution converter. Its 80 dB common-mode rejection ratio is useful when the signal is small relative to the common-mode voltage, although the application must remain within the input common-mode range. The 1.2 MHz gain-bandwidth product and 2 mV offset are suitable for many low-to-moderate-resolution systems, but they are not sufficient by themselves for precision or high-speed conversion. Keep input paths short, use matched resistors for differential networks, and decouple each supply connection close to the device.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LM2902KAVQDRQ1 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | LM2902KVQDRQ1 | LM2902KVQDRG4Q1 | LM2902QDRG4Q1 | LM2902BKVQDRQ1 | LM2902DR |
|---|---|---|---|---|---|---|
| Package | SOIC-14 | SOIC-14 - same | SOIC-14 - same | SOIC-14 - same | SOIC-14 - same | SOIC-14 - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics |
| Number of Amplifiers | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits |
Bảo phân biệt quan trọng
- Four automotive-qualified amplifiers in one package (vsLM2902DR)
- Direct same-package family review (vsLM2902KVQDRQ1)
- Extended-temperature automotive application range (vsLM2902QDRG4Q1)
- Upgraded high-voltage family alternative (vsLM2902BKVQDRQ1)
Ghi chú thiết kế
Place the supply-decoupling capacitor immediately adjacent to the positive and negative supply pins of the SOIC-14 package. Because the package contains four amplifiers, shared supply impedance can allow disturbance on one channel to appear at the outputs of another. Keep non-inverting inputs, inverting inputs, and feedback components away from switching-regulator outputs and high-current return paths. Use a continuous ground reference beneath the device and route each channel's feedback loop on the same PCB layer to minimize parasitic pickup.
Do not interpret the 30 V maximum supply rating as permission to apply 30 V across every operating condition. Verify the input common-mode range, output-voltage swing, supply-current limits, and load capability for the selected gain and frequency. The 1.2 MHz gain-bandwidth product is well above the requirements of many sensor and audio applications, but noise gain, load capacitance, and feedback-network impedance can still affect stability. Start with the manufacturer’s recommended feedback values and validate the final board with the actual source and load impedances.
Estimated power dissipation is proportional to total supply voltage times the sum of all four amplifier currents plus quiescent current. With a 30 V maximum-supply design, a 1 mA total load would dissipate about 30 mW before layout losses; with a 10 mA total load, the estimate rises to about 300 mW. These calculations are estimates using the stated current assumptions, not maximum-power ratings. Check the SOIC-14 thermal resistance, copper area, ambient temperature, and automotive temperature-rise requirements at the highest expected load.
For high-impedance sensors, keep input leakage current and board contamination in mind because the specified input bias current is approximately 20 nA. Use protective resistors, guard traces, and clean board surfaces where necessary. The 80 dB common-mode rejection ratio helps reject common-mode noise, but it cannot correct a design that exceeds the input common-mode range or places sensitive nodes next to switching circuitry. Verify offset and bias errors against the sensor’s smallest meaningful signal before setting the closed-loop gain.
Thông tin tuân thủ
Texas Instruments states that the LM2902-Q1 family is qualified for automotive use in accordance with AEC-Q100 specifications. RoHS compliance is identified for LM2902KAVQDRQ1. REACH, lead-free, halogen-free, and conflict-minerals status were not established explicitly.
