LM2902KVQDRQ1 - 26V Quad Automotive Op Amp | Texas Instruments
MPN： LM2902KVQDRQ1 ✓ 啟用中LM2902KVQDRQ1 概覽
An operational amplifier is a high-gain, differential-input analog IC commonly used in sensor interfaces, buffer stages, error amplifiers, and low-frequency closed-loop control circuits. The LM2902-Q1 belongs to the operational-amplifier hierarchy, where quad operational amplifiers integrate four amplifiers into one IC while preserving independent signal paths. Its automotive qualification makes it suitable for electronic control units, body systems, instrumentation, and other 12 V vehicle platforms where operating-temperature robustness and supply-voltage tolerance are important.
The device combines a 1.2 MHz gain-bandwidth product with a typical slew rate of 0.5 V/µs and a common-mode rejection ratio of 80 dB. Its 2 mV input offset specification supports accurate amplification of low-level signals, while the four-channel configuration reduces package count on analog-conditioning boards. The 26 V maximum supply rating provides additional input-voltage margin in automotive systems that operate from a 12 V battery through transient and filtering networks.
Internally, each amplifier stage provides high open-loop gain and frequency compensation, allowing stable operation without an external compensation capacitor in ordinary closed-loop configurations. The amplifier can operate from a single positive supply or from split positive and negative supplies. Input bias current of approximately -0.5 µA and the stated CMRR characterize the input stage, helping engineers evaluate source-impedance matching and common-mode noise rejection before selecting external resistor networks.
Typical uses include automotive sensor interfaces, battery monitoring, active filtering, actuator-signal conditioning, instrumentation amplifiers, and general-purpose analog control loops. The four channels can independently implement gain stages, buffers, comparators using suitable feedback arrangements, or voltage followers. Its SOIC-14 format supports conventional surface-mount assembly while providing enough pins for the four conventional dual-input amplifier channels and the two supply terminals.
Design around the 26 V supply limit, maintain the required common-mode and output-voltage ranges, and account for input bias current when using high-source-impedance sensors. Decoupling capacitors should be placed close to the supply pins, and sensitive analog inputs should be routed away from switching nodes. Verify startup, shutdown, capacitive-load stability, and thermal performance in the final automotive environment rather than relying only on nominal amplifier parameters.
This page combines the exact orderable MPN, automotive-family positioning, pin-level implementation guidance, drop-in comparison data, and application-focused design guidance to support faster component evaluation and PCB-level planning.
直接替換替代品，適用於 LM2902KVQDRQ1 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LM2902KVQDRQ1 （相同外形與佔位） — 差異在於 Automotive Qualification, Package, Maximum Supply Voltage, Amplifier Type, Input Bias Current.
LM2902QDRG4Q1
✅ 直接替換聯絡詢價
查看資料表 →LM2902KAVQDRQ1
✅ 直接替換聯絡詢價
查看資料表 →LM2902QDRQ1
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LM2902KDRQ1
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LM2902KVQDRQ1 最大額定值與電氣特性
| Amplifier Count | 4 channels |
| Maximum Supply Voltage | 26 V |
| Gain-Bandwidth Product | 1.2 MHz |
| Input Offset Voltage | 2 mV |
| Common-Mode Rejection Ratio | 80 dB |
| Slew Rate | 0.5 V/µs |
| Input Bias Current | -0.5 µA |
| 工作溫度範圍 | -55 °C to +125 °C |
| Nominal Test Supply Voltage | 5 V |
| 腳位數 | 14 pins |
| 封裝 | 14-SOIC |
| 安裝類型 | Surface mount |
| Automotive Qualification | AEC-Q100 qualified |
| Operating Mode | Single supply or split supply |
| Frequency Compensation | Internal |
| Amplifier Type | General purpose |
LM2902KVQDRQ1 腳位配置
| 腳位 1 | OUT1 — Amplifier 1 output |
| 腳位 2 | IN1- — Amplifier 1 inverting input |
| 腳位 3 | IN1+ — Amplifier 1 non-inverting input |
| 腳位 4 | V+ — Positive supply voltage |
| 腳位 5 | IN2+ — Amplifier 2 non-inverting input |
| 腳位 6 | IN2- — Amplifier 2 inverting input |
| 腳位 7 | OUT2 — Amplifier 2 output |
| 腳位 8 | OUT3 — Amplifier 3 output |
| 腳位 9 | IN3- — Amplifier 3 inverting input |
| 腳位 10 | IN3+ — Amplifier 3 non-inverting input |
| 腳位 11 | V- — Negative supply voltage or ground for single-supply operation |
| 腳位 12 | IN4+ — Amplifier 4 non-inverting input |
| 腳位 13 | IN4- — Amplifier 4 inverting input |
| 腳位 14 | OUT4 — Amplifier 4 output |
典型應用
LM2902KVQDRQ1 適用於 6 應用s: Automotive Sensor Interfacing, Battery Monitoring and Protection, Active Filtering and Signal Conditioning, Industrial Control and Actuator Interfaces, Audio and Communication Amplification, Precision Current and Voltage Measurement.
Automotive Sensor Interfacing
The LM2902KVQDRQ1 fits low-frequency sensor conditioning because each of its four channels provides a 1.2 MHz gain-bandwidth product, 2 mV input offset voltage, and 80 dB CMRR. Its AEC-Q100 qualification and -55 °C to +125 °C operating range support harsh vehicle environments, while the 26 V supply rating provides margin above a nominal 12 V battery rail. Use the channels for buffer, gain, filtering, and diagnostic-signal conditioning stages, then verify input and output common-mode limits against the actual sensor output. Placing the bypass capacitor close to the supply pins helps isolate the amplifier from vehicle transients and switching noise, while keeping sensor traces away from motor and relay returns reduces common-mode pickup.
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Battery Monitoring and Protection
The LM2902KVQDRQ1 can amplify, filter, and compare signals derived from an automotive battery or industrial 12 V to 24 V supply system. Its 26 V maximum supply voltage is suited to protected rails where the nominal operating voltage remains below the absolute limit, and the 0.5 V/µs slew rate provides useful bandwidth for slow monitoring loops. Four independent amplifiers allow a complete protection chain to be implemented with fewer packages: one channel can buffer a voltage divider, another can amplify a current-sensor signal, and the remaining channels can form filtering or threshold stages. Account for input bias current when using high-impedance dividers, and confirm the common-mode range at every supply condition. Use a protective network ahead of the pins when the battery path can experience automotive transients.
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Active Filtering and Signal Conditioning
The LM2902KVQDRQ1 is appropriate for first-order and higher-order active-filter stages operating at low or moderate frequency. Its 1.2 MHz gain-bandwidth product, internally compensated architecture, and 2 mV input offset voltage support accurate gain and phase control around the intended signal band. The 80 dB CMRR helps reject common-mode disturbance when conditioning outputs from transducers or measurement front ends. Four channels can implement cascaded low-pass, high-pass, band-pass, or notch sections, although each amplifier must remain stable for the selected feedback network and load. Check resistor ratios against the amplifier's open-loop gain and output-current capability, and avoid using the generic offset specification as a substitute for a complete error budget. Keep the filter timing and feedback components away from digital and switching circuitry.
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Industrial Control and Actuator Interfaces
The four independent channels in the LM2902KVQDRQ1 simplify industrial control boards that need several low-frequency analog stages. One channel can buffer a command signal, another can amplify a feedback voltage, and the others can drive or monitor actuator-related signals within their electrical limits. The 26 V supply rating accommodates protected 12 V or 24 V control rails, and the 1.2 MHz bandwidth is adequate for many slow closed-loop and enable/disable paths. The 0.5 V/µs slew rate is more useful for low-frequency transitions than for high-speed edge shaping. Confirm output-current, output-voltage, common-mode-input, and capacitive-load limits in the final circuit. A solid ground return and compact supply decoupling are especially important when the board also contains relays, solenoids, or power transistors.
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Audio and Communication Amplification
The LM2902KVQDRQ1 can provide low-frequency amplification or buffering in audio, communications, and instrumentation systems where 1.2 MHz bandwidth is sufficient. Its four-channel organization allows independent gain stages without requiring four separate packages, and the 2 mV offset specification supports small-signal conditioning. The device is not a high-bandwidth audio line driver, so output-current, distortion, and load requirements should be checked against the actual load and signal amplitude. Use the 26 V operating capability only when the application needs it; lower supply voltages generally provide more headroom and potentially better dynamic behavior. Keep input and feedback traces short, use low-value noise-appropriate resistors, and decouple the supply pins locally. The package's 14-SOIC format also makes it practical for through-hole-compatible industrial PCB layouts.
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Precision Current and Voltage Measurement
The LM2902KVQDRQ1 can serve as the analog front end for slow voltage and current measurements when the signal bandwidth lies well below 1.2 MHz. A 2 mV input offset specification and 80 dB CMRR support low-level measurement stages, while four channels allow simultaneous conditioning of multiple sensors. Input bias current of approximately -0.5 µA must be considered with high-impedance sources because it can create an offset across the source resistance. Gain error and resistor tolerance may dominate the final accuracy, so use suitable precision resistors and calibrate the assembled system. For shunt-based current sensing, keep the Kelvin connection short and route it away from high-current switching paths. Supply decoupling should be placed near the IC, and the complete measurement chain should be checked for offset, drift, bandwidth, and common-mode limits.
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推薦產品摘要
工程參考資料，適用於 LM2902KVQDRQ1 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LM2902QDRG4Q1 | LM2902KAVQDRQ1 | LM2902QDRQ1 | LM2902KDRQ1 | LM2902DR |
|---|---|---|---|---|---|---|
| Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Amplifier Count | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels |
主要差異化特點
- Automotive qualification within a compact quad-amplifier package (對比LM2902DR)
- Exact 26 V, 1.2 MHz automotive-qualified LM2902-Q1 ordering option (對比LM2902QDRG4Q1)
- Four independent general-purpose channels in one package (對比LM2902KAVQDRQ1)
- Practical dual-source path for existing LM2902-Q1 layouts (對比LM2902QDRQ1)
設計說明
The LM2902KVQDRQ1 has a 26 V maximum supply rating, but the usable range still depends on common-mode input voltage, output swing, temperature, and output load. For single-supply operation, connect V- to ground and treat pin 11 as the supply-return reference. Place the primary bypass capacitor directly across pins 4 and 11, with its ground connection returned to the device ground pin using a short, low-impedance path. Automotive rails require upstream transient protection; the IC's supply rating is not a substitute for a protection network.
Route the four amplifier channels to avoid sharing narrow feedback traces and maintain symmetry where timing or matching matters. Keep non-inverting inputs away from supply, relay, motor, and switching-converter traces. For sensor inputs, use a guarded or grounded shield where practical and terminate unused amplifier channels according to the manufacturer's recommended stable configuration. The 14-SOIC footprint leaves ample board space for short input paths, local decoupling, and grounded guard structures around sensitive nodes.
Do not assume that a 1.2 MHz gain-bandwidth product makes the device suitable for every high-speed signal; closed-loop bandwidth, slew rate, output-current capability, and load capacitance determine practical performance. The 2 mV input offset specification and approximately -0.5 µA input bias current can create meaningful errors with high-impedance sources. Check that both input pins remain inside the common-mode range and that the output does not exceed the available output swing under the worst load and supply condition.
The LM2902KVQDRQ1 supports operation from -55 °C to +125 °C, but package heating can still reduce margin in a sealed automotive enclosure. Estimate dissipation from the actual quiescent current, load current, supply voltage, and output voltage at the hottest operating condition. Provide copper around the 14-SOIC package, avoid trapping heat between the IC and a sealed enclosure, and verify junction temperature with the manufacturer's thermal information rather than relying on ambient temperature alone.
At low frequencies the principal accuracy concerns are offset, bias current, CMRR, and resistor tolerance; at higher frequencies the 1.2 MHz bandwidth and 0.5 V/µs slew rate become important. Use small, stable feedback resistors where noise matters, avoid excessive capacitive loading directly on the output, and keep sensitive input and feedback nodes compact. If driving a downstream device with high capacitance, use an isolation resistor or buffer stage and verify stability in the final network.
合規資訊
Texas Instruments identifies the LM2902-Q1 family as qualified for automotive use in accordance with AEC-Q100 specifications. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status were not explicitly stated and are therefore recorded as unknown.