LM2902QS14-13 - 36V Quad Op Amp | Diodes Incorporated
料号： LM2902QS14-13 ✓ 量产中LM2902QS14-13 概述
An operational amplifier, or op amp, is a high-gain analog signal-conditioning semiconductor commonly used in amplifier, comparator, filtering, summing, and feedback-control circuits. The LM2902 architecture combines four independent amplifiers with common positive and negative power pins. Its wide supply-voltage range places it within the voltage-amplifier and analog-signal-processing hierarchy, where it bridges low-level sensor signals and higher-level control or measurement systems.
The principal advantages include four amplifiers in one 14-pin package, low 700 uA quiescent current, 20 nA typical input bias current, and 100 dB typical open-loop gain. The 36 V maximum supply rating supports automotive and industrial systems operating above conventional low-voltage logic levels. Input common-mode range and output swing are important because they determine how close the amplifier can operate to its positive or negative supply rail. Consult the manufacturer pin description and electrical characteristics before selecting external bias networks or designing for rail-to-rail behavior.
The LM2902 uses a classic general-purpose four-amplifier architecture rather than rail-to-rail input or output stages. Consequently, common-mode and output-voltage limits depend on the selected supply voltage and load. Stable operation in unity-gain configurations should be confirmed against the manufacturer stability and load-capacitance guidance. Decoupling capacitors should be placed close to the supply pins to control supply impedance and maintain predictable transient behavior.
Typical uses include automotive sensor interfaces, industrial control modules, battery-powered instrumentation, transducer amplifiers, and low-frequency active filters. The quad configuration reduces board area when four independent analog channels are required, while the high-voltage capability supports systems with a 24 V or 36 V supply architecture. The device can also implement comparators when its output behavior and saturation recovery are acceptable for the intended switching application.
For each amplifier, preserve input common-mode operation within the datasheet limits and account for output loading, input bias-current error, and noise bandwidth. Place bypass capacitors close to pins 4 and 11, maintain short feedback paths, and avoid long parallel traces that can increase coupling between channels. Verify motor-generated electrical noise, supply transients, and ground offsets before using the amplifier directly with automotive sensors.
This product page combines exact ordering information, electrical limitations, pin assignments, application guidance, and like-for-like alternatives. It also distinguishes the automotive LM2902QS14-13 from lower-voltage, different-package, or non-automotive alternatives, helping engineers determine whether a replacement preserves both the SOIC-14 footprint and the required electrical behavior.
直接替换替代料： LM2902QS14-13 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LM2902QS14-13 （相同外形与封装尺寸） ——差异在于 Package, Amplifier Type.
LM2902S14-13
✅ 直接替换联系询价
查看数据手册 →LM2902B
✅ 直接替换📋 参考替代料（不在目录中）
LM324BAIDR
✅ 直接替换联系询价
查看数据手册 →LM2902-N
✅ 直接替换📋 参考替代料（不在目录中）
LM2902QS14-13 最大额定值与电气特性
| Amplifier Count | 4 channels |
| Device Type | General-purpose operational amplifier |
| Maximum Supply Voltage | 36 V |
| Typical Total Supply Voltage | ±18 V |
| Typical Supply Current | 700 uA |
| Typical Input Bias Current | 20 nA |
| Typical Open-Loop Gain | 100 dB |
| Unity-Gain Bandwidth | 1 MHz |
| Automotive Qualification | AEC-Q100 |
| 封装 | 14-pin SOIC |
| 安装类型 | Surface mount |
LM2902QS14-13 引脚配置
| 引脚 1 | OUT1 — Amplifier 1 output |
| 引脚 2 | IN1- — Amplifier 1 inverting input |
| 引脚 3 | IN1+ — Amplifier 1 non-inverting input |
| 引脚 4 | V- — Negative supply or ground |
| 引脚 5 | IN2+ — Amplifier 2 non-inverting input |
| 引脚 6 | IN2- — Amplifier 2 inverting input |
| 引脚 7 | OUT2 — Amplifier 2 output |
| 引脚 8 | OUT3 — Amplifier 3 output |
| 引脚 9 | IN3- — Amplifier 3 inverting input |
| 引脚 10 | IN3+ — Amplifier 3 non-inverting input |
| 引脚 11 | V- — Negative supply or ground |
| 引脚 12 | IN4+ — Amplifier 4 non-inverting input |
| 引脚 13 | IN4- — Amplifier 4 inverting input |
| 引脚 14 | OUT4 — Amplifier 4 output |
典型应用
LM2902QS14-13 适用于 6 应用s: Automotive Sensor Signal Conditioning, Industrial Transducer Amplification, Battery-Powered Instrumentation, Active Filtering and Analog Control, Power-Supply Feedback and Monitoring, Low-Frequency Communication Interfaces.
Automotive Sensor Signal Conditioning
The LM2902QS14-13 is suitable for conditioning low-level signals from automotive sensors because it combines four general-purpose amplifiers, a maximum 36 V supply, and AEC-Q100 qualification in one 14-pin SOIC package. Place each amplifier around the sensor-to-ECU signal path and use stable feedback networks for gain or filtering. Its 20 nA typical input bias current limits error with high-impedance sensors, while the 700 uA typical package quiescent current helps control standby demand. Design the input network so sensor and feedback voltages remain inside the manufacturer's common-mode limits, and provide local supply bypass capacitors at pins 4 and 11.
推荐
Industrial Transducer Amplification
The LM2902QS14-13 can amplify bridge, strain-gauge, or resistive-sensor signals in industrial control equipment using its four independent channels and 36 V maximum supply rating. Configure two channels for instrumentation amplification and use the remaining channels for gain, filtering, or buffer functions when system noise requirements permit. The 100 dB typical open-loop gain supports high closed-loop accuracy in moderate-frequency measurement paths, while the 1 MHz unity-gain bandwidth supports signals well above conventional industrial-control frequencies. Keep high-impedance inputs short, provide stable reference elements, and verify common-mode headroom under worst-case sensor excitation and supply tolerance.
推荐
Battery-Powered Instrumentation
The LM2902QS14-13 fits portable instrumentation that requires several analog channels without adding a separate amplifier for every measurement. Its 700 uA typical quiescent current limits the package's static supply demand, and the four amplifiers can share one bypass network to simplify PCB routing. Use the channels for sensor buffers, active filters, programmable-gain stages, or error amplifiers in a compact measurement module. Because the LM2902 is not rail-to-rail, verify the usable output swing at the selected supply voltage and use a suitable reference point for inputs that can approach either rail.
推荐
Active Filtering and Analog Control
The four channels in the LM2902QS14-13 can implement active low-pass filters, integrators, summing amplifiers, and error amplifiers in industrial and automotive control modules. Its 1 MHz unity-gain bandwidth is suitable for many low- and mid-frequency feedback loops, and the 100 dB typical open-loop gain can provide useful loop gain before compensation. Build each stage with conservative feedback-component tolerances and avoid loading amplifier outputs excessively. When operating near the negative supply or in a comparator-like configuration, account for output saturation recovery and ensure that the logic thresholds remain compatible with downstream digital inputs.
推荐
Power-Supply Feedback and Monitoring
The LM2902QS14-13 can monitor and control intermediate voltages in high-voltage industrial or automotive power systems because it accepts a supply rating up to 36 V while retaining four available channels. One channel may amplify a scaled feedback signal, another may compare it through an external threshold arrangement, and remaining channels can support load-share or fault monitoring functions. Keep the actual input common-mode voltage within the amplifier's specified range and account for the ground reference of the monitored rail. Local supply bypassing and careful separation between high-current switching paths and precision feedback nodes are essential for stable measurements.
推荐
Low-Frequency Communication Interfaces
The LM2902QS14-13 can provide receiver gain, level shifting, filtering, and impedance buffering in low-frequency communications equipment. Its four-amplifier arrangement allows several small-signal paths to share a package, while the wide supply range supports interfaces operating above conventional 5 V logic levels. Use an amplifier as a receive buffer when the source impedance would otherwise load the line, or configure feedback filters for bandwidth limiting and noise reduction. Confirm that the input and output ranges remain valid for the communication standard's logic levels, and observe the manufacturer's guidance on capacitive loading and stability.
推荐
推荐产品汇总
工程参考数据： LM2902QS14-13 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LM2902S14-13 | LM2902B | LM324B | LM2902-N |
|---|---|---|---|---|---|
| Brand | Diodes Incorporated | Diodes Incorporated | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC |
| Amplifier Count | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels |
关键差异点
- Automotive qualification within the SOIC-14 LM2902 family （对比 LM2902S14-13)
- Four integrated amplifiers in one package （对比 LM2902-N)
- High-voltage general-purpose operation （对比 LM324B)
设计说明
Place the supply bypass capacitors immediately adjacent to pins 4 and 11, with short return paths to the device ground pins. Keep amplifier input and feedback traces compact, particularly for high-impedance sensor interfaces. Route each channel's input and output away from neighboring channels and from high-current motor or switching nodes. The four-channel SOIC-14 footprint allows each amplifier to be placed close to its source and load, which reduces trace length and improves transient behavior.
Do not assume rail-to-rail input or output behavior. Verify the actual sensor voltage, feedback node, and required output level against the Diodes Incorporated common-mode and output-swing limits at the minimum and maximum supply conditions. Also check output behavior during saturation and comparator-style operation, especially when the amplifier drives a digital input. A circuit that works at 18 V can fail at a lower rail even when its absolute signal amplitudes remain unchanged.
For sensor interfaces, use the 20 nA typical input bias current as the basis for an initial source-resistance error estimate, but use maximum bias current for a production error budget. High-value feedback resistors increase bias-current error and thermal noise, while long PCB traces add leakage and capacitive pickup. Guard sensitive nodes where appropriate and keep the sensor return close to the amplifier ground reference to prevent common-mode and ground-potential errors.
合规信息
The product is identified as automotive compliant and AEC-Q100 qualified. No separate RoHS, REACH, lead-free, halogen-free, or conflict-minerals statement was identified, so those fields remain unknown.