LM2904AQS-13 - Dual 36V Automotive Op Amp | Diodes
MPN： LM2904AQS-13 ✓ 啟用中LM2904AQS-13 概覽
An operational amplifier is a high-gain, differential-input analog amplifier used in the broader hierarchy of amplifier ICs, analog signal-chain ICs, and semiconductor devices. Its differential input allows a small voltage difference to be amplified relative to a feedback-defined reference. Common uses include voltage buffers, sensor amplification, active filters, comparators, and transducer-signal conditioning. The LM2904AQS-13 combines two amplifier channels in one SO-8 package, reducing board area compared with discrete single amplifiers.
The device operates from 2 V to 36 V, tolerating a wide range of supply conditions. Its 700 kHz gain-bandwidth product supports general-purpose low-frequency signal amplification, while the listed 20 nA input bias current and 2 mV input offset voltage help define its suitability for moderate-accuracy sensing and feedback networks. The Diodes listing also identifies a 100 dB open-loop gain metric and approximately 500 uA supply-current class, which make the amplifier practical for low- and moderate-frequency industrial and automotive circuits.
The LM2904AQ family is identified by Diodes Incorporated as automotive compliant. The S suffix in LM2904AQS-13 identifies the SO-8 package option, while -13 identifies the supplier packaging format. This dual-channel configuration allows one package to implement two independent amplifier stages, reducing component count when a board requires signal buffering, differential amplification, active filtering, or two sensing channels.
Typical applications include 5 V and 12 V sensor interfaces, automotive transponder and battery-management signal conditioning, industrial process-control inputs, active low-pass filters, and general dual-amplifier boards. The wide 36 V supply capability is particularly useful where signal nodes can experience industrial transients or automotive battery-related voltages, provided the design keeps every pin within the device's absolute maximum ratings.
Design the feedback network for the intended closed-loop bandwidth, keep input and output signals within the common-mode range, and bypass the supply pins close to the package. Decoupling capacitors should be placed at the IC rather than at the power-source entry point. If the amplifier drives capacitive loads, add an isolation resistor and verify stability and output-current margin in the final board layout.
This page combines package, electrical, automotive-compliance, cross-reference, and replacement information with practical guidance for dual op-amp layouts. It helps engineers distinguish the exact automotive SO-8 device from broader LM2904 variants, package variants, and functional alternatives that may require different qualification or footprint review.
直接替換替代品，適用於 LM2904AQS-13 — 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： LM2904AQS-13 （相同外形與佔位） — 差異在於 Package, Input Offset Voltage, Number of Channels, Input Bias Current, Slew Rate.
LM2904AQ
✅ 直接替換📋 參考替代品（不在目錄中）
LM2904QDRQ1
✅ 直接替換✗ 缺貨
$0.22 / 單位
查看資料表 →LM2904DR
✅ 直接替換聯絡詢價
查看資料表 →LM2904BIDR
✅ 直接替換聯絡詢價
查看資料表 →LM2904AQS-13 最大額定值與電氣特性
| Amplifier Count | 2 amplifiers |
| Product Type | General-purpose operational amplifier |
| Supply Voltage Range | 2 V to 36 V |
| Gain-Bandwidth Product | 700 kHz |
| Input Offset Voltage | 2 mV |
| Input Bias Current | 20 nA |
| 供應電流 | 500 uA class |
| Open-Loop Gain | 100 dB |
| 封裝 | 8-pin SO |
| 安裝類型 | Surface mount |
| Automotive Compliance | Automotive compliant |
LM2904AQS-13 8-pin so 腳位配置指南
LM2904AQS-13（8-pin so 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： LM2904AQS-13.
請參閱 資料表 以查看完整腳位配置。
典型應用
LM2904AQS-13 適用於 6 應用s: Automotive Sensor Signal Conditioning, Industrial Process-Control Inputs, Active Audio and Communication Filters, Battery-Powered Monitoring Circuits, Precision-Weighted Difference Amplifier, Transducer and Bridge-Sensor Interfaces.
Automotive Sensor Signal Conditioning
The LM2904AQS-13 fits dual-channel automotive sensing circuits because it combines two amplifiers, a 2 V to 36 V supply span, and automotive-compliant family construction in an 8-pin SO package. One channel can buffer a sensor while the second provides gain or active filtering before conversion by an ADC. The 700 kHz gain-bandwidth product supports low- to moderate-bandwidth sensors, while 2 mV input offset and 20 nA input bias current help bound input-stage error. Designers should still verify the common-mode range, output swing, thermal conditions, and exact automotive qualification record for the ordered MPN.
推薦
Industrial Process-Control Inputs
The LM2904AQS-13 is suitable for conditioning industrial sensor inputs that require a wide supply range and two amplifier channels on a small footprint. A 24 V process loop can be divided into signal conditioning with resistive networks, buffered at the amplifier input, then amplified or filtered by the second channel. Its 36 V supply capability provides headroom in systems exposed to higher industrial rail voltages, while the 700 kHz gain-bandwidth product is appropriate for slow process variables. Protection components, input common-mode checks, and output-swing validation remain essential near the power rails.
推薦
Active Audio and Communication Filters
The dual LM2904AQS-13 can implement two first-order active-filter sections, a passive-to-active gain stage, or a buffer followed by an equalizer network. Its 700 kHz gain-bandwidth product leaves bandwidth for moderate audio-band filtering, while the two channels reduce component count and PCB area. Noise and distortion should be checked against the signal amplitude because general-purpose offset and bias-current specifications prioritize flexibility rather than precision. Place the feedback resistors and capacitors close to the relevant pins, and use a stable bypass capacitor at each supply connection.
推薦
Battery-Powered Monitoring Circuits
The LM2904AQS-13 can support battery monitoring and threshold-conditioning circuits where two amplifiers are useful within one package. One channel may buffer a voltage divider, while the other provides gain or drives an analog signal toward a comparator or ADC input. Its 2 V minimum supply supports low-voltage systems, and the 500 uA-class supply-current characteristic is relevant to power-sensitive designs. However, total consumption depends on the external resistor network, bias current, and operating mode, so battery-life calculations should include those losses rather than the amplifier rating alone.
推薦
Precision-Weighted Difference Amplifier
The LM2904AQS-13 can form a resistor-weighted differential amplifier when two channels and adequate common-mode headroom are available. Such a circuit cancels common-mode noise and is useful with balanced sensor outputs, bridge transducers, and differential communication interfaces. The target's 2 mV input offset rating helps define the worst-case output error after the closed-loop noise gain is applied, while its 700 kHz bandwidth supports slow differential signals. Resistor matching, bias-current-induced error, input protection, and output swing should be evaluated together to prevent practical performance from falling below the theoretical differential gain.
推薦
Transducer and Bridge-Sensor Interfaces
The LM2904AQS-13 is appropriate for low-frequency bridge and resistive-transducer interfaces where two analog channels can buffer the sensor and support gain or filtering. A 3 V, 5 V, or 12 V supply is within the device's 2 V to 36 V operating span, allowing the same amplifier family to serve multiple embedded systems. The 20 nA input-bias-current rating is especially relevant when high source resistance increases offset, while the 2 mV input-offset specification must be amplified by the selected resistor gain. Add input clamps for sensor faults and verify that the common-mode range includes the full sensor-output excursion.
推薦
推薦產品摘要
工程參考資料，適用於 LM2904AQS-13 — 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 | LM2904AQ | LM2904Q | LM2904 | LM2904B |
|---|---|---|---|---|---|
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Texas Instruments | Texas Instruments |
| Package | 8-pin SO | 8-pin SO option | 8-pin SO option | 8-pin SO option | 8-pin SO option |
| Amplifier Count | 2 amplifiers | 2 amplifiers | 2 amplifiers | 2 amplifiers | 2 amplifiers |
| Special Features | Dual general-purpose automotive-compliant amplifier | Automotive-compliant family | Automotive-compliant family | Dual 36 V operational amplifier | Upgraded functionality |
主要差異化特點
- Automotive-compliant family identification (對比LM2904B)
- Lower listed gain-bandwidth product supports a simpler general-purpose signal path (對比LM2904B)
- Dedicated 8-pin SO ordering configuration (對比LM2904)
設計說明
Place the supply-bypass capacitor directly between each power pin and the relevant ground reference, with the ground connection kept short. Route sensitive input and feedback nets away from switching nodes and high-current return paths. Because the SO-8 footprint offers limited lead spacing, place input protection and filtering components close to the pins rather than extending unprotected traces across the board.
Check the closed-loop bandwidth against the 700 kHz gain-bandwidth product. A practical non-inverting amplifier generally requires additional bandwidth margin above the intended signal frequency, while high closed-loop gain reduces available bandwidth further. For capacitive loading, insert a small isolation resistor between the amplifier output and the load, then confirm stability on the assembled board.
Do not treat the 2 V to 36 V supply rating as permission to exceed the input common-mode or output-swing limits. Verify that sensor and fault voltages remain within the amplifier's linear operating region, particularly in automotive circuits where transients can occur. Also avoid assuming that two amplifiers in one package can operate independently without accounting for shared supply current, thermal dissipation, and individual channel behavior.
Estimated: power dissipation in either channel depends on the actual supply voltage, output swing, load current, quiescent current, and the closed-loop operating state. Calculate worst-case dissipation from those values and compare it with the package thermal limits in the manufacturer datasheet. Provide adequate copper around the SO-8 package and avoid enclosing it in a thermally isolated enclosure when operating continuously at elevated ambient temperature.
合規資訊
Diodes Incorporated identifies the LM2904AQ family as automotive compliant. Separate RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals statements were not confirmed, so those fields remain unknown.
