LM2904QTH-13 - Dual 36V Automotive Op Amp | Diodes Incorporated
MPN： LM2904QTH-13 ✓ 啟用中LM2904QTH-13 概覽
An operational amplifier is a high-gain analog signal-conditioning IC that compares an input voltage with a feedback reference and drives its output to reduce the difference between them. The LM2904 dual-amplifier configuration belongs to the operational-amplifier family within analog ICs and analog signal-processing semiconductors. Its two channels may be used independently for signal conditioning, voltage comparison, feedback control, or other general-purpose analog functions.
The LM2904QTH-13 combines relatively wide supply-voltage tolerance with low quiescent current and automotive-compliant construction. A 36 V maximum supply makes it useful in systems operating from industrial or automotive batteries after appropriate transient and protection design. Its 700 kHz gain-bandwidth product is adequate for low-to-moderate-frequency signal paths, while the 0.3 V/µs slew rate affects how quickly the output can follow large voltage changes. The 40 mA output-current figure and 250 nA input-bias current define important loading and input-stage constraints.
The two amplifiers provide flexibility within one compact package, reducing component count in dual-channel circuits. Each channel has its own differential input and output pins, allowing simultaneous or independent operation. Because the device is intended for general-purpose amplification, its offset voltage, input-bias current, bandwidth, and output-drive capabilities must be checked against the target signal amplitude, source impedance, load, noise requirements, and stability conditions.
Typical applications include automotive sensor conditioning, actuator and valve-driver feedback, battery-powered instrumentation, industrial control modules, current monitoring, and low-frequency signal amplification. In battery-powered systems, the approximately 700 µA supply-current characteristic helps limit standing power when both channels are operating at low utilization. For high-impedance sensors, the 250 nA input-bias current should be compared with the sensor's effective source impedance and resulting offset error.
The main design consideration is maintaining stability with the output load and compensation network selected for the target feedback topology. Keep sensitive input traces away from power paths and output nodes, provide local supply bypassing, and account for automotive supply transients at the board interface. The TSSOP-8 outline also requires thermal analysis when both channels drive demanding loads at elevated ambient temperature.
This product page combines the manufacturer and distributor characteristics for the LM2904QTH-13 with package, replacement, application, and design guidance. It highlights practical distinctions among same-footprint alternatives and identifies the electrical details that require confirmation against the current manufacturer datasheet before production release.
直接替換替代品，適用於 LM2904QTH-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： LM2904QTH-13 （相同外形與佔位） — 差異在於 Package, Maximum Supply Voltage, Amplifier Type, Mounting Type, Number of Amplifiers.
LM2904P3
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LM2904PW
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LM2904TH-13
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
LM2904PWR
✅ 直接替換📋 參考替代品（不在目錄中）
LM2904QTH-13 最大額定值與電氣特性
| Amplifier Type | General Purpose |
| Number of Circuits | 2 circuits |
| Number of Amplifiers | 2 amplifiers |
| Maximum Supply Voltage | 36 V |
| Dual Supply Range | ±18 V |
| Gain-Bandwidth Product | 700 kHz |
| Slew Rate | 0.3 V/µs |
| Input Offset Voltage | 7 mV |
| Input Bias Current | 250 nA |
| 供應電流 | 700 µA |
| Output Current per Channel | 40 mA |
| 封裝 | 8-pin TSSOP |
| 安裝方式 | Surface Mount |
| Packaging | Tape and Reel |
| Automotive Qualification | AEC-Q100 compliant |
LM2904QTH-13 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- — Negative supply or ground connection |
| 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 | V+ — Positive supply connection |
典型應用
LM2904QTH-13 適用於 6 應用s: Automotive Sensor Signal Conditioning, Battery-Powered Industrial Instrumentation, Current Sensing and Feedback Control, Industrial Actuator Driver Interface, Low-Frequency Precision Signal Amplification, Portable Sensor Interface Module.
Automotive Sensor Signal Conditioning
The LM2904QTH-13 is appropriate for conditioning low- to moderate-frequency automotive sensor signals because it provides two independent general-purpose amplifiers, a 700 kHz gain-bandwidth product, and operation from a supply up to 36 V. Place one channel in a non-inverting or differential configuration and use the other for gain, filtering, or offset stages when additional conditioning is required. The 250 nA input-bias current and 7 mV input-offset voltage must be included in high-impedance sensor error calculations. Because this ordering code is AEC-Q100 compliant, it is better suited to automotive qualification than a generic LM2904 variant. Board-level transient protection and signal-ground layout remain necessary even with a 36 V-rated amplifier.
推薦
Battery-Powered Industrial Instrumentation
The LM2904QTH-13 fits battery-derived industrial measurement systems that need a wide operating-supply range and two amplifier channels in one 8-pin TSSOP package. Its approximately 700 µA supply current supports low standby demand, while the 36 V maximum supply provides margin for 12 V or 24 V system rails. Use the channels to amplify transducer outputs or implement active filtering before an ADC. The 700 kHz gain-bandwidth product suits slow process variables rather than high-bandwidth communications, and the 0.3 V/µs slew rate restricts fast large-signal outputs. Verify the input common-mode range at the actual supply voltage and include bias-current error when the sensor source impedance is high.
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Current Sensing and Feedback Control
The LM2904QTH-13 can amplify the output of a shunt-based current sensor and close a feedback loop in motor, actuator, or power-control circuitry. Its 700 kHz gain-bandwidth product is suitable for control loops operating well below the amplifier's unity-gain limit, while the 40 mA output-current figure provides a defined output-drive capability for moderate loads. The two channels allow one amplifier to amplify the sensed voltage and another to shape or offset the control signal. Input bias current of 250 nA produces an estimated 2.5 mV error across a 10 kΩ shunt, while the 7 mV offset must also be considered at small sensor currents. Check output swing and stability with the actual feedback network.
推薦
Industrial Actuator Driver Interface
The LM2904QTH-13 is useful in the interface between a low-level command signal and the feedback network of an industrial actuator. Its 36 V supply capability supports systems with elevated intermediate rails, and the two channels can implement command amplification and output-current or position feedback conditioning. The 0.3 V/µs slew rate is appropriate for many valve, relay, and motor-control loops operating at low or moderate frequencies. Its 40 mA per-channel output current should be checked against the feedback network and any external driver input. Because the device is AEC-Q100 compliant, it can be considered in automotive actuator designs as well, subject to the complete system qualification and automotive transient requirements.
推薦
Low-Frequency Precision Signal Amplification
The LM2904QTH-13 supports low-frequency precision amplification when the signal is filtered and the required closed-loop bandwidth remains well below the 700 kHz gain-bandwidth product. Its dual-channel arrangement can process related inputs or implement active differential and filter stages. The 7 mV input-offset voltage must be compared with the smallest signal of interest, and the 250 nA input-bias current becomes increasingly important as source impedance rises. The general-purpose topology is more appropriate for instrumentation and control signals than for applications demanding rail-to-rail input/output operation, very low offset, or micropower performance. Use the manufacturer application diagrams as a starting point, then verify noise, stability, and load behavior on the final board.
推薦
Portable Sensor Interface Module
The LM2904QTH-13 can serve as a compact dual-channel interface in a portable sensor module requiring a common amplifier family and relatively low supply current of approximately 700 µA. The TSSOP-8 package supports dense layouts, and its two amplifiers can condition inputs from two related sensors or combine sensing and buffering functions. The 36 V rating is useful when the module shares a protected automotive or industrial rail, but it does not replace an input common-mode check or rail-to-rail compatibility analysis. If the portable system operates from a single cell or a 3.3 V rail, verify the output swing and common-mode limits carefully. The amplifier should be paired with local bypassing, protected routing, and a sensor-specific gain plan that accounts for offset and bias current.
推薦
推薦產品摘要
工程參考資料，適用於 LM2904QTH-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 | LM2904P3 | LM2904PW | LM2904TH-13 | LM2904PWR | LM2904DT |
|---|---|---|---|---|---|---|
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Texas Instruments | STMicroelectronics |
| Package | TSSOP-8 | TSSOP-8 - same package | TSSOP-8 - same package | TSSOP-8 - same package | TSSOP-8 - same package | TSSOP-8 - same package |
| Amplifier Count | 2 | 2 | 2 | 2 | 2 | 2 |
主要差異化特點
- Automotive-compliant ordering option (對比LM2904P3)
- Same-footprint conversion within the LM2904 family (對比LM2904PW)
- Defined 36 V supply capability (對比LM2904DT)
- Moderate-bandwidth performance with two channels (對比LM2904PWR)
設計說明
Do not treat the 36 V supply rating as permission to apply 36 V directly to an automotive battery rail. Automotive electrical transients can exceed the steady-state operating limit. Place the appropriate reverse-battery, surge, and transient protection ahead of the LM2904QTH-13, and verify the protected rail against every minimum and maximum condition in the manufacturer datasheet.
Place the supply bypass capacitor directly between the V+ and V- pins, and route the amplifier ground return to the quiet ground plane rather than through the load-current path. The eight-pin TSSOP footprint has fine-pitch leads, so inspect solder bridges and pad-to-pad clearance after assembly. Keep the two channels physically separated where one channel handles a sensitive sensor and the other drives a larger or faster-changing output.
Account for the 250 nA input-bias current when the source impedance is high. Estimated: a 1 MΩ source creates a bias-current error of 250 mV, calculated as 250 nA multiplied by 1 MΩ. Add the 7 mV input-offset voltage and compare the resulting uncertainty with the smallest signal of interest before selecting amplifier gain.
The 700 kHz gain-bandwidth product is not the usable closed-loop bandwidth for every circuit. At a noise gain of 100, the estimated bandwidth is approximately 7 kHz, calculated as 700 kHz divided by 100. Confirm stability, output swing, and slew-rate requirements with the intended feedback network and capacitive load rather than relying only on the headline bandwidth.
合規資訊
The LM2904QTH-13 is identified as automotive compliant and AEC-Q100 compliant. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status require confirmation in the current manufacturer product documentation or declaration.