LM2904DRE4 - Dual 700kHz Op Amp | Texas Instruments
料号： LM2904DRE4 ✓ 量产中LM2904DRE4 概述
An operational amplifier is an analog signal-conditioning integrated circuit whose differential input and high open-loop gain allow it to amplify, buffer, filter, compare, or drive external circuits. The LM2904 belongs to the operational-amplifier hierarchy within amplifier ICs and power-semiconductor devices. Its two channels can amplify different signals in one package while sharing common supply pins, making it useful where board area and external component count are important.
The 700 kHz gain-bandwidth product is the principal dynamic parameter identified for the LM2904 family. It determines the useful bandwidth for closed-loop amplifier configurations and affects how quickly the output can respond to input-voltage changes. The manufacturer lists a slew rate of 0.3 V/us for the LM2904DRE4, another indication that the device is optimized for general-purpose analog signal processing rather than high-speed data acquisition.
The LM2904DRE4 is specified for operation with a maximum total supply voltage of 26 V. This allows use in conventional 5 V, 12 V, and 24 V industrial systems when the absolute maximum voltage and common-mode operating limits are respected. Its supply-current drain is characterized as low and independent of supply voltage, while the common-mode input range includes ground, which is important in single-supply sensor and control circuits.
Typical applications include low-cost sensor conditioning, audio preamplification, general-purpose filtering, comparators with suitable output pull-up arrangements, and two-channel industrial control. The dual-channel format is especially useful for portable instruments, sensor interfaces, audio boards, and educational electronics where one package provides two independent amplifier sections.
Design with the LM2904DRE4 using the pin-description table and recommended operating conditions in the manufacturer datasheet. Pay particular attention to input common-mode voltage, output swing, supply polarity, input bias current, and stability requirements. Decoupling capacitors should be placed close to the supply pins, and sensitive analog inputs should be routed away from switching nodes and high-current return paths.
This product page combines the manufacturer’s core electrical ratings with practical application guidance, package information, and a same-package replacement comparison. It also distinguishes the standard dual LM2904 ordering options from automotive, revised, and cross-brand equivalents, helping engineers assess footprint compatibility before committing to a PCB substitution.
直接替换替代料： LM2904DRE4 ——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： LM2904DRE4 （相同外形与封装尺寸） ——差异在于 Number of Channels, Package, Slew Rate.
LM2904DG4
✅ 直接替换联系询价
查看数据手册 →LM2904AVQDR
✅ 直接替换📋 参考替代料（不在目录中）
LM2904BIDR
✅ 直接替换联系询价
查看数据手册 →LM2904BA
✅ 直接替换📋 参考替代料（不在目录中）
LM2904DRE4 最大额定值与电气特性
| Amplifier Type | General-purpose operational amplifier |
| Number of Channels | 2 channels |
| Maximum Supply Voltage | 26 V |
| Gain-Bandwidth Product | 700 kHz |
| Slew Rate | 0.3 V/us |
| Supply-Current Drain | 0.7 mA typical |
| Supply Configuration | Single supply or dual supply |
| Common-Mode Input Range | Includes ground |
| 封装 | 8-SOIC, 0.154 in (3.90 mm) width |
| Packaging | Tape and reel |
| 安装类型 | Surface mount |
LM2904DRE4 引脚配置
| 引脚 1 | OUT1 — Output of amplifier channel 1 |
| 引脚 2 | IN1- — Inverting input of amplifier channel 1 |
| 引脚 3 | IN1+ — Non-inverting input of amplifier channel 1 |
| 引脚 4 | V- — Negative supply connection |
| 引脚 5 | IN2+ — Non-inverting input of amplifier channel 2 |
| 引脚 6 | IN2- — Inverting input of amplifier channel 2 |
| 引脚 7 | OUT2 — Output of amplifier channel 2 |
| 引脚 8 | V+ — Positive supply connection |
典型应用
LM2904DRE4 适用于 6 应用s: Industrial Sensor Signal Conditioning, Audio Preamplification, Portable Instrumentation, Control-System Error Amplification, Active Filtering and Buffering, Educational and Prototyping Circuits.
Industrial Sensor Signal Conditioning
The LM2904DRE4 fits two-channel industrial sensor interfaces because it combines two independent general-purpose amplifiers with a 700 kHz gain-bandwidth product and a common-mode input range that includes ground. Each channel can amplify a low-level transducer signal before conversion or comparison, while the 8-SOIC package reduces board area. Its 26 V maximum total supply rating accommodates conventional industrial supply systems. The designer should verify input offset voltage, input bias current, output swing, and common-mode limits against the sensor specification, and use local supply bypassing to maintain stable operation beside digital circuitry.
推荐
Audio Preamplification
The LM2904DRE4 is appropriate for a general-purpose stereo audio preamplifier when the required signal bandwidth fits within the 700 kHz gain-bandwidth product. Two amplifier channels are available in one 8-SOIC package, which simplifies dual-channel or balanced-signal layouts. The 0.3 V/us slew rate provides a concrete dynamic-response figure to compare against the target audio bandwidth and amplitude. Feedback resistors determine the closed-loop gain, while input and output impedances must be selected to avoid excessive loading and distortion. Confirm output-current demand, voltage swing, and noise performance for the selected gain configuration.
推荐
Portable Instrumentation
The LM2904DRE4 is useful in portable measurement and instrumentation products requiring two analog channels, modest bandwidth, and low supply-current demand. Its 0.7 mA typical supply-current drain helps control power consumption, while the 700 kHz gain-bandwidth product is suitable for many sensor, buffer, and active-filter stages rather than high-speed waveform acquisition. The common-mode range including ground supports single-supply measurements from sensors near 0 V. Choose external precision resistors, check offset and bias-current limits, and arrange the PCB so the analog pins remain away from switching converters and display interfaces.
推荐
Control-System Error Amplification
The LM2904DRE4 can implement an error amplifier, comparator, or control-loop element in industrial and embedded systems. Its 700 kHz gain-bandwidth product allows closed-loop operation over a useful control bandwidth, and the 0.3 V/us slew rate helps the output respond to error corrections. The dual configuration can serve two related control channels or combine sensing and drive functions. Because the device is a general-purpose amplifier, the loop compensation, noise margins, output saturation, and settling behavior must be evaluated in the complete control circuit rather than inferred from bandwidth alone.
推荐
Active Filtering and Buffering
The LM2904DRE4 supports first-order and higher-order active-filter stages that do not require high-speed operation, as well as buffering of moderate-bandwidth sensor signals. The 700 kHz gain-bandwidth product permits useful closed-loop bandwidth when the filter corner frequency and noise-gain profile leave adequate loop gain. Two channels allow a second-order or complementary filter section to share the same package. Select resistor and capacitor tolerances for the intended accuracy, confirm stability with the selected noise gain, and keep sensitive filter nodes compact. Output loading and capacitive loads can alter dynamic behavior, so validate the final network with the intended source and load impedances.
推荐
Educational and Prototyping Circuits
The LM2904DRE4 is a practical dual operational amplifier for educational laboratories, function generators, comparator demonstrations, and general-purpose prototyping. Students gain access to two independent amplifier channels, a clearly documented 8-SOIC pinout, and a 700 kHz gain-bandwidth product that is sufficient for many low-frequency analog exercises. The common-mode input range including ground simplifies zero-referenced demonstrations with a single supply. Breadboard or perforated-board layouts should maintain short feedback paths, connect unused inputs appropriately, and include supply bypassing. Because there are many similarly named amplifier variants, verifying the exact ordering code and pin drawing prevents accidental use of an incompatible package.
推荐
推荐产品汇总
工程参考数据： LM2904DRE4 ——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 | LM2904DG4 | LM2904AVQDR | LM2904B | LM2904BA | LM2904DT |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics |
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Number of Amplifier Channels | 2 | 2 | 2 | 2 | 2 | 2 |
关键差异点
- Two general-purpose amplifier channels in one compact package （对比 LM2904DT)
- Standard commercial ordering option alongside an automotive family member （对比 LM2904AVQDR)
- Established high-bandwidth general-purpose family position （对比 LM2904B)
设计说明
The LM2904DRE4 can operate from a single supply or split supplies, but the total voltage across V+ and V- must not exceed 26 V. Bypass the supply pins with a short, low-inductance path and include adequate bulk capacitance for the board-level load. When estimating dissipation, use P = (VIN - VOUT) x IOUT plus quiescent dissipation based on the 0.7 mA typical supply-current drain. Validate the operating point against the package thermal data rather than relying on ambient temperature alone.
Place input and feedback components close to the relevant SOIC pins so that the 700 kHz closed-loop bandwidth is not undermined by parasitic resistance or capacitance. Connect the two amplifier channels independently even though they share V+ and V-. Keep the ground return of sensitive analog signals separate from high-current switching paths where practical. A solid ground plane and short supply-decoupling connection help maintain predictable behavior in mixed-signal systems.
Do not assume that all devices labeled LM2904 are interchangeable without checking package, channel pinout, supply range, and revision. LM2904DRE4 uses an 8-SOIC footprint, and the numbering must be compared with the manufacturer pin description before PCB release. Also verify the common-mode input range for every signal excursion. The range includes ground, but this does not mean the amplifier can accept every input extending beyond the positive rail or other operating limits.
For low-frequency precision applications, evaluate input offset voltage and input bias current rather than treating the 700 kHz gain-bandwidth product as an accuracy specification. High source resistance can increase input-referred error, and capacitive loading near an output can affect stability. Use short traces, defined source and load impedances, and feedback values that keep noise gain within the amplifier’s stable operating region. The final circuit should be checked with the component tolerances and temperatures expected in production.
合规信息
The manufacturer product page and search results do not provide an explicit compliance statement for the exact LM2904DRE4 ordering code. The automotive LM2904AVQDR is positioned as an automotive alternative, but its qualification details must be confirmed on the exact manufacturer page before use in an AEC-Q100 design.
