LM2904M - Dual 26V 700kHz Op Amp | Texas Instruments
MPN： LM2904M ✓ 啟用中LM2904M 概覽
An operational amplifier is an analog integrated circuit that uses feedback to amplify the difference between its non-inverting and inverting inputs. The LM2904M belongs to the broader operational-amplifier, analog-amplifier, and semiconductor hierarchies. In practical circuits, each internal amplifier can serve as an inverting amplifier, non-inverting amplifier, comparator, buffer, or integrator when operated with suitable external components and supply voltages.
The 26 V supply rating provides compatibility with conventional industrial and analog signal ranges, while the 700 kHz gain-bandwidth product supports low-to-moderate-frequency signal amplification. The dual configuration reduces package count when a circuit needs two amplifier channels. Its general-purpose designation indicates broad applicability rather than a specialized low-noise, high-speed, precision, or automotive-only function.
The LM2904M uses an 8-SOIC surface-mount package, corresponding to the soic-8 package library key. The verified results do not provide a complete electrical specification table in the supplied excerpts, so detailed parameters such as input offset voltage, input bias current, slew rate, output-current capability, common-mode range, quiescent current, and noise values are marked as data needed rather than estimated.
Typical applications include low-frequency analog signal conditioning, instrumentation interfaces, sensor buffers, audio preamplifier stages, and general dual-amplifier circuits. The dual channel can also be used for active filtering or control loops where two matched functional amplifier sections are useful. Because the available information is general-purpose and distributor-oriented, the designer should verify operating-point limits, loading, stability, and temperature margin against the manufacturer datasheet before release.
For PCB implementation, place bypass capacitors close to the supply pins and route sensitive input and feedback traces away from switching nodes and high-current paths. Confirm the exact pin orientation and electrical limits before assembly. This page combines verified manufacturer and distributor references with explicitly marked data gaps rather than inventing missing specifications.
直接替換替代品，適用於 LM2904M — 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： LM2904M （相同外形與佔位） — 差異在於 Package, Amplifier Type, Number of Channels, Operating Temperature Range, RoHS Status.
LM2904M/NOPB
✅ 直接替換📋 參考替代品（不在目錄中）
KA2904
✅ 直接替換📋 參考替代品（不在目錄中）
LM2904M 最大額定值與電氣特性
| Product Type | Dual general-purpose operational amplifier |
| Number of Amplifier Channels | 2 circuits |
| Supply Voltage Rating | 26 V |
| Gain-Bandwidth Product | 700 kHz |
| 封裝 | 8-SOIC |
| 工作溫度範圍 | -40 °C to 85 °C |
| 安裝類型 | Surface mount |
| RoHS 狀態 | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
LM2904M 8-soic 腳位配置指南
LM2904M（8-soic 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： LM2904M.
請參閱 資料表 以查看完整腳位配置。
典型應用
LM2904M 適用於 6 應用s: Low-Frequency Sensor Signal Conditioning, Audio Preamplifier, Active Filter and Filter Buffer, Instrumentation Interface, Industrial Control Signal Conditioning, General Analog Buffering.
Low-Frequency Sensor Signal Conditioning
The LM2904M is suitable for conditioning low-frequency sensor signals when the circuit does not require the very low offset, noise, and bias-current performance of a precision amplifier. Its two channels can be assigned to separate stages, such as an amplifier followed by a buffer or an active-filter section. The verified 700 kHz gain-bandwidth product is appropriate for many low-frequency industrial signals, while the 26 V rating supports conventional analog supply planning. Before committing, verify input bias current for high-impedance sensors, common-mode limits, output swing, and the required signal bandwidth.
推薦
Audio Preamplifier
The LM2904M can support general audio preamplifier and buffering functions when the desired gain and bandwidth remain within the device’s operating limits. A dual package allows one channel to provide voltage gain and the other to buffer or implement a second gain stage. Its 700 kHz gain-bandwidth product covers many audio-band applications, but the designer should check slew rate, output swing, noise, load capability, and supply voltage in the manufacturer datasheet. Decoupling and grounding are especially important when the amplifier follows a high-gain stage.
推薦
Active Filter and Filter Buffer
The dual LM2904M is useful for active-filter and buffering circuits where two amplifier channels can simplify the signal path. One channel may implement a first- or second-order active-filter section while the other isolates the next stage or provides gain. The 700 kHz gain-bandwidth product gives useful bandwidth for many low- and mid-frequency filter designs, while the 26 V rating provides supply flexibility. Exact resistor, capacitor, noise, stability, and common-mode selections must be calculated using the verified electrical characteristics.
推薦
Instrumentation Interface
LM2904M can be used in instrumentation interfaces for low-frequency differential or single-ended signal paths where general-purpose performance is sufficient. The two amplifier sections can form a differential stage, an input buffer plus gain stage, or a gain-and-buffer combination. Its dual 26 V and 700 kHz family positioning supports many industrial control and measurement circuits, but high-impedance sources may require careful assessment of bias current and offset. Verify the actual input range and output drive before selecting the supply rails.
推薦
Industrial Control Signal Conditioning
The LM2904M is applicable to industrial control signal-conditioning circuits that operate at low or moderate frequencies and need two general-purpose amplifier channels. It can condition control feedback signals, buffer sensor outputs, or amplify a low-level command before an actuator interface. The 26 V rating is useful for systems with wider analog rails, but the exact common-mode range and output swing must be confirmed for the chosen operating point. Robust grounding, supply bypass capacitors, and protection against transients remain necessary for industrial boards.
推薦
General Analog Buffering
The LM2904M can function as a general analog buffer or unity-gain stage for low- to moderate-bandwidth signals. Buffering can reduce source-loading effects when driving a following circuit, and the second channel may handle an independent signal path. The 700 kHz gain-bandwidth product should be checked against the required closed-loop bandwidth and stability margins. The verified data does not specify unity-gain bandwidth, output-current capability, or slew rate, so the final selection must be based on the complete manufacturer datasheet.
推薦
推薦產品摘要
工程參考資料，適用於 LM2904M — 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 | LM2904M/NOPB | KA2904 | LM2904D |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | onsemi | Texas Instruments |
主要差異化特點
- Two amplifier channels in one package (對比KA2904)
- 26 V family supply rating (對比LM2904M/NOPB)
- 700 kHz gain-bandwidth positioning (對比LM2904D)
設計說明
The verified LM2904 family information gives a 26 V rating but does not provide the complete supply-current or thermal limits in the supplied excerpts. Before applying power, confirm the minimum and maximum supply voltage, input common-mode range, output swing, quiescent current, and package thermal limits from the manufacturer datasheet. Place supply bypass capacitors close to the amplifier supply pins and keep the return path short to reduce supply noise and ground bounce.
Use the manufacturer 8-SOIC land pattern and confirm pin 1 orientation before routing. Keep non-inverting and inverting inputs, feedback components, and high-impedance nodes short and away from switching inductors, motor traces, and digital clock lines. A solid ground plane helps return currents, but sensitive analog traces should still be routed over a continuous, low-impedance ground reference.
Do not substitute an LM2904-family part based only on its name or apparent pin compatibility. The verified excerpts do not provide a complete pinout, electrical limit table, or quantified cross-reference matrix. Before replacing LM2904M, compare supply voltage, input common-mode range, offset voltage, bias current, gain-bandwidth behavior, slew rate, output swing, load capability, temperature grade, and package drawing against the exact replacement datasheet.
For feedback and filter circuits, calculate closed-loop bandwidth from the verified device behavior and the selected noise-gain network rather than relying only on the 700 kHz headline gain-bandwidth value. Keep feedback components close to the relevant pins and avoid long traces around high-gain nodes. Verify stability, slew-rate limits, and output loading in the manufacturer datasheet before increasing gain or operating frequency.
合規資訊
The supplied verified excerpts identify the distributor categories and manufacturer product page but do not provide RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive-qualification declarations for the exact LM2904M suffix. These fields remain unknown rather than inferred.
