LM2904PW - Dual 700 kHz Op Amp, 26 V | Texas Instruments
MPN: LM2904PW ✓ Hoạt độngLM2904PW Tóm tắt
An operational amplifier, or op amp, is an analog integrated circuit that uses high open-loop gain to amplify the difference between two input voltages. A dual op amp combines two amplifiers in one package, allowing both channels to share a supply while remaining electrically independent. Within the broader semiconductor hierarchy, the LM2904PW belongs to the amplifier IC, operational-amplifier, analog-signal-conditioning, and integrated-circuit families. It is a widely recognized general-purpose alternative to newer precision and low-noise amplifier families when voltage range, low power, and functional simplicity matter more than low offset or rail-to-rail operation.
The principal operating characteristics include a 26 V maximum supply voltage, a 700 kHz gain-bandwidth product, two amplifier circuits, and a typical supply-current drain of 0.7 mA. The common-mode input range includes ground, allowing the device to sense input signals close to the negative supply rail. Low input-bias and input-offset parameters are identified in the device literature, although exact minimum and maximum limits are not included in the retrieved data. The LM2904PW therefore provides a practical balance of gain bandwidth, supply flexibility, and low supply-current demand.
Internally, the LM2904 uses a frequency-compensated voltage-feedback architecture. This internal compensation means each amplifier can provide stable closed-loop operation without an external frequency-compensation network when configured for typical noninverting or inverting gains. The design is intended for general-purpose analog systems rather than precision instrumentation. Its 700 kHz gain-bandwidth product is adequate for audio-frequency signal conditioning, low-rate data acquisition, sensor interfaces, and industrial control blocks, but it is substantially slower than precision, high-speed, or rail-to-rail amplifier families.
Typical uses include general-purpose signal amplification, low-frequency active filtering, current-to-voltage conversion for sensors, audio preamplification, comparator-style threshold conditioning with suitable output limits, and industrial control interfaces. The ability to operate from single or split supplies makes the part useful in systems whose signal range is referenced to ground. For battery-powered equipment, the typical 0.7 mA supply-current drain helps limit consumption, although the complete system current also depends on output current, load, amplifier configuration, and supply voltage.
Designers should verify the exact common-mode, output-swing, offset-voltage, input-bias-current, slew-rate, and temperature limits from the manufacturer datasheet before fixing operating conditions. Input and output stability depends on layout, source impedance, load, and feedback topology. Decoupling should be placed close to the supply pins, and sensitive layouts should minimize parasitic capacitance and leakage around high-impedance inputs. The 8-pin TSSOP footprint is compact but requires careful lead pitch and thermal considerations during assembly.
This product record combines the verified manufacturer identity, package, voltage, bandwidth, and power information with distributor pricing and cross-reference evidence. It also adds practical application guidance, honest substitution limits, package-level comparison data, and design notes intended to help engineers evaluate the LM2904PW beyond a raw distributor listing.
Bộ thay thế dễ dàng lắp đặt cho LM2904PW — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LM2904PW (cùng hình factor và footprint) — khác nhau ở Package.
LM2904BIDR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2904BA
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM2904LV
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM2904DT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM2904PW Tỷ lệ tối đa & tính chất điện
| Number of Amplifiers | 2 circuits |
| Product Type | Dual general-purpose operational amplifier |
| Maximum Supply Voltage | 26 V |
| Gain-Bandwidth Product | 700 kHz |
| Typical Supply Current | 0.7 mA |
| Supply-Current Independence | Independent of supply voltage |
| Supported Supply Configurations | Single supply or split supply |
| Common-Mode Input Range | Includes ground |
| Architecture | Voltage feedback, internally frequency compensated |
| Hộp | 8-TSSOP, 4.40 mm width |
| Package Length | 4.40 mm |
| Kiểu lắp đặt | Surface mount |
Cấu hình chân LM2904PW
| Chân 1 | OUTA — Channel A output |
| Chân 2 | INA- — Channel A inverting input |
| Chân 3 | INA+ — Channel A noninverting input |
| Chân 4 | V- — Negative supply connection |
| Chân 5 | INB+ — Channel B noninverting input |
| Chân 6 | INB- — Channel B inverting input |
| Chân 7 | OUTB — Channel B output |
| Chân 8 | V+ — Positive supply connection |
Ứng dụng tiêu biểu
LM2904PW phù hợp cho 6 Áp dụngs: Industrial Sensor Signal Conditioning, Audio Preamplification, Active Filtering, Current-to-Voltage Conversion, Power Supply Monitoring and Control, Data Acquisition Interface.
Industrial Sensor Signal Conditioning
The LM2904PW fits industrial sensor-conditioning circuits that need two channels, a 700 kHz gain-bandwidth product, and operation from a single or split supply. Each internally compensated amplifier can buffer a low-bandwidth sensor signal and apply gain before conversion or control, while the common-mode input range that includes ground supports measurements referenced near the lower supply rail. Its 0.7 mA typical supply-current drain also makes it suitable for distributed or low-power acquisition nodes when the source impedance is not high enough to expose input-bias errors. Designers should verify output swing, common-mode limits, input offset, and source impedance at the actual 5 V or higher supply, because the retrieved data does not provide all four limits.
Được đề xuất
Audio Preamplification
The dual LM2904PW can provide left and right audio preamplifier channels in an 8-TSSOP package. Its 700 kHz gain-bandwidth product is sufficient for many audio-frequency signal paths, and the two internally frequency-compensated amplifiers reduce the external component count compared with two separate single amplifiers. The common-mode input range includes ground, which is useful for microphone or line-level signals referenced to the negative rail in a single-supply system. Output swing and distortion under the selected gain and load must be checked in the manufacturer datasheet. For low-noise, very-low-distortion, or rail-to-rail headphone outputs, a dedicated audio amplifier family may be a better choice.
Được đề xuất
Active Filtering
The LM2904PW is suitable for first-order or modest higher-order active-filter stages operating well below its 700 kHz gain-bandwidth product. Two amplifier channels in one 8-TSSOP allow implementation of dual filters, anti-alias stages, or signal-conditioning channels with fewer packages than discrete single op amps. Internal frequency compensation simplifies standard inverting and noninverting configurations, while single- or split-supply operation supports both grounded and offset signals. Component tolerances and finite gain will set the practical filter accuracy, so the application should be simulated across supply, load, and temperature tolerances. The retrieved information does not specify exact slew rate or output-current limits, which must be confirmed for aggressive capacitive loads or wide dynamic-range signals.
Được đề xuất
Current-to-Voltage Conversion
The LM2904PW can implement a transimpedance stage for low-frequency photodiode, sensor, or current-source signals when the required bandwidth is consistent with its 700 kHz gain-bandwidth product. The common-mode input range that includes ground supports current measurements taken near the lower rail, and the dual package permits conversion of two independent channels. Because transimpedance performance depends strongly on input capacitance, feedback resistance, bias current, and stability margins, the exact input-bias-current and offset-voltage limits must be obtained from the manufacturer datasheet. Photodiode designs with substantial junction capacitance or nanosecond-scale response should use a dedicated transimpedance amplifier rather than the general-purpose LM2904PW.
Được đề xuất
Power Supply Monitoring and Control
The LM2904PW can monitor and amplify supply-voltage or fault signals in industrial control systems while operating from a single or split supply. The 26 V maximum supply rating supports higher-voltage monitoring circuitry than many low-voltage amplifier families, and the 700 kHz gain-bandwidth product is more than adequate for slow control-loop signals. The common-mode range including ground allows direct sensing near the lower rail, although the exact input range and output swing must be checked under actual rail conditions. Its 0.7 mA typical supply-current drain can assist in auxiliary or always-on monitoring paths. For precision threshold decisions, offset and comparator-hysteresis behavior may justify a dedicated comparator instead.
Được đề xuất
Data Acquisition Interface
The LM2904PW can serve as the input buffer and gain stage between slower sensors and a data-conversion system. Its dual-channel architecture maps naturally to two analog inputs, while 700 kHz gain-bandwidth product provides margin for many low-rate acquisition systems. The part can also operate from split supplies when the input signal is centered around zero, or from a single supply when signals are ground-referenced. Practical designs must account for settling accuracy, input offset, bias-current error, common-mode limits, and output drive, because those parameters were not fully present in the retrieved source excerpts. The internally compensated architecture reduces external stabilization components, but PCB leakage and high-impedance source nodes still require careful layout.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LM2904PW — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | LM2904B | LM2904BA | LM2904LV | LM2904DT |
|---|---|---|---|---|---|
| Package | 8-TSSOP | 8-TSSOP | 8-TSSOP | 8-TSSOP | 8-TSSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics |
| Number of Amplifiers | 2 | 2 | 2 | 2 | 2 |
| Supply Configuration | Single or split supply | Single or split supply | Single or split supply | Single or split supply | Single or split supply |
| Product Generation | Original LM2904 family | Next-generation LM2904 family | Next-generation LM2904 family | LM2904 low-voltage family | Cross-brand LM2904 family |
Bảo phân biệt quan trọng
- Lower gain-bandwidth product than the upgraded LM2904B (vsLM2904B)
- Direct association with the original industry-standard LM2904 family (vsLM2904DT)
- Two amplifiers in a compact 8-TSSOP package (vsLM2904B)
Ghi chú thiết kế
Place the supply bypass capacitor immediately between pins 4 and 8, with the shortest possible ground-return path. For dual-supply operation, treat pins 4 and 8 as separate rails and verify the permitted maximum total supply voltage. Keep feedback resistors close to the corresponding amplifier pins because parasitic resistance can alter closed-loop gain, while high-impedance input traces should be guarded to reduce leakage and surface contamination.
Do not assume that a general-purpose dual op amp has rail-to-rail input or output capability. The verified information states only that the common-mode input range includes ground; it does not establish operation near the positive rail. Before choosing a gain, calculate the required input and output ranges under minimum and maximum supply conditions and verify them against the manufacturer datasheet. Use the LM2904PW for signals well inside those limits.
Although the LM2904 has a 700 kHz gain-bandwidth product, the usable signal bandwidth depends on closed-loop gain, slew rate, output loading, and feedback stability. Avoid driving large capacitive loads unless the output-capacitance limit is confirmed, and keep feedback loops compact. For high-impedance sources, account for bias-current error and input bias-current return paths rather than treating input offset alone as the total DC error.
The 8-TSSOP package offers limited heat-dissipation area compared with larger packages. Power dissipation increases with supply voltage, output current, and output-stage activity, particularly during charging a load or driving toward a rail. The retrieved data does not include thermal resistance or output-current limits, so a new design should obtain those values from the manufacturer datasheet and use PCB thermal analysis before operating near the maximum supply and current limits.
Thông tin tuân thủ
The retrieved search results did not provide explicit compliance declarations for the LM2904PW. Compliance values remain unknown rather than being inferred from the manufacturer or package.
