LM2904PWRG4 - Dual 26V 700kHz Op Amp | Texas Instruments
MPN: LM2904PWRG4 ✓ Hoạt độngLM2904PWRG4 Tóm tắt
An operational amplifier is a high-gain differential amplifier used to compare or amplify small voltage signals. The LM2904 belongs to the operational-amplifier hierarchy, where an op amp forms part of a broader analog and mixed-signal processing system. Its low supply-current consumption, common-mode input range that includes ground, and wide supply-voltage range make it useful in sensor interfaces, buffer stages, audio paths, and low-to-moderate-frequency control loops.
The two channels provide approximately 0.3 V/us slew rate, 3 mV typical input offset voltage, 2 nA typical input offset current, and 20 nA typical input bias current. Typical supply-current consumption is 0.7 mA. Internal frequency compensation removes the need for external compensation in conventional closed-loop configurations, while the common-mode range extending toward ground supports direct sensing of signals near the lower supply rail.
Each channel can operate independently, allowing simultaneous amplification, filtering, voltage comparison, or buffering. The device includes input-bias-current compensation and differential-input protection through internal clamp structures, supporting operation in conventional industrial control and instrumentation circuits. Designers must still observe the absolute maximum ratings for supply voltage, input voltage, current, junction temperature, and package power dissipation.
Typical uses include low-frequency sensor conditioning, 4-20 mA receiver stages, audio preamplification, comparator-based control, active filters, and general-purpose analog interfaces. The dual configuration reduces component count when two independent analog functions are needed, while the compact TSSOP package suits densely assembled control boards.
The main design consideration is bandwidth and stability. The 700 kHz gain-bandwidth product and 0.3 V/us slew rate are appropriate for low-frequency precision and general-purpose circuits, but they do not target high-speed signal chains. Check the required closed-loop gain, output swing, load impedance, supply voltage, and input common-mode range against the manufacturer datasheet.
This product page combines the device specifications, application guidance, same-footprint alternatives, and engineering-oriented selection considerations. It also identifies where a redesign should focus on supply range, slew rate, precision, or package compatibility rather than treating every dual op amp as an interchangeable replacement.
Bộ thay thế dễ dàng lắp đặt cho LM2904PWRG4 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
LM2904PWR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM358PWR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM358PWRG4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM358APWR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM358APWRG4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2904PWRG4 Tỷ lệ tối đa & tính chất điện
| Amplifier Type | Dual 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 |
| Typical Supply Current | 0.7 mA |
| Typical Input Offset Voltage | 3 mV |
| Typical Input Offset Current | 2 nA |
| Typical Input Bias Current | 20 nA |
| Common-Mode Input Range | Includes ground |
| Differential Input Voltage Range | 32 V |
| Compensation | Internally frequency compensated |
| Khoảng nhiệt độ hoạt động | -40°C to +125°C |
| Hộp | 8-pin TSSOP, 4.40 mm width |
| Kiểu lắp đặt | Surface mount |
| Packaging | Tape and reel |
Hướng dẫn cấu hình chân LM2904PWRG4 8-pin tssop, 4.40 mm width
Cấu hình chân cho LM2904PWRG4 (8-pin tssop, 4.40 mm width gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho LM2904PWRG4.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
LM2904PWRG4 phù hợp cho 6 Áp dụngs: Industrial Sensor Signal Conditioning, 4-20 mA Current Loop Receiver, Audio Preamplification and Buffering, Active Filtering and Control Loops, Portable Measurement Equipment, Power Supply Feedback and Monitoring.
Industrial Sensor Signal Conditioning
The LM2904PWRG4 fits low-frequency sensor-conditioning stages because each channel combines a 700 kHz gain-bandwidth product with approximately 0.7 mA typical supply-current consumption. Two channels can buffer a sensor output and amplify a reference or feedback signal within one 8-pin TSSOP. Its common-mode input range includes ground, which supports circuits that sense small voltages near the lower supply rail. The 0.3 V/us slew rate is sufficient for low-bandwidth measurements but may limit large-signal conditioning. Confirm output swing, load impedance, input offset accuracy, and operating supply against the manufacturer datasheet before committing to a precision instrumentation design.
Được đề xuất
4-20 mA Current Loop Receiver
The LM2904PWRG4 can form the input stage of a 4-20 mA process-control receiver when the loop operates near ground and the required signal bandwidth is below the device's 700 kHz gain-bandwidth capability. Its common-mode input range includes ground, while the dual-channel arrangement allows one amplifier to buffer the measurement and the other to drive or condition a reference. The 3 mV typical input offset and 2 nA typical input offset current are important when determining shunt-amplifier accuracy. Input clamps, surge protection, and the 32 V differential-input range must be evaluated against industrial wiring transients before the device is placed directly at the connector.
Được đề xuất
Audio Preamplification and Buffering
The LM2904PWRG4 is appropriate for inexpensive, low-frequency audio preamplifier or active-buffer stages when the signal bandwidth is well below 700 kHz. Two channels support stereo or dual-mono signal paths, and the 0.3 V/us slew rate can reproduce many line-level signals without requiring a modern high-speed rail-to-rail amplifier. Input offset voltage of 3 mV typical may be significant in high-gain microphone paths, so microphone biasing, gain distribution, and source impedance should be reviewed. Output headroom and distortion must also be checked at the intended supply voltage and load because the device is not specified as a rail-to-rail output amplifier.
Được đề xuất
Active Filtering and Control Loops
The LM2904PWRG4 is useful in low-frequency active-filter and control-loop designs because both channels are internally frequency compensated and offer a 700 kHz gain-bandwidth product. A typical application can use one amplifier in an inverting filter stage and the other in a feedback or summation path. Its low typical supply-current draw of 0.7 mA is advantageous in power-constrained instrumentation. However, the op amp is intended for general-purpose rather than precision or high-speed closed-loop service. Before implementation, check closed-loop gain, phase margin, output loading, and component tolerances because changing the feedback network can reduce stability margin even when the nominal bandwidth appears adequate.
Được đề xuất
Portable Measurement Equipment
The LM2904PWRG4 suits portable measurement equipment where two analog channels and low power consumption are more important than precision offset or rail-to-rail operation. Approximately 0.7 mA typical supply current helps preserve battery life, while the 8-pin TSSOP saves board area. The common-mode input range including ground makes it practical for circuits powered from a single positive supply. Designers should account for startup behavior, input bias-current error, output settling, and battery-voltage variation. If the instrument requires measurements near the positive rail, or if the analog front end must remain accurate across a wide temperature range, a rail-to-rail precision amplifier may provide a better system-level result.
Được đề xuất
Power Supply Feedback and Monitoring
The LM2904PWRG4 can monitor and amplify power-supply feedback signals in low-frequency control systems because its 26 V maximum supply rating provides headroom for higher-voltage rails than many low-voltage amplifiers. The two channels can independently compare a scaled feedback voltage against a reference and buffer the resulting measurement for an ADC or controller. The common-mode range including ground is useful when the feedback node approaches zero. This arrangement still requires external resistor dividers, filtering, and protection, and the amplifier must remain below its absolute maximum supply and input limits. Its 3 mV typical offset should be included in the error budget for high-resolution monitoring.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LM2904PWRG4 — 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 | LM2904PWR | LM358PWR | LM358PWRG4 | LM358APWR | LM358APWRG4 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-TSSOP (4.40 mm width) | 8-TSSOP (4.40 mm width) | 8-TSSOP | 8-TSSOP | 8-TSSOP | 8-TSSOP |
| Number of Channels | 2 channels | 2 channels | 2 channels | 2 channels | 2 channels | 2 channels |
Bảo phân biệt quan trọng
- Higher stated maximum supply rating than related LM358-family alternatives (vsLM358PWR)
- Defined low-frequency bandwidth and slew-rate performance (vsLM358APWR)
- Dual-channel integration in a compact TSSOP package (vsLM2904PW)
Ghi chú thiết kế
Place each decoupling capacitor between the corresponding supply pin and ground with the shortest possible trace. Keep the TSSOP ground connection and via arrangement compact because high-gain analog stages can pick up supply and ground disturbances. Route input and feedback traces away from switching nodes and high-current paths. The 0.173 inch body width requires a footprint matching the manufacturer's 8-pin TSSOP mechanical drawing rather than an SOIC-8 footprint.
Check both the absolute maximum supply voltage and the actual output-current dissipation before applying power. The LM2904PWRG4 is rated for a 26 V maximum supply, so industrial transients can require external clamps or protection. Calculate worst-case dissipation from the actual output voltage, load current, supply voltage, and ambient temperature. Do not use the 700 kHz gain-bandwidth product as a substitute for checking closed-loop stability or output-current capability.
Use the amplifier in a low-frequency application unless a full stability and settling analysis confirms otherwise. Its 700 kHz gain-bandwidth product and 0.3 V/us slew rate suit general-purpose signal conditioning, but high closed-loop gain, capacitive loading, or fast transients can reduce phase margin. For precision measurements, include the typical 3 mV input offset and typical 2 nA input offset current in the error budget.
Do not assume that every 8-pin dual op amp is electrically interchangeable even when the package matches. Verify power pins, channel assignments, input common-mode range, output swing, differential-input limits, and supply requirements for each candidate. The LM358-family alternatives can have different device-specific limits, so review their manufacturer datasheets before modifying an LM2904PWRG4 schematic or PCB.
Thông tin tuân thủ
Compliance attributes were not stated in the manufacturer or distributor result excerpts and therefore remain unknown.
