LM2904AVQPWR - Dual 30V 700kHz Op Amp | Texas Instruments
MPN: LM2904AVQPWR ✓ Hoạt độngLM2904AVQPWR Tóm tắt
An operational amplifier is an analog building block that amplifies the voltage difference between its differential input while using negative feedback to set closed-loop gain and bandwidth. The LM2904 belongs to the broader hierarchy of linear amplifiers, analog signal-chain ICs, and semiconductor components. It is internally compensated, which simplifies implementation by removing the need for an external compensation capacitor in standard closed-loop configurations.
Key characteristics include low supply-current drain, low input bias and offset currents, and an input common-mode range that extends close to ground for single-supply applications. The typical supply-current consumption is 0.7 mA per amplifier. Its broad supply range and temperature rating support industrial control, automotive, instrumentation, and test-equipment designs where the amplifier must operate across changing supply and ambient conditions.
The LM2904 architecture uses two independent, high-gain, frequency-compensated amplifiers in one package. Internal compensation establishes the dominant pole and makes unity-gain operation practical without external compensation components. The 700 kHz gain-bandwidth product supports moderate-frequency signal conditioning rather than high-speed data acquisition, so layout should minimize feedback-loop area and keep sensitive input nodes away from supply and output routing.
Typical uses include sensor-amplifier front ends, low-frequency active filters, comparator-style threshold circuits with saturation recovery, audio preamplifier stages, and programmable control interfaces. For automotive and industrial systems, the wide operating-temperature range and wide supply tolerance are especially useful, while the low input bias current helps preserve sensor accuracy.
When designing around the LM2904AVQPWR, verify the input common-mode range against the actual signal and supply levels, particularly near the positive rail. Decoupling capacitors should be placed directly across the supply pins, and unused amplifier inputs must be biased rather than left floating. Avoid relying on the device for millivolt-level precision tasks without checking offset, drift, and bias-current contributions for the complete signal chain.
This page consolidates package details, verified distributor pricing evidence, drop-in alternatives, and application-oriented design guidance for engineers evaluating the LM2904AVQPWR. It also distinguishes supply-voltage, temperature, channel-count, and bandwidth trade-offs among pin-compatible LM2904-family options.
Bộ thay thế dễ dàng lắp đặt cho LM2904AVQPWR — 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 LM2904AVQPWR (cùng hình factor và footprint) — khác nhau ở Amplifier Type, Automotive Qualification, Compensation, RoHS Status.
LM2904AVQPWRQ1
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2904AQPT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LM2904AYPT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LM2904APT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LM2904AVQPWR Tỷ lệ tối đa & tính chất điện
| Number of Amplifiers | 2 channels |
| Amplifier Type | Dual general-purpose operational amplifier |
| Maximum Total Supply Voltage | 30 V |
| Single-Supply Operating Range | Up to +13 V |
| Gain-Bandwidth Product | 700 kHz |
| Typical Supply Current per Amplifier | 0.7 mA |
| Khoảng nhiệt độ hoạt động | -40°C to +125°C |
| Hộp | 8-pin TSSOP (PW) |
| Package Body Width | 4.40 mm |
| Kiểu lắp đặt | Surface Mount |
| Compensation | Internal frequency compensation |
| Common-Mode Input Range | Includes ground |
| Automotive Qualification | Automotive-grade variant available as LM2904AVQPWRQ1 |
| Cấp MSL | MSL 1 - 260°C unlimited floor life |
| Trạng thái RoHS | Compliant |
Hướng dẫn cấu hình chân LM2904AVQPWR 4.40 mm
Cấu hình chân cho LM2904AVQPWR (4.40 mm 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 LM2904AVQPWR.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
LM2904AVQPWR phù hợp cho 6 Áp dụngs: Industrial Sensor Signal Conditioning, Automotive Control Interface, Low-Frequency Active Filtering, Transducer Bridge Amplification, Audio Preamplifier Stage, Test and Measurement Equipment.
Industrial Sensor Signal Conditioning
The LM2904AVQPWR fits resistive-sensor front ends that require two independent analog channels within a single 8-pin TSSOP package. Its low input bias and offset currents help reduce measurement error, while the common-mode input range includes ground for signals referenced to the lower supply rail. The 30 V maximum supply rating also supports 24 V industrial systems. In a typical conditioning stage, one amplifier amplifies the sensor output and the second provides gain or an active-filter function. Keep the high-impedance input traces short, bias unused inputs, and place supply-decoupling capacitors adjacent to the device.
Được đề xuất
Automotive Control Interface
The LM2904AVQPWR is appropriate for low-frequency automotive control and conditioning circuits that need a wide supply range and operation over -40°C to 125°C. Its dual-channel arrangement supports independent error-amplifier and buffer functions, while the 700 kHz gain-bandwidth product is sufficient for slow control loops rather than high-speed communication. The automotive-qualified LM2904AVQPWRQ1 is the preferred option when AEC-Q100 qualification and automotive traceability are mandatory. Protect external inputs against transients and keep sensitive analog routing separated from actuator drive lines.
Được đề xuất
Low-Frequency Active Filtering
The LM2904AVQPWR can implement first- and second-order active filters for audio, vibration, and process-control signals because each channel provides internally compensated gain at approximately 700 kHz. One amplifier may form an inverting stage while the other supplies the required feedback or buffering. Component tolerances and the amplifier's finite gain-bandwidth product determine the achieved cutoff accuracy and phase response. Validate stability in the physical layout, especially when capacitor values create high closed-loop gain near the gain-bandwidth limit.
Được đề xuất
Transducer Bridge Amplification
The dual LM2904AVQPWR is useful in bridge-amplifier and instrumentation designs where two amplifiers must operate over a wide voltage range and temperature interval. Its low supply-current drain of approximately 0.7 mA per amplifier reduces power consumption in portable measurement equipment, while the common-mode input range extending toward ground supports bridge returns near 0 V. Resistor-network matching determines the common-mode rejection, so use closely matched precision resistors and maintain symmetric layout. The 700 kHz bandwidth handles slow mechanical or temperature signals without requiring a high-speed amplifier.
Được đề xuất
Audio Preamplifier Stage
The LM2904AVQPWR supports cost-effective microphone and line-level preamplifier circuits because it combines two general-purpose amplifier channels in one package. The internal frequency compensation simplifies standard inverting and non-inverting gain stages, and the low supply-current drain suits battery-operated audio equipment. Gain-bandwidth limits require care: excessive closed-loop gain narrows the usable bandwidth and increases distortion risk. Set input and feedback resistors with low noise, keep the input node compact, and use stable film capacitors where the circuit depends on accurate frequency response.
Được đề xuất
Test and Measurement Equipment
The LM2904AVQPWR is useful in buffer, comparator, and programmable-reference circuits within laboratory and field test equipment. Two independent amplifiers can provide input buffering and level shifting in a single 8-pin TSSOP footprint, simplifying board space in multi-function instruments. Its broad operating-temperature range supports equipment used in uncontrolled environments, while the low supply-current draw benefits from portable instruments. Use the pin-configuration and recommended operating conditions in the manufacturer datasheet to establish safe input and output ranges for each measurement mode.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LM2904AVQPWR — 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 | LM2904AVQPWRQ1 | LM2904AQPT | LM2904AYPT | LM2904APT |
|---|---|---|---|---|---|
| Package | 8-TSSOP (PW) | 8-TSSOP (PW) - same | 8-TSSOP (PW) - same | 8-TSSOP (PW) - same | 8-TSSOP (PW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Amplifiers | 2 channels | 2 channels | 2 channels | 2 channels | 2 channels |
| Maximum Total Supply Voltage | 30 V | 30 V | 30 V | 30 V | 30 V |
| Gain-Bandwidth Product | 700 kHz | 700 kHz | 700 kHz | 700 kHz | 700 kHz |
| Typical Supply Current per Amplifier | 0.7 mA | 0.7 mA | 0.7 mA | 0.7 mA | 0.7 mA |
| Operating Temperature Range | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C |
| Automotive Qualification | Standard ordering option | Automotive-qualified option | Automotive-grade ordering option | Grade-specific ordering option | Standard grade ordering option |
| Internal Compensation | Yes | Yes | Yes | Yes | Yes |
| Input Common-Mode Range | Includes ground | Includes ground | Includes ground | Includes ground | Includes ground |
Bảo phân biệt quan trọng
- Wide supply operation in a compact dual-amplifier package (vsLM2904APT)
- Automotive-qualified ordering path without a footprint change (vsLM2904AVQPWRQ1)
- Ground-referenced common-mode operation for single-supply designs (vsLM2904AYPT)
Ghi chú thiết kế
Place the supply-decoupling capacitor directly across the amplifier's supply and ground pins, with the shortest possible trace between the capacitor and the device. A second local bypass capacitor can suppress higher-frequency supply noise. Keep the two sensitive input nodes physically separate from output and supply routing because the high open-loop gain of this amplifier family can convert small coupled signals into output errors.
Route each feedback loop as a compact loop and avoid routing the feedback trace alongside the input trace. The LM2904AVQPWR has a 700 kHz gain-bandwidth product, so stability is adequate in conventional closed-loop designs, but large capacitive loads, excessive closed-loop gain, or long feedback paths can reduce phase margin. Confirm stability with the intended load and PCB geometry before production release.
Do not leave either input of an unused amplifier floating. Bias the unused channel with a resistor network referenced to a valid common-mode voltage, and verify that its output remains within the amplifier's output-swing range. Also check the signal against both the input common-mode range and the output-swing limits because these limits differ and neither reaches the full positive supply rail.
Estimate: each channel can consume approximately 0.7 mA under the stated typical condition, so dual-channel current is about 1.4 mA before output-current contribution. At a 24 V total supply the internal dissipation from supply-current draw alone is approximately 33.6 mW, which is normally minor. Actual channel dissipation depends on output voltage, load current, and quiescent current, so evaluate the complete operating state rather than the typical quiescent value alone.
Thông tin tuân thủ
The LM2904AVQPWR is identified as RoHS compliant. Select the LM2904AVQPWRQ1 automotive-qualified option when AEC-Q100 qualification is required for the target application.