LM2904AVQDRG4 - Dual 36V 1MHz Op Amp | Texas Instruments
MPN: LM2904AVQDRG4 ✓ ActiveLM2904AVQDRG4 Overview
An operational amplifier, or op amp, is a high-gain analog signal-conditioning component that compares its inverting and non-inverting inputs and drives its output toward the difference between them. The LM2904 belongs to the broader hierarchy of dual operational amplifiers, analog amplifiers, integrated circuits, and general-purpose analog signal-processing devices. Its two channels share power pins but otherwise operate independently, allowing one package to provide amplification, buffering, filtering, or comparison functions.
The principal benefits are a 1 MHz gain-bandwidth product, a 0.3 V/µs slew rate, and low supply-current drain of approximately 0.7 mA per amplifier. Each amplifier includes frequency compensation and is designed for operation from single or split supplies. The input common-mode range includes ground, which supports common single-supply signal-conditioning arrangements. The automotive-qualified ordering option is identified by the Q designation in the part number, although qualification documentation should be checked for the specific production configuration.
The internal architecture is designed for dependable general-purpose operation with a useful combination of gain, bandwidth, input range, and supply flexibility. A typical noninverting amplifier gain of 100 has a closed-loop bandwidth of approximately 10 kHz, while a unity-gain configuration supports signal bandwidth up to the device's stated 1 MHz gain-bandwidth product. These figures make the amplifier suitable for slow sensor signals, audio-frequency circuits, feedback-control loops, and general analog conditioning rather than high-speed data acquisition.
Typical applications include industrial sensor interfaces, automotive signal-conditioning modules, low-frequency active filters, audio preamplifier stages, current sensing with resistive shunts, and dual-rail buffer circuits. Two independent channels can process complementary signals or perform separate functions, reducing component count and conserving board area compared with two single amplifiers.
When designing the circuit, check input and output common-mode limits at the actual supply voltage. Load output signals through appropriate biasing, use a stable reference for precision offset-sensitive measurements, and avoid operating the amplifier near supply-rail limits without confirming the input and output ranges. Place decoupling capacitors close to the power pins and keep feedback traces short to reduce oscillation and noise pickup.
This page consolidates the device identity, ordering information, package details, pin assignment, engineering alternatives, and practical design guidance needed to evaluate the LM2904AVQDRG4 for a new analog circuit.
Drop-in alternatives for LM2904AVQDRG4 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LM2904AVQDRG4 (same form factor and footprint) — differing in Amplifier Type, Package, Common-Mode Input Range, Slew Rate, Input Offset Voltage.
LM2904ADR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LM2904DR
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →LM2904BDR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LM2904BADR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LM358DR
✅ Drop-InContact for price
View Datasheet →LM2904AVQDRG4 Maximum Ratings & Electrical Characteristics
| Number of Amplifier Channels | 2 channels |
| Amplifier Type | General-purpose operational amplifier |
| Gain-Bandwidth Product | 1 MHz |
| Manufacturer Product Page Bandwidth | 700 kHz |
| Slew Rate | 0.3 V/µs |
| Maximum Total Supply Voltage | 36 V |
| Single-Supply Maximum Voltage | 26 V |
| Minimum Total Supply Voltage | 3 V |
| Supply Current Per Amplifier | 0.7 mA typical |
| Common-Mode Input Range | Includes ground |
| Maximum Operating Temperature | 125 °C |
| Package | 8-SOIC, 3.90 mm width |
| Pin Count | 8 pins |
| Mounting Type | Surface mount |
| Packaging | Tape and reel |
LM2904AVQDRG4 Pin Configuration
| Pin 1 | OUT1 — Amplifier 1 output |
| Pin 2 | IN1- — Amplifier 1 inverting input |
| Pin 3 | IN1+ — Amplifier 1 non-inverting input |
| Pin 4 | V- — Negative supply connection |
| Pin 5 | IN2+ — Amplifier 2 non-inverting input |
| Pin 6 | IN2- — Amplifier 2 inverting input |
| Pin 7 | OUT2 — Amplifier 2 output |
| Pin 8 | V+ — Positive supply connection |
Typical Applications
LM2904AVQDRG4 is suitable for 6 applications: Industrial Sensor Signal Conditioning, Automotive Low-Speed Analog Conditioning, Audio Preamplifier Stages, Active Filters and Control Loops, Shunt Current Sensing, General-Purpose Buffering and Amplification.
Industrial Sensor Signal Conditioning
The LM2904AVQDRG4 is well suited to amplifying low-level sensor signals because its 1 MHz gain-bandwidth product supports useful closed-loop bandwidth at practical gains, while its input common-mode range includes ground. For a bridge, thermocouple, or resistive divider front end, the amplifier can be configured as a difference stage or noninverting gain stage around a mid-supply reference. The 0.3 V/µs slew rate limits large-signal response, while the approximately 0.7 mA supply current per channel supports low-power instrumentation. Designers should verify source impedance, offset, bias-current effects, and output swing at the actual 5 V or 12 V supply.
Recommended
Automotive Low-Speed Analog Conditioning
The LM2904AVQDRG4 fits automotive low-speed analog interfaces because it combines two channels, a 3 V minimum total supply, a 26 V single-supply limit, and a 125 °C maximum operating temperature. The Q-designated ordering option supports automotive qualification workflows when the exact part and production lot meet the vehicle program's requirements. Its two independent amplifiers can process complementary sensor outputs or provide gain in one channel and filtering in the other. Keep transient protection and grounding outside the IC, and confirm that every external component and diagnostic strategy satisfies the vehicle's electrical and environmental requirements.
Recommended
Audio Preamplifier Stages
Each LM2904AVQDRG4 channel can provide modest audio-band gain, buffering, or active filtering because the 1 MHz gain-bandwidth product is ample for common low-frequency audio paths and the 0.3 V/µs slew rate supports moderate signal amplitudes. The 8-SOIC package also places two independent amplifiers together for stereo preamplification, microphone conditioning, or line-stage buffering. Audio designs should account for input-bias-current noise, output-current limits, and distortion at the selected gain. Using both channels in a balanced signal path can also simplify routing, although common-mode rejection depends on resistor matching and board symmetry.
Recommended
Active Filters and Control Loops
The LM2904AVQDRG4 is suitable for first-order or low-order active filters and feedback-control loops where 1 MHz gain-bandwidth product and approximately 0.7 mA supply current per amplifier provide a practical balance of speed and power. Both channels can implement a two-pole filter when their RC networks share a common node, or they can provide independent loop amplifiers. Calculate each pole and resistor value against the closed-loop gain rather than the unity-gain bandwidth. Capacitor tolerances, resistor noise, output loading, and phase margin should be checked across temperature because they determine the practical stability margin of the assembled circuit.
Recommended
Shunt Current Sensing
The LM2904AVQDRG4 can amplify the small voltage generated across a shunt resistor in a bidirectional or unidirectional current-measurement circuit. Its low-frequency bandwidth and 0.7 mA typical supply current suit many power-supply and motor-control monitoring paths, while the two channels can handle a current signal and a temperature or threshold signal. Choose a shunt resistance that keeps the amplifier output within its output-swing range and preserves sufficient input common-mode margin. Kelvin connections, ground-current control, and filtering are important because shared copper resistance can otherwise appear as measurement error.
Recommended
General-Purpose Buffering and Amplification
The LM2904AVQDRG4 can serve as a unity-gain buffer when a sensor or ADC input requires reduced loading, or as a voltage amplifier when a higher input impedance is needed between a source and a downstream circuit. Its input common-mode range includes ground, making it practical in single-supply systems where signals remain near zero volts. The 8-SOIC package consolidates two channels and reduces board area. Verify that the source stays within the common-mode range, the output remains inside its swing limits, and capacitive loading does not compromise stability. The 0.3 V/µs slew rate also defines useful response times for changing analog events.
Recommended
Recommended Products Summary
Engineering reference data for LM2904AVQDRG4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM2904ADR | LM2904DR | LM2904BDR | LM2904BADR | LM358DR |
|---|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC - same footprint | 8-SOIC - same footprint | 8-SOIC - same footprint | 8-SOIC - same footprint | 8-SOIC - same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Channels | 2 channels | 2 channels | 2 channels | 2 channels | 2 channels | 2 channels |
| Maximum Total Supply Voltage | 36 V | 36 V | 36 V | 36 V | 36 V | 30 V |
| Maximum Single-Supply Voltage | 26 V | 26 V | 26 V | 26 V | 26 V | 30 V |
Key Differentiators
- Higher voltage capability than the LM358 family alternative (vs LM358DR)
- Two independent general-purpose channels in one compact package (vs LM2902DR)
- Automotive-oriented Q-designated ordering option (vs LM2904DR)
- Established LM2904 electrical class with 1 MHz bandwidth (vs LM2904BDR)
Design Notes
Decouple each supply connection with a short path to ground and place the capacitor immediately beside the appropriate 8-SOIC power pin. Keep sensitive signal returns away from the power trace and capacitor ground path to minimize common supply impedance. The LM2904 can operate from a 3 V minimum total supply, but the usable output range narrows near either rail. Check input common-mode voltage and output swing against the actual supply before finalizing gain and biasing.
Keep each feedback network close to its associated amplifier and use a compact ground return around pins 2, 3, 5, and 6. For dual-channel differential or audio circuits, maintain symmetrical resistor values and routing so channel mismatch does not degrade common-mode rejection. Avoid routing outputs directly beneath the input and supply pins, and use a solid ground plane where possible. These practices reduce parasitic feedback, channel crosstalk, and sensitivity to nearby switching nodes.
Do not assume that a matching 8-SOIC footprint guarantees an equivalent substitution. The LM2904 family and LM358 family differ in voltage class and detailed electrical limits, while ordering suffixes can change qualification and temperature grade. Verify maximum supply voltage, input common-mode range, output swing, load current, slew rate, and package orientation before releasing a replacement. For a single-supply circuit, also confirm that input signals remain above the negative rail and that output signals do not clip.
The LM2904 is intended for general-purpose, low-frequency analog amplification rather than high-speed data paths. At gains near 100, the 1 MHz gain-bandwidth product corresponds to roughly 10 kHz closed-loop bandwidth, so higher-frequency signals will be attenuated. Use the gain-bandwidth and slew-rate limits when designing filters or feedback loops, and add explicit filtering where ultrasonic noise, switching ripple, or fast transients could otherwise drive the output or cause instability.
Compliance Information
The part number contains a Q automotive designation, but the exact AEC-Q100 status and other compliance statements require confirmation from the manufacturer documentation for the ordered configuration.