NCV2904DR2G - Dual Op-Amp, 3-26V Single Supply | onsemi
MPN: NCV2904DR2G ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.42 | $0.42 |
| 10 | $0.36 | $3.60 |
| 100 | $0.28 | $28.00 |
| 500 | $0.23 | $115.00 |
| 1,000 | $0.19 | $190.00 |
NCV2904DR2G Overview
An operational amplifier (op-amp) is a high-gain differential voltage amplifier that sits within the analog signal chain hierarchy: op-amp -> amplifier IC -> analog IC -> semiconductor. Dual op-amps integrate two independent amplifier cores in one package, halving board space and BOM line items versus two singles. Single-supply op-amps like the NCV2904 are specifically designed for input common-mode ranges that reach the negative rail, making them usable directly on ground-referenced sensor signals without negative supplies.
Key features of the NCV2904 include low power drain, short-circuit protected outputs, a true differential input stage, internally compensated frequency response, and ESD clamps on the inputs. The NCV prefix designates onsemi automotive qualification and temperature screening, making this device suitable for under-hood and body-electronics environments. Per the onsemi datasheet, the LM358 series is equivalent to one-half of an LM324, positioning the NCV2904 as the automotive member of this industry-standard family.
Technically, the NCV2904 uses the circuit designs perfected for the quad LM2904/LM324 family: an internally compensated architecture that provides unity-gain stability without external compensation components. Single-supply or split-supply operation gives designers flexibility across 3.0 V to 26 V rails, and the input bias currents are low, minimizing offset errors with high-impedance sensors.
Typical applications include automotive sensor signal conditioning (throttle position, pressure), battery-voltage monitoring dividers, comparators for window detection in ECUs, and general industrial signal amplification on single 5 V to 24 V rails.
A key design consideration: the output cannot swing to the positive rail, so gain-setting must keep target output levels below the VOH specification at the expected load current.
This page synthesizes distributor availability, drop-in alternatives across the LM258/LM358/LM2904 family, and practical design notes beyond what the manufacturer datasheet states.
Drop-in alternatives for NCV2904DR2G — 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 NCV2904DR2G (same form factor and footprint) — differing in Package, Slew Rate, Amplifier Type, Input Offset Voltage, Supply Voltage (Single).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LM2904DR2G
✅ Drop-In📋 Reference alternative (not in catalog)
NCV2904VDR2G
✅ Drop-In📋 Reference alternative (not in catalog)
LM358DR2G
✅ Drop-In📋 Reference alternative (not in catalog)
LM2904DR
✅ Drop-In✓ In Stock
$0.1 / Unit
View Datasheet →LM358DR
✅ Drop-In✓ In Stock
$0.0514 / Unit
View Datasheet →LM358DT
✅ Drop-In✓ In Stock
$0.0509 / Unit
View Datasheet →NCV2904DR2G Maximum Ratings & Electrical Characteristics
| Amplifier Type | General Purpose Operational Amplifier |
| Number of Circuits | 2 |
| Supply Voltage (Single Supply) | 3.0 V to 26 V |
| Supply Voltage (Split Supply) | +/-1.5 V to +/-13 V |
| Common Mode Input Range | Extends to ground/VEE |
| Output | Short circuit protected |
| Input Stage | True differential input |
| Compensation | Internally compensated |
| ESD Protection | ESD clamps on inputs |
| Input Bias Current | Low input bias current |
| Power Drain | Low power drain |
| Package | SOIC-8 (Case 751, D suffix) |
| Mounting Type | Surface Mount |
| Qualification | NCV automotive grade |
NCV2904DR2G Pin Configuration
| Pin 1 | 1OUT — Output of amplifier A |
| Pin 2 | 1IN- — Inverting input of amplifier A |
| Pin 3 | 1IN+ — Non-inverting input of amplifier A |
| Pin 4 | GND/VEE — Ground or negative supply |
| Pin 5 | 2IN+ — Non-inverting input of amplifier B |
| Pin 6 | 2IN- — Inverting input of amplifier B |
| Pin 7 | 2OUT — Output of amplifier B |
| Pin 8 | VCC — Positive supply, 3.0 V to 26 V |
Typical Applications
NCV2904DR2G is suitable for 6 applications: Automotive Sensor Signal Conditioning, Battery Voltage Monitoring, Industrial 24V PLC Input Modules, Active Filter Stages, Window Comparators for ECU Diagnostics, Single-Supply Audio Preamplification.
Automotive Sensor Signal Conditioning
The NCV2904's automotive NCV qualification and ground-sensing input common-mode range make it a natural fit for conditioning ground-referenced automotive sensors such as throttle-position, pressure, and level sensors in ECUs. Powered from the vehicle 12 V rail (within the 3.0 V to 26 V specification), each amplifier channel can be configured as a non-inverting gain stage with gain set by two resistors, scaling a 0-5 V sensor output to the ADC input range. The low power drain suits always-on body-electronics nodes, and short-circuit protected outputs tolerate wiring faults to ground. Because the input extends to ground/VEE, signals near 0 V are read accurately without a negative supply.
Recommended
Battery Voltage Monitoring
Monitoring a 12 V or 24 V battery rail with a ground-referenced ADC is a classic use for the NCV2904: a resistor divider drops the rail to a safe level and one amplifier channel buffers the divided node into the ADC, eliminating loading errors that a high-impedance divider would otherwise suffer. The 26 V single-supply ceiling covers 24 V industrial and dual-battery automotive systems directly. The second channel can implement an undervoltage threshold comparator against a reference. Low input bias current minimizes divider offset error, and the low power drain keeps quiescent battery load negligible in always-connected monitoring nodes.
Recommended
Industrial 24V PLC Input Modules
Programmable logic controller input cards frequently buffer 0-10 V or 4-20 mA derived signals on 24 V rails, and the NCV2904's 3.0 V to 26 V single-supply operation with ground-sensing inputs fits this environment directly. One channel amplifies and level-shifts the sensor signal; the second channel can be wired as an active rectifier or window comparator for signal-valid detection. The short-circuit protected outputs survive field-wiring faults common in industrial panels, and the internal compensation removes any need for external frequency components, simplifying channel-to-channel replication across a multi-input card at minimal cost per channel.
Recommended
Active Filter Stages
Because the NCV2904 is internally compensated and unity-gain stable, it implements Sallen-Key and multiple-feedback active filters without external compensation parts - two independent filter stages per SOIC-8 package. A second-order low-pass anti-aliasing filter ahead of an ADC, or a band-pass filter extracting a sensor tone, can be built with just resistors and capacitors per channel. The ground-extending input range simplifies single-supply biasing at mid-rail using a divider. Designers should keep closed-loop gain moderate and output swings below the VOH limit at load, since the output does not reach the positive rail.
Recommended
Window Comparators for ECU Diagnostics
Two comparators are typically required to detect whether a sensor voltage is inside a valid window - one for upper and one for lower threshold. The NCV2904 provides both channels in one SOIC-8, wired with reference dividers so each output asserts when the sensor crosses a limit; an external logic gate ORs the outputs into an MCU fault input. The 26 V supply tolerance and automotive NCV qualification make it suitable for under-hood diagnostic monitoring of throttle, pressure, and position sensors. ESD input clamps add robustness during assembly and vehicle-level transient exposure, protecting the reference divider nodes.
Recommended
Single-Supply Audio Preamplification
In cost-sensitive single-supply audio designs - intercoms, alarm annunciators, basic microphone preamps - the NCV2904 acts as a low-power preamplifier biased at mid-rail. Its low power drain suits battery-backed and always-on audio nodes, and the ground-extending input range makes AC-coupled biasing straightforward with a simple divider. One channel handles gain, the second can drive a volume-control stage or an active tone filter. Performance is general-purpose rather than hi-fi: designers needing sub-0.001% distortion should step up to dedicated audio amplifiers, but for annunciator-level reproduction the NCV2904 is fully adequate at very low cost.
Recommended
Recommended Products Summary
Engineering reference data for NCV2904DR2G — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM2904DR2G | NCV2904VDR2G | LM358DR2G | LM2904DR | LM358DR | LM358DT |
|---|---|---|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same |
| Brand | onsemi | onsemi | onsemi | onsemi | Texas Instruments | Texas Instruments | STMicroelectronics |
| Number of Circuits | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Single Supply Range | 3.0 V to 26 V | 3.0 V to 26 V | 3.0 V to 26 V | 3.0 V to 32 V | 3.0 V to 26 V | 3.0 V to 32 V | 3.0 V to 32 V |
| Automotive Grade (NCV prefix) | Yes | No | Yes | No | No | No | No |
| Common-Mode Input to Ground | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Output Protection | Short circuit protected | Short circuit protected | Short circuit protected | Short circuit protected | Short circuit protected | Short circuit protected | Short circuit protected |
Key Differentiators
- Automotive NCV qualification (vs LM2904DR2G)
- Lowest family cost at volume (vs LM358DR2G)
- Honest trade-off: not rail-to-rail (vs Rail-to-rail dual op-amps)
Design Notes
The NCV2904 output does not swing to the positive rail. Estimate: with a 12 V supply and typical load, expect headroom of roughly 1 to 1.5 V below VCC at moderate currents - verify against the VOH specification in the manufacturer datasheet for your exact load. Gain stages must be scaled so the maximum expected output stays below VOH, or peaks will clip. Similarly, do not exceed the input common-mode range; although inputs sense to ground, they are not rail-to-rail on the high side.
Place a 100 nF ceramic decoupling capacitor directly across pins 8 (VCC) and 4 (GND/VEE), with traces under 10 mm. Because both amplifiers share the same die and supply node, keep high-current output wiring away from the input traces of the opposite channel to avoid crosstalk through shared impedance. A solid ground plane under the SOIC-8 footprint is recommended practice per general analog layout guidance for the LM2904/LM358 family.
The NCV2904 includes ESD clamps on its inputs. When input signals can go below ground (inductive sensor rings, automotive transients), the clamp conducts - add series resistance sized to keep clamp current within absolute maximum limits. Estimated: a 10 kOhm series resistor limits current to about 1.4 mA during a -14 V transient relative to ground, well within typical clamp ratings; confirm the exact limit in the onsemi datasheet before finalizing.
Compliance Information
NCV prefix denotes onsemi automotive qualification. RoHS/REACH/lead-free status not stated in provided data - verify on the onsemi product page.
