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STMicroelectronics LM2904WHYDT
- Part No.:
- LM2904WHYDT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2904WHYDT.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,879
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Product details
Overview
LM2904WHYDT from STMicroelectronics is a dual, low-power, automotive-grade operational amplifier in SO8 package, featuring 100 dB DC gain, 1.1 MHz unity-gain bandwidth, 500 µA supply current per amplifier, ±2 nA input offset current, and rail-to-rail output swing (0 V to VCC – 1.5 V). It operates from 3 V to 30 V single supply and is qualified per AEC-Q100 Grade 1 (–40 °C to +150 °C), targeting engine control units and battery management sensors.
For engineers reviewing the LM2904WHYDT datasheet, LM2904WHYDT pinout, LM2904WHYDT application, or LM2904WHYDT equivalent, key selection criteria include its extended temperature range, internal frequency compensation, ground-sensing input common-mode range, and automotive qualification status - critical for under-hood signal conditioning and industrial sensor interfaces.
Technical Context
This dual op-amp integrates two independent high-gain amplifiers with internal frequency compensation, enabling stable unity-gain operation without external components. Its input stage supports common-mode voltage down to ground and differential input up to full supply rail, making it suitable for single-supply transducer interfacing.
The device delivers large output voltage swing (0 V to VCC – 1.5 V) and maintains low input bias current (20 nA typ.) across temperature, supported by ESD protection (2 kV HBM). It achieves 0.6 V/µs slew rate and 1.1 MHz gain-bandwidth product at 30 V supply, with supply current independent of VCC magnitude.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 30 V - enables direct interface with 5 V logic rails and robust operation in 12 V/24 V automotive systems |
| DC Voltage Gain | 100 dB - provides ≥10⁵ open-loop gain for precision DC amplification in sensor front-ends |
| Unity-Gain Bandwidth | 1.1 MHz - supports audio-frequency and fast transient response in closed-loop configurations |
| Input Offset Voltage | 7 mV max (25 °C) - defines baseline error in zero-input conditions for analog signal chains |
| Supply Current per Amp | 500 µA - enables ultra-low-power operation in always-on vehicle subsystems |
| Operating Temperature | –40 °C to +150 °C - certified for under-hood automotive placement per AEC-Q100 Grade 1 |
| Output Swing | 0 V to VCC – 1.5 V - allows near-ground-level output in single-supply configurations without level-shifting |
Pinout & Package
LM2904WHYDT is housed in an SO8 (Small Outline 8-pin) surface-mount package with standard 1.27 mm pitch, 5.0 mm × 4.0 mm body, and 1.75 mm height. It complies with ECOPACK® environmental standards and is lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Amplifier 1 output | Drives load directly; swing limited to 0 V to VCC – 1.5 V |
| 2 (IN1–) | Inverting input of Amp1 | Accepts feedback network connection; common-mode range includes ground |
| 3 (IN1+) | Non-inverting input of Amp1 | Accepts sensor or reference signal; supports input down to ground |
| 4 (VCC–) | Ground reference | Common return for both amplifiers; must be low-impedance path |
| 5 (IN2+) | Non-inverting input of Amp2 | Independent signal path; identical electrical behavior to IN1+ |
| 6 (IN2–) | Inverting input of Amp2 | Supports differential or single-ended configuration with same specs as IN1– |
| 7 (OUT2) | Amplifier 2 output | Electrically isolated from OUT1; shares same output swing limits |
| 8 (VCC+) | Positive supply rail | Single power source for both amplifiers; tolerant to 32 V absolute max |
Key Features
| Feature | Design Value |
|---|---|
| Internal frequency compensation | Enables stable unity-gain operation without external capacitors - reduces BOM count and layout sensitivity |
| Input common-mode range includes ground | Allows direct connection of grounded sensors (e.g., thermistors, strain gauges) without level-shifting circuitry |
| Low input bias current (20 nA typ.) | Minimizes voltage error across high-impedance sources such as pH electrodes or photodiode transimpedance nodes |
| Automotive qualification (AEC-Q100 Grade 1) | Validated for continuous operation at 150 °C junction temperature - suitable for engine control, transmission, and ADAS modules |
| ESD protection (2 kV HBM) | Reduces risk of field failure during handling and assembly in automotive manufacturing environments |
Applications
| Engine Coolant Temperature Sensing | Brake Fluid Pressure Amplification |
|---|---|
Use Scenario: Signal conditioning of NTC thermistor output in engine bay, exposed to ambient temperatures up to 125 °C. IC Role / Device Role / Timing Role: Dual op-amp configured as precision non-inverting amplifier and buffer, operating from 5 V microcontroller rail. Use Value: Ground-referenced input accepts thermistor voltage directly; 150 °C rating ensures reliability without heatsinking. | Use Scenario: Amplifying millivolt-level output from piezoresistive pressure transducer in hydraulic brake line monitoring. IC Role / Device Role / Timing Role: First-stage gain block with low input bias current to avoid loading transducer bridge. Use Value: 20 nA input bias current prevents significant offset error across 10 kΩ bridge impedance. |
| 12 V Battery State-of-Health Monitoring | Transmission Control Unit Analog Interface |
Use Scenario: Measuring battery terminal voltage and shunt-based current sense signals in start-stop systems. IC Role / Device Role / Timing Role: Dual-channel difference amplifier and level-shifter for bidirectional current sensing. Use Value: Output swing to 0 V enables direct ADC input to 3.3 V microcontroller without external pull-down. | Use Scenario: Conditioning analog signals from throttle position and gear selector potentiometers in automatic transmission ECU. IC Role / Device Role / Timing Role: Low-drift buffer and anti-alias filter driver for SAR ADC sampling at 10 kSPS. Use Value: 7 mV max input offset ensures <0.5% full-scale error over 0–5 V input range at 150 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-power op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2904QDR | TI part; AEC-Q100 Grade 1, SO8, but higher input offset voltage (7 mV max vs. 7 mV max), same 1.1 MHz GBW | Same automotive temperature range; slightly lower CMRR (70 dB min vs. 70 dB min) and no specified ESD rating | Select when TI sourcing preference exists and ESD robustness is not primary concern |
| TSV912IDT | ST part; rail-to-rail input/output, 8 MHz GBW, 1.1 mA supply current, but only rated to 125 °C (not AEC-Q100) | Superior bandwidth and input range, but unsuitable for under-hood use above 125 °C | Choose for non-automotive industrial designs requiring faster response and full rail compatibility |
Compared with LM2904QDR, LM2904WHYDT offers verified 2 kV HBM ESD protection and tighter thermal resistance (125 °C/W vs. 135 °C/W), while TSV912IDT trades automotive qualification for wider input/output range and higher speed - making LM2904WHYDT optimal for cost-sensitive, high-temperature, single-supply sensor interfaces.
Availability
LM2904WHYDT is available at Aetrix Electronics and suitable for engine control units, battery management systems, and transmission control modules requiring stable component supply across automotive production lifecycles.
Supply support for LM2904WHYDT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog components for automotive, industrial, and consumer markets.
LM2904WHYDT belongs to ST's automotive-qualified op-amp portfolio, engineered specifically for robust signal conditioning in harsh-temperature environments where reliability, long-term stability, and AEC-Q100 compliance are mandatory.
FAQ
Is LM2904WHYDT pin-compatible with standard LM2904 variants?
Yes, LM2904WHYDT uses the industry-standard SO8 pinout (1:OUT1, 2:IN1–, 3:IN1+, 4:GND, 5:IN2+, 6:IN2–, 7:OUT2, 8:VCC+), matching LM2904, LM2904B, and LM2904V. No PCB redesign is needed when upgrading to this AEC-Q100-qualified version.
What is the maximum junction temperature and thermal resistance for LM2904WHYDT in SO8 package?
The maximum junction temperature is 160 °C, with thermal resistance junction-to-ambient (RthJA) rated at 125 °C/W for SO8. This allows continuous operation at 150 °C ambient when power dissipation remains below 80 mW under typical load conditions.
Does LM2904WHYDT support rail-to-rail input or output operation?
LM2904WHYDT supports rail-to-rail output swing (0 V to VCC – 1.5 V) but not rail-to-rail input: the input common-mode range extends to ground and up to VCC – 1.5 V. Input voltages beyond those limits may cause phase reversal or increased bias current.
Can LM2904WHYDT drive a 2 kΩ load while maintaining full output swing?
Yes - the datasheet specifies output voltage swing of 0 V to VCC – 1.5 V into RL = 2 kΩ at Tamb = 25 °C. At 150 °C, swing degrades to 0 V to VCC – 2 V under same load, confirmed by Figure 5 and Table 4 electrical characteristics.
LM2904WHYDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Single-Ended
- Slew Rate:
- 0.6V/µs
- Gain Bandwidth Product:
- 1.1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 700µA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM2904WHYDT FAQ
1.How can I place an order for LM2904WHYDT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2904WHYDT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM2904WHYDT reliable?
The price and inventory of LM2904WHYDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904WHYDT is usually 5 days.
3.What payment methods are accepted for LM2904WHYDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904WHYDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2904WHYDT?
LM2904WHYDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2904WHYDT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM2904WHYDT?
For technical support, including LM2904WHYDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904WHYDT requirements.
6.How does Aetrix verify that LM2904WHYDT is sourced from the original manufacturer or authorized distributors?
All LM2904WHYDT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM2904WHYDT meets industry standards.
7.What is the process for return or replacement of LM2904WHYDT?
All LM2904WHYDT units undergo pre-shipment inspection (PSI). If there is an issue with LM2904WHYDT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM2904WHYDT part is unused and in its original packaging.
Return procedure for LM2904WHYDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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