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STMicroelectronics LM2904PT
- Part No.:
- LM2904PT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2904PT.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:34,088
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Product details
Overview
LM2904PT from STMicroelectronics is a dual, low-power operational amplifier optimized for single-supply operation in automotive and industrial control systems. It features 100 dB large-signal voltage gain, 1.1 MHz unity-gain bandwidth, 20 nA input bias current, rail-to-rail input common-mode range (including negative rail), and output swing from 0 V to (VCC − 1.5 V). It operates from 3 V to 30 V supply and supports transducer amplification and DC gain blocks in 5 V logic-compatible systems.
For engineers reviewing the LM2904PT datasheet, LM2904PT pinout, LM2904PT application, or LM2904PT equivalent, key selection criteria include input offset voltage drift (7–30 µV/°C), supply current independence from VCC, ESD robustness (2000 V HBM for automotive variants), and TSSOP8 package suitability for space-constrained PCB layouts with wettable flank inspection capability.
Technical Context
The LM2904PT implements internally compensated frequency response for stable unity-gain operation across temperature (−40 °C to +125 °C) and supply voltage (3–30 V). Its PNP-input stage enables input common-mode voltage down to the negative rail and differential input range equal to full supply voltage.
It delivers 40 mA short-circuit output current per channel with thermal protection, supports infinite output short-circuit duration at VCC ≤ 15 V, and maintains 65–100 dB supply voltage rejection ratio over its operating range - critical for noisy automotive power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 30 V - enables direct interface with 5 V logic and 24 V industrial buses without level-shifting. |
| Large-Signal Voltage Gain | 50–100 V/mV (typ. 100 dB) - ensures high-precision DC amplification in sensor signal conditioning. |
| Unity-Gain Bandwidth | 1.1 MHz (temperature-compensated) - supports audio-band and low-speed control loop applications. |
| Input Bias Current | 20 nA (typ.) - minimizes error in high-impedance source interfaces like thermistors or photodiodes. |
| Input Offset Voltage | 2–7 mV (LM2904PT, 25 °C) - defines baseline DC error in precision DC gain stages. |
| Output Voltage Swing | 0 V to (VCC − 1.5 V) - allows near-ground output in single-supply configurations for ADC interfacing. |
| Supply Current per Amplifier | 0.35–0.6 mA (typ. at 5 V) - enables low-power operation in battery-backed or energy-sensitive modules. |
Pinout & Package
LM2904PT is supplied in a 8-pin TSSOP package (3.0 mm × 4.4 mm footprint, 0.65 mm pitch) with wettable flanks for automated optical solder-joint inspection. The exposed thermal pad is not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Amplifier 1 output | Delivers amplified signal; capable of sourcing/sinking up to 40 mA; swing limited to 0 V–(VCC−1.5 V). |
| 2 (IN1−) | Inverting input of Amp1 | Differential input node; accepts signals within VCC− to (VCC+ − 2 V); clamped at ±32 V absolute max. |
| 3 (IN1+) | Non-inverting input of Amp1 | High-impedance input (20 nA bias); common-mode range includes ground; supports AC/DC coupling. |
| 4 (VCC−) | Negative supply / ground reference | Return path for both amplifiers; must be connected to system ground or negative rail in dual-supply mode. |
| 5 (IN2+) | Non-inverting input of Amp2 | Independent of Amp1; identical electrical characteristics; enables dual-channel signal processing. |
| 6 (IN2−) | Inverting input of Amp2 | Matches Pin 2 behavior; supports summing, differential, or inverting configurations per channel. |
| 7 (OUT2) | Amplifier 2 output | Electrically isolated from OUT1; shares same VCC+/VCC− rails; channel separation >120 dB at 1–20 kHz. |
| 8 (VCC+) | Positive supply | Single 3–30 V supply input; supply current independent of voltage magnitude; internal regulation absent. |
Key Features
| Feature | Design Value |
|---|---|
| Internal frequency compensation | Guarantees stable unity-gain operation without external components across full temperature and supply range. |
| Rail-to-rail input common-mode range | Enables direct sensing of signals referenced to ground in single-supply systems (e.g., current-sense shunts). |
| Low input bias current (20 nA) | Reduces voltage error in high-Z sensor interfaces (e.g., pH electrodes, piezoelectric transducers). |
| Enhanced ESD protection (2000 V HBM) | Meets AEC-Q100 stress requirements for automotive under-hood environments and industrial handling. |
| Wide supply range (3–30 V) | Eliminates need for dedicated op-amp supplies - powers directly from 5 V logic rails or 24 V field buses. |
Applications
| Automotive Cabin Sensors | Industrial 4–20 mA Transmitter |
|---|---|
|
Use Scenario: Amplifying low-level signals from NTC thermistors and pressure sensors in HVAC and seat occupancy modules. IC Role / Device Role / Timing Role: Dual-channel DC gain block with rail-to-rail input enabling ground-referenced sensor excitation and output buffering into MCU ADCs. Use Value: 20 nA input bias current prevents loading of high-resistance NTC elements; 125 °C operating range matches cabin ambient limits. |
Use Scenario: Converting 0–5 V process controller outputs to standardized 4–20 mA current loops driving remote actuators. IC Role / Device Role / Timing Role: Precision current-source driver using one op-amp in Howland configuration; second op-amp conditions feedback voltage. Use Value: 7 mV max input offset voltage minimizes zero-error in loop calibration; 30 V supply headroom supports 24 V loop compliance. |
| Smart Energy Meter Front-End | Medical Patient Monitor Signal Chain |
|
Use Scenario: Isolated voltage and current sensing in polyphase electricity meters with anti-tampering diagnostics. IC Role / Device Role / Timing Role: Dual op-amp performing simultaneous shunt-based current amplification and transformer-coupled voltage scaling. Use Value: 100 dB open-loop gain ensures <0.1% gain error over temperature; 1.1 MHz bandwidth supports harmonic analysis up to 50th order. |
Use Scenario: Low-noise amplification of ECG electrode signals prior to 24-bit delta-sigma ADC sampling. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier front-end (with external resistors) rejecting common-mode interference from mains coupling. Use Value: 85 dB CMRR at 30 V supply suppresses 50/60 Hz pickup; 55 nV/√Hz input noise preserves microvolt-level cardiac signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2904DT | SO8 package (5.0 mm × 4.0 mm); higher RthJA (125 °C/W); no wettable flanks. | Better suited for through-hole prototyping or legacy board designs requiring SOIC footprint. | Select when manual rework, thermal margin >100 °C, or compatibility with existing SO8 tooling is required. |
| LM2904WYPT | AEC-Q100 qualified; enhanced ESD (2000 V HBM); tighter input offset voltage (1–2 mV typ.); same TSSOP8 package. | Required for automotive powertrain or ADAS modules where functional safety and long-term reliability are mandated. | Choose for production automotive systems needing certified grade, lower offset drift, and extended lifetime validation. |
Compared with LM2904DT, LM2904PT offers superior manufacturability via wettable flanks and smaller footprint; compared with LM2904WYPT, it trades AEC-Q100 qualification and tighter offset for cost-sensitive industrial applications where 7 mV offset and 125 °C operation remain sufficient.
Availability
LM2904PT is available at Aetrix Electronics and suitable for automotive cabin electronics, industrial 4–20 mA transmitters, and smart energy meter front-ends requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM2904PT 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 analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.
The LM2904 series belongs to ST's precision analog portfolio, engineered specifically for robust single-supply operation in harsh environments - emphasizing low power, rail-to-rail input, and automotive-grade reliability.
FAQ
Can LM2904PT operate from a 3.3 V supply?
Yes. LM2904PT is specified for 3 V to 30 V single-supply operation. At 3.3 V, output swing is 0 V to ~1.8 V, input common-mode range extends to ground, and quiescent current remains ~0.7 mA total. Performance metrics such as gain and CMRR are maintained per datasheet Table 2 and Table 3 conditions.
Does LM2904PT require external compensation capacitors?
No. LM2904PT integrates frequency compensation internally and is unity-gain stable across its full operating range. No external capacitor is needed for basic inverting/non-inverting configurations. Stability margins exceed 45° at 100 pF capacitive load per Figure 20 in DS0508 Rev 21.
What is the maximum capacitive load LM2904PT can drive directly?
LM2904PT can safely drive up to 100 pF without phase-margin degradation, as verified in Figure 20 (Phase Margin vs. Capacitive Load). For loads >100 pF, a series isolation resistor (≥100 Ω) is recommended between output and capacitance to maintain stability in unity-gain follower configurations.
Is LM2904PT pin-compatible with LM2904DT or LM2904ST?
Yes - all LM2904 variants (PT/TSSOP8, DT/SO8, ST/MiniSO8) share identical pinout per Figure 4 of DS0508. Functionally identical circuitry means direct PCB footprint substitution is possible, though thermal performance and assembly yield differ due to package geometry and thermal resistance values.
LM2904PT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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:
- 800 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 700µA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
LM2904PT FAQ
1.How can I place an order for LM2904PT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2904PT 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 LM2904PT reliable?
The price and inventory of LM2904PT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904PT is usually 5 days.
3.What payment methods are accepted for LM2904PT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904PT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2904PT?
LM2904PT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2904PT 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 LM2904PT?
For technical support, including LM2904PT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904PT requirements.
6.How does Aetrix verify that LM2904PT is sourced from the original manufacturer or authorized distributors?
All LM2904PT 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 LM2904PT meets industry standards.
7.What is the process for return or replacement of LM2904PT?
All LM2904PT units undergo pre-shipment inspection (PSI). If there is an issue with LM2904PT, 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 LM2904PT part is unused and in its original packaging.
Return procedure for LM2904PT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2904PT Tags
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