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STMicroelectronics LM2904WPT
- Part No.:
- LM2904WPT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2904WPT.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,894
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Product details
Overview
LM2904WPT from STMicroelectronics is a low-power dual operational amplifier designed for single-supply automotive and industrial control systems. It features 100 dB DC voltage gain, 1.1 MHz unity-gain bandwidth, 500 µA per channel supply current, ±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 and supports transducer amplification in engine control units.
For engineers reviewing the LM2904WPT datasheet, LM2904WPT pinout, LM2904WPT application, or LM2904WPT equivalent, key selection criteria include its automotive-qualified TSSOP8 package, −40°C to +125°C operating range, internal frequency compensation, and input common-mode range extending to ground - critical for sensor interface circuits in harsh environments.
Technical Context
The LM2904WPT integrates two independent high-gain op-amps with internal frequency compensation, enabling stable unity-gain operation without external components. Its input stage uses PNP transistors to achieve input common-mode voltage range down to the negative rail (ground in single-supply use) and differential input voltage range equal to the full supply voltage.
Output stage design supports large voltage swing (0 V to VCC − 1.5 V) under load, with typical short-circuit current of 40 mA and thermal resistance (RthJA) of 120 °C/W in TSSOP8. ESD protection meets 2 kV HBM, and it is qualified per AEC-Q100 for automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 30 V - enables direct interfacing with 5 V logic rails and compatibility with 12 V/24 V automotive systems. |
| DC Voltage Gain | 100 dB - ensures high-precision amplification of low-level sensor signals (e.g., thermistor or strain gauge outputs). |
| Unity-Gain Bandwidth | 1.1 MHz - supports audio-frequency and medium-speed control loop applications (e.g., motor current sensing). |
| Supply Current per Channel | 500 µA - allows battery-powered or energy-constrained modules (e.g., body control units) to integrate dual amplification with minimal quiescent load. |
| Input Offset Voltage | 7 mV max (LM2904W, −40°C to +125°C) - defines baseline error in DC-coupled gain stages; suitable for non-precision signal conditioning. |
| Input Bias Current | 20 nA typ (temperature compensated) - minimizes loading on high-impedance sources like piezoelectric sensors or pH electrodes. |
| Common-Mode Input Range | Includes negative rail (0 V) - permits true single-supply operation with inputs referenced to ground, eliminating level-shifting circuitry. |
| Output Voltage Swing | 0 V to (VCC − 1.5 V) - delivers usable dynamic range near ground and supply rails for analog-to-digital converter (ADC) interfacing. |
Pinout & Package
TSSOP8 (Thin Shrink Small Outline Package), 3.0 mm × 4.4 mm body, 0.65 mm pitch, 8-pin surface-mount package compliant with ECOPACK® environmental standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input A | Receives feedback signal for channel A; compatible with standard inverting amplifier configurations. |
| 2 | Non-inverting Input A | Accepts reference or sensor signal for channel A; supports DC-coupled inputs down to ground. |
| 3 | Output A | Delivers amplified output with rail-to-rail swing capability; drives loads up to 40 mA short-circuit current. |
| 4 | VCC− (Ground) | Negative power terminal; serves as reference for single-supply operation and input common-mode range. |
| 5 | VCC+ | Positive supply rail (3–30 V); powers both op-amp channels and determines output voltage ceiling. |
| 6 | Output B | Amplified output of second channel; electrically isolated from Output A, enabling dual-path signal processing. |
| 7 | Inverting Input B | Feedback node for channel B; identical electrical behavior to Pin 1, supporting independent dual-amplifier topologies. |
| 8 | Non-inverting Input B | Signal input for channel B; shares same input stage architecture and bias characteristics as Pin 2. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Frequency Compensation | Enables stable unity-gain operation without external compensation capacitors - reduces BOM count and layout sensitivity. |
| Automotive Qualification (AEC-Q100) | Validated for −40°C to +125°C operation and robustness against thermal cycling, vibration, and ESD - suitable for powertrain and chassis modules. |
| Input Common-Mode Range Includes Ground | Eliminates need for input biasing networks in single-supply sensor interfaces (e.g., resistive temperature detectors), simplifying PCB design. |
| Low Input Offset Current (2 nA max) | Minimizes error in high-impedance differential configurations (e.g., bridge amplifiers), preserving measurement accuracy. |
| ESD Protection (2 kV HBM) | Provides built-in transient immunity during handling and system integration - reduces need for external TVS diodes in cost-sensitive designs. |
| Wide Supply Range (3–30 V) | Supports direct connection to unregulated vehicle batteries (12 V/24 V) and logic-compatible 5 V rails - enhances system-level power architecture flexibility. |
Applications
| Engine Coolant Temperature Sensing | Brake Pressure Signal Conditioning |
|---|---|
|
Use Scenario: Amplifies low-voltage output from NTC thermistors embedded in engine coolant passages. IC Role / Device Role / Timing Role: Dual-channel DC gain block converting resistance changes into precise voltage levels for MCU ADC sampling. Use Value: Input common-mode range to ground enables direct thermistor-to-opamp connection without level shifters; 500 µA/channel current supports always-on monitoring in sleep-mode ECUs. |
Use Scenario: Conditions millivolt-level signals from piezoresistive brake pressure transducers in ABS modules. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier (with external resistors) providing 100× gain and noise filtering before ADC digitization. Use Value: 2 nA max input offset current prevents drift-induced errors in long-duration pressure hold tests; AEC-Q100 qualification ensures reliability under brake-system thermal stress. |
| Body Control Unit Window Lift Interface | Industrial PLC Analog Input Module |
|
Use Scenario: Interfaces hall-effect position sensors monitoring window glass travel in automotive door modules. IC Role / Device Role / Timing Role: Single-supply non-inverting amplifier with rail-to-rail output driving comparator thresholds for direction and stall detection. Use Value: Output swing to 0 V enables clean zero-crossing detection; TSSOP8 footprint saves space in compact door module PCBs. |
Use Scenario: Scales and buffers 4–20 mA current loop signals from field transmitters in factory automation systems. IC Role / Device Role / Timing Role: Dual op-amp configured as precision I/V converter and buffer for isolation-stage inputs. Use Value: 100 dB gain supports accurate 16-bit ADC resolution; wide 3–30 V supply accommodates diverse industrial power rails (e.g., 24 V DC). |
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 |
|---|---|---|---|
| LM2904DT | SO-8 package, same electrical specs, non-automotive grade (−40°C to +105°C) | Limited to industrial/commercial temperature range; not AEC-Q100 qualified | Select when automotive qualification is unnecessary and board space allows SO-8 footprint. |
| TSV912IDT | Higher GBW (8 MHz), lower VOS (1.5 mV), but higher IQ (820 µA/channel) | Better AC performance and DC precision, at cost of increased power consumption | Choose for higher-bandwidth sensor interfaces where 500 µA/channel budget is exceeded. |
Compared with LM2904DT, LM2904WPT adds AEC-Q100 qualification and extended temperature range but shares identical core op-amp performance; versus TSV912IDT, it trades bandwidth and offset voltage for significantly lower quiescent current and automotive compliance - making it optimal for cost- and power-sensitive automotive analog front-ends.
Availability
LM2904WPT is available at Aetrix Electronics and suitable for engine control units, brake system electronics, body control modules, and industrial programmable logic controllers requiring stable component supply across automotive production lifecycles.
Supply support for LM2904WPT 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, specializing in automotive, industrial, and power management ICs with vertical manufacturing capabilities and broad automotive qualification expertise.
The LM2904W series belongs to ST's precision analog portfolio, engineered specifically for robust, low-cost signal conditioning in automotive powertrain and chassis systems where reliability under thermal and electrical stress is mandatory.
FAQ
Is LM2904WPT pin-compatible with LM2904DT?
Yes - both devices share identical 8-pin TSSOP (LM2904WPT) and SO-8 (LM2904DT) pinouts: Pin 1 (In−A), Pin 2 (In+A), Pin 3 (OutA), Pin 4 (VCC−), Pin 5 (VCC+), Pin 6 (OutB), Pin 7 (In−B), Pin 8 (In+B). Electrical behavior and internal topology are functionally identical; only package and qualification differ.
Can LM2904WPT drive a 2 kΩ load at 5 V supply?
Yes - at VCC = 5 V, LM2904WPT delivers a minimum output voltage swing of 0 V to 3.5 V into a 2 kΩ load (per datasheet Figure 3), with typical short-circuit current of 40 mA. Output stage remains linear within this range, supporting direct ADC interfacing without buffering.
What is the maximum junction temperature for continuous operation?
The absolute maximum junction temperature is 150°C (per Table 1, "Absolute maximum ratings"). With RthJA = 120 °C/W in TSSOP8 and ambient ≤ +125°C, safe continuous operation requires power dissipation below 208 mW (calculated as (150 − 125) / 120), consistent with its 1.2 mA max total supply current at 30 V.
Does LM2904WPT require external compensation capacitors?
No - internal frequency compensation is fully implemented, enabling stable unity-gain operation across the full temperature and supply voltage range without external components. This is confirmed in the "Features" section and validated by open-loop frequency response plots (Figure 2) showing phase margin > 45° at unity gain.
LM2904WPT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 40 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
LM2904WPT FAQ
1.How can I place an order for LM2904WPT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2904WPT 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 LM2904WPT reliable?
The price and inventory of LM2904WPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904WPT is usually 5 days.
3.What payment methods are accepted for LM2904WPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904WPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2904WPT?
LM2904WPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2904WPT 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 LM2904WPT?
For technical support, including LM2904WPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904WPT requirements.
6.How does Aetrix verify that LM2904WPT is sourced from the original manufacturer or authorized distributors?
All LM2904WPT 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 LM2904WPT meets industry standards.
7.What is the process for return or replacement of LM2904WPT?
All LM2904WPT units undergo pre-shipment inspection (PSI). If there is an issue with LM2904WPT, 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 LM2904WPT part is unused and in its original packaging.
Return procedure for LM2904WPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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