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Diodes Incorporated LM2904QS-13
- Part No.:
- LM2904QS-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2904QS-13.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:12,414
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Product details
Overview
LM2904QS-13 from Diodes Incorporated is an automotive-grade dual operational amplifier with AEC-Q100 Grade 1 qualification, designed for single-supply operation from 3V to 36V. It delivers 500µA supply current per amplifier, 2mV (typ) input offset voltage, 700kHz unity-gain bandwidth, and rail-to-rail input common-mode range including ground-used in engine control sensor signal conditioning and body electronics voltage monitoring.
For engineers reviewing the LM2904QS-13 datasheet, LM2904QS-13 pinout, LM2904QS-13 application, or LM2904QS-13 equivalent, this page provides verified package mapping (SO-8), confirmed pin functions, automotive temperature range (-40°C to +125°C), output swing (0V to VCC−1.5V), and real-world substitution guidance for dual op-amp selection in safety-critical systems.
Technical Context
The LM2904QS-13 implements a PNP-input stage enabling true differential inputs and input common-mode voltage down to ground, with no external clamping required below −0.3V. Its internal bias network maintains stable 500µA supply current across 3V–36V supply range, independent of voltage magnitude.
Each amplifier features internally compensated unity-gain stability, 100dB open-loop DC gain, and 700kHz bandwidth with temperature compensation. Output stage transitions from Class A (low-signal) to Class B (high-signal) to support both sourcing and sinking up to ±20mA while minimizing quiescent power.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single supply: 3V to 36V - supports direct connection to 12V/24V automotive batteries without regulation. |
| Supply Current (per amp) | 500µA (typ) - enables low-power always-on circuits like battery monitoring without significant drain. |
| Input Offset Voltage | 2mV (typ), 10mV (max) - ensures ≤±10mV error in 12-bit ADC front-ends at room temperature. |
| Unity-Gain Bandwidth | 700kHz - sufficient for motor position feedback loops and analog sensor filtering up to ~100kHz. |
| Input Common-Mode Range | 0V to VCC−1.5V - allows direct sensing of grounded sensors (e.g., thermistors, potentiometers) on single supply. |
| Output Voltage Swing | 0V to VCC−1.5V (RL ≥ 2kΩ) - delivers full dynamic range into high-impedance loads like microcontroller ADC inputs. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood and transmission control module environments. |
Pinout & Package
LM2904QS-13 is housed in an SO-8 package (JEDEC MS-012AC) with gull-wing leads, 1.27mm pitch, and green halogen-free mold compound. Pin 1 is marked with a dot or bevelled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Channel 1 Output | Amplifier A output capable of sourcing/sinking ±20mA; requires no pull-up for rail-to-rail compatible loads. |
| 2 | Channel 1 Inverting Input | Inverting input with 20nA bias current (outward flow); accepts signals down to ground without level-shifting. |
| 3 | Channel 1 Non-Inverting Input | Non-inverting input with identical bias and common-mode specs as Pin 2; enables standard non-inverting configurations. |
| 4 | GND | Analog ground reference for both amplifiers; must be connected directly to system ground plane for noise immunity. |
| 5 | Channel 2 Non-Inverting Input | Independent input for second amplifier; shares same electrical characteristics as Pins 2–3. |
| 6 | Channel 2 Inverting Input | Second amplifier inverting input; supports dual-channel signal processing (e.g., differential pair + reference buffer). |
| 7 | Channel 2 Output | Amplifier B output; electrically isolated from Pin 1-no crosstalk above −120dB at 1–20kHz. |
| 8 | VCC | Positive supply rail; decoupling capacitor (100nF X7R) required within 5mm for stable high-frequency operation. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 certified, PPAP-capable, manufactured in IATF16949 facilities-meets OEM production traceability requirements. |
| Input stage architecture | PNP differential pair enables true ground-sensing capability and eliminates need for input bias resistors in single-supply designs. |
| Power supply independence | 500µA supply current remains stable across 3V–36V range-enables consistent performance in variable-battery applications. |
| Output drive capability | ±20mA sink/source at VCC = 15V-drives 2kΩ loads directly without external transistors in actuator interface circuits. |
| ESD robustness | 500V HBM ESD rating (SO-8)-survives handling in automotive assembly lines without additional protection circuitry. |
Applications
| Engine Coolant Temperature Sensing | Brake Fluid Level Monitoring |
|---|---|
Use Scenario: Amplifies resistance-to-voltage signal from NTC thermistor in coolant passage, feeding 12-bit microcontroller ADC. IC Role / Device Role / Timing Role: Dual op-amp configured as precision instrumentation amplifier (Ch1) and reference buffer (Ch2) for ratiometric measurement. Use Value: 2mV offset ensures <±0.5°C error over −40°C to +125°C range; rail-to-rail input captures full thermistor swing without external biasing. | Use Scenario: Conditioned voltage from capacitive fluid level sensor in master cylinder reservoir, rejecting 12V battery ripple. IC Role / Device Role / Timing Role: First amplifier acts as AC-coupled high-pass filter (fc = 1Hz), second as DC-restored comparator reference buffer. Use Value: 700kHz bandwidth rejects switching noise from adjacent DC-DC converters; 100dB CMRR suppresses common-mode ripple at sensor terminals. |
| Seat Position Feedback | 12V Battery Health Monitor |
Use Scenario: Linear potentiometer output from power seat track translated to 0–5V for MCU analog input with EMI filtering. IC Role / Device Role / Timing Role: Non-inverting amplifier (Ch1) with gain = 1.25 and RC-filtered buffer (Ch2) for stable reference voltage. Use Value: Input common-mode range includes ground allows direct pot wiper connection; 500µA current enables always-on seat memory retention. | Use Scenario: Real-time monitoring of 12V starter battery voltage during cranking, cold start, and charging cycles. IC Role / Device Role / Timing Role: Unity-gain buffer (Ch1) isolates battery sense line from MCU ADC; Ch2 buffers regulated 5V reference for ratiometric scaling. Use Value: VCC = 36V rating survives load-dump transients; −40°C to +125°C operation covers under-hood thermal extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2904QDR | Same SO-8 package, identical electrical specs, but shipped in tape-and-reel (1,000 pcs) vs. LM2904QS-13's 2,500-qty reel. | No functional difference; suitable for identical automotive applications requiring AEC-Q100 Grade 1. | Select LM2904QDR for smaller-volume prototyping or when reel size impacts SMT line setup time. |
| TSV912IQ2T | Higher 8MHz GBW, lower 1.1mV offset, but only rated to +105°C and lacks AEC-Q100 certification. | Not qualified for under-hood use; limited to cabin electronics or non-safety-critical modules. | Choose TSV912IQ2T only for cost-sensitive infotainment subsystems where extended temperature and qualification are not required. |
Compared with LM2904QDR, LM2904QS-13 offers identical performance in a larger reel optimized for high-volume automotive production; versus TSV912IQ2T, it trades bandwidth and offset for guaranteed AEC-Q100 Grade 1 compliance and full −40°C to +125°C operation-critical for powertrain and chassis control.
Availability
LM2904QS-13 is available at Aetrix Electronics and suitable for engine control units, battery management systems, and body control modules requiring stable component supply across automotive production lifecycles.
Supply support for LM2904QS-13 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal ICs for automotive, industrial, and consumer markets, with manufacturing certified to IATF16949 and AEC-Q100 standards.
The LM2904Q series belongs to Diodes' automotive-qualified precision op-amp product line, engineered specifically for sensor signal conditioning, power supply monitoring, and actuator interface in harsh-temperature vehicle environments.
FAQ
What is the maximum allowable supply voltage for LM2904QS-13?
The absolute maximum supply voltage is 36V for single-supply operation or ±18V for split supplies. Operation beyond these limits risks permanent damage. The device is characterized for reliable operation from 3V to 36V, with supply current remaining stable across that range-making it suitable for 12V and 24V automotive systems including load-dump tolerant designs.
Does LM2904QS-13 require external compensation capacitors?
No. LM2904QS-13 is internally compensated for unity-gain stability and does not require external compensation components. It maintains phase margin >45° in standard non-inverting and inverting configurations. However, driving capacitive loads >50pF requires series isolation resistance at the output to preserve stability, as specified in the datasheet's AC performance section.
Can LM2904QS-13 drive a 10kΩ load across its full temperature range?
Yes. LM2904QS-13 guarantees output voltage swing of 0V to VCC−1.5V into RL ≥ 2kΩ across −40°C to +125°C. For a 10kΩ load, the swing improves further-typically 0V to VCC−1.2V at +25°C-and remains fully functional at temperature extremes, supporting direct interfacing with microcontroller ADC inputs without attenuation.
Is LM2904QS-13 pin-compatible with legacy LM2904 variants?
Yes. LM2904QS-13 uses the industry-standard SO-8 pinout defined for dual op-amps: Pin 1 (OUT A), Pin 2 (−IN A), Pin 3 (+IN A), Pin 4 (GND), Pin 5 (+IN B), Pin 6 (−IN B), Pin 7 (OUT B), Pin 8 (VCC). This matches LM2904, LM2904B, and LM2904Q family members-enabling drop-in replacement in existing automotive PCB layouts.
LM2904QS-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- 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:
- -
- Slew Rate:
- 0.3V/µs
- Gain Bandwidth Product:
- 700 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 700µA (x2 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 2 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LM2904QS-13 FAQ
1.How can I place an order for LM2904QS-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2904QS-13 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 LM2904QS-13 reliable?
The price and inventory of LM2904QS-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904QS-13 is usually 5 days.
3.What payment methods are accepted for LM2904QS-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904QS-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2904QS-13?
LM2904QS-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2904QS-13 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 LM2904QS-13?
For technical support, including LM2904QS-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904QS-13 requirements.
6.How does Aetrix verify that LM2904QS-13 is sourced from the original manufacturer or authorized distributors?
All LM2904QS-13 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 LM2904QS-13 meets industry standards.
7.What is the process for return or replacement of LM2904QS-13?
All LM2904QS-13 units undergo pre-shipment inspection (PSI). If there is an issue with LM2904QS-13, 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 LM2904QS-13 part is unused and in its original packaging.
Return procedure for LM2904QS-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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