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STMicroelectronics LM2904BYST
- Part No.:
- LM2904BYST
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM2904BYST.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8MINISO
- Quantity:
- Payment:
- Shipping:
Inventory:241
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Product details
Overview
LM2904BYST from STMicroelectronics is an AEC-Q100 qualified dual operational amplifier designed for automotive and industrial single-supply systems. It operates from 3 V to 36 V, delivers 1.2 MHz unity-gain bandwidth, achieves 100 dB large-signal voltage gain, and supports rail-to-rail input (including negative rail) with output swing to 0 V and up to VCC − 1.5 V - enabling direct interfacing with 5 V logic and sensor signal conditioning in engine control units.
For engineers reviewing the LM2904BYST datasheet, LM2904BYST pinout, LM2904BYST application, or LM2904BYST equivalent, key selection criteria include its guaranteed 36 V operation, temperature-compensated 20 nA input bias current, −40 °C to +125 °C automotive-grade operating range, and MiniSO8 wettable flank package compatibility with automated optical inspection.
Technical Context
The LM2904BYST 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 support common-mode voltage down to VCC−, while the output stage provides class-AB sourcing/sinking capability with 32 mA typical source and 18 mA sink current at 36 V.
It features temperature-compensated offset drift (7–30 µV/°C), supply voltage rejection ratio of 65–100 dB across 5–36 V, and channel separation of 120 dB at 1–20 kHz - critical for dual-channel signal chains where crosstalk must remain below −120 dB in battery management or ADAS sensor front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 36 V - enables direct use with 12 V/24 V automotive batteries and industrial 24 V rails without regulation. |
| Unity-Gain Bandwidth | 1.2 MHz - supports accurate amplification of signals up to ~100 kHz with ≤1% gain error in closed-loop configurations. |
| Large-Signal Voltage Gain | 100 dB (typ.) - ensures ≤0.1% nonlinear distortion in precision DC-coupled gain blocks for current sensing. |
| Input Bias Current | 20 nA (temp-compensated) - minimizes voltage error across high-impedance sensor interfaces like thermistor or strain gauge bridges. |
| Common-Mode Input Range | VCC− to VCC+ − 1.5 V - allows direct connection of ground-referenced sensors without level-shifting circuitry. |
| Output Voltage Swing | 0 V to VCC − 1.5 V - delivers full dynamic range into loads referenced to ground, e.g., ADC drivers or comparator inputs. |
| Slew Rate | 0.6 V/µs (typ. at 36 V) - supports <1 µs settling for 1 V step responses, suitable for medium-speed control loop feedback paths. |
Pinout & Package
LM2904BYST is supplied in MiniSO8 package (3.0 mm × 4.9 mm, 0.65 mm pitch), a compact, wettable flank variant optimized for automated optical inspection and solder joint reliability in automotive PCB assemblies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Out1 | Amplifier 1 output | Class-AB output capable of sourcing 32 mA / sinking 18 mA; connects directly to ADC input or next-stage buffer. |
| 2 - In1− | Amplifier 1 inverting input | Differential input node; used with feedback network for inverting configuration or as summing junction. |
| 3 - In1+ | Amplifier 1 non-inverting input | High-impedance input (20 nA bias); accepts ground-referenced sensor signals without level shift. |
| 4 - VCC− | Negative supply / ground reference | Common return path for both amplifiers; must be low-impedance to minimize PSRR degradation. |
| 5 - In2+ | Amplifier 2 non-inverting input | Independent high-Z input; enables dual-channel signal conditioning on shared PCB area. |
| 6 - In2− | Amplifier 2 inverting input | Matches Pin 2 electrically; supports matched gain configurations for differential pair processing. |
| 7 - Out2 | Amplifier 2 output | Electrically identical to Pin 1; channel separation >120 dB prevents interference in dual-sensor applications. |
| 8 - VCC+ | Positive supply | Accepts 3–36 V; supply current remains stable (0.45–1.2 mA) across full voltage range, simplifying power budgeting. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40 °C to +125 °C operation with extended life testing - meets automotive ECU and body control module requirements. |
| Input common-mode range includes VCC− | Enables direct interface with 0 V-referenced sensors (e.g., shunt-based current monitors) without external biasing resistors. |
| Internal frequency compensation | Guarantees stability in unity-gain follower and inverting configurations without external compensation capacitors. |
| Low input offset voltage drift | 7–30 µV/°C - maintains <1 mV total offset over full temperature range, critical for precision analog front-ends. |
| Wettable flank MiniSO8 package | Facilitates automated X-ray and AOI inspection of solder joints - improves manufacturing yield in automotive production lines. |
Applications
| Engine Control Unit (ECU) Sensor Interface | Automotive Battery Management System (BMS) |
|---|---|
|
Use Scenario: Amplifying low-level signals from exhaust gas oxygen (EGO) sensors and throttle position sensors in harsh under-hood environments. IC Role / Device Role / Timing Role: Dual-channel DC-coupled transducer amplifier providing gain, filtering, and level shifting before ADC sampling. Use Value: Input common-mode range extending to ground and 36 V tolerance allow direct connection to unregulated 12 V battery rails and sensor outputs referenced to chassis ground. |
Use Scenario: Monitoring cell voltage and pack current in 12–48 V EV auxiliary battery systems with high EMC immunity requirements. IC Role / Device Role / Timing Role: Precision current-sense amplifier and voltage monitor front-end with rail-to-rail input and stable DC gain. Use Value: 100 dB open-loop gain and 65–100 dB PSRR ensure accurate measurement despite battery ripple and load transients up to 36 V. |
| Industrial PLC Analog Input Module | Automotive ADAS Camera Power Monitor |
|
Use Scenario: Conditioning 4–20 mA loop signals and thermocouple outputs in programmable logic controller I/O cards operating at 24 V DC. IC Role / Device Role / Timing Role: Dual op-amp configured as current-to-voltage converter and cold-junction compensator. Use Value: 20 nA input bias current minimizes error across high-value shunt resistors (e.g., 250 Ω), preserving 0.1% accuracy in 16-bit DAQ systems. |
Use Scenario: Real-time monitoring of camera module supply voltage and current draw to detect brown-out or short-circuit faults. IC Role / Device Role / Timing Role: Dual-channel comparator driver and analog monitor feeding diagnostic microcontroller ADC inputs. Use Value: Guaranteed operation at −40 °C to +125 °C and 120 dB channel separation prevent false triggers during thermal cycling and EMI exposure near radar modules. |
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, same electrical specs but no wettable flanks; RthJA = 125 °C/W vs. 190 °C/W for MiniSO8. | Lacks AOI-friendly wettable flanks; less suitable for high-reliability automotive SMT lines requiring solder joint verification. | Select when legacy SO8 footprint compatibility is required and AOI is not mandated by OEM process controls. |
| TSV912IDT | Higher GBW (8 MHz), lower VOS (1.5 mV max), but only rated to 24 V and −40 °C to +125 °C (non-AEC-Q100). | Not qualified for automotive safety-critical functions; unsuitable for ECU or BMS where AEC-Q100 compliance is mandatory. | Choose only for industrial non-automotive applications needing higher speed and lower offset, with relaxed voltage and qualification requirements. |
Compared with LM2904DT and TSV912IDT, LM2904BYST uniquely combines AEC-Q100 qualification, 36 V operation, wettable flank MiniSO8 packaging, and guaranteed −40 °C to +125 °C performance - making it the only option among the three qualified for under-hood automotive signal conditioning where reliability, voltage margin, and manufacturability are jointly constrained.
Availability
LM2904BYST is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC analog input modules, and battery management systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM2904BYST 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 discrete technologies with over 40 years of analog IC design heritage.
The LM2904B series belongs to ST's automotive-grade precision op-amp product line, engineered specifically for robust signal conditioning in harsh environments where wide supply range, temperature stability, and AEC-Q100 compliance are mandatory.
FAQ
Is LM2904BYST pin-compatible with standard LM2904 variants?
Yes - LM2904BYST uses the industry-standard MiniSO8 pinout (identical to SO8 and TSSOP8 variants per Figure 3 of DS13602), supporting drop-in replacement in existing designs. All eight pins match function-for-function: Out1, In1−, In1+, VCC−, In2+, In2−, Out2, VCC+. No layout changes are needed when upgrading from non-automotive LM2904 versions with the same package.
What is the maximum capacitive load the LM2904BYST can drive stably?
LM2904BYST maintains ≥45° phase margin with up to 100 pF capacitive load at 36 V supply (per Figure 10), making it suitable for driving ADC input capacitors and moderate-length PCB traces. For loads exceeding 100 pF, a series resistor (≥100 Ω) between output and capacitance is recommended to preserve stability without degrading DC accuracy.
Does LM2904BYST support dual-supply operation?
No - LM2904BYST is specified and characterized exclusively for single-supply operation from 3 V to 36 V, with VCC− tied to ground or system common. Its input common-mode range extends to VCC−, but the device lacks symmetric ±VCC rating or dual-supply absolute maximum ratings; using split supplies may violate absolute maximum conditions and void AEC-Q100 qualification.
How does the wettable flank feature improve manufacturing yield?
The MiniSO8 wettable flanks on LM2904BYST expose solderable metal along the side walls of the package, enabling automated X-ray and AOI systems to inspect solder fillet formation and voiding - critical for detecting head-in-pillow defects in automotive SMT lines. This reduces field failure rates in vibration-prone applications and satisfies OEM process audit requirements for solder joint reliability validation.
LM2904BYST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Single-Ended
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 150 nA
- Voltage - Input Offset:
- 4 mV
- Current - Supply:
- 700µA
- Current - Output / Channel:
- 32 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MiniSO
LM2904BYST FAQ
1.How can I place an order for LM2904BYST through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2904BYST 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 LM2904BYST reliable?
The price and inventory of LM2904BYST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904BYST is usually 5 days.
3.What payment methods are accepted for LM2904BYST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904BYST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2904BYST?
LM2904BYST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2904BYST 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 LM2904BYST?
For technical support, including LM2904BYST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904BYST requirements.
6.How does Aetrix verify that LM2904BYST is sourced from the original manufacturer or authorized distributors?
All LM2904BYST 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 LM2904BYST meets industry standards.
7.What is the process for return or replacement of LM2904BYST?
All LM2904BYST units undergo pre-shipment inspection (PSI). If there is an issue with LM2904BYST, 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 LM2904BYST part is unused and in its original packaging.
Return procedure for LM2904BYST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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