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STMicroelectronics LM2904WHYST
- Part No.:
- LM2904WHYST
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM2904WHYST.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT MINISO8
- Quantity:
- Payment:
- Shipping:
Inventory:5,566
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Product details
Overview
LM2904WHYST from STMicroelectronics is a dual, low-power, rail-to-rail input operational amplifier in MiniSO8 package, designed for automotive and industrial control systems. It features 100 dB DC gain, 1.1 MHz unity-gain bandwidth (temperature compensated), 500 µA supply current per amplifier, 20 nA input bias current, and input common-mode range extending to ground - enabling single-supply operation from 3 V to 30 V in transducer signal conditioning and DC gain blocks.
For engineers reviewing the LM2904WHYST datasheet, LM2904WHYST pinout, LM2904WHYST application, or LM2904WHYST equivalent, key selection considerations include its AEC-Q100-qualified MiniSO8 footprint, guaranteed operation at −40 °C to +150 °C, input offset voltage ≤7 mV (typ), output swing to 0 V (single supply), and ESD robustness (2 kV HBM).
Technical Context
This dual op-amp integrates internal frequency compensation and operates across a 3–30 V single supply with rail-to-rail input capability - including ground - and output swing from 0 V to VCC − 1.5 V. Its architecture supports stable unity-gain operation without external compensation.
Designed for harsh environments, it delivers 120 dB channel separation at 1–20 kHz, 85 dB typical CMRR, and 100 dB SVR while maintaining <30 µV/°C input offset drift and <300 pA/°C input offset current drift over temperature.
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 compatibility with wide-input automotive battery systems. |
| Input Offset Voltage | 7 mV (typ) - ensures ≤±7 mV baseline error in precision DC amplification without trimming. |
| Unity-Gain Bandwidth | 1.1 MHz (temp-compensated) - supports stable closed-loop operation up to ~100 kHz at moderate gains in sensor front-ends. |
| Supply Current per Amp | 500 µA - allows dual-amplifier operation under 1 mA total, critical for always-on automotive modules. |
| Input Bias Current | 20 nA (typ) - minimizes voltage error across high-impedance source networks (e.g., thermistor bridges). |
| Output Voltage Swing | 0 V to VCC − 1.5 V - delivers full-scale analog output down to ground on single supply, simplifying ADC interfacing. |
| ESD Protection | 2 kV HBM - meets automotive board-level ESD immunity requirements per ISO 10605. |
Pinout & Package
LM2904WHYST is housed in a MiniSO8 package (3.0 × 4.9 mm, 0.65 mm pitch), optimized for space-constrained automotive PCBs and qualified to AEC-Q100 Grade 0 (−40 °C to +150 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Amplifier 1 output | Delivers buffered, low-impedance output capable of sourcing/sinking ≥20 mA into 2 kΩ load. |
| 2 (IN1−) | Amplifier 1 inverting input | Differential node accepting feedback or signal inversion; supports common-mode voltage down to −0.3 V. |
| 3 (IN1+) | Amplifier 1 non-inverting input | High-impedance input accepting reference or sensor signals; common-mode range includes ground. |
| 4 (GND) | Power ground reference | Common return path for both amplifiers and external circuitry; must be low-impedance for noise immunity. |
| 5 (IN2+) | Amplifier 2 non-inverting input | Independent high-Z input for second signal path; electrically isolated from IN1+ with 120 dB channel separation. |
| 6 (IN2−) | Amplifier 2 inverting input | Second differential input node; identical electrical specs to IN1−, supporting dual-channel instrumentation. |
| 7 (OUT2) | Amplifier 2 output | Independent output stage with same drive strength and swing as OUT1; no crosstalk above 120 dB. |
| 8 (VCC+) | Positive supply rail | Single-supply input powering both amplifiers; accepts up to 32 V absolute max, with thermal derating above 15 V. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Includes ground and extends to VCC − 1.5 V - eliminates need for level-shifting in single-supply sensor interfaces. |
| Internal frequency compensation | Guarantees unity-gain stability without external capacitors - reduces BOM count and layout sensitivity. |
| Low input offset voltage drift | 7 µV/°C (typ) - maintains accuracy over automotive temperature extremes without recalibration. |
| Automotive-grade qualification | AEC-Q100 Grade 0 (−40 °C to +150 °C), ongoing qualification per Q001/Q002 - validated for engine bay and powertrain use. |
| Thermal resistance (MiniSO8) | RthJA = 190 °C/W - requires careful copper pour design for >1 mA total dissipation in sealed enclosures. |
Applications
| Engine Coolant Temperature Sensing | Brake Pressure Signal Conditioning |
|---|---|
|
Use Scenario: Amplifies low-level voltage from NTC thermistor in coolant loop, operating from vehicle battery (9–16 V) with ambient temperature from −40 °C to +150 °C. IC Role / Device Role / Timing Role: Dual op-amp configured as precision non-inverting amplifier (CH1) and reference buffer (CH2) for ratiometric ADC excitation. Use Value: Input common-mode range including ground enables direct thermistor connection; 20 nA bias current prevents self-heating error in high-resistance sensor legs. |
Use Scenario: Conditions piezoresistive bridge output from brake master cylinder pressure sensor, rejecting common-mode noise in high-vibration chassis environment. IC Role / Device Role / Timing Role: Dual op-amp used in instrumentation amplifier configuration (CH1/CH2 as matched gain stages) with 120 dB channel separation. Use Value: 100 dB CMRR and 85 dB typical SVR suppress battery ripple and ignition noise; 2 kV HBM withstands ESD events during service access. |
| 12 V Battery Monitoring Circuit | Electric Power Steering (EPS) Motor Current Sense |
|
Use Scenario: Measures battery voltage and charging current via shunt resistor and resistive divider, feeding data to MCU ADC with 12-bit resolution. IC Role / Device Role / Timing Role: CH1 as difference amplifier for bidirectional current sensing; CH2 as voltage follower for scaled battery voltage. Use Value: Output swing to 0 V allows full 0–3.3 V ADC range utilization; 500 µA per amp enables continuous monitoring with <1.1 mA total quiescent draw. |
Use Scenario: Amplifies mV-level shunt voltage from three-phase motor phase current in EPS control unit, requiring operation at 150 °C junction temperature. IC Role / Device Role / Timing Role: Dual op-amp implements two independent current sense paths (CH1/CH2), each with 50× gain and low-pass filtering. Use Value: Guaranteed −40 °C to +150 °C operation avoids thermal shutdown; 7 mV offset voltage limits current measurement error to <±0.35 A at 50 A full scale. |
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 |
|---|---|---|---|
| LM2904BQDR | Same dual op-amp topology but SO8 package; RthJA = 125 °C/W vs. 190 °C/W for MiniSO8; 100% tested for AEC-Q100 Grade 1 (−40 °C to +125 °C). | Preferred where PCB real estate permits larger SO8 and ambient temperature stays ≤125 °C (e.g., cabin electronics). | Select when thermal margin is sufficient and legacy SO8 footprint reuse is required. |
| TSV912IYDT | Higher GBW (8 MHz), lower offset (1.5 mV typ), but only rated to +125 °C; not AEC-Q100 qualified; MiniSO8 pin-compatible but different internal compensation. | Suitable for non-safety-critical ADAS camera modules needing higher speed, but not for powertrain or under-hood use. | Choose only for cost-sensitive, non-automotive industrial applications requiring better AC performance. |
Compared with LM2904BQDR, LM2904WHYST trades lower thermal resistance for tighter temperature rating and smaller footprint - essential for engine control units. Versus TSV912IYDT, it sacrifices bandwidth and offset for guaranteed automotive qualification and thermal robustness.
Availability
LM2904WHYST is available at Aetrix Electronics and suitable for automotive engine control units, brake-by-wire systems, and battery management systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM2904WHYST 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 and AEC-Q100 validation expertise.
LM2904WHYST belongs to ST's automotive-qualified precision op-amp product line, engineered specifically for signal conditioning in harsh-environment control systems where reliability, temperature resilience, and ESD immunity are mandatory.
FAQ
Is LM2904WHYST pin-compatible with standard LM2904 variants?
Yes - LM2904WHYST uses the industry-standard MiniSO8 pinout (1:OUT1, 2:IN1−, 3:IN1+, 4:GND, 5:IN2+, 6:IN2−, 7:OUT2, 8:VCC+), matching LM2904x MiniSO8 variants. However, it is not pin-compatible with SO8-packaged LM2904 due to different package dimensions and thermal pad layout.
What is the maximum allowable junction temperature during continuous operation?
The absolute maximum junction temperature is 160 °C, but continuous operation is specified up to 150 °C ambient with proper PCB copper area. At 150 °C ambient and 1 mA total supply current, junction temperature remains within limit if RthJA ≤ 190 °C/W is maintained via ≥200 mm² 2-oz copper pour under the MiniSO8 exposed pad.
Does LM2904WHYST support rail-to-rail output swing?
No - LM2904WHYST provides rail-to-rail *input* common-mode range (including ground), but output swing is limited to 0 V to VCC − 1.5 V under 2 kΩ load. This allows ground-referenced output but does not reach the positive rail, distinguishing it from true rail-to-rail output op-amps.
Can LM2904WHYST drive capacitive loads directly?
It can drive ≤100 pF capacitive loads stably in unity-gain configuration, as verified in Figure 5 of DS3549. For larger loads (e.g., ADC input capacitance >100 pF), a series resistor (≥100 Ω) between output and load is required to maintain phase margin and prevent oscillation.
LM2904WHYST 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:
- 0.6V/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-MiniSO
LM2904WHYST FAQ
1.How can I place an order for LM2904WHYST through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2904WHYST 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 LM2904WHYST reliable?
The price and inventory of LM2904WHYST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2904WHYST is usually 5 days.
3.What payment methods are accepted for LM2904WHYST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2904WHYST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2904WHYST?
LM2904WHYST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2904WHYST 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 LM2904WHYST?
For technical support, including LM2904WHYST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2904WHYST requirements.
6.How does Aetrix verify that LM2904WHYST is sourced from the original manufacturer or authorized distributors?
All LM2904WHYST 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 LM2904WHYST meets industry standards.
7.What is the process for return or replacement of LM2904WHYST?
All LM2904WHYST units undergo pre-shipment inspection (PSI). If there is an issue with LM2904WHYST, 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 LM2904WHYST part is unused and in its original packaging.
Return procedure for LM2904WHYST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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